{"source":"https://github.com/lichess-org/chess-openings","commit":"a6189a30dc273ccb21fc2536a9a2fefd5592a67a","license":"CC0-1.0","entries":[{"eco":"A00","name":"Amar Opening","pgn":"1. Nh3","uci":"g1h3","epd":"rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Amar Opening: Paris Gambit","pgn":"1. Nh3 d5 2. g3 e5 3. f4","uci":"g1h3 d7d5 g2g3 e7e5 f2f4","epd":"rnbqkbnr/ppp2ppp/8/3pp3/5P2/6PN/PPPPP2P/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Amar Opening: Paris Gambit, Gent Gambit","pgn":"1. Nh3 d5 2. g3 e5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O fxg3 6. hxg3","uci":"g1h3 d7d5 g2g3 e7e5 f2f4 c8h3 f1h3 e5f4 e1g1 f4g3 h2g3","epd":"rn1qkbnr/ppp2ppp/8/3p4/8/6PB/PPPPP3/RNBQ1RK1 b kq -"},{"eco":"A00","name":"Amsterdam Attack","pgn":"1. e3 e5 2. c4 d6 3. Nc3 Nc6 4. b3 Nf6","uci":"e2e3 e7e5 c2c4 d7d6 b1c3 b8c6 b2b3 g8f6","epd":"r1bqkb1r/ppp2ppp/2np1n2/4p3/2P5/1PN1P3/P2P1PPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Anderssen's Opening","pgn":"1. a3","uci":"a2a3","epd":"rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Anderssen's Opening: Polish Gambit","pgn":"1. a3 a5 2. b4","uci":"a2a3 a7a5 b2b4","epd":"rnbqkbnr/1ppppppp/8/p7/1P6/P7/2PPPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Barnes Opening","pgn":"1. f3","uci":"f2f3","epd":"rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Barnes Opening: Fool's Mate","pgn":"1. f3 e5 2. g4 Qh4#","uci":"f2f3 e7e5 g2g4 d8h4","epd":"rnb1kbnr/pppp1ppp/8/4p3/6Pq/5P2/PPPPP2P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Barnes Opening: Gedult Gambit","pgn":"1. f3 d5 2. e4 g6 3. d4 dxe4 4. c3","uci":"f2f3 d7d5 e2e4 g7g6 d2d4 d5e4 c2c3","epd":"rnbqkbnr/ppp1pp1p/6p1/8/3Pp3/2P2P2/PP4PP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Barnes Opening: Gedult Gambit","pgn":"1. f3 f5 2. e4 fxe4 3. Nc3","uci":"f2f3 f7f5 e2e4 f5e4 b1c3","epd":"rnbqkbnr/ppppp1pp/8/8/4p3/2N2P2/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Barnes Opening: Hammerschlag","pgn":"1. f3 e5 2. Kf2","uci":"f2f3 e7e5 e1f2","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -"},{"eco":"A00","name":"Clemenz Opening","pgn":"1. h3","uci":"h2h3","epd":"rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Clemenz Opening: Spike Lee Gambit","pgn":"1. h3 h5 2. g4","uci":"h2h3 h7h5 g2g4","epd":"rnbqkbnr/ppppppp1/8/7p/6P1/7P/PPPPPP2/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Creepy Crawly Formation: Classical Defense","pgn":"1. h3 d5 2. a3 e5","uci":"h2h3 d7d5 a2a3 e7e5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/8/P6P/1PPPPPP1/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Formation: Hippopotamus Attack","pgn":"1. a3 e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O 7. g3","uci":"a2a3 e7e5 b2b3 d7d5 c2c3 g8f6 d2d3 b8c6 e2e3 f8d6 f2f3 e8g8 g2g3","epd":"r1bq1rk1/ppp2ppp/2nb1n2/3pp3/8/PPPPPPP1/7P/RNBQKBNR b KQ -"},{"eco":"A00","name":"Formation: Shy Attack","pgn":"1. a3 e5 2. g3 d5 3. Bg2 Nf6 4. d3 Nc6 5. Nd2 Bd6 6. e3 O-O 7. h3","uci":"a2a3 e7e5 g2g3 d7d5 f1g2 g8f6 d2d3 b8c6 b1d2 f8d6 e2e3 e8g8 h2h3","epd":"r1bq1rk1/ppp2ppp/2nb1n2/3pp3/8/P2PP1PP/1PPN1PB1/R1BQK1NR b KQ -"},{"eco":"A00","name":"Global Opening","pgn":"1. h3 e5 2. a3","uci":"h2h3 e7e5 a2a3","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/P6P/1PPPPPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Grob Opening","pgn":"1. g4","uci":"g2g4","epd":"rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Grob Opening: Alessi Gambit","pgn":"1. g4 f5","uci":"g2g4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/6P1/8/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Grob Opening: Double Grob","pgn":"1. g4 g5","uci":"g2g4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/6P1/8/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Grob Opening: Double Grob, Coca-Cola Gambit","pgn":"1. g4 g5 2. f4","uci":"g2g4 g7g5 f2f4","epd":"rnbqkbnr/pppppp1p/8/6p1/5PP1/8/PPPPP2P/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Grob Opening: Grob Gambit","pgn":"1. g4 d5 2. Bg2","uci":"g2g4 d7d5 f1g2","epd":"rnbqkbnr/ppp1pppp/8/3p4/6P1/8/PPPPPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Grob Opening: Grob Gambit Declined","pgn":"1. g4 d5 2. Bg2 c6","uci":"g2g4 d7d5 f1g2 c7c6","epd":"rnbqkbnr/pp2pppp/2p5/3p4/6P1/8/PPPPPPBP/RNBQK1NR w KQkq -"},{"eco":"A00","name":"Grob Opening: Grob Gambit, Basman Gambit","pgn":"1. g4 d5 2. Bg2 h5 3. gxh5","uci":"g2g4 d7d5 f1g2 h7h5 g4h5","epd":"rnbqkbnr/ppp1ppp1/8/3p3P/8/8/PPPPPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Grob Opening: Grob Gambit, Fritz Gambit","pgn":"1. g4 d5 2. Bg2 Bxg4 3. c4","uci":"g2g4 d7d5 f1g2 c8g4 c2c4","epd":"rn1qkbnr/ppp1pppp/8/3p4/2P3b1/8/PP1PPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit","pgn":"1. g4 d5 2. Bg2 Bxg4 3. c4 d4 4. Bxb7 Nd7 5. 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Nc3 Ne7","uci":"g2g4 d7d5 h2h3 e7e5 f1g2 c7c6 d2d4 e5e4 c2c4 f8d6 b1c3 g8e7","epd":"rnbqk2r/pp2nppp/2pb4/3p4/2PPp1P1/2N4P/PP2PPB1/R1BQK1NR w KQkq -"},{"eco":"A00","name":"Grob Opening: London Defense","pgn":"1. g4 e5 2. h3 Nc6","uci":"g2g4 e7e5 h2h3 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/6P1/7P/PPPPPP2/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Grob Opening: Romford Countergambit","pgn":"1. g4 d5 2. Bg2 Bxg4 3. c4 d4","uci":"g2g4 d7d5 f1g2 c8g4 c2c4 d5d4","epd":"rn1qkbnr/ppp1pppp/8/8/2Pp2b1/8/PP1PPPBP/RNBQK1NR w KQkq -"},{"eco":"A00","name":"Grob Opening: Spike Attack","pgn":"1. g4 d5 2. Bg2 c6 3. g5","uci":"g2g4 d7d5 f1g2 c7c6 g4g5","epd":"rnbqkbnr/pp2pppp/2p5/3p2P1/8/8/PPPPPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Grob Opening: Spike, Hurst Attack","pgn":"1. g4 e5 2. Bg2 d5 3. c4","uci":"g2g4 e7e5 f1g2 d7d5 c2c4","epd":"rnbqkbnr/ppp2ppp/8/3pp3/2P3P1/8/PP1PPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Grob Opening: Zilbermints Gambit","pgn":"1. g4 d5 2. e4 dxe4 3. Nc3","uci":"g2g4 d7d5 e2e4 d5e4 b1c3","epd":"rnbqkbnr/ppp1pppp/8/8/4p1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Grob Opening: Zilbermints Gambit, Schiller Defense","pgn":"1. g4 d5 2. e4 dxe4 3. Nc3 h5","uci":"g2g4 d7d5 e2e4 d5e4 b1c3 h7h5","epd":"rnbqkbnr/ppp1ppp1/8/7p/4p1P1/2N5/PPPP1P1P/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit","pgn":"1. g4 d5 2. e4 dxe4 3. Nc3 e5 4. d3","uci":"g2g4 d7d5 e2e4 d5e4 b1c3 e7e5 d2d3","epd":"rnbqkbnr/ppp2ppp/8/4p3/4p1P1/2NP4/PPP2P1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Hungarian Opening","pgn":"1. g3","uci":"g2g3","epd":"rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Asten Gambit","pgn":"1. g3 Nc6 2. Nc3 d5 3. d4 e5 4. dxe5 d4 5. Ne4 f5","uci":"g2g3 b8c6 b1c3 d7d5 d2d4 e7e5 d4e5 d5d4 c3e4 f7f5","epd":"r1bqkbnr/ppp3pp/2n5/4Pp2/3pN3/6P1/PPP1PP1P/R1BQKBNR w KQkq f6"},{"eco":"A00","name":"Hungarian Opening: Burk Gambit","pgn":"1. g3 e5 2. a3 d5 3. Nf3 e4 4. Nh4 Be7 5. d3","uci":"g2g3 e7e5 a2a3 d7d5 g1f3 e5e4 f3h4 f8e7 d2d3","epd":"rnbqk1nr/ppp1bppp/8/3p4/4p2N/P2P2P1/1PP1PP1P/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Bücker Gambit","pgn":"1. g3 d5 2. Bg2 e5 3. b4","uci":"g2g3 d7d5 f1g2 e7e5 b2b4","epd":"rnbqkbnr/ppp2ppp/8/3pp3/1P6/6P1/P1PPPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Catalan Formation","pgn":"1. g3 d5 2. Bg2 e6","uci":"g2g3 d7d5 f1g2 e7e6","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Dutch Defense","pgn":"1. g3 f5","uci":"g2g3 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Indian Defense","pgn":"1. g3 Nf6","uci":"g2g3 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Myers Defense","pgn":"1. g3 g5","uci":"g2g3 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Pachman Gambit","pgn":"1. g3 f5 2. e4 fxe4 3. Qh5+ g6","uci":"g2g3 f7f5 e2e4 f5e4 d1h5 g7g6","epd":"rnbqkbnr/ppppp2p/6p1/7Q/4p3/6P1/PPPP1P1P/RNB1KBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Paris Gambit","pgn":"1. g3 e5 2. Nh3 d5 3. f4 Bxh3 4. Bxh3 exf4 5. O-O","uci":"g2g3 e7e5 g1h3 d7d5 f2f4 c8h3 f1h3 e5f4 e1g1","epd":"rn1qkbnr/ppp2ppp/8/3p4/5p2/6PB/PPPPP2P/RNBQ1RK1 b kq -"},{"eco":"A00","name":"Hungarian Opening: Reversed Alekhine","pgn":"1. g3 e5 2. Nf3","uci":"g2g3 e7e5 g1f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit","pgn":"1. g3 e5 2. Nf3 e4 3. Ng1 Nf6 4. b4","uci":"g2g3 e7e5 g1f3 e5e4 f3g1 g8f6 b2b4","epd":"rnbqkb1r/pppp1ppp/5n2/8/1P2p3/6P1/P1PPPP1P/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Reversed Modern Defense","pgn":"1. g3 d5 2. Bg2 c5","uci":"g2g3 d7d5 f1g2 c7c5","epd":"rnbqkbnr/pp2pppp/8/2pp4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Reversed Norwegian Defense","pgn":"1. g3 e5 2. Nf3 e4 3. Nh4","uci":"g2g3 e7e5 g1f3 e5e4 f3h4","epd":"rnbqkbnr/pppp1ppp/8/8/4p2N/6P1/PPPPPP1P/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Hungarian Opening: Sicilian Invitation","pgn":"1. g3 c5","uci":"g2g3 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Slav Formation","pgn":"1. g3 d5 2. Bg2 c6","uci":"g2g3 d7d5 f1g2 c7c6","epd":"rnbqkbnr/pp2pppp/2p5/3p4/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Symmetrical Variation","pgn":"1. g3 g6","uci":"g2g3 g7g6","epd":"rnbqkbnr/pppppp1p/6p1/8/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Van Kuijk Gambit","pgn":"1. g3 h5 2. Nf3 h4","uci":"g2g3 h7h5 g1f3 h5h4","epd":"rnbqkbnr/ppppppp1/8/8/7p/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A00","name":"Hungarian Opening: Winterberg Gambit","pgn":"1. g3 d5 2. Bg2 e5 3. c4 dxc4 4. b3","uci":"g2g3 d7d5 f1g2 e7e5 c2c4 d5c4 b2b3","epd":"rnbqkbnr/ppp2ppp/8/4p3/2p5/1P4P1/P2PPPBP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Kádas Opening","pgn":"1. h4","uci":"h2h4","epd":"rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Kádas Opening: Beginner's Trap","pgn":"1. h4 d5 2. Rh3","uci":"h2h4 d7d5 h1h3","epd":"rnbqkbnr/ppp1pppp/8/3p4/7P/7R/PPPPPPP1/RNBQKBN1 b Qkq -"},{"eco":"A00","name":"Kádas Opening: Koola-Koola Variation","pgn":"1. h4 a5","uci":"h2h4 a7a5","epd":"rnbqkbnr/1ppppppp/8/p7/7P/8/PPPPPPP1/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Kádas Opening: Kádas Gambit","pgn":"1. h4 c5 2. b4","uci":"h2h4 c7c5 b2b4","epd":"rnbqkbnr/pp1ppppp/8/2p5/1P5P/8/P1PPPPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Kádas Opening: Kádas Gambit","pgn":"1. h4 d5 2. d4 c5 3. Nf3 cxd4 4. c3","uci":"h2h4 d7d5 d2d4 c7c5 g1f3 c5d4 c2c3","epd":"rnbqkbnr/pp2pppp/8/3p4/3p3P/2P2N2/PP2PPP1/RNBQKB1R b KQkq -"},{"eco":"A00","name":"Kádas Opening: Kádas Gambit","pgn":"1. h4 e5 2. d4 exd4 3. c3","uci":"h2h4 e7e5 d2d4 e5d4 c2c3","epd":"rnbqkbnr/pppp1ppp/8/8/3p3P/2P5/PP2PPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Kádas Opening: Myers Variation","pgn":"1. h4 d5 2. d4 c5 3. e4","uci":"h2h4 d7d5 d2d4 c7c5 e2e4","epd":"rnbqkbnr/pp2pppp/8/2pp4/3PP2P/8/PPP2PP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Kádas Opening: Schneider Gambit","pgn":"1. h4 g5","uci":"h2h4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/7P/8/PPPPPPP1/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Kádas Opening: Steinbok Gambit","pgn":"1. h4 f5 2. e4 fxe4 3. d3","uci":"h2h4 f7f5 e2e4 f5e4 d2d3","epd":"rnbqkbnr/ppppp1pp/8/8/4p2P/3P4/PPP2PP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Lasker Simul Special","pgn":"1. g3 h5","uci":"g2g3 h7h5","epd":"rnbqkbnr/ppppppp1/8/7p/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Mieses Opening","pgn":"1. d3","uci":"d2d3","epd":"rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Mieses Opening: Myers Spike Attack","pgn":"1. d3 g6 2. g4","uci":"d2d3 g7g6 g2g4","epd":"rnbqkbnr/pppppp1p/6p1/8/6P1/3P4/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Mieses Opening: Reversed Rat","pgn":"1. d3 e5","uci":"d2d3 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Mieses Opening: Venezolana Variation","pgn":"1. d3 c5 2. Nc3 Nc6 3. g3","uci":"d2d3 c7c5 b1c3 b8c6 g2g3","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening","pgn":"1. b4","uci":"b2b4","epd":"rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening, with d5","pgn":"1. b4 d5","uci":"b2b4 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening, with d5","pgn":"1. b4 d5 2. Bb2 Nf6 3. Nf3","uci":"b2b4 d7d5 c1b2 g8f6 g1f3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/1P6/5N2/PBPPPPPP/RN1QKB1R b KQkq -"},{"eco":"A00","name":"Polish Opening: Baltic Defense","pgn":"1. b4 d5 2. Bb2 Bf5","uci":"b2b4 d7d5 c1b2 c8f5","epd":"rn1qkbnr/ppp1pppp/8/3p1b2/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Birmingham Gambit","pgn":"1. b4 c5","uci":"b2b4 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Bugayev Advance Variation","pgn":"1. b4 e5 2. Bb2 f6 3. b5","uci":"b2b4 e7e5 c1b2 f7f6 b4b5","epd":"rnbqkbnr/pppp2pp/5p2/1P2p3/8/8/PBPPPPPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Bugayev Attack","pgn":"1. b4 e5 2. a3","uci":"b2b4 e7e5 a2a3","epd":"rnbqkbnr/pppp1ppp/8/4p3/1P6/P7/2PPPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Czech Defense","pgn":"1. b4 e5 2. Bb2 d6","uci":"b2b4 e7e5 c1b2 d7d6","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Dutch Defense","pgn":"1. b4 f5","uci":"b2b4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: German Defense","pgn":"1. b4 d5 2. Bb2 Qd6","uci":"b2b4 d7d5 c1b2 d8d6","epd":"rnb1kbnr/ppp1pppp/3q4/3p4/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Grigorian Variation","pgn":"1. b4 Nc6","uci":"b2b4 b8c6","epd":"r1bqkbnr/pppppppp/2n5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Karniewski Variation","pgn":"1. b4 Nh6","uci":"b2b4 g8h6","epd":"rnbqkb1r/pppppppp/7n/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: King's Indian Variation","pgn":"1. b4 Nf6 2. Bb2 g6","uci":"b2b4 g8f6 c1b2 g7g6","epd":"rnbqkb1r/pppppp1p/5np1/8/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: King's Indian Variation, Schiffler Attack","pgn":"1. b4 Nf6 2. Bb2 g6 3. e4","uci":"b2b4 g8f6 c1b2 g7g6 e2e4","epd":"rnbqkb1r/pppppp1p/5np1/8/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: King's Indian Variation, Sokolsky Attack","pgn":"1. b4 Nf6 2. Bb2 g6 3. c4 Bg7 4. e3 d6 5. Nf3 O-O 6. d4","uci":"b2b4 g8f6 c1b2 g7g6 c2c4 f8g7 e2e3 d7d6 g1f3 e8g8 d2d4","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/1PPP4/4PN2/PB3PPP/RN1QKB1R b KQ -"},{"eco":"A00","name":"Polish Opening: Myers Variation","pgn":"1. b4 d5 2. Bb2 c6 3. a4","uci":"b2b4 d7d5 c1b2 c7c6 a2a4","epd":"rnbqkbnr/pp2pppp/2p5/3p4/PP6/8/1BPPPPPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Outflank Variation","pgn":"1. b4 c6","uci":"b2b4 c7c6","epd":"rnbqkbnr/pp1ppppp/2p5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Outflank Variation, Schuehler Gambit","pgn":"1. b4 c6 2. Bb2 a5 3. b5","uci":"b2b4 c7c6 c1b2 a7a5 b4b5","epd":"rnbqkbnr/1p1ppppp/2p5/pP6/8/8/PBPPPPPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Queen's Indian Variation","pgn":"1. b4 e6 2. Bb2 Nf6 3. b5 b6","uci":"b2b4 e7e6 c1b2 g8f6 b4b5 b7b6","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/1P6/8/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Queenside Defense","pgn":"1. b4 e6 2. Bb2 Nf6 3. b5 a6","uci":"b2b4 e7e6 c1b2 g8f6 b4b5 a7a6","epd":"rnbqkb1r/1ppp1ppp/p3pn2/1P6/8/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Rooks Swap Line","pgn":"1. b4 e6 2. Bb2 Nf6 3. b5 a6 4. a4 axb5 5. axb5 Rxa1 6. Bxa1","uci":"b2b4 e7e6 c1b2 g8f6 b4b5 a7a6 a2a4 a6b5 a4b5 a8a1 b2a1","epd":"1nbqkb1r/1ppp1ppp/4pn2/1P6/8/8/2PPPPPP/BN1QKBNR b Kk -"},{"eco":"A00","name":"Polish Opening: Schiffler-Sokolsky Variation","pgn":"1. b4 e6 2. Bb2 Nf6 3. b5 d5 4. e3","uci":"b2b4 e7e6 c1b2 g8f6 b4b5 d7d5 e2e3","epd":"rnbqkb1r/ppp2ppp/4pn2/1P1p4/8/4P3/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Schuehler Gambit","pgn":"1. b4 c6 2. Bb2 a5 3. b5 cxb5 4. e4","uci":"b2b4 c7c6 c1b2 a7a5 b4b5 c6b5 e2e4","epd":"rnbqkbnr/1p1ppppp/8/pp6/4P3/8/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Symmetrical Variation","pgn":"1. b4 b5","uci":"b2b4 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Polish Opening: Tartakower Gambit","pgn":"1. b4 e5 2. Bb2 f6 3. e4","uci":"b2b4 e7e5 c1b2 f7f6 e2e4","epd":"rnbqkbnr/pppp2pp/5p2/4p3/1P2P3/8/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A00","name":"Polish Opening: Wolferts Gambit","pgn":"1. b4 e5 2. Bb2 c5","uci":"b2b4 e7e5 c1b2 c7c5","epd":"rnbqkbnr/pp1p1ppp/8/2p1p3/1P6/8/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A00","name":"Saragossa Opening","pgn":"1. c3","uci":"c2c3","epd":"rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Sodium Attack","pgn":"1. Na3","uci":"b1a3","epd":"rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Sodium Attack: Celadon Variation","pgn":"1. Na3 e5 2. d3 Bxa3 3. bxa3 d5 4. e3 c5 5. Rb1","uci":"b1a3 e7e5 d2d3 f8a3 b2a3 d7d5 e2e3 c7c5 a1b1","epd":"rnbqk1nr/pp3ppp/8/2ppp3/8/P2PP3/P1P2PPP/1RBQKBNR b Kkq -"},{"eco":"A00","name":"Sodium Attack: Chenoboskion Variation","pgn":"1. Na3 g6 2. g4","uci":"b1a3 g7g6 g2g4","epd":"rnbqkbnr/pppppp1p/6p1/8/6P1/N7/PPPPPP1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Sodium Attack: Durkin Gambit","pgn":"1. Na3 e5 2. Nc4 Nc6 3. e4 f5","uci":"b1a3 e7e5 a3c4 b8c6 e2e4 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/2N1P3/8/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Valencia Opening","pgn":"1. d3 e5 2. Nd2","uci":"d2d3 e7e5 b1d2","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPPNPPPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening","pgn":"1. Nc3","uci":"b1c3","epd":"rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Battambang Variation","pgn":"1. a3 e5 2. Nc3","uci":"a2a3 e7e5 b1c3","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/P1N5/1PPPPPPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Billockus-Johansen Gambit","pgn":"1. Nc3 e5 2. Nf3 Bc5","uci":"b1c3 e7e5 g1f3 f8c5","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/8/2N2N2/PPPPPPPP/R1BQKB1R w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Damhaug Gambit","pgn":"1. Nc3 d5 2. f4 e5","uci":"b1c3 d7d5 f2f4 e7e5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/5P2/2N5/PPPPP1PP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Dougherty Gambit","pgn":"1. Nc3 d5 2. e4 dxe4 3. f3","uci":"b1c3 d7d5 e2e4 d5e4 f2f3","epd":"rnbqkbnr/ppp1pppp/8/8/4p3/2N2P2/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Dunst-Perrenet Gambit","pgn":"1. Nc3 d5 2. e4 dxe4 3. d3","uci":"b1c3 d7d5 e2e4 d5e4 d2d3","epd":"rnbqkbnr/ppp1pppp/8/8/4p3/2NP4/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Düsseldorf Gambit","pgn":"1. Nc3 c5 2. b4","uci":"b1c3 c7c5 b2b4","epd":"rnbqkbnr/pp1ppppp/8/2p5/1P6/2N5/P1PPPPPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Gladbacher Gambit","pgn":"1. Nc3 e5 2. b3 d5 3. e4 dxe4 4. d3","uci":"b1c3 e7e5 b2b3 d7d5 e2e4 d5e4 d2d3","epd":"rnbqkbnr/ppp2ppp/8/4p3/4p3/1PNP4/P1P2PPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Hector Gambit","pgn":"1. Nc3 d5 2. e4 dxe4 3. Bc4","uci":"b1c3 d7d5 e2e4 d5e4 f1c4","epd":"rnbqkbnr/ppp1pppp/8/8/2B1p3/2N5/PPPP1PPP/R1BQK1NR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Hergert Gambit","pgn":"1. Nc3 d6 2. f4 e5 3. fxe5 Nc6","uci":"b1c3 d7d6 f2f4 e7e5 f4e5 b8c6","epd":"r1bqkbnr/ppp2ppp/2np4/4P3/8/2N5/PPPPP1PP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Hulsemann Gambit","pgn":"1. Nc3 e5 2. e3 d5 3. Qh5 Be6","uci":"b1c3 e7e5 e2e3 d7d5 d1h5 c8e6","epd":"rn1qkbnr/ppp2ppp/4b3/3pp2Q/8/2N1P3/PPPP1PPP/R1B1KBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Jendrossek Gambit","pgn":"1. Nc3 d5 2. f4 d4 3. Ne4 f5 4. Nf2 Nf6 5. Nf3 c5 6. b4","uci":"b1c3 d7d5 f2f4 d5d4 c3e4 f7f5 e4f2 g8f6 g1f3 c7c5 b2b4","epd":"rnbqkb1r/pp2p1pp/5n2/2p2p2/1P1p1P2/5N2/P1PPPNPP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Kluever Gambit","pgn":"1. Nc3 f5 2. e4 fxe4 3. d3","uci":"b1c3 f7f5 e2e4 f5e4 d2d3","epd":"rnbqkbnr/ppppp1pp/8/8/4p3/2NP4/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Laroche Gambit","pgn":"1. Nc3 b5","uci":"b1c3 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Liebig Gambit","pgn":"1. Nc3 e5 2. e3 d5 3. Qh5 Nf6","uci":"b1c3 e7e5 e2e3 d7d5 d1h5 g8f6","epd":"rnbqkb1r/ppp2ppp/5n2/3pp2Q/8/2N1P3/PPPP1PPP/R1B1KBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Melleby Gambit","pgn":"1. Nc3 d5 2. f4 d4 3. Ne4 c5","uci":"b1c3 d7d5 f2f4 d5d4 c3e4 c7c5","epd":"rnbqkbnr/pp2pppp/8/2p5/3pNP2/8/PPPPP1PP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Myers Attack","pgn":"1. Nc3 g6 2. h4","uci":"b1c3 g7g6 h2h4","epd":"rnbqkbnr/pppppp1p/6p1/8/7P/2N5/PPPPPPP1/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Napoleon Attack","pgn":"1. Nc3 e5 2. Nf3 Nc6 3. d4","uci":"b1c3 e7e5 g1f3 b8c6 d2d4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/3P4/2N2N2/PPP1PPPP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Novosibirsk Variation","pgn":"1. Nc3 c5 2. d4 cxd4 3. Qxd4 Nc6 4. Qh4","uci":"b1c3 c7c5 d2d4 c5d4 d1d4 b8c6 d4h4","epd":"r1bqkbnr/pp1ppppp/2n5/8/7Q/2N5/PPP1PPPP/R1B1KBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Nowokunski Gambit","pgn":"1. Nc3 e5 2. f4 exf4 3. e4","uci":"b1c3 e7e5 f2f4 e5f4 e2e4","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq e3"},{"eco":"A00","name":"Van Geet Opening: Pfeiffer Gambit","pgn":"1. Nc3 d5 2. f4 d4 3. Ne4 e5","uci":"b1c3 d7d5 f2f4 d5d4 c3e4 e7e5","epd":"rnbqkbnr/ppp2ppp/8/4p3/3pNP2/8/PPPPP1PP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit","pgn":"1. Nc3 d5 2. f4 d4 3. Ne4 e5 4. Nf3","uci":"b1c3 d7d5 f2f4 d5d4 c3e4 e7e5 g1f3","epd":"rnbqkbnr/ppp2ppp/8/4p3/3pNP2/5N2/PPPPP1PP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Reversed Nimzowitsch","pgn":"1. Nc3 e5","uci":"b1c3 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Reversed Scandinavian","pgn":"1. Nc3 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qa4","uci":"b1c3 e7e5 d2d4 e5d4 d1d4 b8c6 d4a4","epd":"r1bqkbnr/pppp1ppp/2n5/8/Q7/2N5/PPP1PPPP/R1B1KBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Sicilian Two Knights","pgn":"1. Nc3 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4","uci":"b1c3 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4","epd":"r1bqkbnr/pp1ppppp/2n5/8/3N4/2N5/PPP1PPPP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Sleipnir Gambit","pgn":"1. Nc3 d5 2. e3 e5 3. d4 Bb4","uci":"b1c3 d7d5 e2e3 e7e5 d2d4 f8b4","epd":"rnbqk1nr/ppp2ppp/8/3pp3/1b1P4/2N1P3/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van Geet Opening: Twyble Attack","pgn":"1. Nc3 c5 2. Rb1","uci":"b1c3 c7c5 a1b1","epd":"rnbqkbnr/pp1ppppp/8/2p5/8/2N5/PPPPPPPP/1RBQKBNR b Kkq -"},{"eco":"A00","name":"Van Geet Opening: Tübingen Gambit","pgn":"1. Nc3 Nf6 2. g4","uci":"b1c3 g8f6 g2g4","epd":"rnbqkb1r/pppppppp/5n2/8/6P1/2N5/PPPPPP1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Venezolana Variation","pgn":"1. Nc3 d5 2. d3 Nf6 3. g3","uci":"b1c3 d7d5 d2d3 g8f6 g2g3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq -"},{"eco":"A00","name":"Van Geet Opening: Warsteiner Gambit","pgn":"1. Nc3 d5 2. f4 g5","uci":"b1c3 d7d5 f2f4 g7g5","epd":"rnbqkbnr/ppp1pp1p/8/3p2p1/5P2/2N5/PPPPP1PP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Van't Kruijs Opening","pgn":"1. e3","uci":"e2e3","epd":"rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Van't Kruijs Opening: Bouncing Bishop Variation","pgn":"1. e3 e5 2. Bc4 b5 3. Bb3","uci":"e2e3 e7e5 f1c4 b7b5 c4b3","epd":"rnbqkbnr/p1pp1ppp/8/1p2p3/8/1B2P3/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"A00","name":"Van't Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation","pgn":"1. e3 e5 2. Nc3 Nf6 3. f4 exf4 4. Nf3","uci":"e2e3 e7e5 b1c3 g8f6 f2f4 e5f4 g1f3","epd":"rnbqkb1r/pppp1ppp/5n2/8/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van't Kruijs Opening: Keoni-Hiva Gambit, Alua Variation","pgn":"1. e3 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3","uci":"e2e3 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3","epd":"r1bqkbnr/pppp1ppp/2n5/8/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Van't Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation","pgn":"1. e3 e5 2. Nc3 d5 3. f4 exf4 4. Nf3","uci":"e2e3 e7e5 b1c3 d7d5 f2f4 e5f4 g1f3","epd":"rnbqkbnr/ppp2ppp/8/3p4/5p2/2N1PN2/PPPP2PP/R1BQKB1R b KQkq -"},{"eco":"A00","name":"Ware Opening","pgn":"1. a4","uci":"a2a4","epd":"rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Ware Opening: Cologne Gambit","pgn":"1. a4 b6 2. d4 d5 3. Nc3 Nd7","uci":"a2a4 b7b6 d2d4 d7d5 b1c3 b8d7","epd":"r1bqkbnr/p1pnpppp/1p6/3p4/P2P4/2N5/1PP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A00","name":"Ware Opening: Crab Variation","pgn":"1. a4 e5 2. h4","uci":"a2a4 e7e5 h2h4","epd":"rnbqkbnr/pppp1ppp/8/4p3/P6P/8/1PPPPPP1/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Ware Opening: Meadow Hay Trap","pgn":"1. a4 e5 2. Ra3","uci":"a2a4 e7e5 a1a3","epd":"rnbqkbnr/pppp1ppp/8/4p3/P7/R7/1PPPPPPP/1NBQKBNR b Kkq -"},{"eco":"A00","name":"Ware Opening: Symmetric Variation","pgn":"1. a4 a5","uci":"a2a4 a7a5","epd":"rnbqkbnr/1ppppppp/8/p7/P7/8/1PPPPPPP/RNBQKBNR w KQkq -"},{"eco":"A00","name":"Ware Opening: Ware Gambit","pgn":"1. a4 e5 2. a5 d5 3. e3 f5 4. a6","uci":"a2a4 e7e5 a4a5 d7d5 e2e3 f7f5 a5a6","epd":"rnbqkbnr/ppp3pp/P7/3ppp2/8/4P3/1PPP1PPP/RNBQKBNR b KQkq -"},{"eco":"A00","name":"Ware Opening: Wing Gambit","pgn":"1. a4 b5 2. axb5 Bb7","uci":"a2a4 b7b5 a4b5 c8b7","epd":"rn1qkbnr/pbpppppp/8/1P6/8/8/1PPPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack","pgn":"1. b3","uci":"b2b3","epd":"rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Classical Variation","pgn":"1. b3 d5","uci":"b2b3 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Dutch Variation","pgn":"1. b3 f5","uci":"b2b3 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: English Variation","pgn":"1. b3 c5","uci":"b2b3 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Graz Attack","pgn":"1. b3 d5 2. Ba3","uci":"b2b3 d7d5 c1a3","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/BP6/P1PPPPPP/RN1QKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Indian Variation","pgn":"1. b3 Nf6","uci":"b2b3 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Modern Variation","pgn":"1. b3 e5","uci":"b2b3 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Modern Variation","pgn":"1. b3 e5 2. Bb2 Nc6","uci":"b2b3 e7e5 c1b2 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/8/1P6/PBPPPPPP/RN1QKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Modern Variation","pgn":"1. b3 e5 2. Bb2 Nc6 3. e3","uci":"b2b3 e7e5 c1b2 b8c6 e2e3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/8/1P2P3/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Modern Variation","pgn":"1. b3 e5 2. Bb2 Nc6 3. c4 Nf6","uci":"b2b3 e7e5 c1b2 b8c6 c2c4 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/1P6/PB1PPPPP/RN1QKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Pachman Gambit","pgn":"1. b3 e5 2. Bb2 Nc6 3. f4","uci":"b2b3 e7e5 c1b2 b8c6 f2f4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/5P2/1P6/PBPPP1PP/RN1QKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Polish Variation","pgn":"1. b3 b5","uci":"b2b3 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Ringelbach Gambit","pgn":"1. b3 f5 2. Bb2 e6 3. e4","uci":"b2b3 f7f5 c1b2 e7e6 e2e4","epd":"rnbqkbnr/pppp2pp/4p3/5p2/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Spike Variation","pgn":"1. b3 Nf6 2. Bb2 g6 3. g4","uci":"b2b3 g8f6 c1b2 g7g6 g2g4","epd":"rnbqkb1r/pppppp1p/5np1/8/6P1/1P6/PBPPPP1P/RN1QKBNR b KQkq -"},{"eco":"A01","name":"Nimzo-Larsen Attack: Symmetrical Variation","pgn":"1. b3 b6","uci":"b2b3 b7b6","epd":"rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening","pgn":"1. f4","uci":"f2f4","epd":"rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -"},{"eco":"A02","name":"Bird Opening: Batavo-Polish Attack","pgn":"1. f4 Nf6 2. Nf3 g6 3. b4","uci":"f2f4 g8f6 g1f3 g7g6 b2b4","epd":"rnbqkb1r/pppppp1p/5np1/8/1P3P2/5N2/P1PPP1PP/RNBQKB1R b KQkq -"},{"eco":"A02","name":"Bird Opening: Double Duck Formation","pgn":"1. f4 f5 2. d4 d5","uci":"f2f4 f7f5 d2d4 d7d5","epd":"rnbqkbnr/ppp1p1pp/8/3p1p2/3P1P2/8/PPP1P1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: From's Gambit","pgn":"1. f4 e5","uci":"f2f4 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: From's Gambit, Bahr Gambit","pgn":"1. f4 e5 2. Nc3","uci":"f2f4 e7e5 b1c3","epd":"rnbqkbnr/pppp1ppp/8/4p3/5P2/2N5/PPPPP1PP/R1BQKBNR b KQkq -"},{"eco":"A02","name":"Bird Opening: From's Gambit, Langheld Gambit","pgn":"1. f4 e5 2. fxe5 d6 3. exd6 Nf6","uci":"f2f4 e7e5 f4e5 d7d6 e5d6 g8f6","epd":"rnbqkb1r/ppp2ppp/3P1n2/8/8/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: From's Gambit, Lasker Variation","pgn":"1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 g5","uci":"f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g7g5","epd":"rnbqk1nr/ppp2p1p/3b4/6p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -"},{"eco":"A02","name":"Bird Opening: From's Gambit, Lipke Variation","pgn":"1. f4 e5 2. fxe5 d6 3. exd6 Bxd6 4. Nf3 Nh6 5. d4","uci":"f2f4 e7e5 f4e5 d7d6 e5d6 f8d6 g1f3 g8h6 d2d4","epd":"rnbqk2r/ppp2ppp/3b3n/8/3P4/5N2/PPP1P1PP/RNBQKB1R b KQkq -"},{"eco":"A02","name":"Bird Opening: Hobbs Gambit","pgn":"1. f4 g5","uci":"f2f4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Hobbs-Zilbermints Gambit","pgn":"1. f4 h6 2. Nf3 g5","uci":"f2f4 h7h6 g1f3 g7g5","epd":"rnbqkbnr/pppppp2/7p/6p1/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -"},{"eco":"A02","name":"Bird Opening: Horsefly Defense","pgn":"1. f4 Nh6","uci":"f2f4 g8h6","epd":"rnbqkb1r/pppppppp/7n/8/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Lasker Gambit","pgn":"1. f4 e5 2. fxe5 f6","uci":"f2f4 e7e5 f4e5 f7f6","epd":"rnbqkbnr/pppp2pp/5p2/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Mujannah","pgn":"1. f4 Nf6 2. c4","uci":"f2f4 g8f6 c2c4","epd":"rnbqkb1r/pppppppp/5n2/8/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -"},{"eco":"A02","name":"Bird Opening: Myers Defense","pgn":"1. f4 b5","uci":"f2f4 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Platz Gambit","pgn":"1. f4 e5 2. fxe5 Ne7","uci":"f2f4 e7e5 f4e5 g8e7","epd":"rnbqkb1r/ppppnppp/8/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Schlechter Gambit","pgn":"1. f4 e5 2. fxe5 Nc6","uci":"f2f4 e7e5 f4e5 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4P3/8/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A02","name":"Bird Opening: Siegener Gambit","pgn":"1. f4 e5 2. d4 exd4 3. Nf3 c5 4. c3","uci":"f2f4 e7e5 d2d4 e5d4 g1f3 c7c5 c2c3","epd":"rnbqkbnr/pp1p1ppp/8/2p5/3p1P2/2P2N2/PP2P1PP/RNBQKB1R b KQkq -"},{"eco":"A02","name":"Bird Opening: Swiss Gambit","pgn":"1. f4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4","uci":"f2f4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4","epd":"rnbqkb1r/ppppp1pp/5n2/8/4pPP1/2N5/PPPP3P/R1BQKBNR b KQkq -"},{"eco":"A02","name":"Bird Opening: Wagner-Zwitersch Gambit","pgn":"1. f4 f5 2. e4","uci":"f2f4 f7f5 e2e4","epd":"rnbqkbnr/ppppp1pp/8/5p2/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"A03","name":"Bird Opening: Dutch Variation","pgn":"1. f4 d5","uci":"f2f4 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -"},{"eco":"A03","name":"Bird Opening: Dutch Variation, Dudweiler Gambit","pgn":"1. f4 d5 2. g4","uci":"f2f4 d7d5 g2g4","epd":"rnbqkbnr/ppp1pppp/8/3p4/5PP1/8/PPPPP2P/RNBQKBNR b KQkq -"},{"eco":"A03","name":"Bird Opening: Lasker Variation","pgn":"1. f4 d5 2. Nf3 Nf6 3. e3 c5","uci":"f2f4 d7d5 g1f3 g8f6 e2e3 c7c5","epd":"rnbqkb1r/pp2pppp/5n2/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"A03","name":"Bird Opening: Sturm Gambit","pgn":"1. f4 d5 2. c4","uci":"f2f4 d7d5 c2c4","epd":"rnbqkbnr/ppp1pppp/8/3p4/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -"},{"eco":"A03","name":"Bird Opening: Thomas Gambit","pgn":"1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3","uci":"f2f4 d7d5 b2b3 g8f6 c1b2 d5d4 g1f3 c7c5 e2e3","epd":"rnbqkb1r/pp2pppp/5n2/2p5/3p1P2/1P2PN2/PBPP2PP/RN1QKB1R b KQkq -"},{"eco":"A03","name":"Bird Opening: Williams Gambit","pgn":"1. f4 d5 2. e4","uci":"f2f4 d7d5 e2e4","epd":"rnbqkbnr/ppp1pppp/8/3p4/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"A03","name":"Bird Opening: Williams Gambit","pgn":"1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Qe2","uci":"f2f4 d7d5 e2e4 d5e4 b1c3 g8f6 d1e2","epd":"rnbqkb1r/ppp1pppp/5n2/8/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq -"},{"eco":"A03","name":"Bird Opening: Williams-Zilbermints Gambit","pgn":"1. f4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Nge2","uci":"f2f4 d7d5 e2e4 d5e4 b1c3 g8f6 g1e2","epd":"rnbqkb1r/ppp1pppp/5n2/8/4pP2/2N5/PPPPN1PP/R1BQKB1R b KQkq -"},{"eco":"A04","name":"Colle System: Rhamphorhynchus Variation","pgn":"1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+","uci":"g1f3 c7c5 e2e3 g7g6 d2d4 f8g7 d4c5 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1P5/8/4PN2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Modern Defense: Semi-Averbakh Variation, Polish Variation","pgn":"1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qb6","uci":"g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8b6","epd":"rnb1k1nr/pp1pppbp/1q4p1/2p5/2PPP3/5N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation","pgn":"1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+","uci":"g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/2PPP3/5N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted","pgn":"1. Nf3 g6 2. d4 Bg7 3. e4 d6 4. c4 c5 5. dxc5 Qa5+","uci":"g1f3 g7g6 d2d4 f8g7 e2e4 d7d6 c2c4 c7c5 d4c5 d8a5","epd":"rnb1k1nr/pp2ppbp/3p2p1/q1P5/2P1P3/5N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Defense: Kingside Variation","pgn":"1. Nf3 Nh6 2. d4 g6","uci":"g1f3 g8h6 d2d4 g7g6","epd":"rnbqkb1r/pppppp1p/6pn/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Defense: Sicilian Knight Variation","pgn":"1. Nf3 Na6 2. e4 c5","uci":"g1f3 b8a6 e2e4 c7c5","epd":"r1bqkbnr/pp1ppppp/n7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening","pgn":"1. Nf3","uci":"g1f3","epd":"rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -"},{"eco":"A04","name":"Zukertort Opening: Arctic Defense","pgn":"1. Nf3 f6","uci":"g1f3 f7f6","epd":"rnbqkbnr/ppppp1pp/5p2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Arctic Defense, Drunken Knight Variation","pgn":"1. Nf3 f6 2. e4 Nh6 3. d4 Nf7","uci":"g1f3 f7f6 e2e4 g8h6 d2d4 h6f7","epd":"rnbqkb1r/pppppnpp/5p2/8/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Basman Defense","pgn":"1. Nf3 h6","uci":"g1f3 h7h6","epd":"rnbqkbnr/ppppppp1/7p/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Black Mustang Defense","pgn":"1. Nf3 Nc6","uci":"g1f3 b8c6","epd":"r1bqkbnr/pppppppp/2n5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Drunken Cavalry Variation","pgn":"1. Nf3 Na6 2. e4 Nh6","uci":"g1f3 b8a6 e2e4 g8h6","epd":"r1bqkb1r/pppppppp/n6n/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Dutch Variation","pgn":"1. Nf3 f5","uci":"g1f3 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Herrstrom Gambit","pgn":"1. Nf3 g5","uci":"g1f3 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Kingside Fianchetto","pgn":"1. Nf3 g6","uci":"g1f3 g7g6","epd":"rnbqkbnr/pppppp1p/6p1/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Lisitsyn Gambit","pgn":"1. Nf3 f5 2. e4","uci":"g1f3 f7f5 e2e4","epd":"rnbqkbnr/ppppp1pp/8/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"A04","name":"Zukertort Opening: Lisitsyn Gambit Deferred","pgn":"1. Nf3 f5 2. d3 Nf6 3. e4","uci":"g1f3 f7f5 d2d3 g8f6 e2e4","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"A04","name":"Zukertort Opening: Pirc Invitation","pgn":"1. Nf3 d6","uci":"g1f3 d7d6","epd":"rnbqkbnr/ppp1pppp/3p4/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Polish Defense","pgn":"1. Nf3 b5","uci":"g1f3 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Queen's Gambit Invitation","pgn":"1. Nf3 e6","uci":"g1f3 e7e6","epd":"rnbqkbnr/pppp1ppp/4p3/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Queenside Fianchetto Variation","pgn":"1. Nf3 b6","uci":"g1f3 b7b6","epd":"rnbqkbnr/p1pppppp/1p6/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Ross Gambit","pgn":"1. Nf3 e5","uci":"g1f3 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Shabalov Gambit","pgn":"1. Nf3 e6 2. c4 a6 3. Nc3 c5 4. g3 b5","uci":"g1f3 e7e6 c2c4 a7a6 b1c3 c7c5 g2g3 b7b5","epd":"rnbqkbnr/3p1ppp/p3p3/1pp5/2P5/2N2NP1/PP1PPP1P/R1BQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Sicilian Invitation","pgn":"1. Nf3 c5","uci":"g1f3 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Slav Invitation","pgn":"1. Nf3 c6","uci":"g1f3 c7c6","epd":"rnbqkbnr/pp1ppppp/2p5/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Speelsmet Gambit","pgn":"1. Nf3 c5 2. d4 cxd4 3. e3","uci":"g1f3 c7c5 d2d4 c5d4 e2e3","epd":"rnbqkbnr/pp1ppppp/8/8/3p4/4PN2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"A04","name":"Zukertort Opening: St. George Defense","pgn":"1. Nf3 a6","uci":"g1f3 a7a6","epd":"rnbqkbnr/1ppppppp/p7/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: The Walrus","pgn":"1. Nf3 e5 2. Nxe5 Nc6 3. Nxc6 dxc6","uci":"g1f3 e7e5 f3e5 b8c6 e5c6 d7c6","epd":"r1bqkbnr/ppp2ppp/2p5/8/8/8/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Vos Gambit","pgn":"1. Nf3 d6 2. d4 e5","uci":"g1f3 d7d6 d2d4 e7e5","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Wade Defense","pgn":"1. Nf3 d6 2. e4 Bg4","uci":"g1f3 d7d6 e2e4 c8g4","epd":"rn1qkbnr/ppp1pppp/3p4/8/4P1b1/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"A04","name":"Zukertort Opening: Ware Defense","pgn":"1. Nf3 a5","uci":"g1f3 a7a5","epd":"rnbqkbnr/1ppppppp/8/p7/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A05","name":"King's Indian Attack","pgn":"1. Nf3 Nf6 2. g3 d5","uci":"g1f3 g8f6 g2g3 d7d5","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A05","name":"King's Indian Attack: Smyslov Variation","pgn":"1. Nf3 Nf6 2. g3 g6 3. b4","uci":"g1f3 g8f6 g2g3 g7g6 b2b4","epd":"rnbqkb1r/pppppp1p/5np1/8/1P6/5NP1/P1PPPP1P/RNBQKB1R b KQkq -"},{"eco":"A05","name":"King's Indian Attack: Spassky Variation","pgn":"1. Nf3 Nf6 2. g3 b5","uci":"g1f3 g8f6 g2g3 b7b5","epd":"rnbqkb1r/p1pppppp/5n2/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A05","name":"King's Indian Attack: Symmetrical Defense","pgn":"1. Nf3 Nf6 2. g3 g6","uci":"g1f3 g8f6 g2g3 g7g6","epd":"rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A05","name":"King's Indian Attack: Wahls Defense","pgn":"1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d5","uci":"g1f3 g8f6 g2g3 g7g6 f1g2 f8g7 e1g1 e8g8 d2d3 d7d5","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w - -"},{"eco":"A05","name":"Polish Opening: Zukertort System","pgn":"1. Nf3 Nf6 2. b4 g6 3. Bb2","uci":"g1f3 g8f6 b2b4 g7g6 c1b2","epd":"rnbqkb1r/pppppp1p/5np1/8/1P6/5N2/PBPPPPPP/RN1QKB1R b KQkq -"},{"eco":"A05","name":"Zukertort Opening","pgn":"1. Nf3 Nf6","uci":"g1f3 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A05","name":"Zukertort Opening","pgn":"1. Nf3 Nf6 2. Nc3 Nc6","uci":"g1f3 g8f6 b1c3 b8c6","epd":"r1bqkb1r/pppppppp/2n2n2/8/8/2N2N2/PPPPPPPP/R1BQKB1R w KQkq -"},{"eco":"A05","name":"Zukertort Opening: Double Fianchetto Attack","pgn":"1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. O-O","uci":"g1f3 g8f6 g2g3 g7g6 b2b3 f8g7 c1b2 e8g8 f1g2 d7d6 e1g1","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/8/1P3NP1/PBPPPPBP/RN1Q1RK1 b - -"},{"eco":"A05","name":"Zukertort Opening: Lemberger Gambit","pgn":"1. Nf3 Nf6 2. e4","uci":"g1f3 g8f6 e2e4","epd":"rnbqkb1r/pppppppp/5n2/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"A05","name":"Zukertort Opening: Myers Polish Attack","pgn":"1. Nf3 Nf6 2. a4 g6 3. b4","uci":"g1f3 g8f6 a2a4 g7g6 b2b4","epd":"rnbqkb1r/pppppp1p/5np1/8/PP6/5N2/2PPPPPP/RNBQKB1R b KQkq -"},{"eco":"A05","name":"Zukertort Opening: Nimzo-Larsen Variation","pgn":"1. Nf3 Nf6 2. b3","uci":"g1f3 g8f6 b2b3","epd":"rnbqkb1r/pppppppp/5n2/8/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -"},{"eco":"A05","name":"Zukertort Opening: Quiet System","pgn":"1. Nf3 Nf6 2. e3","uci":"g1f3 g8f6 e2e3","epd":"rnbqkb1r/pppppppp/5n2/8/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Nimzo-Larsen Attack: Classical Variation","pgn":"1. Nf3 d5 2. b3","uci":"g1f3 d7d5 b2b3","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Nimzo-Larsen Attack: Norfolk Gambit","pgn":"1. Nf3 d5 2. b3 c5 3. e4","uci":"g1f3 d7d5 b2b3 c7c5 e2e4","epd":"rnbqkbnr/pp2pppp/8/2pp4/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Nimzo-Larsen Attack: Norfolk Gambit","pgn":"1. Nf3 d5 2. b3 Nf6 3. Bb2 c5 4. e4","uci":"g1f3 d7d5 b2b3 g8f6 c1b2 c7c5 e2e4","epd":"rnbqkb1r/pp2pppp/5n2/2pp4/4P3/1P3N2/PBPP1PPP/RN1QKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening","pgn":"1. Nf3 d5","uci":"g1f3 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -"},{"eco":"A06","name":"Zukertort Opening: Ampel Variation","pgn":"1. Nf3 d5 2. Rg1","uci":"g1f3 d7d5 h1g1","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKBR1 b Qkq -"},{"eco":"A06","name":"Zukertort Opening: Old Indian Attack","pgn":"1. Nf3 d5 2. d3","uci":"g1f3 d7d5 d2d3","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Pachman Gambit","pgn":"1. Nf3 d5 2. e3 c5 3. c4 dxc4 4. b3","uci":"g1f3 d7d5 e2e3 c7c5 c2c4 d5c4 b2b3","epd":"rnbqkbnr/pp2pppp/8/2p5/2p5/1P2PN2/P2P1PPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Regina-Nu Gambit","pgn":"1. Nf3 d5 2. b3 c5 3. c4 dxc4 4. Nc3","uci":"g1f3 d7d5 b2b3 c7c5 c2c4 d5c4 b1c3","epd":"rnbqkbnr/pp2pppp/8/2p5/2p5/1PN2N2/P2PPPPP/R1BQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Reversed Mexican Defense","pgn":"1. Nf3 d5 2. Nc3","uci":"g1f3 d7d5 b1c3","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/2N2N2/PPPPPPPP/R1BQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Santasiere's Folly","pgn":"1. b4 d5 2. Nf3","uci":"b2b4 d7d5 g1f3","epd":"rnbqkbnr/ppp1pppp/8/3p4/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Tennison Gambit","pgn":"1. e4 d5 2. Nf3","uci":"e2e4 d7d5 g1f3","epd":"rnbqkbnr/ppp1pppp/8/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"A06","name":"Zukertort Opening: Tennison Gambit, Brigg's Trap","pgn":"1. e4 d5 2. Nf3 dxe4 3. Ng5 Nf6 4. Nc3 Bf5 5. Qe2 Qd4","uci":"e2e4 d7d5 g1f3 d5e4 f3g5 g8f6 b1c3 c8f5 d1e2 d8d4","epd":"rn2kb1r/ppp1pppp/5n2/5bN1/3qp3/2N5/PPPPQPPP/R1B1KB1R w KQkq -"},{"eco":"A06","name":"Zukertort Opening: The Potato","pgn":"1. Nf3 d5 2. a4","uci":"g1f3 d7d5 a2a4","epd":"rnbqkbnr/ppp1pppp/8/3p4/P7/5N2/1PPPPPPP/RNBQKB1R b KQkq -"},{"eco":"A07","name":"Hungarian Opening: Wiedenhagen-Beta Gambit","pgn":"1. g3 d5 2. Nf3 g5","uci":"g2g3 d7d5 g1f3 g7g5","epd":"rnbqkbnr/ppp1pp1p/8/3p2p1/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A07","name":"King's Indian Attack","pgn":"1. Nf3 d5 2. g3","uci":"g1f3 d7d5 g2g3","epd":"rnbqkbnr/ppp1pppp/8/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -"},{"eco":"A07","name":"King's Indian Attack, with Bf5","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/8/5NP1/PPPPPPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack, with Bf5","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 h6","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5 d2d3 h7h6","epd":"rn1qkb1r/pp2ppp1/2p2n1p/3p1b2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack, with Bf5","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 h6 6. c4 dxc4","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5 d2d3 h7h6 c2c4 d5c4","epd":"rn1qkb1r/pp2ppp1/2p2n1p/5b2/2p5/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack, with Bf5","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 e6 6. Nbd2","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5 d2d3 e7e6 b1d2","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p1b2/8/3P1NP1/PPPNPPBP/R1BQ1RK1 b kq -"},{"eco":"A07","name":"King's Indian Attack, with Bf5","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 e6 6. Nh4","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5 d2d3 e7e6 f3h4","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p1b2/7N/3P2P1/PPP1PPBP/RNBQ1RK1 b kq -"},{"eco":"A07","name":"King's Indian Attack, with e6","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 e6","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/8/5NP1/PPPPPPBP/RNBQK2R w KQkq -"},{"eco":"A07","name":"King's Indian Attack, with e6","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 e7e6 e1g1 f8e7","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/8/5NP1/PPPPPPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack: Double Fianchetto","pgn":"1. Nf3 d5 2. g3 g6","uci":"g1f3 d7d5 g2g3 g7g6","epd":"rnbqkbnr/ppp1pp1p/6p1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A07","name":"King's Indian Attack: Keres Variation","pgn":"1. Nf3 d5 2. g3 Bg4","uci":"g1f3 d7d5 g2g3 c8g4","epd":"rn1qkbnr/ppp1pppp/8/3p4/6b1/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A07","name":"King's Indian Attack: Keres Variation","pgn":"1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7","uci":"g1f3 d7d5 g2g3 c8g4 f1g2 b8d7","epd":"r2qkbnr/pppnpppp/8/3p4/6b1/5NP1/PPPPPPBP/RNBQK2R w KQkq -"},{"eco":"A07","name":"King's Indian Attack: Keres Variation","pgn":"1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. O-O Nd7","uci":"g1f3 d7d5 g2g3 c7c6 f1g2 c8g4 e1g1 b8d7","epd":"r2qkbnr/pp1npppp/2p5/3p4/6b1/5NP1/PPPPPPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack: Keres Variation","pgn":"1. Nf3 d5 2. g3 c6 3. Bg2 Bg4 4. O-O Nd7 5. d4 Ngf6 6. c4 e6 7. cxd5 exd5 8. Nc3 Bd6","uci":"g1f3 d7d5 g2g3 c7c6 f1g2 c8g4 e1g1 b8d7 d2d4 g8f6 c2c4 e7e6 c4d5 e6d5 b1c3 f8d6","epd":"r2qk2r/pp1n1ppp/2pb1n2/3p4/3P2b1/2N2NP1/PP2PPBP/R1BQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack: Omega-Delta Gambit","pgn":"1. Nf3 d5 2. g3 e5","uci":"g1f3 d7d5 g2g3 e7e5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A07","name":"King's Indian Attack: Pachman System","pgn":"1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7","uci":"g1f3 d7d5 g2g3 g7g6 f1g2 f8g7 e1g1 e7e5 d2d3 g8e7","epd":"rnbqk2r/ppp1npbp/6p1/3pp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack: Sicilian Variation","pgn":"1. Nf3 d5 2. g3 c5","uci":"g1f3 d7d5 g2g3 c7c5","epd":"rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -"},{"eco":"A07","name":"King's Indian Attack: Yugoslav Variation","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8g4","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/6b1/5NP1/PPPPPPBP/RNBQ1RK1 w kq -"},{"eco":"A07","name":"King's Indian Attack: Yugoslav Variation","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 b6 5. O-O","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 b7b6 e1g1","epd":"rnbqkb1r/p1p2ppp/1p2pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq -"},{"eco":"A08","name":"King's Indian Attack: French Variation","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nc6","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 b8c6","epd":"r1bqkbnr/pp2pppp/2n5/2pp4/8/5NP1/PPPPPPBP/RNBQK2R w KQkq -"},{"eco":"A08","name":"King's Indian Attack: Sicilian Variation","pgn":"1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 c5 5. g3 Nc6 6. Bg2 Be7 7. O-O O-O 8. Re1","uci":"e2e4 e7e6 d2d3 d7d5 b1d2 g8f6 g1f3 c7c5 g2g3 b8c6 f1g2 f8e7 e1g1 e8g8 f1e1","epd":"r1bq1rk1/pp2bppp/2n1pn2/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQR1K1 b - -"},{"eco":"A08","name":"King's Indian Attack: Sicilian Variation","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2","uci":"g1f3 d7d5 g2g3 c7c5 f1g2","epd":"rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPPBP/RNBQK2R b KQkq -"},{"eco":"A08","name":"King's Indian Attack: Sicilian Variation","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nf6 4. O-O e6 5. d3","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 g8f6 e1g1 e7e6 d2d3","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq -"},{"eco":"A08","name":"Zukertort Opening: Reversed Grünfeld","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4","epd":"r1bqkbnr/pp2pppp/2n5/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq -"},{"eco":"A08","name":"Zukertort Opening: Reversed Grünfeld","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 g8f6","epd":"r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -"},{"eco":"A08","name":"Zukertort Opening: Reversed Grünfeld","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 g8f6 e1g1","epd":"r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq -"},{"eco":"A08","name":"Zukertort Opening: Reversed Grünfeld","pgn":"1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 e6 5. O-O","uci":"g1f3 d7d5 g2g3 c7c5 f1g2 b8c6 d2d4 e7e6 e1g1","epd":"r1bqkbnr/pp3ppp/2n1p3/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq -"},{"eco":"A09","name":"Réti Opening","pgn":"1. Nf3 d5 2. c4","uci":"g1f3 d7d5 c2c4","epd":"rnbqkbnr/ppp1pppp/8/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -"},{"eco":"A09","name":"Réti Opening: Advance Variation","pgn":"1. Nf3 d5 2. c4 d4","uci":"g1f3 d7d5 c2c4 d5d4","epd":"rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A09","name":"Réti Opening: Advance Variation, Michel Gambit","pgn":"1. Nf3 d5 2. c4 d4 3. b4 c5","uci":"g1f3 d7d5 c2c4 d5d4 b2b4 c7c5","epd":"rnbqkbnr/pp2pppp/8/2p5/1PPp4/5N2/P2PPPPP/RNBQKB1R w KQkq -"},{"eco":"A09","name":"Réti Opening: Advance Variation, Navara Gambit","pgn":"1. Nf3 d5 2. c4 d4 3. b4 g5","uci":"g1f3 d7d5 c2c4 d5d4 b2b4 g7g5","epd":"rnbqkbnr/ppp1pp1p/8/6p1/1PPp4/5N2/P2PPPPP/RNBQKB1R w KQkq -"},{"eco":"A09","name":"Réti Opening: Penguin Variation","pgn":"1. Nf3 d5 2. c4 d4 3. Rg1","uci":"g1f3 d7d5 c2c4 d5d4 h1g1","epd":"rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKBR1 b Qkq -"},{"eco":"A09","name":"Réti Opening: Reversed Blumenfeld Gambit","pgn":"1. Nf3 d5 2. c4 d4 3. e3 c5 4. b4","uci":"g1f3 d7d5 c2c4 d5d4 e2e3 c7c5 b2b4","epd":"rnbqkbnr/pp2pppp/8/2p5/1PPp4/4PN2/P2P1PPP/RNBQKB1R b KQkq -"},{"eco":"A09","name":"Réti Opening: Réti Accepted","pgn":"1. Nf3 d5 2. c4 dxc4","uci":"g1f3 d7d5 c2c4 d5c4","epd":"rnbqkbnr/ppp1pppp/8/8/2p5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A09","name":"Réti Opening: Réti Gambit, Keres Variation","pgn":"1. Nf3 d5 2. c4 dxc4 3. e3 Be6","uci":"g1f3 d7d5 c2c4 d5c4 e2e3 c8e6","epd":"rn1qkbnr/ppp1pppp/4b3/8/2p5/4PN2/PP1P1PPP/RNBQKB1R w KQkq -"},{"eco":"A09","name":"Réti Opening: Zilbermints Gambit","pgn":"1. Nf3 d5 2. c4 b5","uci":"g1f3 d7d5 c2c4 b7b5","epd":"rnbqkbnr/p1p1pppp/8/1p1p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A10","name":"English Opening","pgn":"1. c4","uci":"c2c4","epd":"rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Achilles-Omega Gambit","pgn":"1. c4 Nf6 2. e4","uci":"c2c4 g8f6 e2e4","epd":"rnbqkb1r/pppppppp/5n2/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Adorjan Defense","pgn":"1. c4 g6 2. e4 e5","uci":"c2c4 g7g6 e2e4 e7e5","epd":"rnbqkbnr/pppp1p1p/6p1/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Dutch Defense","pgn":"1. c4 f5","uci":"c2c4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Dutch Defense, Hickmann Gambit","pgn":"1. c4 f5 2. e4","uci":"c2c4 f7f5 e2e4","epd":"rnbqkbnr/ppppp1pp/8/5p2/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Dutch Variation, Chabanon Gambit","pgn":"1. c4 f5 2. Nf3 d6 3. e4","uci":"c2c4 f7f5 g1f3 d7d6 e2e4","epd":"rnbqkbnr/ppp1p1pp/3p4/5p2/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Dutch Variation, Ferenc Gambit","pgn":"1. c4 f5 2. Nc3 Nf6 3. e4","uci":"c2c4 f7f5 b1c3 g8f6 e2e4","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Lithuanian Variation","pgn":"1. c4 Nc6","uci":"c2c4 b8c6","epd":"r1bqkbnr/pppppppp/2n5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Scandinavian Defense","pgn":"1. c4 d5","uci":"c2c4 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Scandinavian Defense, Löhn Gambit","pgn":"1. c4 d5 2. cxd5 e6","uci":"c2c4 d7d5 c4d5 e7e6","epd":"rnbqkbnr/ppp2ppp/4p3/3P4/8/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Scandinavian Defense, Malvinas Variation","pgn":"1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qa5","uci":"c2c4 d7d5 c4d5 d8d5 b1c3 d5a5","epd":"rnb1kbnr/ppp1pppp/8/q7/8/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Anglo-Scandinavian Defense, Schulz Gambit","pgn":"1. c4 d5 2. cxd5 Nf6","uci":"c2c4 d7d5 c4d5 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Great Snake Variation","pgn":"1. c4 g6","uci":"c2c4 g7g6","epd":"rnbqkbnr/pppppp1p/6p1/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Jaenisch Gambit","pgn":"1. c4 b5","uci":"c2c4 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System","pgn":"1. c4 g6 2. Nc3 Bg7 3. g3 Nf6 4. Bg2 O-O 5. e4 d6 6. Nge2 e5 7. O-O c6 8. d3 a6","uci":"c2c4 g7g6 b1c3 f8g7 g2g3 g8f6 f1g2 e8g8 e2e4 d7d6 g1e2 e7e5 e1g1 c7c6 d2d3 a7a6","epd":"rnbq1rk1/1p3pbp/p1pp1np1/4p3/2P1P3/2NP2P1/PP2NPBP/R1BQ1RK1 w - -"},{"eco":"A10","name":"English Opening: Myers Defense","pgn":"1. c4 g5","uci":"c2c4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Myers Gambit","pgn":"1. c4 g5 2. d4 Bg7","uci":"c2c4 g7g5 d2d4 f8g7","epd":"rnbqk1nr/ppppppbp/8/6p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A10","name":"English Opening: Porcupine Variation","pgn":"1. c4 f5 2. Nc3 Nf6 3. e4 fxe4 4. g4","uci":"c2c4 f7f5 b1c3 g8f6 e2e4 f5e4 g2g4","epd":"rnbqkb1r/ppppp1pp/5n2/8/2P1p1P1/2N5/PP1P1P1P/R1BQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Wade Gambit","pgn":"1. c4 f5 2. g4","uci":"c2c4 f7f5 g2g4","epd":"rnbqkbnr/ppppp1pp/8/5p2/2P3P1/8/PP1PPP1P/RNBQKBNR b KQkq -"},{"eco":"A10","name":"English Opening: Zilbermints Gambit","pgn":"1. c4 g5 2. d4 e5","uci":"c2c4 g7g5 d2d4 e7e5","epd":"rnbqkbnr/pppp1p1p/8/4p1p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A11","name":"English Opening: Caro-Kann Defensive System","pgn":"1. c4 c6","uci":"c2c4 c7c6","epd":"rnbqkbnr/pp1ppppp/2p5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, Gurevich System","pgn":"1. c4 c6 2. Nf3 d5 3. e3","uci":"c2c4 c7c6 g1f3 d7d5 e2e3","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2P5/4PN2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, Gurevich System","pgn":"1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Qc2","uci":"c2c4 c7c6 g1f3 d7d5 e2e3 g8f6 d1c2","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/4PN2/PPQP1PPP/RNB1KB1R b KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, Gurevich System","pgn":"1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 Nbd7 5. Qc2","uci":"c2c4 c7c6 g1f3 d7d5 e2e3 g8f6 b1c3 b8d7 d1c2","epd":"r1bqkb1r/pp1npppp/2p2n2/3p4/2P5/2N1PN2/PPQP1PPP/R1B1KB1R b KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, Gurevich System","pgn":"1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 Nbd7 5. b3 e5","uci":"c2c4 c7c6 g1f3 d7d5 e2e3 g8f6 b1c3 b8d7 b2b3 e7e5","epd":"r1bqkb1r/pp1n1ppp/2p2n2/3pp3/2P5/1PN1PN2/P2P1PPP/R1BQKB1R w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, Gurevich System","pgn":"1. c4 c6 2. Nf3 d5 3. e3 Nf6 4. Nc3 e6 5. b3 Bd6","uci":"c2c4 c7c6 g1f3 d7d5 e2e3 g8f6 b1c3 e7e6 b2b3 f8d6","epd":"rnbqk2r/pp3ppp/2pbpn2/3p4/2P5/1PN1PN2/P2P1PPP/R1BQKB1R w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. b3 g6","uci":"c2c4 c7c6 g1f3 d7d5 g2g3 g8f6 b2b3 g7g6","epd":"rnbqkb1r/pp2pp1p/2p2np1/3p4/2P5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2","uci":"c2c4 c7c6 g1f3 d7d5 g2g3 g8f6 f1g2","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R b KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4","uci":"c2c4 c7c6 g1f3 d7d5 g2g3 g8f6 f1g2 d5c4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2p5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bf5","uci":"c2c4 c7c6 g1f3 d7d5 g2g3 g8f6 f1g2 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. c4 c6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bf5 5. O-O e6 6. d3","uci":"c2c4 c7c6 g1f3 d7d5 g2g3 g8f6 f1g2 c8f5 e1g1 e7e6 d2d3","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p1b2/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -"},{"eco":"A11","name":"Réti Opening: Anglo-Slav Variation, with g3","pgn":"1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bf5 5. d3 h6 6. c4 e6","uci":"g1f3 g8f6 g2g3 d7d5 f1g2 c7c6 e1g1 c8f5 d2d3 h7h6 c2c4 e7e6","epd":"rn1qkb1r/pp3pp1/2p1pn1p/3p1b2/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/1P3NP1/P2PPP1P/RNBQKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Bled Variation","pgn":"1. Nf3 d5 2. b3 Nf6 3. Bb2 g6 4. c4 c6","uci":"g1f3 d7d5 b2b3 g8f6 c1b2 g7g6 c2c4 c7c6","epd":"rnbqkb1r/pp2pp1p/2p2np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Bogoljubow Variation","pgn":"1. Nf3 d5 2. c4 c6 3. b3","uci":"g1f3 d7d5 c2c4 c7c6 b2b3","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2P5/1P3N2/P2PPPPP/RNBQKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Bogoljubow Variation","pgn":"1. Nf3 d5 2. c4 c6 3. b3 Bg4","uci":"g1f3 d7d5 c2c4 c7c6 b2b3 c8g4","epd":"rn1qkbnr/pp2pppp/2p5/3p4/2P3b1/1P3N2/P2PPPPP/RNBQKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Bogoljubow Variation","pgn":"1. Nf3 d5 2. c4 c6 3. b3 Bf5","uci":"g1f3 d7d5 c2c4 c7c6 b2b3 c8f5","epd":"rn1qkbnr/pp2pppp/2p5/3p1b2/2P5/1P3N2/P2PPPPP/RNBQKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Bogoljubow Variation","pgn":"1. Nf3 d5 2. c4 c6 3. b3 Bf5 4. Bb2","uci":"g1f3 d7d5 c2c4 c7c6 b2b3 c8f5 c1b2","epd":"rn1qkbnr/pp2pppp/2p5/3p1b2/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Capablanca Variation","pgn":"1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4","uci":"c2c4 g8f6 g1f3 c7c6 b2b3 d7d5 c1b2 c8g4","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Capablanca Variation","pgn":"1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4 5. e3","uci":"c2c4 g8f6 g1f3 c7c6 b2b3 d7d5 c1b2 c8g4 e2e3","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Capablanca Variation","pgn":"1. c4 Nf6 2. Nf3 c6 3. b3 d5 4. Bb2 Bg4 5. d3","uci":"c2c4 g8f6 g1f3 c7c6 b2b3 d7d5 c1b2 c8g4 d2d3","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P1P1N2/PB2PPPP/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, London Defensive System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, London Defensive System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8f5 f1g2","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPPBP/RNBQK2R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, London Defensive System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bg2 e6 6. Bb2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8f5 f1g2 e7e6 c1b2","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p1b2/2P5/1P3NP1/PB1PPPBP/RN1QK2R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, London Defensive System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bf5 5. Bb2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8f5 c1b2","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/PB1PPP1P/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, New York System","pgn":"1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5","uci":"g1f3 g8f6 c2c4 c7c6 b2b3 d7d5 c1b2 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, New York System","pgn":"1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5 5. e3","uci":"g1f3 g8f6 c2c4 c7c6 b2b3 d7d5 c1b2 c8f5 e2e3","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, New York System","pgn":"1. Nf3 Nf6 2. c4 c6 3. b3 d5 4. Bb2 Bf5 5. d3","uci":"g1f3 g8f6 c2c4 c7c6 b2b3 d7d5 c1b2 c8f5 d2d3","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P1P1N2/PB2PPPP/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Torre System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8g4","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Torre System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4 5. Bg2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8g4 f1g2","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/P2PPPBP/RNBQK2R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Torre System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4 5. Bg2 e6 6. Bb2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8g4 f1g2 e7e6 c1b2","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p4/2P3b1/1P3NP1/PB1PPPBP/RN1QK2R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, Torre System","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 Bg4 5. Bb2","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 c8g4 c1b2","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/PB1PPP1P/RN1QKB1R b KQkq -"},{"eco":"A12","name":"Réti Opening: Anglo-Slav Variation, with dxc4","pgn":"1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3 dxc4","uci":"c2c4 g8f6 g2g3 c7c6 g1f3 d7d5 b2b3 d5c4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2p5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense","pgn":"1. c4 e6","uci":"c2c4 e7e6","epd":"rnbqkbnr/pppp1ppp/4p3/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense","pgn":"1. c4 e6 2. Nf3","uci":"c2c4 e7e6 g1f3","epd":"rnbqkbnr/pppp1ppp/4p3/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense","pgn":"1. c4 e6 2. Nf3 d5","uci":"c2c4 e7e6 g1f3 d7d5","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense","pgn":"1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Be7 5. e3 O-O","uci":"c2c4 e7e6 g1f3 d7d5 b2b3 g8f6 c1b2 f8e7 e2e3 e8g8","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2P5/1P2PN2/PB1P1PPP/RN1QKB1R w KQ -"},{"eco":"A13","name":"English Opening: Agincourt Defense","pgn":"1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Be7 5. e3 O-O 6. d4","uci":"c2c4 e7e6 g1f3 d7d5 b2b3 g8f6 c1b2 f8e7 e2e3 e8g8 d2d4","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/1P2PN2/PB3PPP/RN1QKB1R b KQ -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Bogoljubow Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Bd6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8d6","epd":"rnbqk2r/ppp2ppp/3bpn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Catalan Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 b6 4. Bg2 Bb7 5. O-O","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 b7b6 f1g2 c8b7 e1g1","epd":"rn1qkbnr/pbp2ppp/1p2p3/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Catalan Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 c5","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 c7c5","epd":"rnbqkbnr/pp3ppp/4p3/2pp4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Catalan Defense Accepted","pgn":"1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4","uci":"c2c4 e7e6 g1f3 g8f6 g2g3 d7d5 f1g2 d5c4","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2p5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense","pgn":"1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. Bg2 c6","uci":"c2c4 e7e6 g1f3 g8f6 g2g3 d7d5 f1g2 c7c6","epd":"rnbqkb1r/pp3ppp/2p1pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Kurajica Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 c6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 c7c6","epd":"rnbqkbnr/pp3ppp/2p1p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Tarrasch Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 c5 5. b3 Nc6 6. O-O Be7","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 c7c5 b2b3 b8c6 e1g1 f8e7","epd":"r1bqk2r/pp2bppp/2n1pn2/2pp4/2P5/1P3NP1/P2PPPBP/RNBQ1RK1 w kq -"},{"eco":"A13","name":"English Opening: Agincourt Defense, Wimpy System","pgn":"1. c4 e6 2. Nf3 Nf6 3. b3 d5 4. Bb2 c5 5. e3","uci":"c2c4 e7e6 g1f3 g8f6 b2b3 d7d5 c1b2 c7c5 e2e3","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/2P5/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq -"},{"eco":"A13","name":"English Opening: Neo-Catalan","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A13","name":"English Opening: Neo-Catalan Declined","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A13","name":"English Opening: Romanishin Gambit","pgn":"1. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5","uci":"c2c4 g8f6 g1f3 e7e6 g2g3 a7a6 f1g2 b7b5","epd":"rnbqkb1r/2pp1ppp/p3pn2/1p6/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Keres Defense","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O c5 6. cxd5 Nxd5 7. Nc3 Nc6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1 c7c5 c4d5 f6d5 b1c3 b8c6","epd":"r1bqk2r/pp2bppp/2n1p3/2pn4/8/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. b3","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 b2b3","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2P5/1P3NP1/P2PPPBP/RNBQ1RK1 b - -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. b3 c5","uci":"g1f3 d7d5 g2g3 g8f6 f1g2 e7e6 e1g1 f8e7 c2c4 e8g8 b2b3 c7c5","epd":"rnbq1rk1/pp2bppp/4pn2/2pp4/2P5/1P3NP1/P2PPPBP/RNBQ1RK1 w - -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. b3 c5 7. e3","uci":"g1f3 d7d5 g2g3 g8f6 f1g2 e7e6 e1g1 f8e7 c2c4 e8g8 b2b3 c7c5 e2e3","epd":"rnbq1rk1/pp2bppp/4pn2/2pp4/2P5/1P2PNP1/P2P1PBP/RNBQ1RK1 b - -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. b3 c5 7. e3 d4","uci":"g1f3 d7d5 g2g3 g8f6 f1g2 e7e6 e1g1 f8e7 c2c4 e8g8 b2b3 c7c5 e2e3 d5d4","epd":"rnbq1rk1/pp2bppp/4pn2/2p5/2Pp4/1P2PNP1/P2P1PBP/RNBQ1RK1 w - -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined","pgn":"1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. b3 c5 7. e3 Nc6","uci":"g1f3 d7d5 g2g3 g8f6 f1g2 e7e6 e1g1 f8e7 c2c4 e8g8 b2b3 c7c5 e2e3 b8c6","epd":"r1bq1rk1/pp2bppp/2n1pn2/2pp4/2P5/1P2PNP1/P2P1PBP/RNBQ1RK1 w - -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. b3","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 b2b3","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/2P5/1P3NP1/P2PPPBP/RNBQK2R b KQkq -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. b3 b6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 b2b3 b7b6","epd":"rnbqk2r/p1p1bppp/1p2pn2/3p4/2P5/1P3NP1/P2PPPBP/RNBQK2R w KQkq -"},{"eco":"A14","name":"English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. b3 c5","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 b2b3 c7c5","epd":"rnbqk2r/pp2bppp/4pn2/2pp4/2P5/1P3NP1/P2PPPBP/RNBQK2R w KQkq -"},{"eco":"A14","name":"Réti Opening: Anglo-Slav Variation","pgn":"1. Nf3 d5 2. c4 c6 3. g3 Nf6 4. Bg2 e6 5. b3 Be7 6. Bb2","uci":"g1f3 d7d5 c2c4 c7c6 g2g3 g8f6 f1g2 e7e6 b2b3 f8e7 c1b2","epd":"rnbqk2r/pp2bppp/2p1pn2/3p4/2P5/1P3NP1/PB1PPPBP/RN1QK2R b KQkq -"},{"eco":"A14","name":"Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line","pgn":"1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. b3 c6 7. Bb2","uci":"g1f3 d7d5 c2c4 e7e6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 b2b3 c7c6 c1b2","epd":"rnbq1rk1/pp2bppp/2p1pn2/3p4/2P5/1P3NP1/PB1PPPBP/RN1Q1RK1 b - -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense","pgn":"1. c4 Nf6","uci":"c2c4 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld","pgn":"1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. e4","uci":"c2c4 g8f6 b1c3 g7g6 g1f3 f8g7 e2e4","epd":"rnbqk2r/ppppppbp/5np1/8/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Grünfeld Formation","pgn":"1. c4 Nf6 2. Nf3 g6 3. g3 d5","uci":"c2c4 g8f6 g1f3 g7g6 g2g3 d7d5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, King's Indian Formation","pgn":"1. c4 Nf6 2. Nf3 g6","uci":"c2c4 g8f6 g1f3 g7g6","epd":"rnbqkb1r/pppppp1p/5np1/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto","pgn":"1. c4 Nf6 2. Nf3 g6 3. g3 b6 4. Bg2 Bb7","uci":"c2c4 g8f6 g1f3 g7g6 g2g3 b7b6 f1g2 c8b7","epd":"rn1qkb1r/pbpppp1p/1p3np1/8/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, King's Knight Variation","pgn":"1. c4 Nf6 2. Nf3","uci":"c2c4 g8f6 g1f3","epd":"rnbqkb1r/pppppppp/5n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Old Indian Formation","pgn":"1. c4 Nf6 2. Nf3 d6","uci":"c2c4 g8f6 g1f3 d7d6","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Queen's Indian Formation","pgn":"1. c4 Nf6 2. Nf3 b6","uci":"c2c4 g8f6 g1f3 b7b6","epd":"rnbqkb1r/p1pppppp/1p3n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Queen's Indian Formation","pgn":"1. c4 e6 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7","uci":"c2c4 e7e6 g1f3 g8f6 g2g3 b7b6 f1g2 c8b7","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Romanishin Variation","pgn":"1. c4 e6 2. Nf3 Nf6 3. g3 a6","uci":"c2c4 e7e6 g1f3 g8f6 g2g3 a7a6","epd":"rnbqkb1r/1ppp1ppp/p3pn2/8/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Scandinavian Defense","pgn":"1. c4 Nf6 2. Nf3 d5","uci":"c2c4 g8f6 g1f3 d7d5","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation","pgn":"1. c4 Nf6 2. Nf3 d5 3. cxd5 Nxd5","uci":"c2c4 g8f6 g1f3 d7d5 c4d5 f6d5","epd":"rnbqkb1r/ppp1pppp/8/3n4/8/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Opening: Anglo-Indian Defense, Slav Formation","pgn":"1. c4 Nf6 2. Nf3 g6 3. g3 c6","uci":"c2c4 g8f6 g1f3 g7g6 g2g3 c7c6","epd":"rnbqkb1r/pp1ppp1p/2p2np1/8/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -"},{"eco":"A15","name":"English Orangutan","pgn":"1. c4 Nf6 2. b4","uci":"c2c4 g8f6 b2b4","epd":"rnbqkb1r/pppppppp/5n2/8/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -"},{"eco":"A15","name":"English Orangutan","pgn":"1. c4 Nf6 2. Nf3 g6 3. b4","uci":"c2c4 g8f6 g1f3 g7g6 b2b4","epd":"rnbqkb1r/pppppp1p/5np1/8/1PP5/5N2/P2PPPPP/RNBQKB1R b KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Grünfeld Defense","pgn":"1. c4 Nf6 2. Nc3 d5","uci":"c2c4 g8f6 b1c3 d7d5","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Grünfeld Defense, Korchnoi Variation","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 g7g6 g2g3 f8g7 f1g2 e7e5","epd":"rnbqk2r/ppp2pbp/6p1/3np3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3","epd":"rnbqkb1r/ppp1pppp/8/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 g7g6","epd":"rnbqkb1r/ppp1pp1p/6p1/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5b6","epd":"rnbqkb1r/ppp1pp1p/1n4p1/8/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nxc3","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 g7g6 f1g2 d5c3","epd":"rnbqkb1r/ppp1pp1p/6p1/8/8/2n3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A16","name":"English Opening: Anglo-Indian Defense, Queen's Knight Variation","pgn":"1. c4 Nf6 2. Nc3","uci":"c2c4 g8f6 b1c3","epd":"rnbqkb1r/pppppppp/5n2/8/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense","pgn":"1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e3 e6","uci":"c2c4 g8f6 b1c3 d7d5 c4d5 f6d5 g1f3 c7c5 e2e3 e7e6","epd":"rnbqkb1r/pp3ppp/4p3/2pn4/8/2N1PN2/PP1P1PPP/R1BQKB1R w KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense, Hedgehog System","pgn":"1. c4 Nf6 2. Nc3 e6","uci":"c2c4 g8f6 b1c3 e7e6","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense, Nimzo-English","pgn":"1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4","uci":"c2c4 g8f6 b1c3 e7e6 g1f3 f8b4","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bP5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense, Queen's Indian Formation","pgn":"1. c4 e6 2. Nc3 Nf6 3. Nf3 b6","uci":"c2c4 e7e6 b1c3 g8f6 g1f3 b7b6","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense, Queen's Indian Variation","pgn":"1. c4 e6 2. Nc3 Nf6 3. Nf3 b6 4. e4 Bb7 5. Bd3","uci":"c2c4 e7e6 b1c3 g8f6 g1f3 b7b6 e2e4 c8b7 f1d3","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2P1P3/2NB1N2/PP1P1PPP/R1BQK2R b KQkq -"},{"eco":"A17","name":"English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack","pgn":"1. c4 e6 2. Nc3 Nf6 3. Nf3 Bb4 4. g4","uci":"c2c4 e7e6 b1c3 g8f6 g1f3 f8b4 g2g4","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bP3P1/2N2N2/PP1PPP1P/R1BQKB1R b KQkq -"},{"eco":"A18","name":"English Opening: Mikenas-Carls Variation","pgn":"1. c4 e6 2. Nc3 Nf6 3. e4","uci":"c2c4 e7e6 b1c3 g8f6 e2e4","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -"},{"eco":"A18","name":"English Opening: Mikenas-Carls Variation","pgn":"1. c4 e6 2. Nc3 Nf6 3. e4 Nc6","uci":"c2c4 e7e6 b1c3 g8f6 e2e4 b8c6","epd":"r1bqkb1r/pppp1ppp/2n1pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -"},{"eco":"A18","name":"English Opening: Mikenas-Carls Variation","pgn":"1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. e5","uci":"c2c4 e7e6 b1c3 g8f6 e2e4 d7d5 e4e5","epd":"rnbqkb1r/ppp2ppp/4pn2/3pP3/2P5/2N5/PP1P1PPP/R1BQKBNR b KQkq -"},{"eco":"A19","name":"English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit","pgn":"1. c4 e6 2. Nc3 Nf6 3. e4 c5 4. e5 Ng8","uci":"c2c4 e7e6 b1c3 g8f6 e2e4 c7c5 e4e5 f6g8","epd":"rnbqkbnr/pp1p1ppp/4p3/2p1P3/2P5/2N5/PP1P1PPP/R1BQKBNR w KQkq -"},{"eco":"A19","name":"English Opening: Mikenas-Carls, Sicilian","pgn":"1. c4 e6 2. Nc3 Nf6 3. e4 c5","uci":"c2c4 e7e6 b1c3 g8f6 e2e4 c7c5","epd":"rnbqkb1r/pp1p1ppp/4pn2/2p5/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -"},{"eco":"A20","name":"English Opening: Drill Variation","pgn":"1. c4 e5 2. g3 h5","uci":"c2c4 e7e5 g2g3 h7h5","epd":"rnbqkbnr/pppp1pp1/8/4p2p/2P5/6P1/PP1PPP1P/RNBQKBNR w KQkq -"},{"eco":"A20","name":"English Opening: King's English Variation","pgn":"1. c4 e5","uci":"c2c4 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A20","name":"English Opening: King's English Variation, Kahiko-Hula Gambit","pgn":"1. c4 e5 2. e3 Nf6 3. f4 exf4 4. Nf3","uci":"c2c4 e7e5 e2e3 g8f6 f2f4 e5f4 g1f3","epd":"rnbqkb1r/pppp1ppp/5n2/8/2P2p2/4PN2/PP1P2PP/RNBQKB1R b KQkq -"},{"eco":"A20","name":"English Opening: King's English Variation, Nimzowitsch Variation","pgn":"1. c4 e5 2. Nf3","uci":"c2c4 e7e5 g1f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -"},{"eco":"A20","name":"English Opening: King's English Variation, Nimzowitsch-Flohr Variation","pgn":"1. c4 e5 2. Nf3 e4","uci":"c2c4 e7e5 g1f3 e5e4","epd":"rnbqkbnr/pppp1ppp/8/8/2P1p3/5N2/PP1PPPPP/RNBQKB1R w KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation","pgn":"1. c4 e5 2. Nc3 d6 3. Nf3","uci":"c2c4 e7e5 b1c3 d7d6 g1f3","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation, Keres Defense","pgn":"1. c4 e5 2. Nc3 d6 3. g3 c6","uci":"c2c4 e7e5 b1c3 d7d6 g2g3 c7c6","epd":"rnbqkbnr/pp3ppp/2pp4/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation, Kramnik-Shirov Counterattack","pgn":"1. c4 e5 2. Nc3 Bb4","uci":"c2c4 e7e5 b1c3 f8b4","epd":"rnbqk1nr/pppp1ppp/8/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation, Reversed Sicilian","pgn":"1. c4 e5 2. Nc3","uci":"c2c4 e7e5 b1c3","epd":"rnbqkbnr/pppp1ppp/8/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation, Smyslov Defense","pgn":"1. c4 e5 2. Nc3 d6 3. Nf3 Bg4","uci":"c2c4 e7e5 b1c3 d7d6 g1f3 c8g4","epd":"rn1qkbnr/ppp2ppp/3p4/4p3/2P3b1/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A21","name":"English Opening: King's English Variation, Troger Defense","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Be6","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 d7d6 f1g2 c8e6","epd":"r2qkbnr/ppp2ppp/2npb3/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A22","name":"English Opening: Carls-Bremen System","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3","uci":"c2c4 e7e5 b1c3 g8f6 g2g3","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -"},{"eco":"A22","name":"English Opening: King's English Variation, Adhiban Gambit","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 c6","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 c7c6","epd":"rnbqkb1r/pp1p1ppp/2p2n2/6N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A22","name":"English Opening: King's English Variation, Bellon Gambit","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 b5","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 b7b5","epd":"rnbqkb1r/p1pp1ppp/5n2/1p4N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A22","name":"English Opening: King's English Variation, Two Knights Variation","pgn":"1. c4 e5 2. Nc3 Nf6","uci":"c2c4 e7e5 b1c3 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A22","name":"English Opening: King's English Variation, Two Knights Variation, Reversed Dragon","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 d5","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 d7d5","epd":"rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -"},{"eco":"A22","name":"English Opening: King's English Variation, Two Knights Variation, Smyslov System","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 Bb4","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 f8b4","epd":"rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -"},{"eco":"A22","name":"English Opening: King's English, Erbenheimer Gambit","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 e4 4. Ng5 Ng4","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 e5e4 f3g5 f6g4","epd":"rnbqkb1r/pppp1ppp/8/6N1/2P1p1n1/2N5/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A22","name":"English Opening: King's English, Mazedonisch","pgn":"1. c4 e5 2. Nc3 Nf6 3. f4","uci":"c2c4 e7e5 b1c3 g8f6 f2f4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2P2P2/2N5/PP1PP1PP/R1BQKBNR b KQkq -"},{"eco":"A23","name":"English Opening: King's English Variation, Two Knights Variation, Keres Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 c6","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 c7c6","epd":"rnbqkb1r/pp1p1ppp/2p2n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -"},{"eco":"A23","name":"English Opening: King's English Variation, Two Knights Variation, Keres Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 c6","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 f8c5 f1g2 c7c6","epd":"rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A24","name":"English Opening: King's English Variation, Two Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 g6","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 g7g6","epd":"rnbqkb1r/pppp1p1p/5np1/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -"},{"eco":"A25","name":"English Opening: Closed, Taimanov Variation","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Rb1 Nh6 5. Bg2 Bg7","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 a1b1 g8h6 f1g2 f8g7","epd":"r1bqk2r/pppp1pbp/2n3pn/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR w Kkq -"},{"eco":"A25","name":"English Opening: Closed, Taimanov Variation","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 g8h6","epd":"r1bqk2r/ppp2pbp/2np2pn/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Bremen-Hort Variation","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 d7d6 g1e2 c8e6","epd":"r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Closed System","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3","epd":"r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Hungarian Attack","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 a1b1","epd":"r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR b Kkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Reversed Closed Sicilian","pgn":"1. c4 e5 2. Nc3 Nc6","uci":"c2c4 e7e5 b1c3 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Reversed Closed Sicilian","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. Nd5","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 b8c6 b1c3 f8b4 c3d5","epd":"r1bqk2r/pppp1ppp/2n2n2/3Np3/1bP5/6P1/PP1PPPBP/R1BQK1NR b KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Reversed Closed Sicilian","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. e4 d6 6. Nge2","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 b8c6 b1c3 f8b4 e2e4 d7d6 g1e2","epd":"r1bqk2r/ppp2ppp/2np1n2/4p3/1bP1P3/2N3P1/PP1PNPBP/R1BQK2R b KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Reversed Closed Sicilian","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. e4 d6 6. Nge2 Bg4","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 b8c6 b1c3 f8b4 e2e4 d7d6 g1e2 c8g4","epd":"r2qk2r/ppp2ppp/2np1n2/4p3/1bP1P1b1/2N3P1/PP1PNPBP/R1BQK2R w KQkq -"},{"eco":"A25","name":"English Opening: King's English Variation, Reversed Closed Sicilian","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. e4 O-O 5. Nge2 Nc6 6. Bg2","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 f8b4 e2e4 e8g8 g1e2 b8c6 f1g2","epd":"r1bq1rk1/pppp1ppp/2n2n2/4p3/1bP1P3/2N3P1/PP1PNPBP/R1BQK2R b KQ -"},{"eco":"A25","name":"English Opening: King's English Variation, Taimanov Variation","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7","epd":"r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A26","name":"English Opening: King's English Variation, Botvinnik System","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 e2e4","epd":"r1bqk1nr/ppp2pbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -"},{"eco":"A26","name":"English Opening: King's English Variation, Closed System, Full Symmetry","pgn":"1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6","uci":"c2c4 e7e5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6","epd":"r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -"},{"eco":"A27","name":"English Opening: King's English Variation, Three Knights System","pgn":"1. c4 e5 2. Nc3 Nc6 3. Nf3","uci":"c2c4 e7e5 b1c3 b8c6 g1f3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -"},{"eco":"A28","name":"English Opening: Four Knights System, Nimzowitsch Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e4","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6 7. Bh4 Bxc3+ 8. bxc3 Ne5","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d4 e5d4 f3d4 f8b4 c1g5 h7h6 g5h4 b4c3 b2c3 c6e5","epd":"r1bqk2r/pppp1pp1/5n1p/4n3/2PN3B/2P5/P3PPPP/R2QKB1R w KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Bradley Beach Variation","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d4 e4","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d4 e5e4","epd":"r1bqkb1r/pppp1ppp/2n2n2/8/2PPp3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Flexible Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. d3","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 d2d3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2NP1N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Korchnoi Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. a3","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 a2a3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/P1N2N2/1P1PPPPP/R1BQKB1R b KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Quiet Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Quiet Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3 f8b4 d1c2 b4c3","epd":"r1bqk2r/pppp1ppp/2n2n2/4p3/2P5/2b1PN2/PPQP1PPP/R1B1KB1R w KQkq -"},{"eco":"A28","name":"English Opening: King's English Variation, Four Knights Variation, Quiet Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 e2e3 f8b4 d1c2 e8g8 c3d5 f8e8 c2f5","epd":"r1bqr1k1/pppp1ppp/2n2n2/3NpQ2/1bP5/4PN2/PP1P1PPP/R1B1KB1R b KQ -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2NP1/PP1PPP1P/R1BQKB1R b KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8b4","epd":"r1bqk2r/pppp1ppp/2n2n2/4p3/1bP5/2N2NP1/PP1PPP1P/R1BQKB1R w KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 Bxc3 6. dxc3 d6 7. O-O O-O","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8b4 f1g2 b4c3 d2c3 d7d6 e1g1 e8g8","epd":"r1bq1rk1/ppp2ppp/2np1n2/4p3/2P5/2P2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6","epd":"r1bqkb1r/ppp2ppp/2n5/3np3/8/5NP1/PP1PPPBP/RNBQK2R w KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6 d2d3","epd":"r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line","pgn":"1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. d3 Be7 7. O-O O-O","uci":"c2c4 e7e5 g2g3 g8f6 f1g2 d7d5 c4d5 f6d5 g1f3 b8c6 d2d3 f8e7 e1g1 e8g8","epd":"r1bq1rk1/ppp1bppp/2n5/3np3/8/3P1NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, Delayed .. Nc6","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. Bg2 O-O 5. Nf3 Re8 6. O-O e4 7. Nd4 Nc6","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 f8b4 f1g2 e8g8 g1f3 f8e8 e1g1 e5e4 f3d4 b8c6","epd":"r1bqr1k1/pppp1ppp/2n2n2/8/1bPNp3/2N3P1/PP1PPPBP/R1BQ1RK1 w - -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bc5 5. d3 d6 6. Bg2","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8c5 d2d3 d7d6 f1g2","epd":"r1bqk2r/ppp2ppp/2np1n2/2b1p3/2P5/2NP1NP1/PP2PPBP/R1BQK2R b KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bc5 5. d3 d6 6. Bg2 O-O 7. O-O","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8c5 d2d3 d7d6 f1g2 e8g8 e1g1","epd":"r1bq1rk1/ppp2ppp/2np1n2/2b1p3/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, Be7","pgn":"1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 d6 5. d3 Be7 6. Nf3 O-O","uci":"c2c4 e7e5 b1c3 g8f6 g2g3 b8c6 f1g2 d7d6 d2d3 f8e7 g1f3 e8g8","epd":"r1bq1rk1/ppp1bppp/2np1n2/4p3/2P5/2NP1NP1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, a6","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bc5 5. d3 d6 6. Bg2 a6","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8c5 d2d3 d7d6 f1g2 a7a6","epd":"r1bqk2r/1pp2ppp/p1np1n2/2b1p3/2P5/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, h6","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bc5 5. d3 d6 6. Bg2 h6","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 f8c5 d2d3 d7d6 f1g2 h7h6","epd":"r1bqk2r/ppp2pp1/2np1n1p/2b1p3/2P5/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Bc5","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Bc5","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 d7d5 c4d5 f6d5 f1g2 f8c5","epd":"r1bqk2r/ppp2ppp/2n5/2bnp3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A29","name":"English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6","pgn":"1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Nb6","uci":"c2c4 e7e5 b1c3 g8f6 g1f3 b8c6 g2g3 d7d5 c4d5 f6d5 f1g2 d5b6","epd":"r1bqkb1r/ppp2ppp/1nn5/4p3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A30","name":"English Opening: Symmetrical Variation","pgn":"1. c4 c5","uci":"c2c4 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -"},{"eco":"A30","name":"English Opening: Symmetrical Variation","pgn":"1. c4 c5 2. Nf3","uci":"c2c4 c7c5 g1f3","epd":"rnbqkbnr/pp1ppppp/8/2p5/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -"},{"eco":"A30","name":"English Opening: Symmetrical Variation, Hedgehog Defense","pgn":"1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. g3 b6 5. Bg2 Bb7 6. O-O Be7","uci":"c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 g2g3 b7b6 f1g2 c8b7 e1g1 f8e7","epd":"rn1qk2r/pb1pbppp/1p2pn2/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -"},{"eco":"A30","name":"English Opening: Symmetrical Variation, Napolitano Gambit","pgn":"1. c4 c5 2. Nf3 Nf6 3. b4","uci":"c2c4 c7c5 g1f3 g8f6 b2b4","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/1PP5/5N2/P2PPPPP/RNBQKB1R b KQkq -"},{"eco":"A30","name":"English Opening: Symmetrical, Hedgehog, Flexible Formation","pgn":"1. c4 e6 2. Nf3 c5 3. Nc3 Nf6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 a6 10. b3 Nbd7","uci":"c2c4 e7e6 g1f3 c7c5 b1c3 g8f6 g2g3 b7b6 f1g2 c8b7 e1g1 f8e7 d2d4 c5d4 d1d4 d7d6 f1d1 a7a6 b2b3 b8d7","epd":"r2qk2r/1b1nbppp/pp1ppn2/8/2PQ4/1PN2NP1/P3PPBP/R1BR2K1 w kq -"},{"eco":"A30","name":"English Opening: Wing Gambit","pgn":"1. c4 c5 2. b4","uci":"c2c4 c7c5 b2b4","epd":"rnbqkbnr/pp1ppppp/8/2p5/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -"},{"eco":"A31","name":"English Opening: Symmetrical Variation, Anti-Benoni Variation","pgn":"1. c4 Nf6 2. d4 c5 3. Nf3","uci":"c2c4 g8f6 d2d4 c7c5 g1f3","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"A31","name":"English Opening: Symmetrical Variation, Anti-Benoni Variation, Kasparov-Vaganian Gambit","pgn":"1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nb5 d5","uci":"d2d4 g8f6 c2c4 c7c5 g1f3 c5d4 f3d4 e7e5 d4b5 d7d5","epd":"rnbqkb1r/pp3ppp/5n2/1N1pp3/2P5/8/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A32","name":"English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense","pgn":"1. c4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 Nf6","uci":"c2c4 e7e6 d2d4 c7c5 g1f3 c5d4 f3d4 g8f6","epd":"rnbqkb1r/pp1p1ppp/4pn2/8/2PN4/8/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A33","name":"English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation","pgn":"1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 Nc6 5. g3 cxd4 6. Nxd4 Qb6","uci":"c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 d2d4 b8c6 g2g3 c5d4 f3d4 d8b6","epd":"r1b1kb1r/pp1p1ppp/1qn1pn2/8/2PN4/2N3P1/PP2PP1P/R1BQKB1R w KQkq -"},{"eco":"A33","name":"English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense","pgn":"1. c4 e6 2. Nf3 Nf6 3. Nc3 c5 4. d4 cxd4 5. Nxd4 Nc6","uci":"c2c4 e7e6 g1f3 g8f6 b1c3 c7c5 d2d4 c5d4 f3d4 b8c6","epd":"r1bqkb1r/pp1p1ppp/2n1pn2/8/2PN4/2N5/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation","pgn":"1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 cxd4","uci":"c2c4 c7c5 g1f3 g8f6 b1c3 b8c6 g2g3 d7d5 d2d4 c5d4","epd":"r1bqkb1r/pp2pppp/2n2n2/3p4/2Pp4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation, Fianchetto Variation","pgn":"1. c4 Nf6 2. Nc3 c5 3. g3","uci":"c2c4 g8f6 b1c3 c7c5 g2g3","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation, Normal Variation","pgn":"1. c4 c5 2. Nc3","uci":"c2c4 c7c5 b1c3","epd":"rnbqkbnr/pp1ppppp/8/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation, Rubinstein Variation","pgn":"1. c4 Nf6 2. Nc3 c5 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nc7","uci":"c2c4 g8f6 b1c3 c7c5 g2g3 d7d5 c4d5 f6d5 f1g2 d5c7","epd":"rnbqkb1r/ppn1pppp/8/2p5/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation, Rubinstein Variation","pgn":"1. c4 c5 2. Nf3 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. g3 Nc6 6. Bg2 Nc7","uci":"c2c4 c7c5 g1f3 g8f6 b1c3 d7d5 c4d5 f6d5 g2g3 b8c6 f1g2 d5c7","epd":"r1bqkb1r/ppn1pppp/2n5/2p5/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A34","name":"English Opening: Symmetrical Variation, Three Knights Variation","pgn":"1. c4 c5 2. Nc3 Nf6 3. Nf3","uci":"c2c4 c7c5 b1c3 g8f6 g1f3","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -"},{"eco":"A35","name":"English Opening: Symmetrical Variation","pgn":"1. c4 c5 2. Nc3 Nf6 3. Nf3 e5","uci":"c2c4 c7c5 b1c3 g8f6 g1f3 e7e5","epd":"rnbqkb1r/pp1p1ppp/5n2/2p1p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A35","name":"English Opening: Symmetrical Variation, Four Knights Variation","pgn":"1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6","uci":"c2c4 c7c5 g1f3 g8f6 b1c3 b8c6","epd":"r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -"},{"eco":"A35","name":"English Opening: Symmetrical Variation, Four Knights Variation, Keres-Parma System","pgn":"1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 e6","uci":"c2c4 c7c5 g1f3 g8f6 b1c3 b8c6 g2g3 e7e6","epd":"r1bqkb1r/pp1p1ppp/2n1pn2/2p5/2P5/2N2NP1/PP1PPP1P/R1BQKB1R w KQkq -"},{"eco":"A35","name":"English Opening: Symmetrical Variation, Two Knights Variation","pgn":"1. c4 c5 2. Nc3 Nc6","uci":"c2c4 c7c5 b1c3 b8c6","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -"},{"eco":"A36","name":"English Opening: Symmetrical Variation, Botvinnik System","pgn":"1. c4 c5 2. e4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2","uci":"c2c4 c7c5 e2e4 b8c6 b1c3 g7g6 g2g3 f8g7 f1g2","epd":"r1bqk1nr/pp1pppbp/2n3p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -"},{"eco":"A36","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 e5","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e2e3 e7e5","epd":"r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq -"},{"eco":"A36","name":"English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3","uci":"c2c4 c7c5 b1c3 b8c6 g2g3","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -"},{"eco":"A36","name":"English Opening: Symmetrical Variation, Ultra-Symmetrical Variation","pgn":"1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6","uci":"c2c4 c7c5 g2g3 g7g6 f1g2 f8g7 b1c3 b8c6","epd":"r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5","epd":"r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O d6","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5 e1g1 d7d6","epd":"r1bqk1nr/pp3pbp/2np2p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5 e1g1 g8e7","epd":"r1bqk2r/pp1pnpbp/2n3p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7 7. a3","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5 e1g1 g8e7 a2a3","epd":"r1bqk2r/pp1pnpbp/2n3p1/2p1p3/2P5/P1N2NP1/1P1PPPBP/R1BQ1RK1 b kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7 7. d3","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5 e1g1 g8e7 d2d3","epd":"r1bqk2r/pp1pnpbp/2n3p1/2p1p3/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 e5 6. O-O Nge7 7. d3 d6","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 e7e5 e1g1 g8e7 d2d3 d7d6","epd":"r1bqk2r/pp2npbp/2np2p1/2p1p3/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 w kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3","epd":"r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation","pgn":"1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O d6 6. Nc3","uci":"c2c4 c7c5 g1f3 b8c6 g2g3 g7g6 f1g2 f8g7 e1g1 d7d6 b1c3","epd":"r1bqk1nr/pp2ppbp/2np2p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 b kq -"},{"eco":"A37","name":"English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation","pgn":"1. c4 c5 2. Nf3 Nc6 3. g3 g6 4. Bg2 Bg7 5. O-O e6 6. Nc3","uci":"c2c4 c7c5 g1f3 b8c6 g2g3 g7g6 f1g2 f8g7 e1g1 e7e6 b1c3","epd":"r1bqk1nr/pp1p1pbp/2n1p1p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 b kq -"},{"eco":"A38","name":"English Opening: Symmetrical Variation, Double Fianchetto","pgn":"1. c4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nf6 6. O-O O-O 7. b3","uci":"c2c4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 g1f3 g8f6 e1g1 e8g8 b2b3","epd":"r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1PN2NP1/P2PPPBP/R1BQ1RK1 b - -"},{"eco":"A38","name":"English Opening: Symmetrical Variation, Duchamp Variation","pgn":"1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O c5 6. Nc3 Nc6 7. d3","uci":"c2c4 g8f6 g1f3 g7g6 g2g3 f8g7 f1g2 e8g8 e1g1 c7c5 b1c3 b8c6 d2d3","epd":"r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"A38","name":"English Opening: Symmetrical Variation, Full Symmetry Line","pgn":"1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7","uci":"c2c4 g8f6 g1f3 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7","epd":"r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -"},{"eco":"A39","name":"English Opening: Symmetrical Variation, Mecking Variation","pgn":"1. c4 Nf6 2. Nf3 c5 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O O-O 7. d4","uci":"c2c4 g8f6 g1f3 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 e1g1 e8g8 d2d4","epd":"r1bq1rk1/pp1pppbp/2n2np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"A40","name":"Australian Defense","pgn":"1. d4 Na6","uci":"d2d4 b8a6","epd":"r1bqkbnr/pppppppp/n7/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Benoni Defense: Franco-Sicilian Hybrid","pgn":"1. d4 e6 2. c4 c5 3. d5 exd5 4. cxd5 d6 5. Nc3 g6 6. e4 Bg7 7. Nf3 Ne7","uci":"d2d4 e7e6 c2c4 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 g1f3 g8e7","epd":"rnbqk2r/pp2npbp/3p2p1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"A40","name":"Borg Defense: Borg Gambit","pgn":"1. d4 g5","uci":"d2d4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Colle System: Pterodactyl Variation","pgn":"1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+","uci":"d2d4 g7g6 g1f3 f8g7 e2e3 c7c5 f1d3 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"A40","name":"Colle System: Siroccopteryx Variation","pgn":"1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+","uci":"d2d4 g7g6 g1f3 f8g7 e2e3 c7c5 f1d3 c5d4 f3d4 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q7/3N4/3BP3/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"A40","name":"English Defense","pgn":"1. d4 b6","uci":"d2d4 b7b6","epd":"rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"English Defense","pgn":"1. d4 e6 2. c4 b6","uci":"d2d4 e7e6 c2c4 b7b6","epd":"rnbqkbnr/p1pp1ppp/1p2p3/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"English Defense: Eastbourne Gambit","pgn":"1. d4 b6 2. c4 Bb7 3. Nc3 e5","uci":"d2d4 b7b6 c2c4 c8b7 b1c3 e7e5","epd":"rn1qkbnr/pbpp1ppp/1p6/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"English Defense: Hartlaub Gambit Accepted","pgn":"1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. exf5 Nf6","uci":"c2c4 e7e6 d2d4 b7b6 b1c3 c8b7 e2e4 f7f5 e4f5 g8f6","epd":"rn1qkb1r/pbpp2pp/1p2pn2/5P2/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"English Defense: Hartlaub Gambit Declined","pgn":"1. c4 e6 2. d4 b6 3. Nc3 Bb7 4. e4 f5 5. d5","uci":"c2c4 e7e6 d2d4 b7b6 b1c3 c8b7 e2e4 f7f5 d4d5","epd":"rn1qkbnr/pbpp2pp/1p2p3/3P1p2/2P1P3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A40","name":"English Defense: Perrin Variation","pgn":"1. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 Nc6","uci":"d2d4 e7e6 c2c4 b7b6 e2e4 c8b7 f1d3 b8c6","epd":"r2qkbnr/pbpp1ppp/1pn1p3/8/2PPP3/3B4/PP3PPP/RNBQK1NR w KQkq -"},{"eco":"A40","name":"English Defense: Poli Gambit","pgn":"1. d4 e6 2. c4 b6 3. e4 Bb7 4. f3 f5 5. exf5 Nh6","uci":"d2d4 e7e6 c2c4 b7b6 e2e4 c8b7 f2f3 f7f5 e4f5 g8h6","epd":"rn1qkb1r/pbpp2pp/1p2p2n/5P2/2PP4/5P2/PP4PP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit","pgn":"1. d4 e5","uci":"d2d4 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit Declined","pgn":"1. d4 e5 2. d5","uci":"d2d4 e7e5 d4d5","epd":"rnbqkbnr/pppp1ppp/8/3Pp3/8/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Diemer Counterattack","pgn":"1. d4 e5 2. d5 Bc5 3. e4 Qh4","uci":"d2d4 e7e5 d4d5 f8c5 e2e4 d8h4","epd":"rnb1k1nr/pppp1ppp/8/2bPp3/4P2q/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Reversed Alekhine","pgn":"1. d4 e5 2. Nf3","uci":"d2d4 e7e5 g1f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Reversed Brooklyn","pgn":"1. d4 e5 2. Nf3 e4 3. Ng1","uci":"d2d4 e7e5 g1f3 e5e4 f3g1","epd":"rnbqkbnr/pppp1ppp/8/8/3Pp3/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Reversed French","pgn":"1. d4 e5 2. e3","uci":"d2d4 e7e5 e2e3","epd":"rnbqkbnr/pppp1ppp/8/4p3/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Reversed Krebs","pgn":"1. d4 e5 2. Nf3 e4","uci":"d2d4 e7e5 g1f3 e5e4","epd":"rnbqkbnr/pppp1ppp/8/8/3Pp3/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Englund Gambit Declined: Reversed Mokele Mbembe","pgn":"1. d4 e5 2. Nf3 e4 3. Ne5","uci":"d2d4 e7e5 g1f3 e5e4 f3e5","epd":"rnbqkbnr/pppp1ppp/8/4N3/3Pp3/8/PPP1PPPP/RNBQKB1R b KQkq -"},{"eco":"A40","name":"Englund Gambit: Felbecker Gambit","pgn":"1. d4 e5 2. dxe5 Nc6 3. Nf3 Bc5","uci":"d2d4 e7e5 d4e5 b8c6 g1f3 f8c5","epd":"r1bqk1nr/pppp1ppp/2n5/2b1P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Englund Gambit: Hartlaub-Charlick Gambit","pgn":"1. d4 e5 2. dxe5 d6","uci":"d2d4 e7e5 d4e5 d7d6","epd":"rnbqkbnr/ppp2ppp/3p4/4P3/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit: Main Line","pgn":"1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7","uci":"d2d4 e7e5 d4e5 b8c6 g1f3 d8e7","epd":"r1b1kbnr/ppppqppp/2n5/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Englund Gambit: Mosquito Gambit","pgn":"1. d4 e5 2. dxe5 Qh4","uci":"d2d4 e7e5 d4e5 d8h4","epd":"rnb1kbnr/pppp1ppp/8/4P3/7q/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit: Soller Gambit","pgn":"1. d4 e5 2. dxe5 f6","uci":"d2d4 e7e5 d4e5 f7f6","epd":"rnbqkbnr/pppp2pp/5p2/4P3/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Englund Gambit: Soller Gambit Deferred","pgn":"1. d4 e5 2. dxe5 Nc6 3. Nf3 f6","uci":"d2d4 e7e5 d4e5 b8c6 g1f3 f7f6","epd":"r1bqkbnr/pppp2pp/2n2p2/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Englund Gambit: Stockholm Variation","pgn":"1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Qd5","uci":"d2d4 e7e5 d4e5 b8c6 g1f3 d8e7 d1d5","epd":"r1b1kbnr/ppppqppp/2n5/3QP3/8/5N2/PPP1PPPP/RNB1KB1R b KQkq -"},{"eco":"A40","name":"Englund Gambit: Zilbermints Gambit","pgn":"1. d4 e5 2. dxe5 Nc6 3. Nf3 Nge7","uci":"d2d4 e7e5 d4e5 b8c6 g1f3 g8e7","epd":"r1bqkb1r/ppppnppp/2n5/4P3/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Horwitz Defense","pgn":"1. d4 e6","uci":"d2d4 e7e6","epd":"rnbqkbnr/pppp1ppp/4p3/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Horwitz Defense: Zilbermints Gambit","pgn":"1. d4 e6 2. c4 e5","uci":"d2d4 e7e6 c2c4 e6e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Kangaroo Defense","pgn":"1. d4 e6 2. c4 Bb4+","uci":"d2d4 e7e6 c2c4 f8b4","epd":"rnbqk1nr/pppp1ppp/4p3/8/1bPP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Kangaroo Defense: Keres Defense, Transpositional Variation","pgn":"1. d4 e6 2. c4 Bb4+ 3. Nc3","uci":"d2d4 e7e6 c2c4 f8b4 b1c3","epd":"rnbqk1nr/pppp1ppp/4p3/8/1bPP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"A40","name":"Mikenas Defense","pgn":"1. d4 Nc6","uci":"d2d4 b8c6","epd":"r1bqkbnr/pppppppp/2n5/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Mikenas Defense: Cannstatter Variation","pgn":"1. d4 Nc6 2. c4 e5 3. d5 Nd4","uci":"d2d4 b8c6 c2c4 e7e5 d4d5 c6d4","epd":"r1bqkbnr/pppp1ppp/8/3Pp3/2Pn4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Mikenas Defense: Lithuanian Variation","pgn":"1. d4 Nc6 2. c4 e5 3. d5 Nce7","uci":"d2d4 b8c6 c2c4 e7e5 d4d5 c6e7","epd":"r1bqkbnr/ppppnppp/8/3Pp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Mikenas Defense: Pozarek Gambit","pgn":"1. d4 Nc6 2. c4 e5 3. dxe5 Nxe5 4. Nc3 Nxc4","uci":"d2d4 b8c6 c2c4 e7e5 d4e5 c6e5 b1c3 e5c4","epd":"r1bqkbnr/pppp1ppp/8/8/2n5/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"Modern Defense: Beefeater Variation","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 f5","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 f7f5","epd":"rnbqk1nr/pp1pp2p/6p1/2pP1p2/2P5/2P5/P3PPPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"Modern Defense: Lizard Defense, Pirc-Diemer Gambit","pgn":"1. d4 g6 2. h4 Nf6 3. h5","uci":"d2d4 g7g6 h2h4 g8f6 h4h5","epd":"rnbqkb1r/pppppp1p/5np1/7P/3P4/8/PPP1PPP1/RNBQKBNR b KQkq -"},{"eco":"A40","name":"Montevideo Defense","pgn":"1. d4 Nc6 2. d5 Nb8","uci":"d2d4 b8c6 d4d5 c6b8","epd":"rnbqkbnr/pppppppp/8/3P4/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Polish Defense","pgn":"1. d4 b5","uci":"d2d4 b7b5","epd":"rnbqkbnr/p1pppppp/8/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Polish Defense: Spassky Gambit Accepted","pgn":"1. d4 b5 2. e4 Bb7 3. Bxb5","uci":"d2d4 b7b5 e2e4 c8b7 f1b5","epd":"rn1qkbnr/pbpppppp/8/1B6/3PP3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. e4 Bxc3+ 6. bxc3 Qa5","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 d7d6 e2e4 g7c3 b2c3 d8a5","epd":"rnb1k1nr/pp2pp1p/3p2p1/q1pP4/2P1P3/2P5/P4PPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Central, Benoni Pterodactyl","pgn":"1. d4 g6 2. c4 Bg7 3. e4 c5 4. d5 Qa5+","uci":"d2d4 g7g6 c2c4 f8g7 e2e4 c7c5 d4d5 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1pP4/2P1P3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Qa5","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1pP4/2P5/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Fianchetto, Queen Pteranodon","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 Bxc3+ 5. bxc3 Qa5","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 d4d5 g7c3 b2c3 d8a5","epd":"rnb1k1nr/pp1ppp1p/6p1/q1pP4/2P5/2P5/P3PPPP/R1BQKBNR w KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Fianchetto, Queen Pterodactyl","pgn":"1. d4 g6 2. Nf3 Bg7 3. g3 c5 4. Bg2 Qa5+","uci":"d2d4 g7g6 g1f3 f8g7 g2g3 c7c5 f1g2 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -"},{"eco":"A40","name":"Pterodactyl Defense: Queen Pterodactyl, Quiet Line","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e3","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 c7c5 e2e3","epd":"rnbqk1nr/pp1pppbp/6p1/2p5/2PP4/2N1P3/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A40","name":"Queen's Pawn Game","pgn":"1. d4","uci":"d2d4","epd":"rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A40","name":"Queen's Pawn Game: Anglo-Slav Opening","pgn":"1. d4 c6 2. c4 d6","uci":"d2d4 c7c6 c2c4 d7d6","epd":"rnbqkbnr/pp2pppp/2pp4/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Queen's Pawn Game: Modern Defense","pgn":"1. d4 g6","uci":"d2d4 g7g6","epd":"rnbqkbnr/pppppp1p/6p1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A40","name":"Slav Indian: Kudischewitsch Gambit","pgn":"1. d4 c6 2. Nf3 Nf6 3. c4 b5","uci":"d2d4 c7c6 g1f3 g8f6 c2c4 b7b5","epd":"rnbqkb1r/p2ppppp/2p2n2/1p6/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A40","name":"Zaire Defense","pgn":"1. d4 Nc6 2. d5 Nb8 3. e4 Nf6 4. e5 Ng8","uci":"d2d4 b8c6 d4d5 c6b8 e2e4 g8f6 e4e5 f6g8","epd":"rnbqkbnr/pppppppp/8/3PP3/8/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Modern Defense","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 d6","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 d7d6","epd":"rnbqk1nr/ppp1ppbp/3p2p1/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A41","name":"Modern Defense: Neo-Modern Defense","pgn":"1. d4 g6 2. c4 Bg7 3. e4 e5","uci":"d2d4 g7g6 c2c4 f8g7 e2e4 e7e5","epd":"rnbqk1nr/pppp1pbp/6p1/4p3/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Old Indian Defense","pgn":"1. d4 d6 2. c4","uci":"d2d4 d7d6 c2c4","epd":"rnbqkbnr/ppp1pppp/3p4/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A41","name":"Queen's Pawn Game","pgn":"1. d4 d6","uci":"d2d4 d7d6","epd":"rnbqkbnr/ppp1pppp/3p4/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Queen's Pawn Game: Rossolimo Variation","pgn":"1. d4 d6 2. Nf3 g6","uci":"d2d4 d7d6 g1f3 g7g6","epd":"rnbqkbnr/ppp1pp1p/3p2p1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A41","name":"Rat Defense: English Rat","pgn":"1. d4 d6 2. c4 e5","uci":"d2d4 d7d6 c2c4 e7e5","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Rat Defense: English Rat, Lisbon Gambit","pgn":"1. d4 d6 2. c4 e5 3. dxe5 Nc6","uci":"d2d4 d7d6 c2c4 e7e5 d4e5 b8c6","epd":"r1bqkbnr/ppp2ppp/2np4/4P3/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Rat Defense: English Rat, Pounds Gambit","pgn":"1. d4 d6 2. c4 e5 3. dxe5 Be6","uci":"d2d4 d7d6 c2c4 e7e5 d4e5 c8e6","epd":"rn1qkbnr/ppp2ppp/3pb3/4P3/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A41","name":"Robatsch Defense: Rossolimo Variation","pgn":"1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. e4 Bg4","uci":"d2d4 d7d6 g1f3 g7g6 c2c4 f8g7 e2e4 c8g4","epd":"rn1qk1nr/ppp1ppbp/3p2p1/8/2PPP1b1/5N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"A41","name":"Wade Defense","pgn":"1. d4 d6 2. Nf3 Bg4","uci":"d2d4 d7d6 g1f3 c8g4","epd":"rn1qkbnr/ppp1pppp/3p4/8/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A41","name":"Zukertort Opening: Wade Defense, Chigorin Plan","pgn":"1. d4 d6 2. Nf3 Bg4 3. c4 Nd7 4. Qb3 Rb8","uci":"d2d4 d7d6 g1f3 c8g4 c2c4 b8d7 d1b3 a8b8","epd":"1r1qkbnr/pppnpppp/3p4/8/2PP2b1/1Q3N2/PP2PPPP/RNB1KB1R w KQk -"},{"eco":"A42","name":"Modern Defense: Averbakh System","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4","epd":"rnbqk1nr/ppp1ppbp/3p2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A42","name":"Modern Defense: Averbakh Variation, Pseudo-Sämisch","pgn":"1. d4 g6 2. c4 Bg7 3. e4 d6 4. Be3 Nf6 5. f3","uci":"d2d4 g7g6 c2c4 f8g7 e2e4 d7d6 c1e3 g8f6 f2f3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/4BP2/PP4PP/RN1QKBNR b KQkq -"},{"eco":"A42","name":"Modern Defense: Kotov Variation","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4 b8c6","epd":"r1bqk1nr/ppp1ppbp/2np2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"A42","name":"Modern Defense: Randspringer Variation","pgn":"1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 f5","uci":"d2d4 g7g6 c2c4 f8g7 b1c3 d7d6 e2e4 f7f5","epd":"rnbqk1nr/ppp1p1bp/3p2p1/5p2/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"A42","name":"Pterodactyl Defense","pgn":"1. Nf3 c5 2. c4 g6 3. d4 Bg7 4. e4 Qa5+ 5. Nc3 d6","uci":"g1f3 c7c5 c2c4 g7g6 d2d4 f8g7 e2e4 d8a5 b1c3 d7d6","epd":"rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N2N2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"A42","name":"Pterodactyl Defense: Central, Bogolubovia","pgn":"1. d4 g6 2. c4 Bg7 3. e4 d6 4. Nc3 c5 5. Nge2 Qa5","uci":"d2d4 g7g6 c2c4 f8g7 e2e4 d7d6 b1c3 c7c5 g1e2 d8a5","epd":"rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N5/PP2NPPP/R1BQKB1R w KQkq -"},{"eco":"A43","name":"Benoni Defense: Benoni Gambit Accepted","pgn":"1. d4 c5 2. dxc5","uci":"d2d4 c7c5 d4c5","epd":"rnbqkbnr/pp1ppppp/8/2P5/8/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A43","name":"Benoni Defense: Benoni Gambit, Schlenker Defense","pgn":"1. d4 c5 2. dxc5 Na6","uci":"d2d4 c7c5 d4c5 b8a6","epd":"r1bqkbnr/pp1ppppp/n7/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Benoni-Indian Defense","pgn":"1. d4 c5 2. d5 Nf6","uci":"d2d4 c7c5 d4d5 g8f6","epd":"rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Benoni-Indian Defense, Kingside Move Order","pgn":"1. d4 c5 2. d5 Nf6 3. Nf3","uci":"d2d4 c7c5 d4d5 g8f6 g1f3","epd":"rnbqkb1r/pp1ppppp/5n2/2pP4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq -"},{"eco":"A43","name":"Benoni Defense: Benoni-Staunton Gambit","pgn":"1. d4 c5 2. d5 f5 3. e4","uci":"d2d4 c7c5 d4d5 f7f5 e2e4","epd":"rnbqkbnr/pp1pp1pp/8/2pP1p2/4P3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"A43","name":"Benoni Defense: Cormorant Gambit","pgn":"1. d4 c5 2. dxc5 b6","uci":"d2d4 c7c5 d4c5 b7b6","epd":"rnbqkbnr/p2ppppp/1p6/2P5/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: French Benoni","pgn":"1. e4 e6 2. d4 c5 3. d5","uci":"e2e4 e7e6 d2d4 c7c5 d4d5","epd":"rnbqkbnr/pp1p1ppp/4p3/2pP4/4P3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"A43","name":"Benoni Defense: Hawk Variation","pgn":"1. d4 Nf6 2. Nf3 c5 3. d5 c4","uci":"d2d4 g8f6 g1f3 c7c5 d4d5 c5c4","epd":"rnbqkb1r/pp1ppppp/5n2/3P4/2p5/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A43","name":"Benoni Defense: Old Benoni","pgn":"1. d4 c5","uci":"d2d4 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Old Benoni","pgn":"1. d4 c5 2. d5","uci":"d2d4 c7c5 d4d5","epd":"rnbqkbnr/pp1ppppp/8/2pP4/8/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A43","name":"Benoni Defense: Old Benoni","pgn":"1. d4 c5 2. d5 d6","uci":"d2d4 c7c5 d4d5 d7d6","epd":"rnbqkbnr/pp2pppp/3p4/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Old Benoni, Mujannah Formation","pgn":"1. d4 c5 2. d5 f5","uci":"d2d4 c7c5 d4d5 f7f5","epd":"rnbqkbnr/pp1pp1pp/8/2pP1p2/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Old Benoni, Schmid Variation","pgn":"1. d4 c5 2. d5 d6 3. Nc3 g6","uci":"d2d4 c7c5 d4d5 d7d6 b1c3 g7g6","epd":"rnbqkbnr/pp2pp1p/3p2p1/2pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Snail Variation","pgn":"1. d4 c5 2. d5 Na6","uci":"d2d4 c7c5 d4d5 b8a6","epd":"r1bqkbnr/pp1ppppp/n7/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Woozle","pgn":"1. d4 c5 2. d5 Nf6 3. Nc3 Qa5","uci":"d2d4 c7c5 d4d5 g8f6 b1c3 d8a5","epd":"rnb1kb1r/pp1ppppp/5n2/q1pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A43","name":"Benoni Defense: Zilbermints-Benoni Gambit","pgn":"1. d4 c5 2. b4","uci":"d2d4 c7c5 b2b4","epd":"rnbqkbnr/pp1ppppp/8/2p5/1P1P4/8/P1P1PPPP/RNBQKBNR b KQkq -"},{"eco":"A43","name":"Benoni Defense: Zilbermints-Benoni Gambit","pgn":"1. d4 c5 2. Nf3 cxd4 3. b4","uci":"d2d4 c7c5 g1f3 c5d4 b2b4","epd":"rnbqkbnr/pp1ppppp/8/8/1P1p4/5N2/P1P1PPPP/RNBQKB1R b KQkq -"},{"eco":"A43","name":"Benoni Defense: Zilbermints-Benoni Gambit, Tamarkin Countergambit","pgn":"1. d4 c5 2. Nf3 cxd4 3. b4 e5","uci":"d2d4 c7c5 g1f3 c5d4 b2b4 e7e5","epd":"rnbqkbnr/pp1p1ppp/8/4p3/1P1p4/5N2/P1P1PPPP/RNBQKB1R w KQkq -"},{"eco":"A43","name":"Indian Defense: Pseudo-Benko","pgn":"1. d4 Nf6 2. Nf3 c5 3. d5 b5","uci":"d2d4 g8f6 g1f3 c7c5 d4d5 b7b5","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A43","name":"Queen's Pawn Game: Liedmann Gambit","pgn":"1. d4 c5 2. c4 cxd4 3. e3","uci":"d2d4 c7c5 c2c4 c5d4 e2e3","epd":"rnbqkbnr/pp1ppppp/8/8/2Pp4/4P3/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"A44","name":"Benoni Defense: Old Benoni","pgn":"1. d4 c5 2. d5 e5","uci":"d2d4 c7c5 d4d5 e7e5","epd":"rnbqkbnr/pp1p1ppp/8/2pPp3/8/8/PPP1PPPP/RNBQKBNR w KQkq e6"},{"eco":"A44","name":"Benoni Defense: Semi-Benoni","pgn":"1. d4 c5 2. d5 e5 3. e4 d6","uci":"d2d4 c7c5 d4d5 e7e5 e2e4 d7d6","epd":"rnbqkbnr/pp3ppp/3p4/2pPp3/4P3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"A45","name":"Amazon Attack: Siberian Attack","pgn":"1. d4 Nf6 2. Nc3 d5 3. Qd3","uci":"d2d4 g8f6 b1c3 d7d5 d1d3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2NQ4/PPP1PPPP/R1B1KBNR b KQkq -"},{"eco":"A45","name":"Basque Opening","pgn":"1. d4 Nf6 2. b3","uci":"d2d4 g8f6 b2b3","epd":"rnbqkb1r/pppppppp/5n2/8/3P4/1P6/P1P1PPPP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Canard Opening","pgn":"1. d4 Nf6 2. f4","uci":"d2d4 g8f6 f2f4","epd":"rnbqkb1r/pppppppp/5n2/8/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense","pgn":"1. d4 Nf6","uci":"d2d4 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Accelerated London System","pgn":"1. d4 Nf6 2. Bf4","uci":"d2d4 g8f6 c1f4","epd":"rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Gedult Attack","pgn":"1. d4 Nf6 2. f3 d5 3. g4","uci":"d2d4 g8f6 f2f3 d7d5 g2g4","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P2P1/5P2/PPP1P2P/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Gibbins-Weidenhagen Gambit","pgn":"1. d4 Nf6 2. g4","uci":"d2d4 g8f6 g2g4","epd":"rnbqkb1r/pppppppp/5n2/8/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Gibbins-Weidenhagen Gambit Accepted","pgn":"1. d4 Nf6 2. g4 Nxg4","uci":"d2d4 g8f6 g2g4 f6g4","epd":"rnbqkb1r/pppppppp/8/8/3P2n1/8/PPP1PP1P/RNBQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon","pgn":"1. d4 Nf6 2. g4 Nxg4 3. f3 Nf6 4. e4","uci":"d2d4 g8f6 g2g4 f6g4 f2f3 g4f6 e2e4","epd":"rnbqkb1r/pppppppp/5n2/8/3PP3/5P2/PPP4P/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense","pgn":"1. d4 Nf6 2. g4 e5","uci":"d2d4 g8f6 g2g4 e7e5","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/3P2P1/8/PPP1PP1P/RNBQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit","pgn":"1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3","uci":"d2d4 g8f6 g2g4 f6g4 e2e4 d7d6 f1e2 g4f6 b1c3","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/2N5/PPP1BP1P/R1BQK1NR b KQkq -"},{"eco":"A45","name":"Indian Defense: Lazard Gambit","pgn":"1. d4 Nf6 2. Nd2 e5","uci":"d2d4 g8f6 b1d2 e7e5","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/3P4/8/PPPNPPPP/R1BQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Maddigan Gambit","pgn":"1. d4 Nf6 2. Nc3 e5","uci":"d2d4 g8f6 b1c3 e7e5","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Omega Gambit","pgn":"1. d4 Nf6 2. e4","uci":"d2d4 g8f6 e2e4","epd":"rnbqkb1r/pppppppp/5n2/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Omega Gambit, Arafat Gambit","pgn":"1. d4 Nf6 2. e4 Nxe4 3. Bd3 Nf6 4. Bg5","uci":"d2d4 g8f6 e2e4 f6e4 f1d3 e4f6 c1g5","epd":"rnbqkb1r/pppppppp/5n2/6B1/3P4/3B4/PPP2PPP/RN1QK1NR b KQkq -"},{"eco":"A45","name":"Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred","pgn":"1. d4 Nf6 2. f3 d5 3. e4","uci":"d2d4 g8f6 f2f3 d7d5 e2e4","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Pawn Push Variation","pgn":"1. d4 Nf6 2. d5","uci":"d2d4 g8f6 d4d5","epd":"rnbqkb1r/pppppppp/5n2/3P4/8/8/PPP1PPPP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Indian Defense: Reversed Chigorin Defense","pgn":"1. d4 Nf6 2. Nc3 c5","uci":"d2d4 g8f6 b1c3 c7c5","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A45","name":"Indian Defense: Tartakower Attack","pgn":"1. d4 Nf6 2. g3","uci":"d2d4 g8f6 g2g3","epd":"rnbqkb1r/pppppppp/5n2/8/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Paleface Attack","pgn":"1. d4 Nf6 2. f3","uci":"d2d4 g8f6 f2f3","epd":"rnbqkb1r/pppppppp/5n2/8/3P4/5P2/PPP1P1PP/RNBQKBNR b KQkq -"},{"eco":"A45","name":"Queen's Pawn Game: Chigorin Variation","pgn":"1. d4 Nf6 2. Nc3 d5","uci":"d2d4 g8f6 b1c3 d7d5","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A45","name":"Queen's Pawn Game: Veresov, Richter Attack","pgn":"1. d4 Nf6 2. f3 d5 3. Nc3","uci":"d2d4 g8f6 f2f3 d7d5 b1c3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N2P2/PPP1P1PP/R1BQKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack","pgn":"1. d4 Nf6 2. Bg5","uci":"d2d4 g8f6 c1g5","epd":"rnbqkb1r/pppppppp/5n2/6B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Borg Variation","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. Bf4 g5","uci":"d2d4 g8f6 c1g5 f6e4 g5f4 g7g5","epd":"rnbqkb1r/pppppp1p/8/6p1/3PnB2/8/PPP1PPPP/RN1QKBNR w KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Classical Defense","pgn":"1. d4 Nf6 2. Bg5 e6","uci":"d2d4 g8f6 c1g5 e7e6","epd":"rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/8/PPP1PPPP/RN1QKBNR w KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Classical Defense, Big Center Variation","pgn":"1. d4 Nf6 2. Bg5 e6 3. e4","uci":"d2d4 g8f6 c1g5 e7e6 e2e4","epd":"rnbqkb1r/pppp1ppp/4pn2/6B1/3PP3/8/PPP2PPP/RN1QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Edge Variation","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. Bh4","uci":"d2d4 g8f6 c1g5 f6e4 g5h4","epd":"rnbqkb1r/pppppppp/8/8/3Pn2B/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Edge Variation, Hergert Gambit","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. Bh4 c6 4. Nd2 Qa5 5. c3 Nxd2 6. Qxd2 d5 7. e4","uci":"d2d4 g8f6 c1g5 f6e4 g5h4 c7c6 b1d2 d8a5 c2c3 e4d2 d1d2 d7d5 e2e4","epd":"rnb1kb1r/pp2pppp/2p5/q2p4/3PP2B/2P5/PP1Q1PPP/R3KBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Edge Variation, Hergert Gambit","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. Bh4 d5 4. f3 Nf6 5. Nc3 Bf5 6. e4","uci":"d2d4 g8f6 c1g5 f6e4 g5h4 d7d5 f2f3 e4f6 b1c3 c8f5 e2e4","epd":"rn1qkb1r/ppp1pppp/5n2/3p1b2/3PP2B/2N2P2/PPP3PP/R2QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Poisoned Pawn Variation","pgn":"1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3","uci":"d2d4 g8f6 c1g5 c7c5 d4d5 d8b6 b1c3","epd":"rnb1kb1r/pp1ppppp/1q3n2/2pP2B1/8/2N5/PPP1PPPP/R2QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Raptor Variation","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. h4","uci":"d2d4 g8f6 c1g5 f6e4 h2h4","epd":"rnbqkb1r/pppppppp/8/6B1/3Pn2P/8/PPP1PPP1/RN1QKBNR b KQkq -"},{"eco":"A45","name":"Trompowsky Attack: Raptor Variation, Hergert Gambit","pgn":"1. d4 Nf6 2. Bg5 Ne4 3. h4 Nxg5 4. hxg5 e5","uci":"d2d4 g8f6 c1g5 f6e4 h2h4 e4g5 h4g5 e7e5","epd":"rnbqkb1r/pppp1ppp/8/4p1P1/3P4/8/PPP1PPP1/RN1QKBNR w KQkq -"},{"eco":"A46","name":"Döry Defense","pgn":"1. d4 Nf6 2. Nf3 Ne4","uci":"d2d4 g8f6 g1f3 f6e4","epd":"rnbqkb1r/pppppppp/8/8/3Pn3/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Indian Defense: Czech-Indian","pgn":"1. d4 Nf6 2. Nf3 c6","uci":"d2d4 g8f6 g1f3 c7c6","epd":"rnbqkb1r/pp1ppppp/2p2n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Indian Defense: Knights Variation","pgn":"1. d4 Nf6 2. Nf3","uci":"d2d4 g8f6 g1f3","epd":"rnbqkb1r/pppppppp/5n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -"},{"eco":"A46","name":"Indian Defense: Knights Variation, Alburt-Miles Variation","pgn":"1. d4 Nf6 2. Nf3 a6","uci":"d2d4 g8f6 g1f3 a7a6","epd":"rnbqkb1r/1ppppppp/p4n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Indian Defense: London System","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bf4","uci":"d2d4 g8f6 g1f3 e7e6 c1f4","epd":"rnbqkb1r/pppp1ppp/4pn2/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"A46","name":"Indian Defense: Polish Variation","pgn":"1. d4 Nf6 2. Nf3 b5","uci":"d2d4 g8f6 g1f3 b7b5","epd":"rnbqkb1r/p1pppppp/5n2/1p6/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Indian Defense: Spielmann-Indian","pgn":"1. d4 Nf6 2. Nf3 c5","uci":"d2d4 g8f6 g1f3 c7c5","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Indian Defense: Wade-Tartakower Defense","pgn":"1. d4 Nf6 2. Nf3 d6","uci":"d2d4 g8f6 g1f3 d7d6","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A46","name":"Queen's Pawn Game: Torre Attack, Breyer Variation","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. e3 c5 5. c3 Qb6","uci":"d2d4 g8f6 g1f3 e7e6 c1g5 d7d5 e2e3 c7c5 c2c3 d8b6","epd":"rnb1kb1r/pp3ppp/1q2pn2/2pp2B1/3P4/2P1PN2/PP3PPP/RN1QKB1R w KQkq -"},{"eco":"A46","name":"Queen's Pawn Game: Veresov Attack, Classical Defense","pgn":"1. d4 Nf6 2. Nf3 e6 3. Nc3 d5 4. Bg5","uci":"d2d4 g8f6 g1f3 e7e6 b1c3 d7d5 c1g5","epd":"rnbqkb1r/ppp2ppp/4pn2/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R b KQkq -"},{"eco":"A46","name":"Torre Attack: Classical Defense","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bg5","uci":"d2d4 g8f6 g1f3 e7e6 c1g5","epd":"rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"A46","name":"Torre Attack: Classical Defense, Nimzowitsch Variation","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bg5 h6","uci":"d2d4 g8f6 g1f3 e7e6 c1g5 h7h6","epd":"rnbqkb1r/pppp1pp1/4pn1p/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R w KQkq -"},{"eco":"A46","name":"Torre Attack: Classical Defense, Petrosian Gambit","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e3 b6 5. d5","uci":"d2d4 g8f6 g1f3 e7e6 c1g5 c7c5 e2e3 b7b6 d4d5","epd":"rnbqkb1r/p2p1ppp/1p2pn2/2pP2B1/8/4PN2/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"A46","name":"Torre Attack: Wagner Gambit","pgn":"1. d4 Nf6 2. Nf3 e6 3. Bg5 c5 4. e4","uci":"d2d4 g8f6 g1f3 e7e6 c1g5 c7c5 e2e4","epd":"rnbqkb1r/pp1p1ppp/4pn2/2p3B1/3PP3/5N2/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"A46","name":"Yusupov-Rubinstein System","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3","uci":"d2d4 g8f6 g1f3 e7e6 e2e3","epd":"rnbqkb1r/pppp1ppp/4pn2/8/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"A47","name":"Indian Defense: Schnepper Gambit","pgn":"1. d4 Nf6 2. Nf3 b6 3. c3 e5","uci":"d2d4 g8f6 g1f3 b7b6 c2c3 e7e5","epd":"rnbqkb1r/p1pp1ppp/1p3n2/4p3/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A47","name":"Marienbad System","pgn":"1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5","uci":"d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5","epd":"rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -"},{"eco":"A47","name":"Marienbad System: Berg Variation","pgn":"1. d4 Nf6 2. Nf3 b6 3. g3 Bb7 4. Bg2 c5 5. c4 cxd4 6. Qxd4","uci":"d2d4 g8f6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 c2c4 c5d4 d1d4","epd":"rn1qkb1r/pb1ppppp/1p3n2/8/2PQ4/5NP1/PP2PPBP/RNB1K2R b KQkq -"},{"eco":"A47","name":"Pseudo Queen's Indian Defense","pgn":"1. d4 Nf6 2. Nf3 b6","uci":"d2d4 g8f6 g1f3 b7b6","epd":"rnbqkb1r/p1pppppp/1p3n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A47","name":"Pseudo Queen's Indian Defense","pgn":"1. d4 Nf6 2. Nf3 b6 3. e3 Bb7 4. Bd3 e6 5. Nbd2 c5 6. b3 Be7","uci":"d2d4 g8f6 g1f3 b7b6 e2e3 c8b7 f1d3 e7e6 b1d2 c7c5 b2b3 f8e7","epd":"rn1qk2r/pb1pbppp/1p2pn2/2p5/3P4/1P1BPN2/P1PN1PPP/R1BQK2R w KQkq -"},{"eco":"A48","name":"East Indian Defense","pgn":"1. d4 Nf6 2. Nf3 g6","uci":"d2d4 g8f6 g1f3 g7g6","epd":"rnbqkb1r/pppppp1p/5np1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A48","name":"Indian Defense: Colle System, King's Indian Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6","uci":"d2d4 g8f6 g1f3 g7g6 e2e3 f8g7 f1d3 d7d6","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"A48","name":"London System","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4","uci":"d2d4 g8f6 g1f3 g7g6 c1f4","epd":"rnbqkb1r/pppppp1p/5np1/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"A48","name":"London System","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3","epd":"rnbqk2r/ppppppbp/5np1/8/3P1B2/4PN2/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"A48","name":"London System","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3 d7d6","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/3P1B2/4PN2/PPP2PPP/RN1QKB1R w KQkq -"},{"eco":"A48","name":"London System, with Bd3","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Bd3","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3 d7d6 f1d3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/3P1B2/3BPN2/PPP2PPP/RN1QK2R b KQkq -"},{"eco":"A48","name":"London System, with Be2","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Be2","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3 d7d6 f1e2","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/3P1B2/4PN2/PPP1BPPP/RN1QK2R b KQkq -"},{"eco":"A48","name":"London System, with Be2","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Be2 O-O","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3 d7d6 f1e2 e8g8","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/3P1B2/4PN2/PPP1BPPP/RN1QK2R w KQ -"},{"eco":"A48","name":"London System, with Be2","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. h3 c5 6. Be2","uci":"d2d4 g8f6 g1f3 g7g6 c1f4 f8g7 e2e3 d7d6 h2h3 c7c5 f1e2","epd":"rnbqk2r/pp2ppbp/3p1np1/2p5/3P1B2/4PN1P/PPP1BPP1/RN1QK2R b KQkq -"},{"eco":"A48","name":"Queen's Pawn Game: Barry Attack","pgn":"1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4","uci":"d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/3P1B2/2N2N2/PPP1PPPP/R2QKB1R b KQkq -"},{"eco":"A48","name":"Queen's Pawn Game: Barry Attack","pgn":"1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7","uci":"d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/3P1B2/2N2N2/PPP1PPPP/R2QKB1R w KQkq -"},{"eco":"A48","name":"Queen's Pawn Game: Barry Attack, Grünfeld Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Be2","uci":"d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 f1e2","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/3P1B2/2N1PN2/PPP1BPPP/R2QK2R b KQ -"},{"eco":"A48","name":"Queen's Pawn Game: Barry Attack, Tarzan Attack","pgn":"1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. Qd2","uci":"d2d4 g8f6 g1f3 g7g6 b1c3 d7d5 c1f4 f8g7 d1d2","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/3P1B2/2N2N2/PPPQPPPP/R3KB1R b KQkq -"},{"eco":"A48","name":"Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O","uci":"d2d4 g8f6 g1f3 g7g6 c1g5 f8g7 b1d2 d7d5 e2e3 e8g8","epd":"rnbq1rk1/ppp1ppbp/5np1/3p2B1/3P4/4PN2/PPPN1PPP/R2QKB1R w KQ -"},{"eco":"A48","name":"Torre Attack: Fianchetto Defense","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bg5","uci":"d2d4 g8f6 g1f3 g7g6 c1g5","epd":"rnbqkb1r/pppppp1p/5np1/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"A48","name":"Torre Attack: Fianchetto Defense, Euwe Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 c5","uci":"d2d4 g8f6 g1f3 g7g6 c1g5 f8g7 b1d2 c7c5","epd":"rnbqk2r/pp1pppbp/5np1/2p3B1/3P4/5N2/PPPNPPPP/R2QKB1R w KQkq -"},{"eco":"A49","name":"Indian Defense: Przepiorka Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. g3","uci":"d2d4 g8f6 g1f3 g7g6 g2g3","epd":"rnbqkb1r/pppppp1p/5np1/8/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -"},{"eco":"A50","name":"Indian Defense: Medusa Gambit","pgn":"1. d4 Nf6 2. c4 g5","uci":"d2d4 g8f6 c2c4 g7g5","epd":"rnbqkb1r/pppppp1p/5n2/6p1/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A50","name":"Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4","uci":"d2d4 g8f6 c2c4","epd":"rnbqkb1r/pppppppp/5n2/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A50","name":"Indian Defense: Pyrenees Gambit","pgn":"1. d4 Nf6 2. c4 b5","uci":"d2d4 g8f6 c2c4 b7b5","epd":"rnbqkb1r/p1pppppp/5n2/1p6/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A50","name":"Mexican Defense","pgn":"1. d4 Nf6 2. c4 Nc6","uci":"d2d4 g8f6 c2c4 b8c6","epd":"r1bqkb1r/pppppppp/2n2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A50","name":"Mexican Defense: Horsefly Gambit","pgn":"1. d4 Nf6 2. c4 Nc6 3. d5 Ne5 4. f4","uci":"d2d4 g8f6 c2c4 b8c6 d4d5 c6e5 f2f4","epd":"r1bqkb1r/pppppppp/5n2/3Pn3/2P2P2/8/PP2P1PP/RNBQKBNR b KQkq -"},{"eco":"A50","name":"Queen's Indian Accelerated","pgn":"1. d4 Nf6 2. c4 b6","uci":"d2d4 g8f6 c2c4 b7b6","epd":"rnbqkb1r/p1pppppp/1p3n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A50","name":"Slav Indian","pgn":"1. d4 Nf6 2. c4 c6","uci":"d2d4 g8f6 c2c4 c7c6","epd":"rnbqkb1r/pp1ppppp/2p2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A51","name":"Indian Defense: Budapest Gambit","pgn":"1. d4 Nf6 2. c4 e5","uci":"d2d4 g8f6 c2c4 e7e5","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A51","name":"Indian Defense: Budapest Gambit Accepted","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5","uci":"d2d4 g8f6 c2c4 e7e5 d4e5","epd":"rnbqkb1r/pppp1ppp/5n2/4P3/2P5/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A51","name":"Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ne4","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6e4","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A51","name":"Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. a3","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6e4 a2a3","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P1n3/P7/1P2PPPP/RNBQKBNR b KQkq -"},{"eco":"A51","name":"Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Steiner Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 4. Qc2","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6e4 d1c2","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PPQ1PPPP/RNB1KBNR b KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P3n1/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line, Adler Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 g1f3","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P3n1/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 g4e5","epd":"rnbqkb1r/pppp1ppp/8/4n3/2P1P3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower Defense","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 e2e4 d7d6","epd":"rnbqkb1r/ppp2ppp/3p4/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"A52","name":"Indian Defense: Budapest Gambit Accepted, Main Line, Rubinstein Variation","pgn":"1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4","uci":"d2d4 g8f6 c2c4 e7e5 d4e5 f6g4 c1f4","epd":"rnbqkb1r/pppp1ppp/8/4P3/2P2Bn1/8/PP2PPPP/RN1QKBNR b KQkq -"},{"eco":"A53","name":"Old Indian Defense","pgn":"1. d4 Nf6 2. c4 d6","uci":"d2d4 g8f6 c2c4 d7d6","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A53","name":"Old Indian Defense: Aged Gibbon Gambit","pgn":"1. d4 Nf6 2. c4 d6 3. g4","uci":"d2d4 g8f6 c2c4 d7d6 g2g4","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/2PP2P1/8/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"A53","name":"Old Indian Defense: Czech Variation, with Nc3","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 c6","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 c7c6","epd":"rnbqkb1r/pp2pppp/2pp1n2/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A53","name":"Old Indian Defense: Czech Variation, with Nf3","pgn":"1. d4 Nf6 2. c4 d6 3. Nf3 c6","uci":"d2d4 g8f6 c2c4 d7d6 g1f3 c7c6","epd":"rnbqkb1r/pp2pppp/2pp1n2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A53","name":"Old Indian Defense: Janowski Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Bf5","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 c8f5","epd":"rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A53","name":"Old Indian Defense: Janowski Variation, Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. g3","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 g2g3","epd":"rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq -"},{"eco":"A53","name":"Old Indian Defense: Janowski Variation, Grinberg Gambit","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. e4","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 e2e4","epd":"rn1qkb1r/ppp1pppp/3p1n2/5b2/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A53","name":"Old Indian Defense: Janowski Variation, Main Line","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Bf5 4. f3","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 c8f5 f2f3","epd":"rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"A54","name":"Old Indian Defense: Duz-Khotimirsky Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. e3 Nbd7 5. Bd3","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 e2e3 b8d7 f1d3","epd":"r1bqkb1r/pppn1ppp/3p1n2/4p3/2PP4/2NBP3/PP3PPP/R1BQK1NR b KQkq -"},{"eco":"A54","name":"Old Indian Defense: Tartakower-Indian","pgn":"1. d4 Nf6 2. c4 d6 3. Nf3 Bg4","uci":"d2d4 g8f6 c2c4 d7d6 g1f3 c8g4","epd":"rn1qkb1r/ppp1pppp/3p1n2/8/2PP2b1/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"A54","name":"Old Indian Defense: Two Knights Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 e5 4. Nf3","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 e7e5 g1f3","epd":"rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"A54","name":"Old Indian Defense: Ukrainian Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 e5","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 e7e5","epd":"rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A55","name":"Old Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 b8d7 e2e4 e7e5 g1f3","epd":"r1bqkb1r/pppn1ppp/3p1n2/4p3/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"A56","name":"Benoni Defense","pgn":"1. d4 Nf6 2. c4 c5","uci":"d2d4 g8f6 c2c4 c7c5","epd":"rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A56","name":"Benoni Defense: Czech Benoni Defense","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e5","epd":"rnbqkb1r/pp1p1ppp/5n2/2pPp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq e6"},{"eco":"A56","name":"Benoni Defense: Hromádka System","pgn":"1. d4 Nf6 2. c4 c5 3. d5 d6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 d7d6","epd":"rnbqkb1r/pp2pppp/3p1n2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A56","name":"Benoni Defense: King's Indian System","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e5 b1c3 d7d6 e2e4 g7g6","epd":"rnbqkb1r/pp3p1p/3p1np1/2pPp3/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"A56","name":"Benoni Defense: Weenink Variation","pgn":"1. d4 Nf6 2. c4 c5 3. dxc5 e6","uci":"d2d4 g8f6 c2c4 c7c5 d4c5 e7e6","epd":"rnbqkb1r/pp1p1ppp/4pn2/2P5/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A56","name":"Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch","pgn":"1. d4 Nf6 2. c4 c5 3. e3 g6 4. Nc3 Bg7 5. Nf3 O-O 6. Be2 cxd4 7. exd4 d5 8. O-O Nc6","uci":"d2d4 g8f6 c2c4 c7c5 e2e3 g7g6 b1c3 f8g7 g1f3 e8g8 f1e2 c5d4 e3d4 d7d5 e1g1 b8c6","epd":"r1bq1rk1/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"A56","name":"Vulture Defense","pgn":"1. d4 Nf6 2. c4 c5 3. d5 Ne4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 f6e4","epd":"rnbqkb1r/pp1ppppp/8/2pP4/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A57","name":"Benko Gambit","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A57","name":"Benko Gambit Accepted","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6","epd":"rnbqkb1r/3ppppp/p4n2/1PpP4/8/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A57","name":"Benko Gambit Accepted: Dlugy Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 f2f3","epd":"rnbqkb1r/3ppppp/p4n2/1PpP4/8/5P2/PP2P1PP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Accepted: Modern Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 e2e3","epd":"rnbqkb1r/3ppppp/p4n2/1PpP4/8/4P3/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Accepted: Pawn Return Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5b6","epd":"rnbqkb1r/3ppppp/pP3n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Bishop Attack","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. Bg5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c1g5","epd":"rnbqkb1r/p2ppppp/5n2/1ppP2B1/2P5/8/PP2PPPP/RN1QKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Hjørring Countergambit","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. e4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 e2e4","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P1P3/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nf3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 g1f3","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Pseudo-Sämisch","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. f3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 f2f3","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/5P2/PP2P1PP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Quiet Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 b1d2","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP1NPPPP/R1BQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit Declined: Sosonko Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. a4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 a2a4","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/P1P5/8/1P2PPPP/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit: Mutkin Countergambit","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. g4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 g2g4","epd":"rnbqkb1r/p2ppppp/5n2/1ppP4/2P3P1/8/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit: Nescafe Frappe Attack","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3 a6b5 e2e4 b5b4 c3b5 d7d6 f1c4","epd":"rnbqkb1r/4pppp/3p1n2/1NpP4/1pB1P3/8/PP3PPP/R1BQK1NR b KQkq -"},{"eco":"A57","name":"Benko Gambit: Zaitsev System","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3","epd":"rnbqkb1r/3ppppp/p4n2/1PpP4/8/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"A57","name":"Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b1c3 a6b5 e2e4 b5b4 c3b5","epd":"rnbqkb1r/3ppppp/5n2/1NpP4/1p2P3/8/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A58","name":"Benko Gambit Accepted: Central Storming Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. f4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 f2f4","epd":"rn1qkb1r/3ppp1p/b4np1/2pP4/5P2/2N5/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"A58","name":"Benko Gambit Accepted: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. g3 d6 8. Bg2 Bg7 9. Nf3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g2g3 d7d6 f1g2 f8g7 g1f3","epd":"rn1qk2r/4ppbp/b2p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R b KQkq -"},{"eco":"A58","name":"Benko Gambit Accepted: Fully Accepted Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6","epd":"rnbqkb1r/3ppppp/P4n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A58","name":"Benko Gambit: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. g3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 g2g3","epd":"rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"A58","name":"Benko Gambit: Nd2 Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. Nd2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 g1f3 g7g6 f3d2","epd":"rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -"},{"eco":"A59","name":"Benko Gambit","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. g3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g2g3","epd":"rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N3P1/PP3P1P/R1BQ1KNR b kq -"},{"eco":"A59","name":"Benko Gambit Accepted: King Walk Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 g1f3 d7d6 e2e4 a6f1 e1f1 f8g7 g2g3 e8g8 f1g2","epd":"rn1q1rk1/4ppbp/3p1np1/2pP4/4P3/2N2NP1/PP3PKP/R1BQ3R b - -"},{"eco":"A59","name":"Benko Gambit Accepted: Yugoslav","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 c8a6 b1c3 d7d6 e2e4","epd":"rn1qkb1r/4pppp/b2p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A59","name":"Benko Gambit Accepted: Yugoslav","pgn":"1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nge2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 b7b5 c4b5 a7a6 b5a6 g7g6 b1c3 c8a6 e2e4 a6f1 e1f1 d7d6 g1e2","epd":"rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N5/PP2NPPP/R1BQ1K1R b kq -"},{"eco":"A60","name":"Benoni Defense: Modern Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6","epd":"rnbqkb1r/pp1p1ppp/4pn2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A60","name":"Benoni Defense: Modern Variation, Snake Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 f8d6","epd":"rnbqk2r/pp1p1ppp/3b1n2/2pP4/8/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A61","name":"Benoni Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"A61","name":"Benoni Defense: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. g3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 g2g3","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"A61","name":"Benoni Defense: Knight's Tour Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f3d2","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -"},{"eco":"A61","name":"Benoni Defense: Uhlmann Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 c1g5","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP2B1/8/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"A62","name":"Benoni Defense: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"A63","name":"Benoni Defense: Fianchetto Variation, Hastings Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 b8d7","epd":"r1bq1rk1/pp1n1pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A64","name":"Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Re8","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 f1g2 f8g7 g1f3 e8g8 e1g1 a7a6 a2a4 b8d7 f3d2 f8e8","epd":"r1bqr1k1/1p1n1pbp/p2p1np1/2pP4/P7/2N3P1/1P1NPPBP/R1BQ1RK1 w - -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4","epd":"rnbqkb1r/pp3ppp/3p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 Bg7","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f3 f8g7","epd":"rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2P2/PP4PP/R1BQKBNR w KQkq -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line","pgn":"1. d4 Nf6 2. c4 g6 3. f3 c5 4. d5 d6 5. e4 Bg7 6. Nc3 e6 7. Be3 O-O 8. Qd2 exd5 9. cxd5","uci":"d2d4 g8f6 c2c4 g7g6 f2f3 c7c5 d4d5 d7d6 e2e4 f8g7 b1c3 e7e6 c1e3 e8g8 d1d2 e6d5 c4d5","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N1BP2/PP1Q2PP/R3KBNR b KQ -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Be3","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 Bg7 8. Be3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f3 f8g7 c1e3","epd":"rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N1BP2/PP4PP/R2QKBNR b KQkq -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Bg5","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5 c7c5 d4d5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2pP2B1/2P1P3/2N2P2/PP4PP/R2QKBNR b KQ -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Bg5","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 Bg7 8. Bg5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f3 f8g7 c1g5","epd":"rnbqk2r/pp3pbp/3p1np1/2pP2B1/4P3/2N2P2/PP4PP/R2QKBNR b KQkq -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Bg5","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. exd5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5 c7c5 d4d5 e7e6 d1d2 e6d5 e4d5","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP2B1/2P5/2N2P2/PP1Q2PP/R3KBNR b KQ -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Nge2","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f3 Bg7 8. Nge2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f3 f8g7 g1e2","epd":"rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2P2/PP2N1PP/R1BQKB1R b KQkq -"},{"eco":"A65","name":"Benoni Defense: King's Pawn Line, with Nge2","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2 c5 7. d5 e6 8. Ng3 exd5 9. cxd5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 g1e2 c7c5 d4d5 e7e6 e2g3 e6d5 c4d5","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2PN1/PP4PP/R1BQKB1R b KQ -"},{"eco":"A66","name":"Benoni Defense: Mikenas Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. e5","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 e4e5","epd":"rnbqk2r/pp3pbp/3p1np1/2pPP3/5P2/2N5/PP4PP/R1BQKBNR b KQkq -"},{"eco":"A66","name":"Benoni Defense: Pawn Storm Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP4/4PP2/2N5/PP4PP/R1BQKBNR b KQkq -"},{"eco":"A67","name":"Benoni Defense: Taimanov Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 f1b5","epd":"rnbqk2r/pp3pbp/3p1np1/1BpP4/4PP2/2N5/PP4PP/R1BQK1NR b KQkq -"},{"eco":"A68","name":"Benoni Defense: Four Pawns Attack","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP4PP/R1BQKB1R w KQ -"},{"eco":"A68","name":"Benoni Defense: Four Pawns Attack","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R b KQ -"},{"eco":"A69","name":"Benoni Defense: Four Pawns Attack, Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2 Re8","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2 f8e8","epd":"rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ -"},{"eco":"A69","name":"Benoni Defense: Four Pawns Attack, Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2 Nbd7 10. O-O Re8","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2 b8d7 e1g1 f8e8","epd":"r1bqr1k1/pp1n1pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQ1RK1 w - -"},{"eco":"A69","name":"Benoni Defense: Four Pawns Attack, Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2 Nbd7 10. O-O Re8 11. Nd2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2 b8d7 e1g1 f8e8 f3d2","epd":"r1bqr1k1/pp1n1pbp/3p1np1/2pP4/4PP2/2N5/PP1NB1PP/R1BQ1RK1 b - -"},{"eco":"A69","name":"Benoni Defense: Four Pawns Attack, Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Be2 a6 10. a4 Re8 11. Nd2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 f2f4 f8g7 g1f3 e8g8 f1e2 a7a6 a2a4 f8e8 f3d2","epd":"rnbqr1k1/1p3pbp/p2p1np1/2pP4/P3PP2/2N5/1P1NB1PP/R1BQK2R b KQ -"},{"eco":"A70","name":"Benoni Defense: Classical Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4","epd":"rnbqkb1r/pp3p1p/3p1np1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"A70","name":"Benoni Defense: Classical Variation, New York Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. h3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 h2h3","epd":"rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N1P/PP3PP1/R1BQKB1R b KQkq -"},{"eco":"A70","name":"Benoni Defense: Classical Variation, Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2","epd":"rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R b KQkq -"},{"eco":"A71","name":"Benoni Defense: Classical Variation, Averbakh-Grivas Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 c1g5","epd":"rnbqk2r/pp3pbp/3p1np1/2pP2B1/4P3/2N2N2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"A72","name":"Benoni Defense: Classical Variation","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"A73","name":"Benoni Defense: Classical Variation, Main Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1","epd":"rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 b - -"},{"eco":"A74","name":"Benoni Defense: Classical Variation, Full Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O a6 10. a4","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4","epd":"rnbq1rk1/1p3pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 b - -"},{"eco":"A75","name":"Benoni Defense: Classical Variation, Argentine Counterattack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O a6 10. a4 Bg4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 a7a6 a2a4 c8g4","epd":"rn1q1rk1/1p3pbp/p2p1np1/2pP4/P3P1b1/2N2N2/1P2BPPP/R1BQ1RK1 w - -"},{"eco":"A76","name":"Benoni Defense: Classical Variation, Czerniak Defense","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8","epd":"rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"A77","name":"Benoni Defense: Classical Variation, Czerniak Defense, Tal Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2","epd":"rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b - -"},{"eco":"A77","name":"Benoni Defense: Classical Variation, Czerniak Defense, Tal Line","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Nbd7","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8d7","epd":"r1bqr1k1/pp1n1pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - -"},{"eco":"A78","name":"Benoni Defense: Classical Variation, Czerniak Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 e6d5 c4d5 d7d6 b1c3 g7g6 e2e4 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6","epd":"r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - -"},{"eco":"A79","name":"Benoni Defense: Classical Variation, Czerniak Defense","pgn":"1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 9. O-O Re8 10. Nd2 Na6 11. f3","uci":"d2d4 g8f6 c2c4 c7c5 d4d5 e7e6 b1c3 e6d5 c4d5 d7d6 e2e4 g7g6 g1f3 f8g7 f1e2 e8g8 e1g1 f8e8 f3d2 b8a6 f2f3","epd":"r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N2P2/PP1NB1PP/R1BQ1RK1 b - -"},{"eco":"A80","name":"Dutch Defense","pgn":"1. d4 f5","uci":"d2d4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"A80","name":"Dutch Defense: Alapin Variation","pgn":"1. d4 f5 2. Qd3","uci":"d2d4 f7f5 d1d3","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Barcza Variation","pgn":"1. d4 f5 2. Nf3 Nf6 3. c3","uci":"d2d4 f7f5 g1f3 g8f6 c2c3","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/3P4/2P2N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"A80","name":"Dutch Defense: Hevendehl Gambit","pgn":"1. d4 f5 2. g4 e5","uci":"d2d4 f7f5 g2g4 e7e5","epd":"rnbqkbnr/pppp2pp/8/4pp2/3P2P1/8/PPP1PP1P/RNBQKBNR w KQkq -"},{"eco":"A80","name":"Dutch Defense: Hopton Attack","pgn":"1. d4 f5 2. Bg5","uci":"d2d4 f7f5 c1g5","epd":"rnbqkbnr/ppppp1pp/8/5pB1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Janzen-Korchnoi Gambit","pgn":"1. d4 f5 2. h3 Nf6 3. g4","uci":"d2d4 f7f5 h2h3 g8f6 g2g4","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/7P/PPP1PP2/RNBQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Kingfisher Gambit","pgn":"1. d4 f5 2. Nc3 d5 3. e4","uci":"d2d4 f7f5 b1c3 d7d5 e2e4","epd":"rnbqkbnr/ppp1p1pp/8/3p1p2/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Korchnoi Attack","pgn":"1. d4 f5 2. h3","uci":"d2d4 f7f5 h2h3","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P4/7P/PPP1PPP1/RNBQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Krejcik Gambit","pgn":"1. d4 f5 2. g4","uci":"d2d4 f7f5 g2g4","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Krejcik Gambit, Tate Gambit","pgn":"1. d4 f5 2. g4 fxg4 3. e4 d5 4. Nc3","uci":"d2d4 f7f5 g2g4 f5g4 e2e4 d7d5 b1c3","epd":"rnbqkbnr/ppp1p1pp/8/3p4/3PP1p1/2N5/PPP2P1P/R1BQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Manhattan Gambit, Anti-Classical Line","pgn":"1. d4 f5 2. Qd3 e6 3. g4","uci":"d2d4 f7f5 d1d3 e7e6 g2g4","epd":"rnbqkbnr/pppp2pp/4p3/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Manhattan Gambit, Anti-Leningrad","pgn":"1. d4 f5 2. Qd3 g6 3. g4","uci":"d2d4 f7f5 d1d3 g7g6 g2g4","epd":"rnbqkbnr/ppppp2p/6p1/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Manhattan Gambit, Anti-Modern","pgn":"1. d4 f5 2. Qd3 d6 3. g4","uci":"d2d4 f7f5 d1d3 d7d6 g2g4","epd":"rnbqkbnr/ppp1p1pp/3p4/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Manhattan Gambit, Anti-Stonewall","pgn":"1. d4 f5 2. Qd3 d5 3. g4","uci":"d2d4 f7f5 d1d3 d7d5 g2g4","epd":"rnbqkbnr/ppp1p1pp/8/3p1p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Omega-Isis Gambit","pgn":"1. d4 f5 2. Nf3 e5","uci":"d2d4 f7f5 g1f3 e7e5","epd":"rnbqkbnr/pppp2pp/8/4pp2/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"A80","name":"Dutch Defense: Raphael Variation","pgn":"1. d4 f5 2. Nc3","uci":"d2d4 f7f5 b1c3","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Senechaud Gambit","pgn":"1. d4 f5 2. Bf4 e6 3. g4","uci":"d2d4 f7f5 c1f4 e7e6 g2g4","epd":"rnbqkbnr/pppp2pp/4p3/5p2/3P1BP1/8/PPP1PP1P/RN1QKBNR b KQkq -"},{"eco":"A80","name":"Dutch Defense: Spielmann Gambit","pgn":"1. d4 f5 2. Nc3 Nf6 3. g4","uci":"d2d4 f7f5 b1c3 g8f6 g2g4","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/2N5/PPP1PP1P/R1BQKBNR b KQkq -"},{"eco":"A80","name":"Queen's Pawn Game: Veresov Attack, Dutch System","pgn":"1. d4 f5 2. Nc3 d5","uci":"d2d4 f7f5 b1c3 d7d5","epd":"rnbqkbnr/ppp1p1pp/8/3p1p2/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"A81","name":"Dutch Defense: Blackburne Variation","pgn":"1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3","uci":"d2d4 f7f5 g2g3 g8f6 f1g2 e7e6 g1h3","epd":"rnbqkb1r/pppp2pp/4pn2/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -"},{"eco":"A81","name":"Dutch Defense: Fianchetto Attack","pgn":"1. d4 f5 2. g3","uci":"d2d4 f7f5 g2g3","epd":"rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"A81","name":"Dutch Defense: Leningrad Variation, Carlsbad Variation","pgn":"1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3","uci":"d2d4 f7f5 g2g3 g7g6 f1g2 f8g7 g1h3","epd":"rnbqk1nr/ppppp1bp/6p1/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -"},{"eco":"A81","name":"Dutch Defense: Leningrad, Basman System","pgn":"1. d4 f5 2. g3 c6 3. Bg2 g6 4. Nf3 Bg7 5. O-O Nh6","uci":"d2d4 f7f5 g2g3 c7c6 f1g2 g7g6 g1f3 f8g7 e1g1 g8h6","epd":"rnbqk2r/pp1pp1bp/2p3pn/5p2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -"},{"eco":"A81","name":"Dutch Defense: Semi-Leningrad Variation","pgn":"1. d4 f5 2. g3 Nf6 3. Bg2 g6","uci":"d2d4 f7f5 g2g3 g8f6 f1g2 g7g6","epd":"rnbqkb1r/ppppp2p/5np1/5p2/3P4/6P1/PPP1PPBP/RNBQK1NR w KQkq -"},{"eco":"A82","name":"Dutch Defense: Blackmar's Second Gambit","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. f3","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 f2f3","epd":"rnbqkb1r/ppppp1pp/5n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"A82","name":"Dutch Defense: Staunton Gambit","pgn":"1. d4 f5 2. e4","uci":"d2d4 f7f5 e2e4","epd":"rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"A82","name":"Dutch Defense: Staunton Gambit Accepted","pgn":"1. d4 f5 2. e4 fxe4","uci":"d2d4 f7f5 e2e4 f5e4","epd":"rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"A82","name":"Dutch Defense: Staunton Gambit, American Attack","pgn":"1. d4 f5 2. e4 fxe4 3. Nd2","uci":"d2d4 f7f5 e2e4 f5e4 b1d2","epd":"rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPPN1PPP/R1BQKBNR b KQkq -"},{"eco":"A82","name":"Dutch Defense: Staunton Gambit, Tartakower Variation","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. g4","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 g2g4","epd":"rnbqkb1r/ppppp1pp/5n2/8/3Pp1P1/2N5/PPP2P1P/R1BQKBNR b KQkq -"},{"eco":"A82","name":"Rat Defense: Balogh Defense","pgn":"1. e4 d6 2. d4 f5","uci":"e2e4 d7d6 d2d4 f7f5","epd":"rnbqkbnr/ppp1p1pp/3p4/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"A83","name":"Dutch Defense: Staunton Gambit","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5","epd":"rnbqkb1r/ppppp1pp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"A83","name":"Dutch Defense: Staunton Gambit, Alekhine Variation","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. h4","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 h2h4","epd":"rnbqkb1r/ppppp2p/5np1/6B1/3Pp2P/2N5/PPP2PP1/R2QKBNR b KQkq -"},{"eco":"A83","name":"Dutch Defense: Staunton Gambit, Chigorin Variation","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 c6","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 c7c6","epd":"rnbqkb1r/pp1pp1pp/2p2n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -"},{"eco":"A83","name":"Dutch Defense: Staunton Gambit, Lasker Variation","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. f3","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 g7g6 f2f3","epd":"rnbqkb1r/ppppp2p/5np1/6B1/3Pp3/2N2P2/PPP3PP/R2QKBNR b KQkq -"},{"eco":"A83","name":"Dutch Defense: Staunton Gambit, Nimzowitsch Variation","pgn":"1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 b6","uci":"d2d4 f7f5 e2e4 f5e4 b1c3 g8f6 c1g5 b7b6","epd":"rnbqkb1r/p1ppp1pp/1p3n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -"},{"eco":"A84","name":"Dutch Defense","pgn":"1. d4 f5 2. c4","uci":"d2d4 f7f5 c2c4","epd":"rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"A84","name":"Dutch Defense: Bellon Gambit","pgn":"1. d4 f5 2. c4 e6 3. e4","uci":"d2d4 f7f5 c2c4 e7e6 e2e4","epd":"rnbqkbnr/pppp2pp/4p3/5p2/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"A84","name":"Dutch Defense: Bladel Variation","pgn":"1. d4 f5 2. c4 g6 3. Nc3 Nh6","uci":"d2d4 f7f5 c2c4 g7g6 b1c3 g8h6","epd":"rnbqkb1r/ppppp2p/6pn/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"A84","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 e6","uci":"d2d4 f7f5 c2c4 e7e6","epd":"rnbqkbnr/pppp2pp/4p3/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A84","name":"Dutch Defense: Krause Variation","pgn":"1. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Nf3 Nc6","uci":"d2d4 f7f5 c2c4 g8f6 b1c3 d7d6 g1f3 b8c6","epd":"r1bqkb1r/ppp1p1pp/2np1n2/5p2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"A84","name":"Dutch Defense: Normal Variation","pgn":"1. d4 f5 2. c4 Nf6","uci":"d2d4 f7f5 c2c4 g8f6","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"A84","name":"Dutch Defense: Rubinstein Variation","pgn":"1. d4 f5 2. c4 e6 3. Nc3","uci":"d2d4 f7f5 c2c4 e7e6 b1c3","epd":"rnbqkbnr/pppp2pp/4p3/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"A85","name":"Dutch Defense: Queen's Knight Variation","pgn":"1. d4 f5 2. c4 Nf6 3. Nc3","uci":"d2d4 f7f5 c2c4 g8f6 b1c3","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"A86","name":"Dutch Defense: Fianchetto Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3","epd":"rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"A86","name":"Dutch Defense: Hort-Antoshin System","pgn":"1. d4 f5 2. c4 Nf6 3. g3 d6 4. Bg2 c6 5. Nc3 Qc7","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 d7d6 f1g2 c7c6 b1c3 d8c7","epd":"rnb1kb1r/ppq1p1pp/2pp1n2/5p2/2PP4/2N3P1/PP2PPBP/R1BQK1NR w KQkq -"},{"eco":"A86","name":"Dutch Defense: Leningrad Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 g6","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 g7g6","epd":"rnbqkb1r/ppppp2p/5np1/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -"},{"eco":"A87","name":"Dutch Defense: Leningrad Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 g1f3","epd":"rnbqk2r/ppppp1bp/5np1/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"A88","name":"Dutch Defense: Leningrad Variation, Warsaw Variation","pgn":"1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6","uci":"d2d4 f7f5 g2g3 g8f6 f1g2 g7g6 g1f3 f8g7 e1g1 e8g8 c2c4 d7d6 b1c3 c7c6","epd":"rnbq1rk1/pp2p1bp/2pp1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A89","name":"Dutch Defense: Leningrad Variation, Matulovic Variation","pgn":"1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6","uci":"d2d4 f7f5 g2g3 g8f6 f1g2 g7g6 g1f3 f8g7 e1g1 e8g8 c2c4 d7d6 b1c3 b8c6","epd":"r1bq1rk1/ppp1p1bp/2np1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A90","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2","epd":"rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -"},{"eco":"A90","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 d5 5. Nf3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 d7d5 g1f3","epd":"rnbqkb1r/ppp3pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"A90","name":"Dutch Defense: Nimzo-Dutch Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4","epd":"rnbqk2r/pppp2pp/4pn2/5p2/1bPP4/6P1/PP2PPBP/RNBQK1NR w KQkq -"},{"eco":"A90","name":"Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Bb4+ 5. Bd2 Be7","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8b4 c1d2 b4e7","epd":"rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP1BPPBP/RN1QK1NR w KQkq -"},{"eco":"A90","name":"Dutch Defense: Stonewall Variation, Modern Variation","pgn":"1. d4 f5 2. c4 e6 3. Nf3 Nf6 4. g3 c6 5. Bg2 d5 6. O-O Bd6","uci":"d2d4 f7f5 c2c4 e7e6 g1f3 g8f6 g2g3 c7c6 f1g2 d7d5 e1g1 f8d6","epd":"rnbqk2r/pp4pp/2pbpn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w kq -"},{"eco":"A91","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7","epd":"rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -"},{"eco":"A91","name":"Dutch Defense: Classical Variation, Blackburne Attack","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nh3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1h3","epd":"rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6PN/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"A92","name":"Dutch Defense: Alekhine Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O Ne4","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 f6e4","epd":"rnbq1rk1/ppppb1pp/4p3/5p2/2PPn3/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"A92","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8","epd":"rnbq1rk1/ppppb1pp/4pn2/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R w KQ -"},{"eco":"A92","name":"Dutch Defense: Stonewall Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3","epd":"rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"A92","name":"Dutch Defense: Stonewall Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5","epd":"rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"A93","name":"Dutch Defense: Stonewall Variation, Botvinnik Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3","epd":"rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -"},{"eco":"A94","name":"Dutch Defense: Stonewall Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. b3 c6 8. Ba3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b2b3 c7c6 c1a3","epd":"rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/BP3NP1/P3PPBP/RN1Q1RK1 b - -"},{"eco":"A95","name":"Dutch Defense: Stonewall Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6","epd":"rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A95","name":"Dutch Defense: Stonewall Variation, Chekhover Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 7. Nc3 c6 8. Qc2 Qe8 9. Bg5","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d5 b1c3 c7c6 d1c2 d8e8 c1g5","epd":"rnb1qrk1/pp2b1pp/2p1pn2/3p1pB1/2PP4/2N2NP1/PPQ1PPBP/R4RK1 b - -"},{"eco":"A96","name":"Dutch Defense: Classical Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6","epd":"rnbq1rk1/ppp1b1pp/3ppn2/5p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"A96","name":"Dutch Defense: Classical Variation, Buenos Aires Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 a5","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 a7a5","epd":"rnbq1rk1/1pp1b1pp/3ppn2/p4p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A96","name":"Dutch Defense: Classical Variation, Huisl Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Ne4","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 f6e4","epd":"rnbq1rk1/ppp1b1pp/3pp3/5p2/2PPn3/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A97","name":"Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8","epd":"rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"A97","name":"Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Re1","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 f1e1","epd":"rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQR1K1 b - -"},{"eco":"A98","name":"Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. Qc2","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 d1c2","epd":"rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PPQ1PPBP/R1B2RK1 b - -"},{"eco":"A99","name":"Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line","pgn":"1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3","uci":"d2d4 f7f5 c2c4 g8f6 g2g3 e7e6 f1g2 f8e7 g1f3 e8g8 e1g1 d7d6 b1c3 d8e8 b2b3","epd":"rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b - -"},{"eco":"B00","name":"Barnes Defense","pgn":"1. e4 f6","uci":"e2e4 f7f6","epd":"rnbqkbnr/ppppp1pp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Borg Defense","pgn":"1. e4 g5","uci":"e2e4 g7g5","epd":"rnbqkbnr/pppppp1p/8/6p1/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Borg Defense: Borg Gambit","pgn":"1. e4 g5 2. d4 Bg7","uci":"e2e4 g7g5 d2d4 f8g7","epd":"rnbqk1nr/ppppppbp/8/6p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Borg Defense: Troon Gambit","pgn":"1. e4 g5 2. d4 h6 3. h4 g4","uci":"e2e4 g7g5 d2d4 h7h6 h2h4 g5g4","epd":"rnbqkbnr/pppppp2/7p/8/3PP1pP/8/PPP2PP1/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Borg Defense: Zilbermints Gambit","pgn":"1. e4 g5 2. d4 e5","uci":"e2e4 g7g5 d2d4 e7e5","epd":"rnbqkbnr/pppp1p1p/8/4p1p1/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Carr Defense","pgn":"1. e4 h6","uci":"e2e4 h7h6","epd":"rnbqkbnr/ppppppp1/7p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Carr Defense: Zilbermints Gambit","pgn":"1. e4 h6 2. d4 e5","uci":"e2e4 h7h6 d2d4 e7e5","epd":"rnbqkbnr/pppp1pp1/7p/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Duras Gambit","pgn":"1. e4 f5","uci":"e2e4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Fried Fox Defense","pgn":"1. e4 f6 2. d4 Kf7","uci":"e2e4 f7f6 d2d4 e8f7","epd":"rnbq1bnr/pppppkpp/5p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQ -"},{"eco":"B00","name":"Goldsmith Defense","pgn":"1. e4 h5","uci":"e2e4 h7h5","epd":"rnbqkbnr/ppppppp1/8/7p/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Goldsmith Defense: Picklepuss Defense","pgn":"1. e4 h5 2. d4 Nf6","uci":"e2e4 h7h5 d2d4 g8f6","epd":"rnbqkb1r/ppppppp1/5n2/7p/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Hippopotamus Defense","pgn":"1. e4 Nh6","uci":"e2e4 g8h6","epd":"rnbqkb1r/pppppppp/7n/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Hippopotamus Defense","pgn":"1. e4 Nh6 2. d4 g6 3. c4 f6","uci":"e2e4 g8h6 d2d4 g7g6 c2c4 f7f6","epd":"rnbqkb1r/ppppp2p/5ppn/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"King's Pawn Game","pgn":"1. e4","uci":"e2e4","epd":"rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Lemming Defense","pgn":"1. e4 Na6","uci":"e2e4 b8a6","epd":"r1bqkbnr/pppppppp/n7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Lion Defense: Lion's Jaw","pgn":"1. e4 d6 2. d4 Nf6 3. f3","uci":"e2e4 d7d6 d2d4 g8f6 f2f3","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense","pgn":"1. e4 Nc6","uci":"e2e4 b8c6","epd":"r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense","pgn":"1. e4 Nc6 2. d4","uci":"e2e4 b8c6 d2d4","epd":"r1bqkbnr/pppppppp/2n5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Breyer Variation","pgn":"1. e4 Nc6 2. 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Nc3 e5","uci":"e2e4 b8c6 d2d4 d7d5 b1c3 e7e5","epd":"r1bqkbnr/ppp2ppp/2n5/3pp3/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch Gambit","pgn":"1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Ne5","uci":"e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5 c6e5","epd":"r1bqkbnr/ppp1pppp/8/3Pn3/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Richter Gambit","pgn":"1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5 Nb8 5. f3","uci":"e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5 c6b8 f2f3","epd":"rnbqkbnr/ppp1pppp/8/3P4/4p3/2N2P2/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Vehre Variation","pgn":"1. e4 Nc6 2. d4 d5 3. Nc3 Nf6","uci":"e2e4 b8c6 d2d4 d7d5 b1c3 g8f6","epd":"r1bqkb1r/ppp1pppp/2n2n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Scandinavian Variation, Exchange Variation","pgn":"1. e4 Nc6 2. d4 d5 3. exd5 Qxd5","uci":"e2e4 b8c6 d2d4 d7d5 e4d5 d8d5","epd":"r1b1kbnr/ppp1pppp/2n5/3q4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Scandinavian Variation, Exchange Variation, Marshall Gambit","pgn":"1. e4 Nc6 2. d4 d5 3. exd5 Qxd5 4. Nc3","uci":"e2e4 b8c6 d2d4 d7d5 e4d5 d8d5 b1c3","epd":"r1b1kbnr/ppp1pppp/2n5/3q4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Wheeler Gambit","pgn":"1. e4 Nc6 2. b4","uci":"e2e4 b8c6 b2b4","epd":"r1bqkbnr/pppppppp/2n5/8/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Williams Variation","pgn":"1. e4 Nc6 2. Nf3 d6","uci":"e2e4 b8c6 g1f3 d7d6","epd":"r1bqkbnr/ppp1pppp/2np4/8/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"B00","name":"Nimzowitsch Defense: Woodchuck Variation","pgn":"1. e4 Nc6 2. d4 a6","uci":"e2e4 b8c6 d2d4 a7a6","epd":"r1bqkbnr/1ppppppp/p1n5/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Owen Defense","pgn":"1. e4 b6","uci":"e2e4 b7b6","epd":"rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Owen Defense: Guatemala Defense","pgn":"1. e4 b6 2. d4 Ba6","uci":"e2e4 b7b6 d2d4 c8a6","epd":"rn1qkbnr/p1pppppp/bp6/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Owen Defense: Hekili-Loa Gambit","pgn":"1. e4 b6 2. d4 c5 3. dxc5 Nc6","uci":"e2e4 b7b6 d2d4 c7c5 d4c5 b8c6","epd":"r1bqkbnr/p2ppppp/1pn5/2P5/4P3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Owen Defense: Matovinsky Gambit","pgn":"1. e4 b6 2. d4 Bb7 3. Bd3 f5 4. exf5 Bxg2 5. Qh5+ g6","uci":"e2e4 b7b6 d2d4 c8b7 f1d3 f7f5 e4f5 b7g2 d1h5 g7g6","epd":"rn1qkbnr/p1ppp2p/1p4p1/5P1Q/3P4/3B4/PPP2PbP/RNB1K1NR w KQkq -"},{"eco":"B00","name":"Owen Defense: Naselwaus Gambit","pgn":"1. e4 b6 2. d4 Bb7 3. Bg5","uci":"e2e4 b7b6 d2d4 c8b7 c1g5","epd":"rn1qkbnr/pbpppppp/1p6/6B1/3PP3/8/PPP2PPP/RN1QKBNR b KQkq -"},{"eco":"B00","name":"Owen Defense: Smith Gambit","pgn":"1. e4 b6 2. d4 Bb7 3. Nf3","uci":"e2e4 b7b6 d2d4 c8b7 g1f3","epd":"rn1qkbnr/pbpppppp/1p6/8/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B00","name":"Owen Defense: Unicorn Variation","pgn":"1. e4 f6 2. d4 b6 3. c4 Bb7","uci":"e2e4 f7f6 d2d4 b7b6 c2c4 c8b7","epd":"rn1qkbnr/pbppp1pp/1p3p2/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Owen Defense: Wind Gambit","pgn":"1. e4 b6 2. d4 Bb7 3. f3 e5","uci":"e2e4 b7b6 d2d4 c8b7 f2f3 e7e5","epd":"rn1qkbnr/pbpp1ppp/1p6/4p3/3PP3/5P2/PPP3PP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Pirc Defense","pgn":"1. e4 d6","uci":"e2e4 d7d6","epd":"rnbqkbnr/ppp1pppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Pirc Defense","pgn":"1. e4 d6 2. d4","uci":"e2e4 d7d6 d2d4","epd":"rnbqkbnr/ppp1pppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Pirc Defense","pgn":"1. e4 d6 2. d4 Nf6","uci":"e2e4 d7d6 d2d4 g8f6","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Pirc Defense: Roscher Gambit","pgn":"1. e4 d6 2. d4 Nf6 3. Nf3","uci":"e2e4 d7d6 d2d4 g8f6 g1f3","epd":"rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B00","name":"Rat Defense: Antal Defense","pgn":"1. e4 d6 2. d4 Nd7","uci":"e2e4 d7d6 d2d4 b8d7","epd":"r1bqkbnr/pppnpppp/3p4/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Rat Defense: Fuller Gambit","pgn":"1. e4 d6 2. f4 d5 3. exd5 Nf6","uci":"e2e4 d7d6 f2f4 d6d5 e4d5 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/3P4/5P2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Rat Defense: Harmonist","pgn":"1. e4 d6 2. f4","uci":"e2e4 d7d6 f2f4","epd":"rnbqkbnr/ppp1pppp/3p4/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Rat Defense: Petruccioli Attack","pgn":"1. e4 d6 2. h4","uci":"e2e4 d7d6 h2h4","epd":"rnbqkbnr/ppp1pppp/3p4/8/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq -"},{"eco":"B00","name":"Rat Defense: Spike Attack","pgn":"1. e4 d6 2. g4","uci":"e2e4 d7d6 g2g4","epd":"rnbqkbnr/ppp1pppp/3p4/8/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq -"},{"eco":"B00","name":"St. George Defense","pgn":"1. e4 a6","uci":"e2e4 a7a6","epd":"rnbqkbnr/1ppppppp/p7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"St. George Defense: Polish Variation","pgn":"1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 e6","uci":"e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 e7e6","epd":"rn1qkbnr/1bpp1ppp/p3p3/1p6/3PP3/3B1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"B00","name":"St. George Defense: San Jorge Variation","pgn":"1. e4 a6 2. d4 b5 3. Nf3 Bb7 4. Bd3 d6 5. O-O g6 6. c3 Bg7","uci":"e2e4 a7a6 d2d4 b7b5 g1f3 c8b7 f1d3 d7d6 e1g1 g7g6 c2c3 f8g7","epd":"rn1qk1nr/1bp1ppbp/p2p2p1/1p6/3PP3/2PB1N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"B00","name":"St. George Defense: Zilbermints Gambit","pgn":"1. e4 a6 2. d4 e5","uci":"e2e4 a7a6 d2d4 e7e5","epd":"rnbqkbnr/1ppp1ppp/p7/4p3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Van Geet Opening: Berlin Gambit","pgn":"1. e4 Nc6 2. d4 d5 3. Nc3 dxe4 4. d5","uci":"e2e4 b8c6 d2d4 d7d5 b1c3 d5e4 d4d5","epd":"r1bqkbnr/ppp1pppp/2n5/3P4/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"B00","name":"Ware Defense","pgn":"1. e4 a5","uci":"e2e4 a7a5","epd":"rnbqkbnr/1ppppppp/8/p7/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B00","name":"Ware Defense: Snagglepuss Defense","pgn":"1. e4 a5 2. d4 Nc6","uci":"e2e4 a7a5 d2d4 b8c6","epd":"r1bqkbnr/1ppppppp/2n5/p7/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense","pgn":"1. e4 d5","uci":"e2e4 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense","pgn":"1. e4 d5 2. b3","uci":"e2e4 d7d5 b2b3","epd":"rnbqkbnr/ppp1pppp/8/3p4/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Anderssen Counterattack","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5","epd":"rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Anderssen Counterattack, Collijn Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3 Bg4","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3 c8g4","epd":"rn2kbnr/ppp2ppp/8/q3p3/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Anderssen Counterattack, Goteborg System","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. Nf3","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 g1f3","epd":"rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Anderssen Counterattack, Orthodox Attack","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 e5 5. dxe5 Nc6 6. Nf3 Bb4 7. Bd2","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 e7e5 d4e5 b8c6 g1f3 f8b4 c1d2","epd":"r1b1k1nr/ppp2ppp/2n5/q3P3/1b6/2N2N2/PPPB1PPP/R2QKB1R b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Blackburne Gambit","pgn":"1. e4 d5 2. exd5 c6 3. dxc6 Nxc6","uci":"e2e4 d7d5 e4d5 c7c6 d5c6 b8c6","epd":"r1bqkbnr/pp2pppp/2n5/8/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Blackburne-Kloosterboer Gambit","pgn":"1. e4 d5 2. exd5 c6","uci":"e2e4 d7d5 e4d5 c7c6","epd":"rnbqkbnr/pp2pppp/2p5/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Boehnke Gambit","pgn":"1. e4 d5 2. exd5 e5 3. dxe6 Bxe6","uci":"e2e4 d7d5 e4d5 e7e5 d5e6 c8e6","epd":"rn1qkbnr/ppp2ppp/4b3/8/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Bronstein Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 g1f3 a7a6","epd":"rnb1kb1r/1pp1pppp/p2q1n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Classical Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5","epd":"rn2kb1r/ppp1pppp/5n2/q4b2/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Grünfeld Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. g4","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8f5 f3e5 c7c6 g2g4","epd":"rn2kb1r/pp2pppp/2p2n2/q3Nb2/3P2P1/2N5/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Gubinsky-Melts Defense","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d6","epd":"rnb1kbnr/ppp1pppp/3q4/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Icelandic-Palme Gambit","pgn":"1. e4 d5 2. exd5 Nf6 3. c4 e6","uci":"e2e4 d7d5 e4d5 g8f6 c2c4 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Kiel Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nb4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 c2c4 d5b4","epd":"rnbqkb1r/ppp1pppp/8/8/1nPP4/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Kloosterboer Gambit","pgn":"1. e4 d5 2. exd5 c6 3. dxc6 e5","uci":"e2e4 d7d5 e4d5 c7c6 d5c6 e7e5","epd":"rnbqkbnr/pp3ppp/2P5/4p3/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Kádas Gambit","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 c6 4. dxc6 e5","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c7c6 d5c6 e7e5","epd":"rnbqkb1r/pp3ppp/2P2n2/4p3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Lasker Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bg4 6. h3","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6 g1f3 c8g4 h2h3","epd":"rn2kb1r/ppp1pppp/5n2/q7/3P2b1/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Main Line","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5","epd":"rnb1kbnr/ppp1pppp/8/q7/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Main Line, Leonhardt Gambit","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 b2b4","epd":"rnb1kbnr/ppp1pppp/8/q7/1P6/2N5/P1PP1PPP/R1BQKBNR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Main Line, Mieses Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5a5 d2d4 g8f6","epd":"rnb1kb1r/ppp1pppp/5n2/q7/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Marshall Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Nxd5","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 f6d5","epd":"rnbqkb1r/ppp1pppp/8/3n4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Mieses-Kotroc Variation","pgn":"1. e4 d5 2. exd5 Qxd5","uci":"e2e4 d7d5 e4d5 d8d5","epd":"rnb1kbnr/ppp1pppp/8/3q4/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Modern Variation","pgn":"1. e4 d5 2. exd5 Nf6","uci":"e2e4 d7d5 e4d5 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Modern Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4","epd":"rnbqkb1r/ppp1pppp/5n2/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Modern Variation, Gipslis Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Bg4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 c8g4","epd":"rn1qkb1r/ppp1pppp/8/3n4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Modern Variation, Wing Gambit","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 g6 4. c4 b5","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 g7g6 c2c4 b7b5","epd":"rnbqkb1r/p1p1pp1p/5np1/1p1P4/2PP4/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Panov Transfer","pgn":"1. e4 d5 2. exd5 Nf6 3. c4 c6","uci":"e2e4 d7d5 e4d5 g8f6 c2c4 c7c6","epd":"rnbqkb1r/pp2pppp/2p2n2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4","epd":"rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit, Banker Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. c4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 c2c4","epd":"rn1qkb1r/ppp1pppp/5n2/3P1b2/2PP4/5P2/PP4PP/RNBQKBNR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit, Classical Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. 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Bb5+ Nbd7 6. c4","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 c2c4","epd":"r2qkb1r/pppnpppp/5n2/1B1P1b2/2PP4/5P2/PP4PP/RNBQK1NR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit, Lusophobe Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Bb5+ Nbd7 5. Be2","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1b5 b8d7 b5e2","epd":"r2qkb1r/pppnpppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. Bb5+ Nbd7 6. Nc3","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f2f3 g4f5 f1b5 b8d7 b1c3","epd":"r2qkb1r/pppnpppp/5n2/1B1P1b2/3P4/2N2P2/PPP3PP/R1BQK1NR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Portuguese Gambit, Wuss Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Be2","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 c8g4 f1e2","epd":"rn1qkb1r/ppp1pppp/5n2/3P4/3P2b1/8/PPP1BPPP/RNBQK1NR b KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Richter Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 g6","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 f6d5 g1f3 g7g6","epd":"rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Richter Variation","pgn":"1. e4 d5 2. exd5 Nf6 3. d4 g6","uci":"e2e4 d7d5 e4d5 g8f6 d2d4 g7g6","epd":"rnbqkb1r/ppp1pp1p/5np1/3P4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Schiller-Pytel Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 c6","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 c7c6","epd":"rnb1kbnr/pp2pppp/2pq4/8/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Schiller-Pytel Variation, Modern Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Bc4 c6 6. Nge2 Bf5 7. Bf4 Qb4","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d6 d2d4 g8f6 f1c4 c7c6 g1e2 c8f5 c1f4 d6b4","epd":"rn2kb1r/pp2pppp/2p2n2/5b2/1qBP1B2/2N5/PPP1NPPP/R2QK2R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Valencian Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d8","epd":"rnbqkbnr/ppp1pppp/8/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Valencian Variation, Ilundain Variation","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 c6","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c7c6","epd":"rnbqkb1r/pp2pppp/2p2n2/8/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Valencian Variation, Main Line","pgn":"1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 Bg4","uci":"e2e4 d7d5 e4d5 d8d5 b1c3 d5d8 d2d4 g8f6 g1f3 c8g4","epd":"rn1qkb1r/ppp1pppp/5n2/8/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B01","name":"Scandinavian Defense: Zilbermints Gambit","pgn":"1. e4 d5 2. b4","uci":"e2e4 d7d5 b2b4","epd":"rnbqkbnr/ppp1pppp/8/3p4/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B01","name":"Van Geet Opening: Grünfeld Defense","pgn":"1. e4 d5 2. Nc3 dxe4 3. Nxe4 e5","uci":"e2e4 d7d5 b1c3 d5e4 c3e4 e7e5","epd":"rnbqkbnr/ppp2ppp/8/4p3/4N3/8/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense","pgn":"1. e4 Nf6","uci":"e2e4 g8f6","epd":"rnbqkb1r/pppppppp/5n2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Brooklyn Variation","pgn":"1. e4 Nf6 2. e5 Ng8","uci":"e2e4 g8f6 e4e5 f6g8","epd":"rnbqkbnr/pppppppp/8/4P3/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Brooklyn Variation, Everglades Variation","pgn":"1. e4 Nf6 2. e5 Ng8 3. d4 f5","uci":"e2e4 g8f6 e4e5 f6g8 d2d4 f7f5","epd":"rnbqkbnr/ppppp1pp/8/4Pp2/3P4/8/PPP2PPP/RNBQKBNR w KQkq f6"},{"eco":"B02","name":"Alekhine Defense: Buckley Attack","pgn":"1. e4 Nf6 2. e5 Nd5 3. Na3","uci":"e2e4 g8f6 e4e5 f6d5 b1a3","epd":"rnbqkb1r/pppppppp/8/3nP3/8/N7/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Hunt Variation, Lasker Simul Gambit","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3","epd":"rnbqkb1r/pppp1ppp/4p3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Hunt Variation, Matsukevich Gambit","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Nc3 Nxc3 6. dxc3 d6 7. Bg5","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 b1c3 d5c3 d2c3 d7d6 c1g5","epd":"rnbqkb1r/ppp1pppp/3p4/2P1P1B1/8/2P5/PP3PPP/R2QKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Hunt Variation, Mikenas Gambit","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6 7. Nxd5 exd5 8. Bxd5","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6 c3d5 e6d5 c4d5","epd":"rnbqkb1r/ppp2ppp/3p4/2PBP3/8/8/PP1P1PPP/R1BQK1NR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Kmoch Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 c5 5. d3","uci":"e2e4 g8f6 e4e5 f6d5 f1c4 d5b6 c4b3 c7c5 d2d3","epd":"rnbqkb1r/pp1ppppp/1n6/2p1P3/8/1B1P4/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Krejcik Variation","pgn":"1. e4 Nf6 2. Bc4","uci":"e2e4 g8f6 f1c4","epd":"rnbqkb1r/pppppppp/5n2/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Krejcik Variation, Krejcik Gambit","pgn":"1. e4 Nf6 2. Bc4 Nxe4 3. Bxf7+","uci":"e2e4 g8f6 f1c4 f6e4 c4f7","epd":"rnbqkb1r/pppppBpp/8/8/4n3/8/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Maróczy Variation","pgn":"1. e4 Nf6 2. d3","uci":"e2e4 g8f6 d2d3","epd":"rnbqkb1r/pppppppp/5n2/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Mokele Mbembe","pgn":"1. e4 Nf6 2. e5 Ne4","uci":"e2e4 g8f6 e4e5 f6e4","epd":"rnbqkb1r/pppppppp/8/4P3/4n3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Mokele Mbembe, Modern Line","pgn":"1. e4 Nf6 2. e5 Ne4 3. d4 f6","uci":"e2e4 g8f6 e4e5 f6e4 d2d4 f7f6","epd":"rnbqkb1r/ppppp1pp/5p2/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Mokele Mbembe, Vavra Defense","pgn":"1. e4 Nf6 2. e5 Ne4 3. d4 e6","uci":"e2e4 g8f6 e4e5 f6e4 d2d4 e7e6","epd":"rnbqkb1r/pppp1ppp/4p3/4P3/3Pn3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Normal Variation","pgn":"1. e4 Nf6 2. e5 Nd5","uci":"e2e4 g8f6 e4e5 f6d5","epd":"rnbqkb1r/pppppppp/8/3nP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Scandinavian Variation","pgn":"1. e4 Nf6 2. Nc3 d5","uci":"e2e4 g8f6 b1c3 d7d5","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Scandinavian Variation, Geschev Gambit","pgn":"1. e4 Nf6 2. Nc3 d5 3. exd5 c6","uci":"e2e4 g8f6 b1c3 d7d5 e4d5 c7c6","epd":"rnbqkb1r/pp2pppp/2p2n2/3P4/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Scandinavian Variation, Myers Gambit","pgn":"1. e4 Nf6 2. Nc3 d5 3. d3 dxe4 4. Bg5","uci":"e2e4 g8f6 b1c3 d7d5 d2d3 d5e4 c1g5","epd":"rnbqkb1r/ppp1pppp/5n2/6B1/4p3/2NP4/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Spielmann Gambit","pgn":"1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6","uci":"e2e4 g8f6 b1c3 d7d5 e4e5 f6d7 e5e6","epd":"rnbqkb1r/pppnpppp/4P3/3p4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Steiner Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. b3","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 b2b3","epd":"rnbqkb1r/pppppppp/1n6/4P3/2P5/1P6/P2P1PPP/RNBQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Sämisch Attack","pgn":"1. e4 Nf6 2. e5 Nd5 3. Nc3","uci":"e2e4 g8f6 e4e5 f6d5 b1c3","epd":"rnbqkb1r/pppppppp/8/3nP3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: The Squirrel","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nf4","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5f4","epd":"rnbqkb1r/pppppppp/8/4P3/2P2n2/8/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Two Pawns Attack","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4","uci":"e2e4 g8f6 e4e5 f6d5 c2c4","epd":"rnbqkb1r/pppppppp/8/3nP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Two Pawns Attack, Lasker Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5","epd":"rnbqkb1r/pppppppp/1n6/2P1P3/8/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Two Pawns Attack, Mikenas Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Bc4 e6 6. Nc3 d6","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 c4c5 b6d5 f1c4 e7e6 b1c3 d7d6","epd":"rnbqkb1r/ppp2ppp/3pp3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR w KQkq -"},{"eco":"B02","name":"Alekhine Defense: Two Pawns Attack, Tate Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. a4","uci":"e2e4 g8f6 e4e5 f6d5 c2c4 d5b6 a2a4","epd":"rnbqkb1r/pppppppp/1n6/4P3/P1P5/8/1P1P1PPP/RNBQKBNR b KQkq -"},{"eco":"B02","name":"Alekhine Defense: Welling Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. b3","uci":"e2e4 g8f6 e4e5 f6d5 b2b3","epd":"rnbqkb1r/pppppppp/8/3nP3/8/1P6/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4","uci":"e2e4 g8f6 e4e5 f6d5 d2d4","epd":"rnbqkb1r/pppppppp/8/3nP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6","epd":"rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B03","name":"Alekhine Defense","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4","epd":"rnbqkb1r/ppp1pppp/3p4/3nP3/2PP4/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense: Balogh Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. 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Rc1 O-O 9. b3","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 e5d6 c7d6 b1c3 g7g6 c1e3 f8g7 a1c1 e8g8 b2b3","epd":"rnbq1rk1/pp2ppbp/1n1p2p1/8/2PP4/1PN1B3/P4PPP/2RQKBNR b K -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4","epd":"rnbqkb1r/ppp1pppp/1n1p4/4P3/2PP1P2/8/PP4PP/RNBQKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Cambridge Gambit","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g5","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g5","epd":"rnbqkb1r/ppp1pp1p/1n1p4/4P1p1/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Fianchetto Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 g6","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 g7g6","epd":"rnbqkb1r/ppp1pp1p/1n1p2p1/4P3/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Nf3 Bg4 8. e6 fxe6 9. c5","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 g1f3 c8g4 e5e6 f7e6 c4c5","epd":"r2qkb1r/ppp1p1pp/1nn1p3/2P5/3P2b1/5N2/PP4PP/RNBQKB1R b KQkq -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Korchnoi Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 c8f5 b1c3 e7e6 g1f3 f8e7 f1e2 e8g8 e1g1 f7f6","epd":"rn1q1rk1/ppp1b1pp/1n2pp2/4Pb2/2PP4/2N2N2/PP2B1PP/R1BQ1RK1 w - -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Main Line","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3","epd":"r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/4B3/PP4PP/RN1QKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Tartakower Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Qd7 10. Be2 O-O-O 11. O-O Be7","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 d6e5 f4e5 b8c6 c1e3 c8f5 b1c3 e7e6 g1f3 d8d7 f1e2 e8c8 e1g1 f8e7","epd":"2kr3r/pppqbppp/1nn1p3/4Pb2/2PP4/2N1BN2/PP2B1PP/R2Q1RK1 w - -"},{"eco":"B03","name":"Alekhine Defense: Four Pawns Attack, Trifunovic Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 f2f4 c8f5","epd":"rn1qkb1r/ppp1pppp/1n1p4/4Pb2/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -"},{"eco":"B03","name":"Alekhine Defense: Hunt Variation","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. c5","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 c2c4 d5b6 c4c5","epd":"rnbqkb1r/ppp1pppp/1n1p4/2P1P3/3P4/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"B03","name":"Alekhine Defense: Modern Variation, Alekhine Gambit","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. Nf3 Bg4 6. 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Nf3 Bg4 5. h3","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 h2h3","epd":"rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N1P/PPP2PP1/RNBQKB1R b KQkq -"},{"eco":"B05","name":"Alekhine Defense: Modern Variation, Vitolins Attack","pgn":"1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. c4 Nb6 6. d5","uci":"e2e4 g8f6 e4e5 f6d5 d2d4 d7d6 g1f3 c8g4 c2c4 d5b6 d4d5","epd":"rn1qkb1r/ppp1pppp/1n1p4/3PP3/2P3b1/5N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"B06","name":"Modern Defense","pgn":"1. e4 g6","uci":"e2e4 g7g6","epd":"rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B06","name":"Modern Defense","pgn":"1. e4 g6 2. d4 Bg7","uci":"e2e4 g7g6 d2d4 f8g7","epd":"rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B06","name":"Modern Defense: Anti-Modern","pgn":"1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. Bc4 d6 5. 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Qf3 e6 4. d4 Bxd4","uci":"e2e4 g7g6 f1c4 f8g7 d1f3 e7e6 d2d4 g7d4","epd":"rnbqk1nr/pppp1p1p/4p1p1/8/2BbP3/5Q2/PPP2PPP/RNB1K1NR w KQkq -"},{"eco":"B06","name":"Modern Defense: Dunworthy Variation","pgn":"1. e4 g6 2. d4 Bg7 3. c4 d5 4. exd5 c6 5. dxc6 Bxd4","uci":"e2e4 g7g6 d2d4 f8g7 c2c4 d7d5 e4d5 c7c6 d5c6 g7d4","epd":"rnbqk1nr/pp2pp1p/2P3p1/8/2Pb4/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B06","name":"Modern Defense: Fianchetto Gambit","pgn":"1. e4 g6 2. d4 f5","uci":"e2e4 g7g6 d2d4 f7f5","epd":"rnbqkbnr/ppppp2p/6p1/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"B06","name":"Modern Defense: Gurgenidze Defense","pgn":"1. e4 g6 2. d4 Bg7 3. Nc3 c6 4. f4 d5 5. e5 h5","uci":"e2e4 g7g6 d2d4 f8g7 b1c3 c7c6 f2f4 d7d5 e4e5 h7h5","epd":"rnbqk1nr/pp2ppb1/2p3p1/3pP2p/3P1P2/2N5/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"B06","name":"Modern Defense: Lizard Defense, Mittenberger Gambit","pgn":"1. e4 g6 2. d4 Bg7 3. 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Ne4 Nxe4 10. Qxe4","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 g8f6 f1d3 e7e6 g1f3 f8d6 d1e2 h7h6 g5e4 f6e4 e2e4","epd":"r1bqk2r/pp1n1pp1/2pbp2p/8/3PQ3/3B1N2/PPP2PPP/R1B1K2R b KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Modern Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5","epd":"r1bqkbnr/pp1npppp/2p5/6N1/3P4/8/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ndf6","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 e4g5 d7f6","epd":"r1bqkbnr/pp2pppp/2p2n2/6N1/3P4/8/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack","pgn":"1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3","uci":"e2e4 c7c6 d2d4 d7d5 b1c3 d5e4 c3e4 b8d7 g1f3 g8f6 e4g3","epd":"r1bqkb1r/pp1npppp/2p2n2/8/3P4/5NN1/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Smyslov Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6","epd":"r1bqkb1r/pp3ppp/1np1pn2/6N1/2BP4/8/PPP1QPPP/R1B1K1NR w KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6 8. Bb3","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4g5 e7e6 d1e2 d7b6 c4b3","epd":"r1bqkb1r/pp3ppp/1np1pn2/6N1/3P4/1B6/PPP1QPPP/R1B1K1NR b KQkq -"},{"eco":"B17","name":"Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Nxf6+ Nxf6","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 b8d7 f1c4 g8f6 e4f6 d7f6","epd":"r1bqkb1r/pp2pppp/2p2n2/8/2BP4/8/PPP2PPP/R1BQK1NR w KQkq -"},{"eco":"B18","name":"Caro-Kann Defense: Classical Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5","epd":"rn1qkbnr/pp2pppp/2p5/5b2/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"B18","name":"Caro-Kann Defense: Classical Variation, Flohr Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nh3","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 g1h3","epd":"rn1qkbnr/pp2pppp/2p3b1/8/3P4/6NN/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B18","name":"Caro-Kann Defense: Classical Variation, Main Line","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4","epd":"rn1qkbnr/pp2pppp/2p3b1/8/3P3P/6N1/PPP2PP1/R1BQKBNR b KQkq -"},{"eco":"B18","name":"Caro-Kann Defense: Classical Variation, Maróczy Attack","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 f2f4","epd":"rn1qkbnr/pp2pppp/2p3b1/8/3P1P2/6N1/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"B18","name":"Caro-Kann Defense: Martian Gambit","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng5 Bg6 6. N1f3 h6 7. Ne6","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g5 f5g6 g1f3 h7h6 g5e6","epd":"rn1qkbnr/pp2ppp1/2p1N1bp/8/3P4/5N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B19","name":"Caro-Kann Defense: Classical Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7","epd":"r2qkbnr/pp1nppp1/2p3bp/8/3P3P/5NN1/PPP2PP1/R1BQKB1R w KQkq -"},{"eco":"B19","name":"Caro-Kann Defense: Classical Variation, Lobron System","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Be7","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 e7e6 c1d2 g8f6 e1c1 f8e7","epd":"r2qk2r/pp1nbpp1/2p1pn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq -"},{"eco":"B19","name":"Caro-Kann Defense: Classical Variation, Seirawan Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Ngf6 11. Bd2 e6 12. O-O-O Bd6","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5 g6h7 f1d3 h7d3 d1d3 g8f6 c1d2 e7e6 e1c1 f8d6","epd":"r2qk2r/pp1n1pp1/2pbpn1p/7P/3P4/3Q1NN1/PPPB1PP1/2KR3R w kq -"},{"eco":"B19","name":"Caro-Kann Defense: Classical Variation, Spassky Variation","pgn":"1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5","uci":"e2e4 c7c6 d2d4 d7d5 b1d2 d5e4 d2e4 c8f5 e4g3 f5g6 h2h4 h7h6 g1f3 b8d7 h4h5","epd":"r2qkbnr/pp1nppp1/2p3bp/7P/3P4/5NN1/PPP2PP1/R1BQKB1R b KQkq -"},{"eco":"B20","name":"Sicilian Defense","pgn":"1. e4 c5","uci":"e2e4 c7c5","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"B20","name":"Sicilian Defense: Amazon Attack","pgn":"1. e4 c5 2. Qg4","uci":"e2e4 c7c5 d1g4","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P1Q1/8/PPPP1PPP/RNB1KBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Big Clamp Formation","pgn":"1. e4 c5 2. d3 Nc6 3. c3 d6 4. f4","uci":"e2e4 c7c5 d2d3 b8c6 c2c3 d7d6 f2f4","epd":"r1bqkbnr/pp2pppp/2np4/2p5/4PP2/2PP4/PP4PP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Bowdler Attack","pgn":"1. e4 c5 2. Bc4","uci":"e2e4 c7c5 f1c4","epd":"rnbqkbnr/pp1ppppp/8/2p5/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Brick Variation","pgn":"1. e4 c5 2. Nh3","uci":"e2e4 c7c5 g1h3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/7N/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Czerniak Attack","pgn":"1. e4 c5 2. b3","uci":"e2e4 c7c5 b2b3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Czerniak Attack, Queen Fianchetto Variation","pgn":"1. e4 c5 2. b3 b6","uci":"e2e4 c7c5 b2b3 b7b6","epd":"rnbqkbnr/p2ppppp/1p6/2p5/4P3/1P6/P1PP1PPP/RNBQKBNR w KQkq -"},{"eco":"B20","name":"Sicilian Defense: Euwe Attack, Prins Gambit","pgn":"1. e4 c5 2. b3 d5 3. Bb2","uci":"e2e4 c7c5 b2b3 d7d5 c1b2","epd":"rnbqkbnr/pp2pppp/8/2pp4/4P3/1P6/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Gloria Variation","pgn":"1. e4 c5 2. c4 d6 3. Nc3 Nc6 4. g3 h5","uci":"e2e4 c7c5 c2c4 d7d6 b1c3 b8c6 g2g3 h7h5","epd":"r1bqkbnr/pp2ppp1/2np4/2p4p/2P1P3/2N3P1/PP1P1P1P/R1BQKBNR w KQkq -"},{"eco":"B20","name":"Sicilian Defense: Grob Variation","pgn":"1. e4 c5 2. g4","uci":"e2e4 c7c5 g2g4","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P1P1/8/PPPP1P1P/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Keres Variation","pgn":"1. e4 c5 2. Ne2","uci":"e2e4 c7c5 g1e2","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -"},{"eco":"B20","name":"Sicilian Defense: King David's Opening","pgn":"1. e4 c5 2. Ke2","uci":"e2e4 c7c5 e1e2","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPKPPP/RNBQ1BNR b kq -"},{"eco":"B20","name":"Sicilian Defense: Kronberger Variation","pgn":"1. e4 c5 2. Na3","uci":"e2e4 c7c5 b1a3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/N7/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Kronberger Variation, Nemeth Gambit","pgn":"1. e4 c5 2. Na3 Nc6 3. d4 cxd4 4. Bc4","uci":"e2e4 c7c5 b1a3 b8c6 d2d4 c5d4 f1c4","epd":"r1bqkbnr/pp1ppppp/2n5/8/2BpP3/N7/PPP2PPP/R1BQK1NR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Lasker-Dunne Attack","pgn":"1. e4 c5 2. g3","uci":"e2e4 c7c5 g2g3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Mengarini Variation","pgn":"1. e4 c5 2. a3","uci":"e2e4 c7c5 a2a3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Myers Attack, with a4","pgn":"1. e4 c5 2. a4","uci":"e2e4 c7c5 a2a4","epd":"rnbqkbnr/pp1ppppp/8/2p5/P3P3/8/1PPP1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Myers Attack, with h4","pgn":"1. e4 c5 2. h4","uci":"e2e4 c7c5 h2h4","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P2P/8/PPPP1PP1/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Staunton-Cochrane Variation","pgn":"1. e4 c5 2. c4","uci":"e2e4 c7c5 c2c4","epd":"rnbqkbnr/pp1ppppp/8/2p5/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit","pgn":"1. e4 c5 2. b4","uci":"e2e4 c7c5 b2b4","epd":"rnbqkbnr/pp1ppppp/8/2p5/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit, Abrahams Variation","pgn":"1. e4 c5 2. b4 cxb4 3. Bb2","uci":"e2e4 c7c5 b2b4 c5b4 c1b2","epd":"rnbqkbnr/pp1ppppp/8/8/1p2P3/8/PBPP1PPP/RN1QKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit, Carlsbad Variation","pgn":"1. e4 c5 2. b4 cxb4 3. a3 bxa3","uci":"e2e4 c7c5 b2b4 c5b4 a2a3 b4a3","epd":"rnbqkbnr/pp1ppppp/8/8/4P3/p7/2PP1PPP/RNBQKBNR w KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit, Marienbad Variation","pgn":"1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Bb2","uci":"e2e4 c7c5 b2b4 c5b4 a2a3 d7d5 e4d5 d8d5 c1b2","epd":"rnb1kbnr/pp2pppp/8/3q4/1p6/P7/1BPP1PPP/RN1QKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit, Marshall Variation","pgn":"1. e4 c5 2. b4 cxb4 3. a3","uci":"e2e4 c7c5 b2b4 c5b4 a2a3","epd":"rnbqkbnr/pp1ppppp/8/8/1p2P3/P7/2PP1PPP/RNBQKBNR b KQkq -"},{"eco":"B20","name":"Sicilian Defense: Wing Gambit, Nanu Gambit","pgn":"1. e4 c5 2. b4 cxb4 3. a3 d5 4. exd5 Qxd5 5. Nf3 e5 6. c4 Qe6 7. 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Nf3 a6","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 g1f3 a7a6","epd":"rnbqkbnr/1p1p1ppp/p3p3/8/4P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 a6 8. O-O Bd6","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 a7a6 e1g1 f8d6","epd":"r1b1k1nr/1pqp1ppp/p1nbp3/8/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bc5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8c5","epd":"r1bqk1nr/pp1p1ppp/2n1p3/2b5/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6 7. O-O b5 8. Bb3 Bc5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6 e1g1 b7b5 c4b3 f8c5","epd":"r1bqk1nr/3p1ppp/p1n1p3/1pb5/4P3/1BN2N2/PP3PPP/R1BQ1RK1 w kq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 a7a6","epd":"r1bqkbnr/1p1p1ppp/p1n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Bb4","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 f8b4","epd":"r1bqk1nr/pp1p1ppp/2n1p3/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 d7d6 f1c4 e7e6","epd":"r1bqkbnr/pp3ppp/2npp3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7","epd":"r1b1kbnr/ppqp1ppp/2n1p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. O-O Ng4","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 g1f3 e7e6 f1c4 d8c7 d1e2 g8f6 e1g1 f6g4","epd":"r1b1kb1r/ppqp1ppp/2n1p3/8/2B1P1n1/2N2N2/PP2QPPP/R1B2RK1 w kq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Bc4 e6 6. Nf3 d6 7. O-O a6 8. Qe2 b5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 b8c6 f1c4 e7e6 g1f3 d7d6 e1g1 a7a6 d1e2 b7b5","epd":"r1bqkbnr/5ppp/p1npp3/1p6/2B1P3/2N2N2/PP2QPPP/R1B2RK1 w kq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Bc4 a6 6. Nf3 Ne7","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4c3 b1c3 e7e6 f1c4 a7a6 g1f3 g8e7","epd":"rnbqkb1r/1p1pnppp/p3p3/8/2B1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 Nf6","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 g8f6","epd":"rnbqkb1r/pp1ppppp/5n2/8/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Center Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 e5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 e7e5","epd":"rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 d3 4. c4","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4d3 c3c4","epd":"rnbqkbnr/pp1ppppp/8/8/2P1P3/3p4/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Push Variation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 d3","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d4d3","epd":"rnbqkbnr/pp1ppppp/8/8/4P3/2Pp4/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 d5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d7d5","epd":"rnbqkbnr/pp2pppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B21","name":"Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation","pgn":"1. e4 c5 2. d4 cxd4 3. c3 Qa5","uci":"e2e4 c7c5 d2d4 c5d4 c2c3 d8a5","epd":"rnb1kbnr/pp1ppppp/8/q7/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation","pgn":"1. e4 c5 2. c3","uci":"e2e4 c7c5 c2c3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Anti-Alapin Gambit","pgn":"1. e4 c5 2. c3 d5 3. exd5 Nf6","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 g8f6","epd":"rnbqkb1r/pp2pppp/5n2/2pP4/8/2P5/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5","epd":"rnb1kbnr/pp2pppp/8/2pq4/8/2P5/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 g6 5. Nf3","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 g7g6 g1f3","epd":"rnb1kbnr/pp2pp1p/6p1/2pq4/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 b8c6 g1f3","epd":"r1b1kbnr/pp2pppp/2n5/2pq4/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4","epd":"r3kbnr/pp2pppp/2n5/3q4/3P2b1/5N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Bg4 7. Nc3 Bxf3 8. gxf3 Qxd4 9. Qxd4 Nxd4","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 c5d4 c3d4 b8c6 g1f3 c8g4 b1c3 g4f3 g2f3 d5d4 d1d4 c6d4","epd":"r3kbnr/pp2pppp/8/8/3n4/2N2P2/PP3P1P/R1B1KB1R w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 cxd4 6. cxd4 e5 7. Nc3 Bb4 8. Be2","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 b8c6 g1f3 c5d4 c3d4 e7e5 b1c3 f8b4 f1e2","epd":"r1b1k1nr/pp3ppp/2n5/3qp3/1b1P4/2N2N2/PP2BPPP/R1BQK2R b KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line","pgn":"1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4","uci":"e2e4 c7c5 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6 g1f3 c8g4","epd":"rn2kb1r/pp2pppp/5n2/2pq4/3P2b1/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Smith-Morra Declined","pgn":"1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4","uci":"e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 d2d4 c5d4","epd":"rnbqkb1r/pp1ppppp/8/3nP3/3p4/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Stoltz Attack","pgn":"1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3","uci":"e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3","epd":"r1bqkb1r/pp1ppppp/1nn5/2p1P3/8/1BP2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"B22","name":"Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line","pgn":"1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 c4 7. Bc2 Qc7 8. Qe2 g5","uci":"e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 f1c4 d5b6 c4b3 c5c4 b3c2 d8c7 d1e2 g7g5","epd":"r1b1kb1r/ppqppp1p/1nn5/4P1p1/2p5/2P2N2/PPBPQPPP/RNB1K2R w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Delayed Alapin Variation","pgn":"1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6","uci":"e2e4 c7c5 g1f3 e7e6 c2c3 d7d5 e4d5 d8d5 d2d4 g8f6","epd":"rnb1kb1r/pp3ppp/4pn2/2pq4/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B22","name":"Sicilian Defense: Delayed Alapin Variation","pgn":"1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 exd5 5. Bb5+ Nc6 6. O-O Bd6 7. d4","uci":"e2e4 c7c5 g1f3 e7e6 c2c3 d7d5 e4d5 e6d5 f1b5 b8c6 e1g1 f8d6 d2d4","epd":"r1bqk1nr/pp3ppp/2nb4/1Bpp4/3P4/2P2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"B22","name":"Sicilian Defense: Heidenfeld Variation","pgn":"1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Na3","uci":"e2e4 c7c5 c2c3 g8f6 e4e5 f6d5 g1f3 b8c6 b1a3","epd":"r1bqkb1r/pp1ppppp/2n5/2pnP3/8/N1P2N2/PP1P1PPP/R1BQKB1R b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3","uci":"e2e4 c7c5 b1c3","epd":"rnbqkbnr/pp1ppppp/8/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 e6","uci":"e2e4 c7c5 b1c3 e7e6","epd":"rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 e6 3. g3","uci":"e2e4 c7c5 b1c3 e7e6 g2g3","epd":"rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 d5","uci":"e2e4 c7c5 b1c3 e7e6 f2f4 b8c6 g1f3 d7d5","epd":"r1bqkbnr/pp3ppp/2n1p3/2pp4/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 d5 5. Bb5","uci":"e2e4 c7c5 b1c3 e7e6 f2f4 b8c6 g1f3 d7d5 f1b5","epd":"r1bqkbnr/pp3ppp/2n1p3/1Bpp4/4PP2/2N2N2/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 e6 3. Nge2 a6 4. g3","uci":"e2e4 c7c5 b1c3 e7e6 g1e2 a7a6 g2g3","epd":"rnbqkbnr/1p1p1ppp/p3p3/2p5/4P3/2N3P1/PPPPNP1P/R1BQKB1R b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Carlsen Variation","pgn":"1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2","uci":"e2e4 c7c5 b1c3 d7d6 d2d4 c5d4 d1d4 b8c6 d4d2","epd":"r1bqkbnr/pp2pppp/2np4/8/4P3/2N5/PPPQ1PPP/R1B1KBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Chameleon Variation","pgn":"1. e4 c5 2. Nc3 Nc6 3. Nge2","uci":"e2e4 c7c5 b1c3 b8c6 g1e2","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Grob Attack","pgn":"1. e4 c5 2. Nc3 Nc6 3. g4","uci":"e2e4 c7c5 b1c3 b8c6 g2g4","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4P1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Korchnoi Defense","pgn":"1. e4 c5 2. Nc3 e6 3. g3 d5","uci":"e2e4 c7c5 b1c3 e7e6 g2g3 d7d5","epd":"rnbqkbnr/pp3ppp/4p3/2pp4/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Portland Attack","pgn":"1. e4 c5 2. Nc3 Nc6 3. d3 g6 4. g4","uci":"e2e4 c7c5 b1c3 b8c6 d2d3 g7g6 g2g4","epd":"r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P1P1/2NP4/PPP2P1P/R1BQKBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Closed, Traditional","pgn":"1. e4 c5 2. Nc3 Nc6","uci":"e2e4 c7c5 b1c3 b8c6","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"B23","name":"Sicilian Defense: Grand Prix Attack","pgn":"1. e4 c5 2. Nc3 Nc6 3. f4","uci":"e2e4 c7c5 b1c3 b8c6 f2f4","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"B23","name":"Sicilian Defense: Grand Prix Attack, Schofman Variation","pgn":"1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5","uci":"e2e4 c7c5 b1c3 b8c6 f2f4 g7g6 g1f3 f8g7 f1c4 e7e6 f4f5","epd":"r1bqk1nr/pp1p1pbp/2n1p1p1/2p2P2/2B1P3/2N2N2/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"B24","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6","epd":"r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -"},{"eco":"B24","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7","epd":"r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQkq -"},{"eco":"B24","name":"Sicilian Defense: Closed, Fianchetto Variation","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3","uci":"e2e4 c7c5 b1c3 b8c6 g2g3","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"B24","name":"Sicilian Defense: Closed, Smyslov Variation","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. Be3 Nd4 7. Nce2","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 e7e6 c1e3 c6d4 c3e2","epd":"r1bqk1nr/pp1p1pbp/4p1p1/2p5/3nP3/3PB1P1/PPP1NPBP/R2QK1NR b KQkq -"},{"eco":"B25","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6","epd":"r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -"},{"eco":"B25","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4","epd":"r1bqk1nr/pp2ppbp/2np2p1/2p5/4PP2/2NP2P1/PPP3BP/R1BQK1NR b KQkq -"},{"eco":"B25","name":"Sicilian Defense: Closed, Botvinnik Defense, Edge Variation","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5 7. Nh3 Nge7","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5 g1h3 g8e7","epd":"r1bqk2r/pp2npbp/2np2p1/2p1p3/4PP2/2NP2PN/PPP3BP/R1BQK2R w KQkq -"},{"eco":"B25","name":"Sicilian Defense: Closed, Botvinnik Defense, with Nge2","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e5","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 g1e2 e7e5","epd":"r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP1NPBP/R1BQK2R w KQkq -"},{"eco":"B25","name":"Sicilian Defense: Closed, Botvinnik Defense, with f4","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e5","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 f2f4 e7e5","epd":"r1bqk1nr/pp3pbp/2np2p1/2p1p3/4PP2/2NP2P1/PPP3BP/R1BQK1NR w KQkq -"},{"eco":"B26","name":"Sicilian Defense: Closed","pgn":"1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3","uci":"e2e4 c7c5 b1c3 b8c6 g2g3 g7g6 f1g2 f8g7 d2d3 d7d6 c1e3","epd":"r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -"},{"eco":"B27","name":"Modern Defense: Pterodactyl Variation","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Sicilian, Anhanguera","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Be3","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1e3","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N1BN2/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Sicilian, Benoni Gambit","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. d5","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 d4d5","epd":"rnb1k1nr/pp1pppbp/6p1/q1pP4/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Sicilian, Pteranodon","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3 Bxc3+ 6. bxc3","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3 g7c3 b2c3","epd":"rnb1k1nr/pp1ppp1p/6p1/q1P5/4P3/2P2N2/P1P2PPP/R1BQKB1R b KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Sicilian, Rhamphorhynchus","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. Nc3","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 d4c5 d8a5 b1c3","epd":"rnb1k1nr/pp1pppbp/6p1/q1P5/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Sicilian, Unpin","pgn":"1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. Nc3 Qa5 5. Bd2","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 f8g7 b1c3 d8a5 c1d2","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2N2N2/PPPB1PPP/R2QKB1R b KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Western, Pterodactyl","pgn":"1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 Qa5","uci":"e2e4 c7c5 g1f3 g7g6 c2c3 f8g7 d2d4 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q1p5/3PP3/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B27","name":"Pterodactyl Defense: Western, Rhamphorhynchus","pgn":"1. e4 c5 2. 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Nc3 e5 4. Bc4 Be7 5. d3 d6 6. Nd2 Bg5","uci":"e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6 f3d2 e7g5","epd":"r1bqk1nr/pp3ppp/2np4/2p1p1b1/2B1P3/2NP4/PPPN1PPP/R1BQK2R w KQkq -"},{"eco":"B30","name":"Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6","pgn":"1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 Nf6","uci":"e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 g8f6","epd":"r1bqk2r/pp1pbppp/2n2n2/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq -"},{"eco":"B30","name":"Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6","pgn":"1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6","uci":"e2e4 c7c5 g1f3 b8c6 b1c3 e7e5 f1c4 f8e7 d2d3 d7d6","epd":"r1bqk1nr/pp2bppp/2np4/2p1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R w KQkq -"},{"eco":"B30","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5","uci":"e2e4 c7c5 g1f3 b8c6 f1b5","epd":"r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"B30","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Brooklyn Retreat Defense","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 Nb8","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 c6b8","epd":"rnbqkbnr/pp1ppppp/8/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"B30","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 Na5 4. b4","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 c6a5 b2b4","epd":"r1bqkbnr/pp1ppppp/8/nBp5/1P2P3/5N2/P1PP1PPP/RNBQK2R b KQkq -"},{"eco":"B30","name":"Sicilian Defense: Old Sicilian","pgn":"1. e4 c5 2. Nf3 Nc6","uci":"e2e4 c7c5 g1f3 b8c6","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"B30","name":"Sicilian Defense: Portsmouth Gambit","pgn":"1. e4 c5 2. Nf3 Nc6 3. b4","uci":"e2e4 c7c5 g1f3 b8c6 b2b4","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"B31","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 g6","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 g7g6","epd":"r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"B31","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 e5 6. d4","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 e7e5 d2d4","epd":"r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"B31","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. d4","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d2d4","epd":"r1bqk2r/pp1pppbp/2n2np1/1Bp5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"B31","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. Qa4","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 c2c3 g8f6 d1a4","epd":"r1bqk2r/pp1pppbp/2n2np1/1Bp5/Q3P3/2P2N2/PP1P1PPP/RNB2RK1 b kq -"},{"eco":"B31","name":"Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 e5 6. b4","uci":"e2e4 c7c5 g1f3 b8c6 f1b5 g7g6 e1g1 f8g7 f1e1 e7e5 b2b4","epd":"r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/1P2P3/5N2/P1PP1PPP/RNBQR1K1 b kq -"},{"eco":"B32","name":"Sicilian Defense: Accelerated Dragon","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6","epd":"r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Flohr Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qc7","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8c7","epd":"r1b1kbnr/ppqppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Franco-Sicilian Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 e6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 e7e6","epd":"r1bqkbnr/pp1p1ppp/2n1p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Godiva Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Qb6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d8b6","epd":"r1b1kbnr/pp1ppppp/1qn5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Kalashnikov Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5 d4b5 d7d6","epd":"r1bqkbnr/pp3ppp/2np4/1N2p3/4P3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Löwenthal Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 e7e5","epd":"r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Nimzo-American Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 d7d5","epd":"r1bqkbnr/pp2pppp/2n5/3p4/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 a6 5. c4 e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 a7a6 c2c4 e7e5","epd":"r1bqkbnr/1p1p1ppp/p1n5/4p3/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Open","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4","epd":"r1bqkbnr/pp1ppppp/2n5/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B32","name":"Sicilian Defense: Open","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4","epd":"r1bqkbnr/pp1ppppp/2n5/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B32","name":"Sicilian Defense: Open","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4","epd":"r1bqkbnr/pp1ppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5","epd":"r1bqkb1r/pp1p1ppp/2n2n2/4p3/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Bird Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 Be6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 c8e6","epd":"r2qkb1r/1p3ppp/p1npbn2/4p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nxc6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4c6","epd":"r1bqkb1r/pp1p1ppp/2N2n2/4p3/4P3/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4f3","epd":"r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b3","epd":"r1bqkb1r/pp1p1ppp/2n2n2/4p3/4P3/1NN5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5","epd":"r1bqkb1r/5ppp/p1np1n2/1p2p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5","epd":"r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 c3d5","epd":"r1bqkb1r/5ppp/p1np1n2/1p1Np1B1/4P3/N7/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 Bg7","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f8g7","epd":"r1bqk2r/5pbp/p1np1p2/1p1Np3/4P3/N7/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B33","name":"Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's Sacrifice","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. Bxb5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 d4b5 d7d6 c1g5 a7a6 b5a3 b7b5 g5f6 g7f6 c3d5 f6f5 f1b5","epd":"r1bqkb1r/5p1p/p1np4/1B1Npp2/4P3/N7/PPP2PPP/R2QK2R b KQkq -"},{"eco":"B33","name":"Sicilian Defense: Open","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6","epd":"r1bqkb1r/pp1ppppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B34","name":"Sicilian Defense: Accelerated Dragon, Exchange Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nxc6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 d4c6","epd":"r1bqkbnr/pp1ppp1p/2N3p1/8/4P3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B34","name":"Sicilian Defense: Accelerated Dragon, Modern Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3","epd":"r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B35","name":"Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4","epd":"r1bqk2r/pp1pppbp/2n2np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -"},{"eco":"B35","name":"Sicilian Defense: Dragon Variation, Modern Bc4 Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 d6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1c4 d7d6","epd":"r1bqk2r/pp2ppbp/2np1np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R w KQkq -"},{"eco":"B36","name":"Sicilian Defense: Accelerated Dragon, Maróczy Bind","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4","epd":"r1bqkbnr/pp1ppp1p/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"B36","name":"Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 g8f6 b1c3 c6d4 d1d4 d7d6","epd":"r1bqkb1r/pp2pp1p/3p1np1/8/2PQP3/2N5/PP3PPP/R1B1KB1R w KQkq -"},{"eco":"B37","name":"Sicilian Defense: Accelerated Dragon, Maróczy Bind","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7","epd":"r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B37","name":"Sicilian Defense: Accelerated Dragon, Simagin Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Nc2 d6 7. Be2 Nh6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 d4c2 d7d6 f1e2 g8h6","epd":"r1bqk2r/pp2ppbp/2np2pn/8/2P1P3/8/PPN1BPPP/RNBQK2R w KQkq -"},{"eco":"B38","name":"Sicilian Defense: Accelerated Dragon, Maróczy Bind","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3","epd":"r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/4B3/PP3PPP/RN1QKB1R b KQkq -"},{"eco":"B39","name":"Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c2c4 f8g7 c1e3 g8f6 b1c3 f6g4","epd":"r1bqk2r/pp1pppbp/2n3p1/8/2PNP1n1/2N1B3/PP3PPP/R2QKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: Alapin Variation, Sherzer Variation","pgn":"1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 Nc6","uci":"e2e4 c7c5 g1f3 e7e6 c2c3 g8f6 e4e5 f6d5 d2d4 b8c6","epd":"r1bqkb1r/pp1p1ppp/2n1p3/2pnP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: Delayed Alapin Variation, with e6","pgn":"1. e4 c5 2. Nf3 e6 3. c3","uci":"e2e4 c7c5 g1f3 e7e6 c2c3","epd":"rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"B40","name":"Sicilian Defense: Drazic Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 a6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 a7a6","epd":"rnbqkbnr/1p1p1ppp/p3p3/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: French Variation","pgn":"1. e4 c5 2. Nf3 e6","uci":"e2e4 c7c5 g1f3 e7e6","epd":"rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: French Variation, Normal","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6","epd":"rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: French Variation, Open","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4","epd":"rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: French Variation, Westerinen Attack","pgn":"1. e4 c5 2. Nf3 e6 3. b3","uci":"e2e4 c7c5 g1f3 e7e6 b2b3","epd":"rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/1P3N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"B40","name":"Sicilian Defense: Gaw-Paw Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Qb6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d8b6","epd":"rnb1kb1r/pp1p1ppp/1q2pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B40","name":"Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation","pgn":"1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 b5 5. d4 cxd4 6. 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Bg2","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 g2g3 c8b7 f1g2","epd":"rn1qkbnr/1b1p1ppp/p3p3/1p6/3NP3/2N3P1/PPP2PBP/R1BQK2R b KQkq -"},{"eco":"B43","name":"Sicilian Defense: Kan Variation, Wing Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5","epd":"rnbqkbnr/3p1ppp/p3p3/1p6/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B43","name":"Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. Be3 Bc5 8. Qg4","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 a7a6 b1c3 b7b5 f1d3 d8b6 c1e3 f8c5 d1g4","epd":"rnb1k1nr/3p1ppp/pq2p3/1pb5/3NP1Q1/2NBB3/PPP2PPP/R3K2R b KQkq -"},{"eco":"B43","name":"Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Qb6 7. 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O-O b6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5 d7d6 c2c4 g8f6 b1c3 a7a6 b5a3 f8e7 f1e2 e8g8 e1g1 b7b6","epd":"r1bq1rk1/4bppp/ppnppn2/8/2P1P3/N1N5/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"B44","name":"Sicilian Defense: Taimanov Variation, Szén Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 d4b5","epd":"r1bqkbnr/pp1p1ppp/2n1p3/1N6/4P3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B45","name":"Sicilian Defense: Four Knights Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 g8f6","epd":"r1bqkb1r/pp1p1ppp/2n1pn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B45","name":"Sicilian Defense: Four Knights Variation, American Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 Bb4 7. 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Ndb5 d6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 g8f6 d4b5 d7d6","epd":"r1bqkb1r/pp3ppp/2nppn2/1N6/4P3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B45","name":"Sicilian Defense: Taimanov Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3","epd":"r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"B46","name":"Sicilian Defense: Taimanov Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 a7a6","epd":"r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B47","name":"Sicilian Defense: Taimanov Variation, Bastrikov Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7","epd":"r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B47","name":"Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ndb5 Qb8 7. Be3 a6 8. Bb6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 d4b5 c7b8 c1e3 a7a6 e3b6","epd":"rqb1kbnr/1p1p1ppp/pBn1p3/1N6/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B48","name":"Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3","epd":"r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B49","name":"Sicilian Defense: Taimanov Variation, Bastrikov Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 b8c6 b1c3 d8c7 c1e3 a7a6 f1e2","epd":"r1b1kbnr/1pqp1ppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -"},{"eco":"B50","name":"Sicilian Defense","pgn":"1. e4 c5 2. Nf3 d6 3. d4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4","epd":"rnbqkbnr/pp2pppp/3p4/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"B50","name":"Sicilian Defense","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4","epd":"rnbqkbnr/pp2pppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4 7. d5 Qa5+ 8. Nc3 Nxc3 9. bxc3","uci":"e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4 d4d5 d8a5 b1c3 e4c3 b2c3","epd":"r1b1kb1r/pp2pppp/2np4/q2P4/8/2P2N2/P3BPPP/R1BQK2R b KQkq -"},{"eco":"B50","name":"Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 cxd4 6. cxd4 Nxe4","uci":"e2e4 c7c5 g1f3 d7d6 c2c3 g8f6 f1e2 b8c6 d2d4 c5d4 c3d4 f6e4","epd":"r1bqkb1r/pp2pppp/2np4/8/3Pn3/5N2/PP2BPPP/RNBQK2R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Delayed Alapin Variation, with d6","pgn":"1. e4 c5 2. Nf3 d6 3. c3","uci":"e2e4 c7c5 g1f3 d7d6 c2c3","epd":"rnbqkbnr/pp2pppp/3p4/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"B50","name":"Sicilian Defense: Kopec System","pgn":"1. e4 c5 2. Nf3 d6 3. Bd3","uci":"e2e4 c7c5 g1f3 d7d6 f1d3","epd":"rnbqkbnr/pp2pppp/3p4/2p5/4P3/3B1N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"B50","name":"Sicilian Defense: Kotov Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. g3 b5","uci":"e2e4 c7c5 g1f3 d7d6 g2g3 b7b5","epd":"rnbqkbnr/p3pppp/3p4/1pp5/4P3/5NP1/PPPP1P1P/RNBQKB1R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Modern Variations","pgn":"1. e4 c5 2. Nf3 d6","uci":"e2e4 c7c5 g1f3 d7d6","epd":"rnbqkbnr/pp2pppp/3p4/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order","pgn":"1. e4 c5 2. Nf3 d6 3. d4 Nf6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 g8f6","epd":"rnbqkb1r/pp2pppp/3p1n2/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted","pgn":"1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. dxc5 Nxe4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 g8f6 d4c5 f6e4","epd":"rnbqkb1r/pp2pppp/3p4/2P5/4n3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B50","name":"Sicilian Defense: Modern Variations, Tartakower","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. c3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 c2c3","epd":"rnbqkbnr/pp2pppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"B50","name":"Sicilian Defense: Wing Gambit, Deferred Variation","pgn":"1. e4 c5 2. Nf3 d6 3. b4","uci":"e2e4 c7c5 g1f3 d7d6 b2b4","epd":"rnbqkbnr/pp2pppp/3p4/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"B51","name":"Sicilian Defense: Moscow Variation","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+","uci":"e2e4 c7c5 g1f3 d7d6 f1b5","epd":"rnbqkbnr/pp2pppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"B51","name":"Sicilian Defense: Moscow Variation, Dorfman Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. Qe2 g6 6. e5","uci":"e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 d1e2 g7g6 e4e5","epd":"r2qkbnr/pp1bpp1p/2np2p1/1Bp1P3/8/5N2/PPPPQPPP/RNB2RK1 b kq -"},{"eco":"B51","name":"Sicilian Defense: Moscow Variation, Moscow Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+ Nc6 4. O-O Bd7 5. c3 Nf6 6. Re1 a6 7. Bxc6 Bxc6 8. d4 Bxe4 9. Bg5","uci":"e2e4 c7c5 g1f3 d7d6 f1b5 b8c6 e1g1 c8d7 c2c3 g8f6 f1e1 a7a6 b5c6 d7c6 d2d4 c6e4 c1g5","epd":"r2qkb1r/1p2pppp/p2p1n2/2p3B1/3Pb3/2P2N2/PP3PPP/RN1QR1K1 b kq -"},{"eco":"B52","name":"Sicilian Defense: Moscow Variation, Haag Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. d4","uci":"e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 e1g1 b8c6 c2c3 g8f6 d2d4","epd":"r3kb1r/pp1qpppp/2np1n2/2p5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"B52","name":"Sicilian Defense: Moscow Variation, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7","uci":"e2e4 c7c5 g1f3 d7d6 f1b5 c8d7","epd":"rn1qkbnr/pp1bpppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"B52","name":"Sicilian Defense: Moscow Variation, Sokolsky Variation","pgn":"1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4","uci":"e2e4 c7c5 g1f3 d7d6 f1b5 c8d7 b5d7 d8d7 c2c4","epd":"rn2kbnr/pp1qpppp/3p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"B53","name":"Sicilian Defense: Chekhover Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4","epd":"rnbqkbnr/pp2pppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq -"},{"eco":"B53","name":"Sicilian Defense: Chekhover Variation, Zaitsev Defense","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Bb5 Qd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 d1d4 b8c6 f1b5 d8d7","epd":"r1b1kbnr/pp1qpppp/2np4/1B6/3QP3/5N2/PPP2PPP/RNB1K2R w KQkq -"},{"eco":"B54","name":"Sicilian Defense: Dragon Variation, Accelerated Dragon","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 g6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g7g6","epd":"rnbqkbnr/pp2pp1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B54","name":"Sicilian Defense: Modern Variations, Ginsberg Gambit","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bc4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f1c4","epd":"rnbqkb1r/pp2pppp/3p1n2/8/2BNP3/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"B54","name":"Sicilian Defense: Modern Variations, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6","epd":"rnbqkb1r/pp2pppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"B54","name":"Sicilian Defense: Prins Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3","epd":"rnbqkb1r/pp2pppp/3p1n2/8/3NP3/5P2/PPP3PP/RNBQKB1R b KQkq -"},{"eco":"B55","name":"Sicilian Defense: Prins Variation, Venice Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 f2f3 e7e5 f1b5","epd":"rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/5P2/PPP3PP/RNBQK2R b KQkq -"},{"eco":"B56","name":"Sicilian Defense: Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6","epd":"r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B56","name":"Sicilian Defense: Classical Variation, Fianchetto Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 g2g3","epd":"r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B56","name":"Sicilian Defense: Kupreichik Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 c8d7","epd":"rn1qkb1r/pp1bpppp/3p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B56","name":"Sicilian Defense: Spielmann Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Nde2","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 d4e2","epd":"r1bqkb1r/pp2pppp/2np1n2/8/4P3/2N5/PPP1NPPP/R1BQKB1R b KQkq -"},{"eco":"B56","name":"Sicilian Defense: Venice Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 e7e5 f1b5","epd":"rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"B57","name":"Sicilian Defense: Classical Variation, Anti-Sozin Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 d8b6","epd":"r1b1kb1r/pp2pppp/1qnp1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -"},{"eco":"B57","name":"Sicilian Defense: Classical Variation, Sozin Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1c4","epd":"r1bqkb1r/pp2pppp/2np1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"B57","name":"Sicilian Defense: Magnus Smith Trap","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 g6 7. Nxc6 bxc6 8. e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 g7g6 d4c6 b7c6 e4e5","epd":"r1bqkb1r/p3pp1p/2pp1np1/4P3/2B5/2N5/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"B58","name":"Sicilian Defense: Boleslavsky Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 e7e5","epd":"r1bqkb1r/pp3ppp/2np1n2/4p3/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -"},{"eco":"B58","name":"Sicilian Defense: Boleslavsky Variation, Louma Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nxc6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4c6","epd":"r1bqkb1r/pp3ppp/2Np1n2/4p3/4P3/2N5/PPP1BPPP/R1BQK2R b KQkq -"},{"eco":"B58","name":"Sicilian Defense: Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2","epd":"r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -"},{"eco":"B58","name":"Sicilian Defense: Classical Variation, Dragon Transfer","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 Nxd4 7. Qxd4 g6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 f1e2 c6d4 d1d4 g7g6","epd":"r1bqkb1r/pp2pp1p/3p1np1/8/3QP3/2N5/PPP1BPPP/R1B1K2R w KQkq -"},{"eco":"B59","name":"Sicilian Defense: Boleslavsky Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 e7e5 d4b3","epd":"r1bqkb1r/pp3ppp/2np1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R b KQkq -"},{"eco":"B60","name":"Sicilian Defense: Richter-Rauzer Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5","epd":"r1bqkb1r/pp2pppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B60","name":"Sicilian Defense: Richter-Rauzer Variation, Dragon Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 g6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 g7g6","epd":"r1bqkb1r/pp2pp1p/2np1np1/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B60","name":"Sicilian Defense: Richter-Rauzer Variation, Modern Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 c8d7","epd":"r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B61","name":"Sicilian Defense: Richter-Rauzer Variation, Modern Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 c8d7 d1d2","epd":"r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -"},{"eco":"B62","name":"Sicilian Defense: Richter-Rauzer Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6","epd":"r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -"},{"eco":"B62","name":"Sicilian Defense: Richter-Rauzer Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d3","epd":"r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2NQ4/PPP2PPP/R3KB1R b KQkq -"},{"eco":"B62","name":"Sicilian Defense: Richter-Rauzer Variation, Exchange Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Nxc6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d4c6","epd":"r1bqkb1r/pp3ppp/2Nppn2/6B1/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B62","name":"Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Nb3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d4b3","epd":"r1bqkb1r/pp3ppp/2nppn2/6B1/4P3/1NN5/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B62","name":"Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. 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Nc3 Nc6 6. Bg5 e6 7. Qd2 Qb6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 d8b6","epd":"r1b1kb1r/pp3ppp/1qnppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -"},{"eco":"B63","name":"Sicilian Defense: Richter-Rauzer Variation, Traditional Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2","epd":"r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -"},{"eco":"B64","name":"Sicilian Defense: Richter-Rauzer Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 e6e5","epd":"r1bq1rk1/pp2bppp/2np1n2/4p1B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w - -"},{"eco":"B64","name":"Sicilian Defense: Richter-Rauzer Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4","epd":"r1bq1rk1/pp2bppp/2nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R b - -"},{"eco":"B65","name":"Sicilian Defense: Richter-Rauzer Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 Nxd4 10. Qxd4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4 d2d4","epd":"r1bq1rk1/pp2bppp/3ppn2/6B1/3QPP2/2N5/PPP3PP/2KR1B1R b - -"},{"eco":"B65","name":"Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 Be7 8. O-O-O O-O 9. f4 Nxd4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 f8e7 e1c1 e8g8 f2f4 c6d4","epd":"r1bq1rk1/pp2bppp/3ppn2/6B1/3nPP2/2N5/PPPQ2PP/2KR1B1R w - -"},{"eco":"B66","name":"Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 b8c6 c1g5 e7e6 d1d2 a7a6","epd":"r1bqkb1r/1p3ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -"},{"eco":"B67","name":"Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7","epd":"r2qkb1r/1p1b1ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/2KR1B1R w kq -"},{"eco":"B68","name":"Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7","epd":"r2qk2r/1p1bbppp/p1nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w kq -"},{"eco":"B69","name":"Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7 10. Nf3 b5 11. Bxf6","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 c1g5 e7e6 d1d2 a7a6 e1c1 c8d7 f2f4 f8e7 d4f3 b7b5 g5f6","epd":"r2qk2r/3bbppp/p1nppB2/1p6/4PP2/2N2N2/PPPQ2PP/2KR1B1R b kq -"},{"eco":"B70","name":"Sicilian Defense: Dragon Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6","epd":"rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B70","name":"Sicilian Defense: Dragon Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2","epd":"rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -"},{"eco":"B70","name":"Sicilian Defense: Dragon Variation, Fianchetto Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. g3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 g2g3","epd":"rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B71","name":"Sicilian Defense: Dragon Variation, Levenfish Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4","epd":"rnbqkb1r/pp2pp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -"},{"eco":"B71","name":"Sicilian Defense: Dragon Variation, Levenfish Variation, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nbd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f2f4 b8d7","epd":"r1bqkb1r/pp1npp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3","epd":"rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2","epd":"rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6","epd":"r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R w KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f1e2 b8c6 d4b3","epd":"r1bqk2r/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2","epd":"r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R3K2R b KQkq -"},{"eco":"B72","name":"Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. Qd2 O-O 9. O-O-O","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 g7g6 c1e3 f8g7 d1d2 e8g8 e1c1","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/2KR3R b - -"},{"eco":"B73","name":"Sicilian Defense: Dragon Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O Nc6 8. Be3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 b8c6 c1e3","epd":"r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2Q1RK1 b kq -"},{"eco":"B73","name":"Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Qd2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d1d2","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R4RK1 b - -"},{"eco":"B73","name":"Sicilian Defense: Dragon Variation, Classical Variation, Zollner Gambit","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Be2 Nf6 7. Nc3 O-O 8. O-O d6 9. f4 Qb6 10. e5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 c1e3 f8g7 f1e2 g8f6 b1c3 e8g8 e1g1 d7d6 f2f4 d8b6 e4e5","epd":"r1b2rk1/pp2ppbp/1qnp1np1/4P3/3N1P2/2N1B3/PPP1B1PP/R2Q1RK1 b - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 O-O 8. O-O d6 9. Nb3 a5","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 e1g1 d7d6 d4b3 a7a5","epd":"r1bq1rk1/1p2ppbp/2np1np1/p7/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 w - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Bernard Defense","pgn":"1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Na5 11. f5 Bc4 12. Bd3 Bxd3 13. cxd3 d5","uci":"e2e4 c7c5 g1f3 g7g6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3 c4d3 c2d3 d6d5","epd":"r2q1rk1/pp2ppbp/5np1/n2p1P2/4P3/1NNPB3/PP4PP/R2Q1RK1 w - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Na5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 c6a5","epd":"r2q1rk1/pp2ppbp/3pbnp1/n7/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Normal Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 b - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 O-O 8. Nb3 d6 9. O-O Be6 10. f4 Na5 11. f5 Bc4 12. Bd3","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g7g6 b1c3 f8g7 c1e3 g8f6 f1e2 e8g8 d4b3 d7d6 e1g1 c8e6 f2f4 c6a5 f4f5 e6c4 e2d3","epd":"r2q1rk1/pp2ppbp/3p1np1/n4P2/2b1P3/1NNBB3/PPP3PP/R2Q1RK1 b - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack","pgn":"1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 g6 5. d4 cxd4 6. Nxd4 Bg7 7. Be3 Nf6 8. Be2 O-O 9. Nb3 Be6 10. O-O Na5 11. f5 Bc4 12. Nxa5 Bxe2 13. Qxe2 Qxa5 14. g4","uci":"e2e4 c7c5 b1c3 d7d6 f2f4 b8c6 g1f3 g7g6 d2d4 c5d4 f3d4 f8g7 c1e3 g8f6 f1e2 e8g8 d4b3 c8e6 e1g1 c6a5 f4f5 e6c4 b3a5 c4e2 d1e2 d8a5 g2g4","epd":"r4rk1/pp2ppbp/3p1np1/q4P2/4P1P1/2N1B3/PPP1Q2P/R4RK1 b - -"},{"eco":"B74","name":"Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. O-O O-O 8. Be3 Nc6 9. Nb3 Be6 10. f4 Qc8","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 f1e2 f8g7 e1g1 e8g8 c1e3 b8c6 d4b3 c8e6 f2f4 d8c8","epd":"r1q2rk1/pp2ppbp/2npbnp1/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -"},{"eco":"B75","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6","epd":"r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQkq -"},{"eco":"B75","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3","epd":"rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -"},{"eco":"B75","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Hungarian Dragon","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Nc6 7. f3 h5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 b8c6 f2f3 h7h5","epd":"r1bqkb1r/pp2pp2/2np1np1/7p/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQkq -"},{"eco":"B76","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8","epd":"rnbq1rk1/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQ -"},{"eco":"B76","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/R3KB1R w KQ -"},{"eco":"B76","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. O-O-O","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 e1c1","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/2KR1B1R b - -"},{"eco":"B76","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. g4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 g2g4","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/3NP1P1/2N1BP2/PPPQ3P/R3KB1R b KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Byrne Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 a5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 a7a5","epd":"r1bq1rk1/1p2ppbp/2np1np1/p7/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. Bc4 Nxd4 10. Bxd4 Be6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 c6d4 e3d4 c8e6","epd":"r2q1rk1/pp2ppbp/3pbnp1/8/2BBP3/2N2P2/PPPQ2PP/R3K2R w KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. Bc4 Nxd4 10. Bxd4 Be6 11. Bb3 Qa5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 c6d4 e3d4 c8e6 c4b3 d8a5","epd":"r4rk1/pp2ppbp/3pbnp1/q7/3BP3/1BN2P2/PPPQ2PP/R3K2R w KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R b KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7","epd":"r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. Bb3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 c4b3","epd":"r2q1rk1/pp1bppbp/2np1np1/8/3NP3/1BN1BP2/PPPQ2PP/R3K2R b KQ -"},{"eco":"B77","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. Bc4 Nd7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 b8c6 d1d2 e8g8 f1c4 f6d7","epd":"r1bq1rk1/pp1nppbp/2np2p1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -"},{"eco":"B78","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1","epd":"r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R b - -"},{"eco":"B78","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Chinese Dragon","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rb8","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 a8b8","epd":"1r1q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R w - -"},{"eco":"B78","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rc8","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 a8c8","epd":"2rq1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R w - -"},{"eco":"B78","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Topalov Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rc8 11. Bb3 Nxd4 12. Bxd4","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 a8c8 c4b3 c6d4 e3d4","epd":"2rq1rk1/pp1bppbp/3p1np1/8/3BP3/1BN2P2/PPPQ2PP/2KR3R b - -"},{"eco":"B79","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. h4 Qa5 11. O-O-O Rfc8 12. Bb3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 h2h4 d8a5 e1c1 f8c8 c4b3","epd":"r1r3k1/pp1bppbp/2np1np1/q7/3NP2P/1BN1BP2/PPPQ2P1/2KR3R b - -"},{"eco":"B79","name":"Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Qa5 11. h4 Rfc8 12. Bb3 h5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 g7g6 c1e3 f8g7 f2f3 e8g8 d1d2 b8c6 f1c4 c8d7 e1c1 d8a5 h2h4 f8c8 c4b3 h7h5","epd":"r1r3k1/pp1bppb1/2np1np1/q6p/3NP2P/1BN1BP2/PPPQ2P1/2KR3R w - -"},{"eco":"B80","name":"Sicilian Defense: Scheveningen Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6","epd":"rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"B80","name":"Sicilian Defense: Scheveningen Variation, English Attack, with Qd2","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Qd2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 d1d2","epd":"rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1B3/PPPQ1PPP/R3KB1R b KQkq -"},{"eco":"B80","name":"Sicilian Defense: Scheveningen Variation, Fianchetto Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g3","epd":"rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B80","name":"Sicilian Defense: Scheveningen Variation, Vitolins Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bb5+","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1b5","epd":"rnbqkb1r/pp3ppp/3ppn2/1B6/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"B81","name":"Sicilian Defense: Scheveningen Variation, Keres Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 g2g4","epd":"rnbqkb1r/pp3ppp/3ppn2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B82","name":"Sicilian Defense: Scheveningen Variation, Matanovic Attack","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4","epd":"rnbqkb1r/pp3ppp/3ppn2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -"},{"eco":"B82","name":"Sicilian Defense: Scheveningen Variation, Tal Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f4 Nc6 7. Be3 Be7 8. Qf3","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f2f4 b8c6 c1e3 f8e7 d1f3","epd":"r1bqk2r/pp2bppp/2nppn2/8/3NPP2/2N1BQ2/PPP3PP/R3KB1R b KQkq -"},{"eco":"B83","name":"Sicilian Defense: Scheveningen Variation, Classical Variation","pgn":"1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. 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Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4","uci":"e2e4 c7c5 g1f3 e7e6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4","epd":"rnbqkb1r/pp3ppp/3ppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"B87","name":"Sicilian Defense: Sozin Attack, Flank Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1c4 e7e6 c4b3 b7b5","epd":"rnbqkb1r/5ppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQK2R w KQkq -"},{"eco":"B88","name":"Sicilian Defense: Sozin Attack, Fischer Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Bb3 Be7 8. Be3 O-O 9. f4","uci":"e2e4 c7c5 g1f3 b8c6 d2d4 c5d4 f3d4 g8f6 b1c3 d7d6 f1c4 e7e6 c4b3 f8e7 c1e3 e8g8 f2f4","epd":"r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/1BN1B3/PPP3PP/R2QK2R b KQ -"},{"eco":"B88","name":"Sicilian Defense: Sozin Attack, Leonhardt Variation","pgn":"1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. 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Be3 e6 7. f3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1e3 e7e6 f2f3","epd":"rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -"},{"eco":"B91","name":"Sicilian Defense: Najdorf Variation, Zagreb Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 g2g3","epd":"rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"B92","name":"Sicilian Defense: Najdorf Variation, Opocensky Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2","epd":"rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -"},{"eco":"B92","name":"Sicilian Defense: Najdorf Variation, Opocensky Variation","pgn":"1. e4 c5 2. Nf3 Nf6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e5 7. Nb3 Be6 8. Be3","uci":"e2e4 c7c5 g1f3 g8f6 b1c3 d7d6 d2d4 c5d4 f3d4 a7a6 f1e2 e7e5 d4b3 c8e6 c1e3","epd":"rn1qkb1r/1p3ppp/p2pbn2/4p3/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -"},{"eco":"B92","name":"Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O Be6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 c8e6","epd":"rn1qk2r/1p2bppp/p2pbn2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w kq -"},{"eco":"B92","name":"Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O O-O","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 f1e2 e7e5 d4b3 f8e7 e1g1 e8g8","epd":"rnbq1rk1/1p2bppp/p2p1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQ1RK1 w - -"},{"eco":"B93","name":"Sicilian Defense: Najdorf Variation, Amsterdam Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. 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Rb1 Qa3","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6 d1d2 b6b2 a1b1 b2a3","epd":"rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq -"},{"eco":"B97","name":"Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 d8b6","epd":"rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -"},{"eco":"B98","name":"Sicilian Defense: Najdorf Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7","uci":"e2e4 c7c5 g1f3 d7d6 d2d4 c5d4 f3d4 g8f6 b1c3 a7a6 c1g5 e7e6 f2f4 f8e7","epd":"rnbqk2r/1p2bppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -"},{"eco":"B98","name":"Sicilian Defense: Najdorf Variation, Browne Variation","pgn":"1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 h6 9. 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Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4 Nbc6 8. Nf3 Qa5 9. Bd2","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 a3a4 b8c6 g1f3 d8a5 c1d2","epd":"r1b1k2r/pp2nppp/2n1p3/q1ppP3/P2P4/2P2N2/2PB1PPP/R2QKB1R b KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4 Nbc6 8. Nf3 Qa5 9. Bd2 Bd7","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 a3a4 b8c6 g1f3 d8a5 c1d2 c8d7","epd":"r3k2r/pp1bnppp/2n1p3/q1ppP3/P2P4/2P2N2/2PB1PPP/R2QKB1R w KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. a4 Nbc6 8. Nf3 Qa5 9. Bd2 c4","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 a3a4 b8c6 g1f3 d8a5 c1d2 c5c4","epd":"r1b1k2r/pp2nppp/2n1p3/q2pP3/P1pP4/2P2N2/2PB1PPP/R2QKB1R w KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 g1f3","epd":"rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R b KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Nc6 7. Nf3 Nge7","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 b8c6 g1f3 g8e7","epd":"r1bqk2r/pp2nppp/2n1p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R w KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qc7","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 g1f3 d8c7","epd":"rnb1k2r/ppq1nppp/4p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R w KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Qc7 8. h4","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 g1f3 d8c7 h2h4","epd":"rnb1k2r/ppq1nppp/4p3/2ppP3/3P3P/P1P2N2/2P2PP1/R1BQKB1R b KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Bd3 Nbc6 8. Nf3","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 g8e7 f1d3 b8c6 g1f3","epd":"r1bqk2r/pp2nppp/2n1p3/2ppP3/3P4/P1PB1N2/2P2PPP/R1BQK2R b KQkq -"},{"eco":"C19","name":"French Defense: Winawer Variation, Positional Variation","pgn":"1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Nc6 7. Nf3 Qa5 8. Bd2 Nge7","uci":"e2e4 e7e6 d2d4 d7d5 b1c3 f8b4 e4e5 c7c5 a2a3 b4c3 b2c3 b8c6 g1f3 d8a5 c1d2 g8e7","epd":"r1b1k2r/pp2nppp/2n1p3/q1ppP3/3P4/P1P2N2/2PB1PPP/R2QKB1R w KQkq -"},{"eco":"C20","name":"Barnes Opening: Walkerling","pgn":"1. f3 e5 2. e4 Nf6 3. Bc4","uci":"f2f3 e7e5 e2e4 g8f6 f1c4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5P2/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C20","name":"Bongcloud Attack","pgn":"1. e4 e5 2. Ke2","uci":"e2e4 e7e5 e1e2","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPKPPP/RNBQ1BNR b kq -"},{"eco":"C20","name":"Center Game","pgn":"1. e4 e5 2. d4","uci":"e2e4 e7e5 d2d4","epd":"rnbqkbnr/pppp1ppp/8/4p3/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"English Opening: The Whale","pgn":"1. e4 e5 2. c4","uci":"e2e4 e7e5 c2c4","epd":"rnbqkbnr/pppp1ppp/8/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game","pgn":"1. e4 e5","uci":"e2e4 e7e5","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Alapin Opening","pgn":"1. e4 e5 2. Ne2","uci":"e2e4 e7e5 g1e2","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Bavarian Gambit","pgn":"1. e4 e5 2. c4 d5","uci":"e2e4 e7e5 c2c4 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Beyer Gambit","pgn":"1. e4 e5 2. d4 d5","uci":"e2e4 e7e5 d2d4 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Clam Variation, King's Gambit Reversed","pgn":"1. e4 e5 2. d3 f5","uci":"e2e4 e7e5 d2d3 f7f5","epd":"rnbqkbnr/pppp2pp/8/4pp2/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Clam Variation, Radisch Gambit","pgn":"1. e4 e5 2. d3 Nf6 3. f4 Bc5","uci":"e2e4 e7e5 d2d3 g8f6 f2f4 f8c5","epd":"rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/3P4/PPP3PP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: King's Head Opening","pgn":"1. e4 e5 2. f3","uci":"e2e4 e7e5 f2f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: King's Head Opening","pgn":"1. e4 e5 2. f3 Nf6 3. Nc3","uci":"e2e4 e7e5 f2f3 g8f6 b1c3","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2P2/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Leonardis Variation","pgn":"1. e4 e5 2. d3","uci":"e2e4 e7e5 d2d3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: MacLeod Attack","pgn":"1. e4 e5 2. c3","uci":"e2e4 e7e5 c2c3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: MacLeod Attack, Lasa Gambit","pgn":"1. e4 e5 2. c3 f5","uci":"e2e4 e7e5 c2c3 f7f5","epd":"rnbqkbnr/pppp2pp/8/4pp2/4P3/2P5/PP1P1PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: MacLeod Attack, Norwalde Gambit","pgn":"1. e4 e5 2. c3 d5 3. Qh5 Bd6","uci":"e2e4 e7e5 c2c3 d7d5 d1h5 f8d6","epd":"rnbqk1nr/ppp2ppp/3b4/3pp2Q/4P3/2P5/PP1P1PPP/RNB1KBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Mengarini's Opening","pgn":"1. e4 e5 2. a3","uci":"e2e4 e7e5 a2a3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Napoleon Attack","pgn":"1. e4 e5 2. Qf3","uci":"e2e4 e7e5 d1f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Philidor Gambit","pgn":"1. e4 e5 2. d4 d6 3. dxe5 Bd7","uci":"e2e4 e7e5 d2d4 d7d6 d4e5 c8d7","epd":"rn1qkbnr/pppb1ppp/3p4/4P3/4P3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Tortoise Opening","pgn":"1. e4 e5 2. Bd3","uci":"e2e4 e7e5 f1d3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/3B4/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Wayward Queen Attack","pgn":"1. e4 e5 2. Qh5","uci":"e2e4 e7e5 d1h5","epd":"rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Game: Wayward Queen Attack, Kiddie Countergambit","pgn":"1. e4 e5 2. Qh5 Nf6","uci":"e2e4 e7e5 d1h5 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Wayward Queen Attack, Mellon Gambit","pgn":"1. e4 e5 2. Qh5 Nc6 3. Bc4 Nh6 4. d3 g6 5. Qf3 f6 6. Ne2 d5","uci":"e2e4 e7e5 d1h5 b8c6 f1c4 g8h6 d2d3 g7g6 h5f3 f7f6 g1e2 d7d5","epd":"r1bqkb1r/ppp4p/2n2ppn/3pp3/2B1P3/3P1Q2/PPP1NPPP/RNB1K2R w KQkq -"},{"eco":"C20","name":"King's Pawn Game: Weber Gambit","pgn":"1. e4 e5 2. d3 d5 3. exd5 c6 4. dxc6 Nxc6","uci":"e2e4 e7e5 d2d3 d7d5 e4d5 c7c6 d5c6 b8c6","epd":"r1bqkbnr/pp3ppp/2n5/4p3/8/3P4/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"C20","name":"King's Pawn Opening","pgn":"1. e4 e5 2. b3","uci":"e2e4 e7e5 b2b3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Opening: Speers","pgn":"1. e4 e5 2. Qg4 Nf6 3. Qf5","uci":"e2e4 e7e5 d1g4 g8f6 g4f5","epd":"rnbqkb1r/pppp1ppp/5n2/4pQ2/4P3/8/PPPP1PPP/RNB1KBNR b KQkq -"},{"eco":"C20","name":"King's Pawn Opening: Van Hooydoon Gambit","pgn":"1. e4 e5 2. Qe2 Nc6 3. c3 Nf6 4. Nf3 Bc5 5. d4 exd4 6. cxd4 Nxd4","uci":"e2e4 e7e5 d1e2 b8c6 c2c3 g8f6 g1f3 f8c5 d2d4 e5d4 c3d4 c6d4","epd":"r1bqk2r/pppp1ppp/5n2/2b5/3nP3/5N2/PP2QPPP/RNB1KB1R w KQkq -"},{"eco":"C20","name":"Portuguese Opening","pgn":"1. e4 e5 2. Bb5","uci":"e2e4 e7e5 f1b5","epd":"rnbqkbnr/pppp1ppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"C20","name":"Portuguese Opening: Miguel Gambit","pgn":"1. e4 e5 2. Bb5 Bc5 3. b4","uci":"e2e4 e7e5 f1b5 f8c5 b2b4","epd":"rnbqk1nr/pppp1ppp/8/1Bb1p3/1P2P3/8/P1PP1PPP/RNBQK1NR b KQkq -"},{"eco":"C20","name":"Portuguese Opening: Portuguese Gambit","pgn":"1. e4 e5 2. Bb5 Nf6 3. d4","uci":"e2e4 e7e5 f1b5 g8f6 d2d4","epd":"rnbqkb1r/pppp1ppp/5n2/1B2p3/3PP3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C21","name":"Center Game","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4","uci":"e2e4 e7e5 d2d4 e5d4 d1d4","epd":"rnbqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KBNR b KQkq -"},{"eco":"C21","name":"Center Game Accepted","pgn":"1. e4 e5 2. d4 exd4","uci":"e2e4 e7e5 d2d4 e5d4","epd":"rnbqkbnr/pppp1ppp/8/8/3pP3/8/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"C21","name":"Center Game: Halasz-McDonnell Gambit","pgn":"1. e4 e5 2. d4 exd4 3. f4","uci":"e2e4 e7e5 d2d4 e5d4 f2f4","epd":"rnbqkbnr/pppp1ppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"C21","name":"Center Game: Halasz-McDonnell Gambit, Crocodile Variation","pgn":"1. e4 e5 2. d4 exd4 3. f4 Bc5 4. Nf3 Nc6 5. c3","uci":"e2e4 e7e5 d2d4 e5d4 f2f4 f8c5 g1f3 b8c6 c2c3","epd":"r1bqk1nr/pppp1ppp/2n5/2b5/3pPP2/2P2N2/PP4PP/RNBQKB1R b KQkq -"},{"eco":"C21","name":"Center Game: Kieseritzky Variation","pgn":"1. e4 e5 2. d4 exd4 3. Nf3","uci":"e2e4 e7e5 d2d4 e5d4 g1f3","epd":"rnbqkbnr/pppp1ppp/8/8/3pP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C21","name":"Center Game: Kieseritzky Variation","pgn":"1. e4 e5 2. d4 exd4 3. Nf3 c5","uci":"e2e4 e7e5 d2d4 e5d4 g1f3 c7c5","epd":"rnbqkbnr/pp1p1ppp/8/2p5/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C21","name":"Center Game: Kieseritzky Variation","pgn":"1. e4 e5 2. d4 exd4 3. Nf3 c5 4. Bc4","uci":"e2e4 e7e5 d2d4 e5d4 g1f3 c7c5 f1c4","epd":"rnbqkbnr/pp1p1ppp/8/2p5/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C21","name":"Center Game: Lanc-Arnold Gambit","pgn":"1. e4 e5 2. d4 exd4 3. Nf3 Bc5 4. c3","uci":"e2e4 e7e5 d2d4 e5d4 g1f3 f8c5 c2c3","epd":"rnbqk1nr/pppp1ppp/8/2b5/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"C21","name":"Center Game: Lanc-Arnold Gambit, Schippler Gambit","pgn":"1. e4 e5 2. d4 exd4 3. Nf3 Bc5 4. c3 dxc3 5. Bc4","uci":"e2e4 e7e5 d2d4 e5d4 g1f3 f8c5 c2c3 d4c3 f1c4","epd":"rnbqk1nr/pppp1ppp/8/2b5/2B1P3/2p2N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C21","name":"Center Game: Ross Gambit","pgn":"1. e4 e5 2. d4 exd4 3. Bd3","uci":"e2e4 e7e5 d2d4 e5d4 f1d3","epd":"rnbqkbnr/pppp1ppp/8/8/3pP3/3B4/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C21","name":"Center Game: von der Lasa Gambit","pgn":"1. e4 e5 2. d4 exd4 3. Bc4","uci":"e2e4 e7e5 d2d4 e5d4 f1c4","epd":"rnbqkbnr/pppp1ppp/8/8/2BpP3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C21","name":"Danish Gambit","pgn":"1. e4 e5 2. d4 exd4 3. c3","uci":"e2e4 e7e5 d2d4 e5d4 c2c3","epd":"rnbqkbnr/pppp1ppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted","pgn":"1. e4 e5 2. d4 exd4 3. c3 dxc3","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d4c3","epd":"rnbqkbnr/pppp1ppp/8/8/4P3/2p5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted: Chigorin Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Qe7","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d8e7","epd":"rnb1kbnr/ppppqppp/8/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted: Classical Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Nf6","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted: Copenhagen Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 Bb4+","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 f8b4","epd":"rnbqk1nr/pppp1ppp/8/8/1bB1P3/8/PB3PPP/RN1QK1NR w KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted: Schlechter Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 dxc3 4. Bc4 cxb2 5. Bxb2 d5","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d4c3 f1c4 c3b2 c1b2 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3p4/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -"},{"eco":"C21","name":"Danish Gambit Accepted: Svenonius Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 Ne7","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 g8e7","epd":"rnbqkb1r/ppppnppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"C21","name":"Danish Gambit Declined: Sörensen Defense","pgn":"1. e4 e5 2. d4 exd4 3. c3 d5","uci":"e2e4 e7e5 d2d4 e5d4 c2c3 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"C22","name":"Center Game: Berger Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/8/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -"},{"eco":"C22","name":"Center Game: Charousek Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Bb4+ 5. c3 Be7","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f8b4 c2c3 b4e7","epd":"r1bqk1nr/ppppbppp/2n5/8/4P3/2P1Q3/PP3PPP/RNB1KBNR w KQkq -"},{"eco":"C22","name":"Center Game: Hall Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4c4","epd":"r1bqkbnr/pppp1ppp/2n5/8/2Q1P3/8/PPP2PPP/RNB1KBNR b KQkq -"},{"eco":"C22","name":"Center Game: Kupreichik Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Re8 8. Bc4 d6 9. Nh3","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 g8f6 b1c3 f8b4 c1d2 e8g8 e1c1 f8e8 f1c4 d7d6 g1h3","epd":"r1bqr1k1/ppp2ppp/2np1n2/8/1bB1P3/2N1Q2N/PPPB1PPP/2KR3R b - -"},{"eco":"C22","name":"Center Game: Normal Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/8/3QP3/8/PPP2PPP/RNB1KBNR w KQkq -"},{"eco":"C22","name":"Center Game: Paulsen Attack Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3","epd":"r1bqkbnr/pppp1ppp/2n5/8/4P3/4Q3/PPP2PPP/RNB1KBNR b KQkq -"},{"eco":"C22","name":"Center Game: l'Hermet Variation","pgn":"1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 f5","uci":"e2e4 e7e5 d2d4 e5d4 d1d4 b8c6 d4e3 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/5p2/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -"},{"eco":"C23","name":"Bishop's Opening","pgn":"1. e4 e5 2. Bc4","uci":"e2e4 e7e5 f1c4","epd":"rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Anderssen Gambit","pgn":"1. e4 e5 2. Bc4 b5 3. Bxb5 c6","uci":"e2e4 e7e5 f1c4 b7b5 c4b5 c7c6","epd":"rnbqkbnr/p2p1ppp/2p5/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Boi Variation","pgn":"1. e4 e5 2. Bc4 Bc5","uci":"e2e4 e7e5 f1c4 f8c5","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Calabrese Countergambit","pgn":"1. e4 e5 2. Bc4 f5","uci":"e2e4 e7e5 f1c4 f7f5","epd":"rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Calabrese Countergambit, Jaenisch Variation","pgn":"1. e4 e5 2. Bc4 f5 3. d3","uci":"e2e4 e7e5 f1c4 f7f5 d2d3","epd":"rnbqkbnr/pppp2pp/8/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Four Pawns Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4 exf4 5. Nf3 Be7 6. d4 Bh4+ 7. g3 fxg3 8. O-O gxh2+ 9. Kh1","uci":"e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4 e5f4 g1f3 b4e7 d2d4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1","epd":"rnbqk1nr/pppp1ppp/8/8/2BPP2b/5N2/P1P4p/RNBQ1R1K b kq -"},{"eco":"C23","name":"Bishop's Opening: Khan Gambit","pgn":"1. e4 e5 2. Bc4 d5","uci":"e2e4 e7e5 f1c4 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lewis Countergambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3 d5","uci":"e2e4 e7e5 f1c4 f8c5 c2c3 d7d5","epd":"rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lewis Countergambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3 d5 4. Bxd5 Nf6","uci":"e2e4 e7e5 f1c4 f8c5 c2c3 d7d5 c4d5 g8f6","epd":"rnbqk2r/ppp2ppp/5n2/2bBp3/4P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lewis Countergambit, Walker Variation","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3 d5 4. Bxd5 Nf6 5. d4","uci":"e2e4 e7e5 f1c4 f8c5 c2c3 d7d5 c4d5 g8f6 d2d4","epd":"rnbqk2r/ppp2ppp/5n2/2bBp3/3PP3/2P5/PP3PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lewis Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. d4","uci":"e2e4 e7e5 f1c4 f8c5 d2d4","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lisitsyn Variation","pgn":"1. e4 e5 2. Bc4 c6 3. d4 d5 4. exd5 cxd5 5. Bb5+ Bd7 6. Bxd7+ Nxd7 7. dxe5 Nxe5 8. Ne2","uci":"e2e4 e7e5 f1c4 c7c6 d2d4 d7d5 e4d5 c6d5 c4b5 c8d7 b5d7 b8d7 d4e5 d7e5 g1e2","epd":"r2qkbnr/pp3ppp/8/3pn3/8/8/PPP1NPPP/RNBQK2R b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lopez Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. Qe2 Nc6 4. c3 Nf6 5. f4","uci":"e2e4 e7e5 f1c4 f8c5 d1e2 b8c6 c2c3 g8f6 f2f4","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1PP2/2P5/PP1PQ1PP/RNB1K1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lopez Variation","pgn":"1. e4 e5 2. Bc4 Bc5 3. Qe2","uci":"e2e4 e7e5 f1c4 f8c5 d1e2","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPPQPPP/RNB1K1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Lopez Variation, Lopez Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. Qe2 Nf6 4. f4","uci":"e2e4 e7e5 f1c4 f8c5 d1e2 g8f6 f2f4","epd":"rnbqk2r/pppp1ppp/5n2/2b1p3/2B1PP2/8/PPPPQ1PP/RNB1K1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: McDonnell Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. b4","uci":"e2e4 e7e5 f1c4 f8c5 b2b4","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/1PB1P3/8/P1PP1PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. c3","uci":"e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 c2c3","epd":"rnbqk1nr/pppp1ppp/8/4p3/1bB1P3/2P5/P2P1PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. b4 Bxb4 4. f4","uci":"e2e4 e7e5 f1c4 f8c5 b2b4 c5b4 f2f4","epd":"rnbqk1nr/pppp1ppp/8/4p3/1bB1PP2/8/P1PP2PP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Philidor Counterattack","pgn":"1. e4 e5 2. Bc4 c6","uci":"e2e4 e7e5 f1c4 c7c6","epd":"rnbqkbnr/pp1p1ppp/2p5/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: Philidor Variation","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3","uci":"e2e4 e7e5 f1c4 f8c5 c2c3","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/2P5/PP1P1PPP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Pratt Variation","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3 Nf6 4. d4 exd4 5. e5 d5 6. exf6 dxc4 7. Qh5 O-O","uci":"e2e4 e7e5 f1c4 f8c5 c2c3 g8f6 d2d4 e5d4 e4e5 d7d5 e5f6 d5c4 d1h5 e8g8","epd":"rnbq1rk1/ppp2ppp/5P2/2b4Q/2pp4/2P5/PP3PPP/RNB1K1NR w KQ -"},{"eco":"C23","name":"Bishop's Opening: Stein Gambit","pgn":"1. e4 e5 2. Bc4 Bc5 3. f4","uci":"e2e4 e7e5 f1c4 f8c5 f2f4","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C23","name":"Bishop's Opening: Thorold Gambit","pgn":"1. e4 e5 2. Bc4 b5 3. Bxb5 f5","uci":"e2e4 e7e5 f1c4 b7b5 c4b5 f7f5","epd":"rnbqkbnr/p1pp2pp/8/1B2pp2/4P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C23","name":"Bishop's Opening: del Rio Variation","pgn":"1. e4 e5 2. Bc4 Bc5 3. c3 Qg5","uci":"e2e4 e7e5 f1c4 f8c5 c2c3 d8g5","epd":"rnb1k1nr/pppp1ppp/8/2b1p1q1/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -"},{"eco":"C24","name":"Bishop's Opening: Berlin Defense","pgn":"1. e4 e5 2. Bc4 Nf6","uci":"e2e4 e7e5 f1c4 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -"},{"eco":"C24","name":"Bishop's Opening: Berlin Defense, Greco Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. f4","uci":"e2e4 e7e5 f1c4 g8f6 f2f4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C24","name":"Bishop's Opening: Kitchener Folly","pgn":"1. e4 e5 2. Bc4 Nf6 3. d3 Be7 4. Nf3 O-O","uci":"e2e4 e7e5 f1c4 g8f6 d2d3 f8e7 g1f3 e8g8","epd":"rnbq1rk1/ppppbppp/5n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQ -"},{"eco":"C24","name":"Bishop's Opening: Krejcik Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. f3 Bc5 4. Ne2 Nc6 5. b4","uci":"e2e4 e7e5 f1c4 g8f6 f2f3 f8c5 g1e2 b8c6 b2b4","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/1PB1P3/5P2/P1PPN1PP/RNBQK2R b KQkq -"},{"eco":"C24","name":"Bishop's Opening: Pachman Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. Ne2 Nxe4 4. Nec3","uci":"e2e4 e7e5 f1c4 g8f6 g1e2 f6e4 e2c3","epd":"rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C24","name":"Bishop's Opening: Paulsen Defense","pgn":"1. e4 e5 2. Bc4 Nf6 3. d3 c6","uci":"e2e4 e7e5 f1c4 g8f6 d2d3 c7c6","epd":"rnbqkb1r/pp1p1ppp/2p2n2/4p3/2B1P3/3P4/PPP2PPP/RNBQK1NR w KQkq -"},{"eco":"C24","name":"Bishop's Opening: Ponziani Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. d4","uci":"e2e4 e7e5 f1c4 g8f6 d2d4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"C24","name":"Bishop's Opening: Urusov Gambit, Panov Variation","pgn":"1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 d5 5. exd5 Bb4+ 6. c3 Qe7+","uci":"e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3 d7d5 e4d5 f8b4 c2c3 d8e7","epd":"rnb1k2r/ppp1qppp/5n2/3P4/1bBp4/2P2N2/PP3PPP/RNBQK2R w KQkq -"},{"eco":"C24","name":"Bishop's Opening: Vienna Hybrid","pgn":"1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3","uci":"e2e4 e7e5 f1c4 g8f6 d2d3 b8c6 b1c3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2NP4/PPP2PPP/R1BQK1NR b KQkq -"},{"eco":"C24","name":"Bishop's Opening: Warsaw Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. c3","uci":"e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 c2c3","epd":"rnbqkb1r/pppp1ppp/5n2/8/2BpP3/2P5/PP3PPP/RNBQK1NR b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4","uci":"e2e4 e7e5 b1c3 b8c6 f2f4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Cunningham Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 Be7","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 f8e7","epd":"r1bqk1nr/ppppbppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5","epd":"r1bqkbnr/pppp1p1p/2n5/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Alapin Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. h4 g4 6. Ng5 d6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 d7d6","epd":"r1bqkbnr/ppp2p1p/2np4/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R w KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Thorold Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Nc3 g5 5. h4 g4 6. Ng5 h6 7. Nxf7 Kxf7 8. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 b8c6 b1c3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4","epd":"r1bq1bnr/pppp1k2/2n4p/8/3PPppP/2N5/PPP3P1/R1BQKB1R b KQ -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Hamppe-Muzio Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3","epd":"r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/2N2p2/PPPP2PP/R1BQ1RK1 w kq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Knight Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3","epd":"r1bqkbnr/pppp1ppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Pierce Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4","epd":"r1bqkbnr/pppp1p1p/2n5/6p1/3PPp2/2N2N2/PPP3PP/R1BQKB1R b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Quelle Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 Bc5 4. fxe5 d6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 f8c5 f4e5 d7d6","epd":"r1bqk1nr/ppp2ppp/2np4/2b1P3/4P3/2N5/PPPP2PP/R1BQKBNR w KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4","epd":"r1bqkbnr/pppp1ppp/2n5/8/3PPp2/2N5/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Fraser-Minckwitz Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 b6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 b7b6","epd":"r1b1kbnr/p1pp1ppp/1pn5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Main Line","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2","epd":"r1b1kbnr/pppp1ppp/2n5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR b kq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Paulsen Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 d7d6","epd":"r1b1kbnr/ppp2ppp/2np4/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Sörensen Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 g5","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 g7g5","epd":"r1b1kbnr/pppp1p1p/2n5/6p1/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -"},{"eco":"C25","name":"Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Zukertort Defense","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. d4 Qh4+ 5. Ke2 d5","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 d2d4 d8h4 e1e2 d7d5","epd":"r1b1kbnr/ppp2ppp/2n5/3p4/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -"},{"eco":"C25","name":"Vienna Game","pgn":"1. e4 e5 2. Nc3","uci":"e2e4 e7e5 b1c3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Anderssen Defense","pgn":"1. e4 e5 2. Nc3 Bc5","uci":"e2e4 e7e5 b1c3 f8c5","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"C25","name":"Vienna Game: Fyfe Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. d4","uci":"e2e4 e7e5 b1c3 b8c6 d2d4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Giraffe Attack","pgn":"1. e4 e5 2. Nc3 Bc5 3. Qg4","uci":"e2e4 e7e5 b1c3 f8c5 d1g4","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/4P1Q1/2N5/PPPP1PPP/R1B1KBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Hamppe-Meitner Variation","pgn":"1. e4 e5 2. Nc3 Bc5 3. Na4","uci":"e2e4 e7e5 b1c3 f8c5 c3a4","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/N3P3/8/PPPP1PPP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Hamppe-Muzio Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1","epd":"r1bqkbnr/pppp1p1p/2n5/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQ1RK1 b kq -"},{"eco":"C25","name":"Vienna Game: Hamppe-Muzio, Dubois Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. Bc4 g4 6. O-O gxf3 7. Qxf3 Ne5 8. Qxf4 Qf6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 c6e5 f3f4 d8f6","epd":"r1b1kbnr/pppp1p1p/5q2/4n3/2B1PQ2/2N5/PPPP2PP/R1B2RK1 w kq -"},{"eco":"C25","name":"Vienna Game: Max Lange Defense","pgn":"1. e4 e5 2. Nc3 Nc6","uci":"e2e4 e7e5 b1c3 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"C25","name":"Vienna Game: Omaha Gambit","pgn":"1. e4 e5 2. Nc3 d6 3. f4","uci":"e2e4 e7e5 b1c3 d7d6 f2f4","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Paulsen Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. g3","uci":"e2e4 e7e5 b1c3 b8c6 g2g3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"C25","name":"Vienna Game: Paulsen Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 Bc5 5. Nge2 d5","uci":"e2e4 e7e5 b1c3 b8c6 g2g3 g8f6 f1g2 f8c5 g1e2 d7d5","epd":"r1bqk2r/ppp2ppp/2n2n2/2bpp3/4P3/2N3P1/PPPPNPBP/R1BQK2R w KQkq -"},{"eco":"C25","name":"Vienna Game: Paulsen Variation, Mariotti Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 h5 5. Nf3 h4","uci":"e2e4 e7e5 b1c3 b8c6 g2g3 f8c5 f1g2 h7h5 g1f3 h5h4","epd":"r1bqk1nr/pppp1pp1/2n5/2b1p3/4P2p/2N2NP1/PPPP1PBP/R1BQK2R w KQkq -"},{"eco":"C25","name":"Vienna Game: Philidor Countergambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. d4 f5","uci":"e2e4 e7e5 b1c3 b8c6 d2d4 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"C25","name":"Vienna Game: Pierce Gambit, Rushmere Attack","pgn":"1. e4 e5 2. Nc3 Nc6 3. f4 exf4 4. Nf3 g5 5. d4 g4 6. Bc4 gxf3 7. O-O d5 8. exd5 Bg4 9. dxc6","uci":"e2e4 e7e5 b1c3 b8c6 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f1c4 g4f3 e1g1 d7d5 e4d5 c8g4 d5c6","epd":"r2qkbnr/ppp2p1p/2P5/8/2BP1pb1/2N2p2/PPP3PP/R1BQ1RK1 b kq -"},{"eco":"C25","name":"Vienna Game: Stanley Variation, Meitner-Mieses Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. Bc4 Bc5 4. Qg4 Qf6 5. Nd5","uci":"e2e4 e7e5 b1c3 b8c6 f1c4 f8c5 d1g4 d8f6 c3d5","epd":"r1b1k1nr/pppp1ppp/2n2q2/2bNp3/2B1P1Q1/8/PPPP1PPP/R1B1K1NR b KQkq -"},{"eco":"C25","name":"Vienna Game: Zhuravlev Countergambit","pgn":"1. e4 e5 2. Nc3 Bb4 3. Qg4 Nf6","uci":"e2e4 e7e5 b1c3 f8b4 d1g4 g8f6","epd":"rnbqk2r/pppp1ppp/5n2/4p3/1b2P1Q1/2N5/PPPP1PPP/R1B1KBNR w KQkq -"},{"eco":"C26","name":"Bishop's Opening: Horwitz Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. Nc3 b5","uci":"e2e4 e7e5 f1c4 g8f6 b1c3 b7b5","epd":"rnbqkb1r/p1pp1ppp/5n2/1p2p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -"},{"eco":"C26","name":"Bishop's Opening: Vienna Hybrid, Spielmann Attack","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. d3","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f8c5 d2d3","epd":"rnbqk2r/pppp1ppp/5n2/2b1p3/2B1P3/2NP4/PPP2PPP/R1BQK1NR b KQkq -"},{"eco":"C26","name":"Vienna Game: Falkbeer Variation","pgn":"1. e4 e5 2. Nc3 Nf6","uci":"e2e4 e7e5 b1c3 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -"},{"eco":"C26","name":"Vienna Game: Mengarini Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. a3","uci":"e2e4 e7e5 b1c3 g8f6 a2a3","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/P1N5/1PPP1PPP/R1BQKBNR b KQkq -"},{"eco":"C26","name":"Vienna Game: Mieses Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. g3","uci":"e2e4 e7e5 b1c3 g8f6 g2g3","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -"},{"eco":"C26","name":"Vienna Game: Mieses Variation, Erben Gambit","pgn":"1. e4 e5 2. Nc3 Nf6 3. g3 d5 4. exd5 c6","uci":"e2e4 e7e5 b1c3 g8f6 g2g3 d7d5 e4d5 c7c6","epd":"rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -"},{"eco":"C26","name":"Vienna Game: Paulsen Variation, Pollock Gambit","pgn":"1. e4 e5 2. Nc3 Nf6 3. g3 Bc5 4. Bg2 Nc6 5. Nge2 d5 6. exd5","uci":"e2e4 e7e5 b1c3 g8f6 g2g3 f8c5 f1g2 b8c6 g1e2 d7d5 e4d5","epd":"r1bqk2r/ppp2ppp/2n2n2/2bPp3/8/2N3P1/PPPPNPBP/R1BQK2R b KQkq -"},{"eco":"C26","name":"Vienna Game: Stanley Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4","uci":"e2e4 e7e5 b1c3 g8f6 f1c4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -"},{"eco":"C26","name":"Vienna Game: Stanley Variation, Eifel Gambit","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. Nge2 b5","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f8c5 g1e2 b7b5","epd":"rnbqk2r/p1pp1ppp/5n2/1pb1p3/2B1P3/2N5/PPPPNPPP/R1BQK2R w KQkq -"},{"eco":"C26","name":"Vienna Game: Stanley Variation, Reversed Spanish","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f8b4","epd":"rnbqk2r/pppp1ppp/5n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -"},{"eco":"C27","name":"Bishop's Opening: Boden-Kieseritzky Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3","uci":"e2e4 e7e5 g1f3 g8f6 f1c4 f6e4 b1c3","epd":"rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C27","name":"Bishop's Opening: Boden-Kieseritzky Gambit, Lichtenhein Defense","pgn":"1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 d5","uci":"e2e4 e7e5 g1f3 g8f6 f1c4 f6e4 b1c3 d7d5","epd":"rnbqkb1r/ppp2ppp/8/3pp3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C27","name":"Vienna Game: Adams' Gambit","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. d4","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 d2d4","epd":"r1bqkb1r/pppp1ppp/2nn4/4p2Q/3P4/1BN5/PPP2PPP/R1B1K1NR b KQkq -"},{"eco":"C27","name":"Vienna Game: Frankenstein-Dracula Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f6e4","epd":"rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/R1BQK1NR w KQkq -"},{"eco":"C27","name":"Vienna Game: Stanley Variation, Alekhine Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7 6. Nf3 Nc6 7. Nxe5","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 f8e7 g1f3 b8c6 f3e5","epd":"r1bqk2r/ppppbppp/2nn4/4N2Q/8/1BN5/PPPP1PPP/R1B1K2R b KQkq -"},{"eco":"C27","name":"Vienna Game: Stanley Variation, Frankenstein-Dracula Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Nc6 6. Nb5 g6 7. Qf3 f5 8. Qd5 Qe7 9. Nxc7+ Kd8 10. Nxa8 b6","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 b8c6 c3b5 g7g6 h5f3 f7f5 f3d5 d8e7 b5c7 e8d8 c7a8 b7b6","epd":"N1bk1b1r/p2pq2p/1pnn2p1/3Qpp2/8/1B6/PPPP1PPP/R1B1K1NR w KQ -"},{"eco":"C27","name":"Vienna Game: Stanley Variation, Monster Declined","pgn":"1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 4. Qh5 Nd6 5. Bb3 Be7","uci":"e2e4 e7e5 b1c3 g8f6 f1c4 f6e4 d1h5 e4d6 c4b3 f8e7","epd":"rnbqk2r/ppppbppp/3n4/4p2Q/8/1BN5/PPPP1PPP/R1B1K1NR w KQkq -"},{"eco":"C28","name":"Bishop's Opening: Vienna Hybrid, Hromádka Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bb4 5. Ne2","uci":"e2e4 e7e5 b1c3 b8c6 f1c4 g8f6 d2d3 f8b4 g1e2","epd":"r1bqk2r/pppp1ppp/2n2n2/4p3/1bB1P3/2NP4/PPP1NPPP/R1BQK2R b KQkq -"},{"eco":"C28","name":"Vienna Game: Stanley Variation, Bronstein Gambit","pgn":"1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. f4 Nxe4 5. Nf3","uci":"e2e4 e7e5 b1c3 b8c6 f1c4 g8f6 f2f4 f6e4 g1f3","epd":"r1bqkb1r/pppp1ppp/2n5/4p3/2B1nP2/2N2N2/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"C28","name":"Vienna Game: Stanley Variation, Three Knights Variation","pgn":"1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6","uci":"e2e4 e7e5 b1c3 b8c6 f1c4 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -"},{"eco":"C29","name":"Vienna Game: Heyde Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 6. d4","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5 d2d4","epd":"rnbqkb1r/ppp3pp/8/3pPp2/3Pn3/2N2Q2/PPP3PP/R1B1KBNR b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4","uci":"e2e4 e7e5 b1c3 g8f6 f2f4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Bardeleben Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3 f7f5","epd":"rnbqkb1r/ppp3pp/8/3pPp2/4n3/2N2Q2/PPPP2PP/R1B1KBNR w KQkq f6"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Breyer Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Be7","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 f8e7","epd":"rnbqk2r/ppp1bppp/8/3pP3/4n3/2N2N2/PPPP2PP/R1BQKB1R w KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Kaufmann Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bg4 6. Qe2","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 g1f3 c8g4 d1e2","epd":"rn1qkb1r/ppp2ppp/8/3pP3/4n1b1/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Main Line","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5","epd":"rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR w KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Modern Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d2d3","epd":"rnbqkb1r/ppp2ppp/8/3pP3/4n3/2NP4/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Paulsen Attack","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d1f3","epd":"rnbqkb1r/ppp2ppp/8/3pP3/4n3/2N2Q2/PPPP2PP/R1B1KBNR b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Steinitz Variation","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. d3","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 d2d3","epd":"rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2NP4/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"C29","name":"Vienna Game: Vienna Gambit, Wurzburger Trap","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+ 6. g3 Nxg3 7. Nf3 Qh5 8. Nxd5","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 f4e5 f6e4 d2d3 d8h4 g2g3 e4g3 g1f3 h4h5 c3d5","epd":"rnb1kb1r/ppp2ppp/8/3NP2q/8/3P1Nn1/PPP4P/R1BQKB1R b KQkq -"},{"eco":"C30","name":"King's Gambit","pgn":"1. e4 e5 2. f4","uci":"e2e4 e7e5 f2f4","epd":"rnbqkbnr/pppp1ppp/8/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation","pgn":"1. e4 e5 2. f4 Bc5","uci":"e2e4 e7e5 f2f4 f8c5","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3","epd":"rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/2P2N2/PP1P2PP/RNBQKB1R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation, Euwe Attack","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. fxe5 dxe5 6. Qa4+","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 c8g4 f4e5 d6e5 d1a4","epd":"rn1qk1nr/ppp2ppp/8/2b1p3/Q3P1b1/2P2N2/PP1P2PP/RNB1KB1R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation, Rotlewi Countergambit","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. b4","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b2b4","epd":"rnbqk1nr/ppp2ppp/3p4/2b1p3/1P2PP2/5N2/P1PP2PP/RNBQKB1R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation, Rubinstein Countergambit","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5","epd":"rnbqk1nr/ppp3pp/3p4/2b1pp2/4PP2/2P2N2/PP1P2PP/RNBQKB1R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical Variation, Walthoffen Attack","pgn":"1. e4 e5 2. f4 Bc5 3. Qh5","uci":"e2e4 e7e5 f2f4 f8c5 d1h5","epd":"rnbqk1nr/pppp1ppp/8/2b1p2Q/4PP2/8/PPPP2PP/RNB1KBNR b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical, Hanham Variation","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Nc3 Nd7","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 b1c3 b8d7","epd":"r1bqk1nr/pppn1ppp/3p4/2b1p3/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical, Réti Variation","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 f5 5. fxe5 dxe5 6. d4 exd4 7. Bc4","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 c2c3 f7f5 f4e5 d6e5 d2d4 e5d4 f1c4","epd":"rnbqk1nr/ppp3pp/8/2b2p2/2BpP3/2P2N2/PP4PP/RNBQK2R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical, Soldatenkov Variation","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. fxe5","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 d7d6 f4e5","epd":"rnbqk1nr/ppp2ppp/3p4/2b1P3/4P3/5N2/PPPP2PP/RNBQKB1R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Classical, Svenonius Variation","pgn":"1. e4 e5 2. Bc4 Nc6 3. Nc3 Nf6 4. d3 Bc5 5. f4 d6 6. Nf3 Bg4 7. h3 Bxf3 8. Qxf3 exf4","uci":"e2e4 e7e5 f1c4 b8c6 b1c3 g8f6 d2d3 f8c5 f2f4 d7d6 g1f3 c8g4 h2h3 g4f3 d1f3 e5f4","epd":"r2qk2r/ppp2ppp/2np1n2/2b5/2B1Pp2/2NP1Q1P/PPP3P1/R1B1K2R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Hobbs-Zilbermints Gambit","pgn":"1. e4 e5 2. f4 Nc6 3. Nf3 g5 4. fxg5 h6","uci":"e2e4 e7e5 f2f4 b8c6 g1f3 g7g5 f4g5 h7h6","epd":"r1bqkbnr/pppp1p2/2n4p/4p1P1/4P3/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Keene Defense","pgn":"1. e4 e5 2. f4 Qh4+ 3. g3 Qe7","uci":"e2e4 e7e5 f2f4 d8h4 g2g3 h4e7","epd":"rnb1kbnr/ppppqppp/8/4p3/4PP2/6P1/PPPP3P/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Keene's Defense","pgn":"1. e4 e5 2. f4 Qh4+","uci":"e2e4 e7e5 f2f4 d8h4","epd":"rnb1kbnr/pppp1ppp/8/4p3/4PP1q/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Keene's Defense","pgn":"1. e4 e5 2. f4 Qh4+ 3. g3","uci":"e2e4 e7e5 f2f4 d8h4 g2g3","epd":"rnb1kbnr/pppp1ppp/8/4p3/4PP1q/6P1/PPPP3P/RNBQKBNR b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Mafia Defense","pgn":"1. e4 c5 2. f4 e5","uci":"e2e4 c7c5 f2f4 e7e5","epd":"rnbqkbnr/pp1p1ppp/8/2p1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Miles Defense","pgn":"1. e4 e5 2. f4 Nc6 3. Nf3 f5","uci":"e2e4 e7e5 f2f4 b8c6 g1f3 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Norwalde Variation","pgn":"1. e4 e5 2. f4 Qf6","uci":"e2e4 e7e5 f2f4 d8f6","epd":"rnb1kbnr/pppp1ppp/5q2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Norwalde Variation, Bücker Gambit","pgn":"1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. Nf3 Bb4 5. Bc4","uci":"e2e4 e7e5 f2f4 d8f6 b1c3 f6f4 g1f3 f8b4 f1c4","epd":"rnb1k1nr/pppp1ppp/8/4p3/1bB1Pq2/2N2N2/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Norwalde Variation, Schubert Variation","pgn":"1. e4 e5 2. f4 Qf6 3. Nc3 Qxf4 4. d4","uci":"e2e4 e7e5 f2f4 d8f6 b1c3 f6f4 d2d4","epd":"rnb1kbnr/pppp1ppp/8/4p3/3PPq2/2N5/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit","pgn":"1. e4 e5 2. f4 f5","uci":"e2e4 e7e5 f2f4 f7f5","epd":"rnbqkbnr/pppp2pp/8/4pp2/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit, Greco Variation","pgn":"1. e4 e5 2. f4 f5 3. exf5 Qh4+","uci":"e2e4 e7e5 f2f4 f7f5 e4f5 d8h4","epd":"rnb1kbnr/pppp2pp/8/4pP2/5P1q/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit, Pawn Sacrifice Line","pgn":"1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ g6 5. fxg6 Qe7+ 6. Kd1","uci":"e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 d1h5 g7g6 f5g6 d8e7 e1d1","epd":"rnb1kbnr/ppppq2p/6P1/7Q/5p2/8/PPPP2PP/RNBK1BNR b kq -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit, Schiller's Defense","pgn":"1. e4 e5 2. f4 f5 3. exf5 Bc5","uci":"e2e4 e7e5 f2f4 f7f5 e4f5 f8c5","epd":"rnbqk1nr/pppp2pp/8/2b1pP2/5P2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit, Shirazi Line","pgn":"1. e4 e5 2. f4 f5 3. exf5 exf4 4. Qh5+ Ke7","uci":"e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 d1h5 e8e7","epd":"rnbq1bnr/ppppk1pp/8/5P1Q/5p2/8/PPPP2PP/RNB1KBNR w KQ -"},{"eco":"C30","name":"King's Gambit Declined: Panteldakis Countergambit, Symmetrical Variation","pgn":"1. e4 e5 2. f4 f5 3. exf5 exf4 4. Nf3 d5 5. d4 Bd6 6. Bd3","uci":"e2e4 e7e5 f2f4 f7f5 e4f5 e5f4 g1f3 d7d5 d2d4 f8d6 f1d3","epd":"rnbqk1nr/ppp3pp/3b4/3p1P2/3P1p2/3B1N2/PPP3PP/RNBQK2R b KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Petrov's Defense","pgn":"1. e4 e5 2. f4 Nf6","uci":"e2e4 e7e5 f2f4 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Queen's Knight Defense","pgn":"1. e4 e5 2. f4 Nc6","uci":"e2e4 e7e5 f2f4 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Senechaud Countergambit","pgn":"1. e4 e5 2. f4 Bc5 3. Nf3 g5","uci":"e2e4 e7e5 f2f4 f8c5 g1f3 g7g5","epd":"rnbqk1nr/pppp1p1p/8/2b1p1p1/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Soller-Zilbermints Gambit","pgn":"1. e4 e5 2. f4 f6 3. fxe5 Nc6","uci":"e2e4 e7e5 f2f4 f7f6 f4e5 b8c6","epd":"r1bqkbnr/pppp2pp/2n2p2/4P3/4P3/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Zilbermints Double Countergambit","pgn":"1. e4 e5 2. f4 g5","uci":"e2e4 e7e5 f2f4 g7g5","epd":"rnbqkbnr/pppp1p1p/8/4p1p1/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C30","name":"King's Gambit Declined: Zilbermints Double Gambit","pgn":"1. e4 e5 2. f4 Nc6 3. Nf3 g5","uci":"e2e4 e7e5 f2f4 b8c6 g1f3 g7g5","epd":"r1bqkbnr/pppp1p1p/2n5/4p1p1/4PP2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit","pgn":"1. e4 e5 2. f4 d5","uci":"e2e4 e7e5 f2f4 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit Accepted","pgn":"1. e4 e5 2. f4 d5 3. exd5","uci":"e2e4 e7e5 f2f4 d7d5 e4d5","epd":"rnbqkbnr/ppp2ppp/8/3Pp3/5P2/8/PPPP2PP/RNBQKBNR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Anderssen Attack","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. Bb5+","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 f1b5","epd":"rnbqkbnr/ppp2ppp/8/1B1P4/4pP2/8/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Blackburne Attack","pgn":"1. e4 e5 2. f4 d5 3. Nf3","uci":"e2e4 e7e5 f2f4 d7d5 g1f3","epd":"rnbqkbnr/ppp2ppp/8/3pp3/4PP2/5N2/PPPP2PP/RNBQKB1R b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3","epd":"rnbqkbnr/ppp2ppp/8/3P4/4pP2/3P4/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense","pgn":"1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. exd5 e4 5. d3 Bb4 6. Bd2 e3","uci":"e2e4 e7e5 b1c3 g8f6 f2f4 d7d5 e4d5 e5e4 d2d3 f8b4 c1d2 e4e3","epd":"rnbqk2r/ppp2ppp/5n2/3P4/1b3P2/2NPp3/PPPB2PP/R2QKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Hinrichsen Gambit","pgn":"1. e4 e5 2. f4 d5 3. d4","uci":"e2e4 e7e5 f2f4 d7d5 d2d4","epd":"rnbqkbnr/ppp2ppp/8/3pp3/3PPP2/8/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Miles Gambit","pgn":"1. e4 e5 2. f4 d5 3. exd5 Bc5","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 f8c5","epd":"rnbqk1nr/ppp2ppp/8/2bPp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Milner-Barry Variation","pgn":"1. e4 e5 2. f4 d5 3. Nc3","uci":"e2e4 e7e5 f2f4 d7d5 b1c3","epd":"rnbqkbnr/ppp2ppp/8/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Modern Transfer","pgn":"1. e4 e5 2. f4 d5 3. exd5 exf4","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5f4","epd":"rnbqkbnr/ppp2ppp/8/3P4/5p2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit","pgn":"1. e4 e5 2. f4 d5 3. exd5 c6","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 c7c6","epd":"rnbqkbnr/pp3ppp/2p5/3Pp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Pickler Gambit","pgn":"1. e4 e5 2. f4 d5 3. exd5 c6 4. dxc6 Bc5","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 c7c6 d5c6 f8c5","epd":"rnbqk1nr/pp3ppp/2P5/2b1p3/5P2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Rubinstein Variation","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. Nc3 Nf6 5. Qe2","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 b1c3 g8f6 d1e2","epd":"rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq -"},{"eco":"C31","name":"King's Gambit Declined: Falkbeer Countergambit, Staunton Line","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4","epd":"rnbqkbnr/ppp2ppp/8/3P4/4pP2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C31","name":"Van Geet Opening: Grünfeld Defense, Steiner Gambit","pgn":"1. e4 e5 2. f4 d5 3. Nc3 dxe4 4. Nxe4","uci":"e2e4 e7e5 f2f4 d7d5 b1c3 d5e4 c3e4","epd":"rnbqkbnr/ppp2ppp/8/4p3/4NP2/8/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Alapin Variation","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf2+ 8. Kd1 Qxd5+ 9. Nfd2","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c5f2 e1d1 d8d5 f3d2","epd":"rnb1k2r/ppp2ppp/8/3q4/4nP2/8/PPPNQbPP/RNBK1B1R b kq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2","epd":"rnbqkb1r/ppp2ppp/8/3P4/4nP2/8/PPP1Q1PP/RNB1KBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit Accepted","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4","epd":"rnbqkb1r/ppp2ppp/5n2/3P4/4PP2/8/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Keres Variation","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Nd2","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 b1d2","epd":"rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPPN2PP/R1BQKBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Main Line","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5","epd":"rn1qk2r/ppp2ppp/8/2bP1b2/4nP2/5N2/PPP1Q1PP/RNB1KB1R w KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Old Line","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. Qe2","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d1e2","epd":"rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPP1Q1PP/RNB1KBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Charousek Variation","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Qe2 Qxd5 7. Nd2 f5 8. g4","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 d1e2 d8d5 b1d2 f7f5 g2g4","epd":"rnb1kb1r/ppp3pp/8/3q1p2/4nPP1/8/PPPNQ2P/R1B1KBNR b KQkq -"},{"eco":"C32","name":"King's Gambit Declined: Falkbeer Countergambit, Tarrasch Variation","pgn":"1. e4 e5 2. f4 d5 3. exd5 e4 4. d3 Nf6 5. dxe4 Nxe4 6. Nf3 Bc5 7. Qe2 Bf5 8. g4 O-O","uci":"e2e4 e7e5 f2f4 d7d5 e4d5 e5e4 d2d3 g8f6 d3e4 f6e4 g1f3 f8c5 d1e2 c8f5 g2g4 e8g8","epd":"rn1q1rk1/ppp2ppp/8/2bP1b2/4nPP1/5N2/PPP1Q2P/RNB1KB1R w KQ -"},{"eco":"C33","name":"King's Gambit Accepted","pgn":"1. e4 e5 2. f4 exf4","uci":"e2e4 e7e5 f2f4 e5f4","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP2PP/RNBQKBNR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Basman Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Qe2","uci":"e2e4 e7e5 f2f4 e5f4 d1e2","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPQ1PP/RNB1KBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Bc4","uci":"e2e4 e7e5 f2f4 e5f4 f1c4","epd":"rnbqkbnr/pppp1ppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Anderssen Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 g5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g7g5","epd":"rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Anderssen Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 c6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 c7c6","epd":"rnbqkbnr/pp3ppp/2p5/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Bledow Countergambit","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 g8f6","epd":"rnbqkb1r/ppp2ppp/5n2/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Bledow Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 d5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3p4/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Boden Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b8c6","epd":"r1b1kbnr/pppp1ppp/2n5/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Bogoljubow Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 c7c6","epd":"rnbqkb1r/pp1p1ppp/2p2n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Bogoljubow Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3","epd":"rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Boren-Svenonius Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Qh4+ 5. Kf1 Bd6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d7d5 c4d5 d8h4 e1f1 f8d6","epd":"rnb1k1nr/ppp2ppp/3b4/3B4/4Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Bryan Countergambit","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 b5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 b7b5","epd":"rnb1kbnr/p1pp1ppp/8/1p6/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Chigorin's Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d5 5. Bxd5 g5 6. g3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 d7d5 c4d5 g7g5 g2g3","epd":"rnb1kbnr/ppp2p1p/8/3B2p1/4Pp1q/6P1/PPPP3P/RNBQ1KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Classical Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Ne7 5. Nc3 g5 6. d4 Bg7","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g8e7 b1c3 g7g5 d2d4 f8g7","epd":"rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N5/PPP3PP/R1BQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Classical Defense, Cozio Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Qf3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 d1f3","epd":"rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/5Q2/PPPP2PP/RNB2KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Cozio Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Cozio Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 d6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 d7d6","epd":"rnb1kbnr/ppp2ppp/3p4/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, First Jaenisch Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g8f6","epd":"rnb1kb1r/pppp1ppp/5n2/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Fraser Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3 fxg3 7. Qf3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 g2g3 f4g3 d1f3","epd":"rnb1k1nr/pppp1pbp/8/6p1/2B1P2q/2N2Qp1/PPPP3P/R1B2KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Gianutio Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 f5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 f7f5","epd":"rnbqkbnr/pppp2pp/8/5p2/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Greco Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Bc5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 f8c5","epd":"rnb1k1nr/pppp1ppp/8/2b5/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Grimm Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 d6 7. e5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 d7d6 e4e5","epd":"rnb1k1nr/ppp2pbp/3p4/4P1p1/2BP1p1q/2N5/PPP3PP/R1BQ1KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Kieseritzky Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 b5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 b7b5","epd":"rnbqkbnr/p1pp1ppp/8/1p6/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Lopez Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 c6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 c7c6","epd":"rnbqkbnr/pp1p1ppp/2p5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Lopez Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5","epd":"rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Maurian Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, McDonnell Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. d4 Ne7 7. g3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 d2d4 g8e7 g2g3","epd":"rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N3P1/PPP4P/R1BQ1KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, McDonnell Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 g5 5. Nc3 Bg7 6. g3","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 d8h4 e1f1 g7g5 b1c3 f8g7 g2g3","epd":"rnb1k1nr/pppp1pbp/8/6p1/2B1Pp1q/2N3P1/PPPP3P/R1BQ1KNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Paulsen Attack","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 Bb4 5. e5","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g8f6 b1c3 f8b4 e4e5","epd":"rnbqk2r/pppp1ppp/5n2/4P3/1bB2p2/2N5/PPPP2PP/R1BQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Bishop's Gambit, Steinitz Defense","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 Ne7","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 g8e7","epd":"rnbqkb1r/ppppnppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Breyer Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Qf3","uci":"e2e4 e7e5 f2f4 e5f4 d1f3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/5Q2/PPPP2PP/RNB1KBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Carrera Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Qh5","uci":"e2e4 e7e5 f2f4 e5f4 d1h5","epd":"rnbqkbnr/pppp1ppp/8/7Q/4Pp2/8/PPPP2PP/RNB1KBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Dodo Variation","pgn":"1. e4 e5 2. f4 exf4 3. Qg4","uci":"e2e4 e7e5 f2f4 e5f4 d1g4","epd":"rnbqkbnr/pppp1ppp/8/8/4PpQ1/8/PPPP2PP/RNB1KBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Eisenberg Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nh3","uci":"e2e4 e7e5 f2f4 e5f4 g1h3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/7N/PPPP2PP/RNBQKB1R b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Gaga Gambit","pgn":"1. e4 e5 2. f4 exf4 3. g3","uci":"e2e4 e7e5 f2f4 e5f4 g2g3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/6P1/PPPP3P/RNBQKBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Lopez-Gianutio Countergambit, Hein Variation","pgn":"1. e4 e5 2. f4 exf4 3. Bc4 f5 4. Qe2 Qh4+ 5. Kd1 fxe4 6. Nc3 Kd8","uci":"e2e4 e7e5 f2f4 e5f4 f1c4 f7f5 d1e2 d8h4 e1d1 f5e4 b1c3 e8d8","epd":"rnbk1bnr/pppp2pp/8/8/2B1pp1q/2N5/PPPPQ1PP/R1BK2NR w - -"},{"eco":"C33","name":"King's Gambit Accepted: Mason-Keres Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 b1c3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Orsini Gambit","pgn":"1. e4 e5 2. f4 exf4 3. b3","uci":"e2e4 e7e5 f2f4 e5f4 b2b3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/1P6/P1PP2PP/RNBQKBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Paris Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Ne2","uci":"e2e4 e7e5 f2f4 e5f4 g1e2","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPN1PP/RNBQKB1R b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Schurig Gambit, with Bb5","pgn":"1. e4 e5 2. f4 exf4 3. Bb5","uci":"e2e4 e7e5 f2f4 e5f4 f1b5","epd":"rnbqkbnr/pppp1ppp/8/1B6/4Pp2/8/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Schurig Gambit, with Bd3","pgn":"1. e4 e5 2. f4 exf4 3. Bd3","uci":"e2e4 e7e5 f2f4 e5f4 f1d3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/3B4/PPPP2PP/RNBQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Stamma Gambit","pgn":"1. e4 e5 2. f4 exf4 3. h4","uci":"e2e4 e7e5 f2f4 e5f4 h2h4","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp1P/8/PPPP2P1/RNBQKBNR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Tartakower Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Be2","uci":"e2e4 e7e5 f2f4 e5f4 f1e2","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPB1PP/RNBQK1NR b KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Tartakower Gambit, Weiss Defense","pgn":"1. e4 e5 2. f4 exf4 3. Be2 f5 4. exf5 d6","uci":"e2e4 e7e5 f2f4 e5f4 f1e2 f7f5 e4f5 d7d6","epd":"rnbqkbnr/ppp3pp/3p4/5P2/5p2/8/PPPPB1PP/RNBQK1NR w KQkq -"},{"eco":"C33","name":"King's Gambit Accepted: Tumbleweed","pgn":"1. e4 e5 2. f4 exf4 3. Kf2","uci":"e2e4 e7e5 f2f4 e5f4 e1f2","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP1KPP/RNBQ1BNR b kq -"},{"eco":"C33","name":"King's Gambit Accepted: Villemson Gambit","pgn":"1. e4 e5 2. f4 exf4 3. d4","uci":"e2e4 e7e5 f2f4 e5f4 d2d4","epd":"rnbqkbnr/pppp1ppp/8/8/3PPp2/8/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Becker Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 h6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 h7h6","epd":"rnbqkbnr/pppp1pp1/7p/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Bonsch-Osmolovsky Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Ne7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g8e7","epd":"rnbqkb1r/ppppnppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Fischer Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d6","epd":"rnbqkbnr/ppp2ppp/3p4/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Fischer Defense, Schulder Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d6 4. b4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 b2b4","epd":"rnbqkbnr/ppp2ppp/3p4/8/1P2Pp2/5N2/P1PP2PP/RNBQKB1R b KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Fischer Defense, Spanish Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d6 4. d4 Nf6 5. Bd3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 d2d4 g8f6 f1d3","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/3PPp2/3B1N2/PPP3PP/RNBQK2R b KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Gianutio Countergambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 f5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 f7f5","epd":"rnbqkbnr/pppp2pp/8/5p2/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Greco Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d6 4. Bc4 h6 5. d4 g5 6. h4 Bg7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d6 f1c4 h7h6 d2d4 g7g5 h2h4 f8g7","epd":"rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/5N2/PPP3P1/RNBQK2R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: King's Knight's Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5","epd":"rnbqkbnr/pppp1p1p/8/6p1/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: King's Knight's Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3","epd":"rnbqkbnr/pppp1ppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R b KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: MacLeod Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Schallopp Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C34","name":"King's Gambit Accepted: Schallopp Defense, Tashkent Attack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Nf6 4. e5 Nh5 5. g4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g8f6 e4e5 f6h5 g2g4","epd":"rnbqkb1r/pppp1ppp/8/4P2n/5pP1/5N2/PPPP3P/RNBQKB1R b KQkq g3"},{"eco":"C34","name":"King's Gambit Accepted: Wagenbach Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 h5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 h7h5","epd":"rnbqkbnr/pppp1pp1/8/7p/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C35","name":"King's Gambit Accepted: Cunningham Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Be7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 f8e7","epd":"rnbqk1nr/ppppbppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C35","name":"King's Gambit Accepted: Cunningham Defense, Bertin Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3","epd":"rnbqk1nr/pppp1ppp/8/8/2B1Pp1b/5NP1/PPPP3P/RNBQK2R b KQkq -"},{"eco":"C35","name":"King's Gambit Accepted: Cunningham Defense, Bertin Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Bh4+ 5. g3 fxg3 6. O-O gxh2+ 7. Kh1","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 e7h4 g2g3 f4g3 e1g1 g3h2 g1h1","epd":"rnbqk1nr/pppp1ppp/8/8/2B1P2b/5N2/PPPP3p/RNBQ1R1K b kq -"},{"eco":"C35","name":"King's Gambit Accepted: Cunningham Defense, McCormick Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Be7 4. Bc4 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 f8e7 f1c4 g8f6","epd":"rnbqk2r/ppppbppp/5n2/8/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -"},{"eco":"C36","name":"King's Gambit Accepted: Abbazia Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6","epd":"rnbqkb1r/ppp2ppp/5n2/3P4/5p2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C36","name":"King's Gambit Accepted: Abbazia Defense, Main Line","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 5. Bb5+ c6 6. dxc6 bxc6 7. Bc4 Nd5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5 g8f6 f1b5 c7c6 d5c6 b7c6 b5c4 f6d5","epd":"rnbqkb1r/p4ppp/2p5/3n4/2B2p2/5N2/PPPP2PP/RNBQK2R w KQkq -"},{"eco":"C36","name":"King's Gambit Accepted: Modern Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3p4/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -"},{"eco":"C36","name":"King's Gambit Accepted: Modern Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 d7d5 e4d5","epd":"rnbqkbnr/ppp2ppp/8/3P4/5p2/5N2/PPPP2PP/RNBQKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Australian Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. h4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 h2h4","epd":"rnbqkbnr/pppp1p1p/8/8/2B1PppP/5N2/PPPP2P1/RNBQK2R b KQkq h3"},{"eco":"C37","name":"King's Gambit Accepted: Blachly Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Bc4 g5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 b8c6 f1c4 g7g5","epd":"r1bqkbnr/pppp1p1p/2n5/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Double Muzio Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. Bxf7+","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 c4f7","epd":"rnb1kbnr/pppp1B1p/8/4q3/5p2/5Q2/PPPP2PP/RNB2RK1 b kq -"},{"eco":"C37","name":"King's Gambit Accepted: Double Muzio Gambit, Baldwin Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Nc3 Qd4+ 8. Kh1 Qxc4 9. Nd5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 b1c3 f6d4 g1h1 d4c4 c3d5","epd":"rnb1kbnr/pppp1p1p/8/3N4/2q1Pp2/5Q2/PPPP2PP/R1B2R1K b kq -"},{"eco":"C37","name":"King's Gambit Accepted: Double Muzio Gambit, Bello Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 b1c3","epd":"rnb1kbnr/pppp1p1p/5q2/8/2B1Pp2/2N2Q2/PPPP2PP/R1B2RK1 b kq -"},{"eco":"C37","name":"King's Gambit Accepted: Double Muzio Gambit, Paulsen Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. e5 Qxe5 8. d3 Bh6 9. Nc3 Ne7 10. Bd2 Nbc6 11. Rae1","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 e4e5 f6e5 d2d3 f8h6 b1c3 g8e7 c1d2 b8c6 a1e1","epd":"r1b1k2r/ppppnp1p/2n4b/4q3/2B2p2/2NP1Q2/PPPB2PP/4RRK1 b kq -"},{"eco":"C37","name":"King's Gambit Accepted: Double Muzio Gambit, Young Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6 7. Bxf7+ Kxf7 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3 fxe3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6 c4f7 e8f7 d2d4 f6d4 c1e3 d4f6 b1c3 f4e3","epd":"rnb2bnr/pppp1k1p/5q2/8/4P3/2N1pQ2/PPP3PP/R4RK1 w - -"},{"eco":"C37","name":"King's Gambit Accepted: Ghulam-Kassim Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4","epd":"rnbqkbnr/pppp1p1p/8/8/2BPPpp1/5N2/PPP3PP/RNBQK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Ghulam-Kassim Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 gxf3 6. Qxf3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4 g4f3 d1f3","epd":"rnbqkbnr/pppp1p1p/8/8/2BPPp2/5Q2/PPP3PP/RNB1K2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: King's Knight's Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4","epd":"rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Kotov Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. d4 gxf3 6. Bxf4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 d2d4 g4f3 c1f4","epd":"rnbqkbnr/pppp1p1p/8/8/2BPPB2/5p2/PPP3PP/RN1QK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Lolli Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7","epd":"rnbqkbnr/pppp1B1p/8/8/4Ppp1/5N2/PPPP2PP/RNBQK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Lolli Gambit, Young Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Bxf7+ Kxf7 6. O-O gxf3 7. Qxf3 Qf6 8. d4 Qxd4+ 9. Be3 Qf6 10. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 c4f7 e8f7 e1g1 g4f3 d1f3 d8f6 d2d4 f6d4 c1e3 d4f6 b1c3","epd":"rnb2bnr/pppp1k1p/5q2/8/4Pp2/2N1BQ2/PPP3PP/R4RK1 b - -"},{"eco":"C37","name":"King's Gambit Accepted: McDonnell Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 b1c3","epd":"rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Middleton Countergambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 d6 5. O-O Bg4 6. h3 h5 7. hxg4 hxg4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 d7d6 e1g1 c8g4 h2h3 h7h5 h3g4 h5g4","epd":"rn1qkbnr/ppp2p2/3p4/6p1/2B1Ppp1/5N2/PPPP2P1/RNBQ1RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit Accepted, From's Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qe7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8e7","epd":"rnb1kbnr/ppppqp1p/8/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit, Brentano Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O d5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d7d5","epd":"rnbqkbnr/ppp2p1p/8/3p4/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit, Holloway Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 b8c6","epd":"r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit, Kling and Horwitz Counterattack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O Qe7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 d8e7","epd":"rnb1kbnr/ppppqp1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit, Sarratt Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O gxf3 6. Qxf3 Qf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1 g4f3 d1f3 d8f6","epd":"rnb1kbnr/pppp1p1p/5q2/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Muzio Gambit, Wild Muzio Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. O-O","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 e1g1","epd":"rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 b kq -"},{"eco":"C37","name":"King's Gambit Accepted: Quaade Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 b1c3","epd":"rnbqkbnr/pppp1p1p/8/6p1/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Rosentreter Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4","epd":"rnbqkbnr/pppp1p1p/8/6p1/3PPp2/5N2/PPP3PP/RNBQKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Rosentreter Gambit, Bird Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5 Qh4+ 6. g3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f3e5 d8h4 g2g3","epd":"rnb1kbnr/pppp1p1p/8/4N3/3PPppq/6P1/PPP4P/RNBQKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Rosentreter Gambit, Sörensen Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 b1c3","epd":"rnbqkbnr/pppp1p1p/8/8/3PPpp1/2N2N2/PPP3PP/R1BQKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Rosentreter Gambit, Testa Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Bxf4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 c1f4","epd":"rnbqkbnr/pppp1p1p/8/8/3PPBp1/5N2/PPP3PP/RN1QKB1R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5","epd":"rnbqkbnr/pppp1p1p/8/4N3/2B1Ppp1/8/PPPP2PP/RNBQK2R b KQkq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit, Anderssen Counterattack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 d6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 d7d6","epd":"rnb1kb1r/ppp2p1p/3p3n/4N3/2BPPppq/8/PPP3PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit, Cochrane Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 f3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 f4f3","epd":"rnb1kbnr/pppp1p1p/8/4N3/2B1P1pq/5p2/PPPP2PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit, Santa Maria Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8f6","epd":"rnb1kb1r/pppp1p1p/5n2/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit, Silberschmidt Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6","epd":"rnb1kb1r/pppp1p1p/7n/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Salvio Gambit, Viennese Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 b8c6","epd":"r1b1kbnr/pppp1p1p/2n5/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Silberschmidt Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 g4 5. Ne5 Qh4+ 6. Kf1 Nh6 7. d4 f3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 g5g4 f3e5 d8h4 e1f1 g8h6 d2d4 f4f3","epd":"rnb1kb1r/pppp1p1p/7n/4N3/2BPP1pq/5p2/PPP3PP/RNBQ1K1R w kq -"},{"eco":"C37","name":"King's Gambit Accepted: Sörensen Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. d4 g4 5. Ne5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 d2d4 g5g4 f3e5","epd":"rnbqkbnr/pppp1p1p/8/4N3/3PPpp1/8/PPP3PP/RNBQKB1R b KQkq -"},{"eco":"C38","name":"King's Gambit Accepted: Greco Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4 h6 6. d4 d6 7. Nc3 c6 8. hxg5 hxg5 9. Rxh8 Bxh8 10. Ne5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4 h7h6 d2d4 d7d6 b1c3 c7c6 h4g5 h6g5 h1h8 g7h8 f3e5","epd":"rnbqk1nb/pp3p2/2pp4/4N1p1/2BPPp2/2N5/PPP3P1/R1BQK3 b Qq -"},{"eco":"C38","name":"King's Gambit Accepted: Hanstein Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. O-O","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 e1g1","epd":"rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQ1RK1 b kq -"},{"eco":"C38","name":"King's Gambit Accepted: Mayet Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. d4 d6 6. c3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 d2d4 d7d6 c2c3","epd":"rnbqk1nr/ppp2pbp/3p4/6p1/2BPPp2/2P2N2/PP4PP/RNBQK2R b KQkq -"},{"eco":"C38","name":"King's Gambit Accepted: Philidor Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7 5. h4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7 h2h4","epd":"rnbqk1nr/pppp1pbp/8/6p1/2B1Pp1P/5N2/PPPP2P1/RNBQK2R b KQkq -"},{"eco":"C38","name":"King's Gambit Accepted: Philidor Gambit, Schultz Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 h6 4. Bc4 d6 5. d4 g5 6. h4 Bg7 7. Qd3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 h7h6 f1c4 d7d6 d2d4 g7g5 h2h4 f8g7 d1d3","epd":"rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/3Q1N2/PPP3P1/RNB1K2R b KQkq -"},{"eco":"C38","name":"King's Gambit Accepted: Traditional Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 Bg7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 f1c4 f8g7","epd":"rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5","epd":"rnbqkbnr/pppp1p1p/8/6N1/4PppP/8/PPPP2P1/RNBQKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier Gambit, Thorold Attack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4","epd":"rnbq1bnr/pppp1k2/7p/8/3PPppP/8/PPP3P1/RNBQKB1R b KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier Gambit, Urusov Attack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4","epd":"rnbq1bnr/pppp1k2/7p/8/2B1PppP/8/PPPP2P1/RNBQK2R b KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier, Blackburne Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 b1c3","epd":"rnbq1bnr/pppp1k2/7p/8/4PppP/2N5/PPPP2P1/R1BQKB1R b KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier, Cook Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. d4 d5 8. Bxf4 dxe4 9. Bc4+ Kg7 10. Be5+","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d2d4 d7d5 c1f4 d5e4 f1c4 f7g7 f4e5","epd":"rnbq1bnr/ppp3k1/7p/4B3/2BPp1pP/8/PPP3P1/RN1QK2R b KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier, Horny Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Qxg4 Nf6 8. Qxf4 Bd6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 d1g4 g8f6 g4f4 f8d6","epd":"rnbq3r/pppp1k2/3b1n1p/8/4PQ1P/8/PPPP2P1/RNB1KB1R w KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier, Schlechter Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 g8f6","epd":"rnbqkb1r/pppp1p1p/5n2/6N1/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Allgaier, Urusov Attack","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7 Kxf7 7. Bc4+ d5 8. Bxd5+ Kg7 9. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7 e8f7 f1c4 d7d5 c4d5 f7g7 d2d4","epd":"rnbq1bnr/ppp3k1/7p/3B4/3PPppP/8/PPP3P1/RNBQK2R b KQ -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5","epd":"rnbqkbnr/pppp1p1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Anderssen Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6","epd":"rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQK2R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Anderssen-Cordel Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. d4 Nh5 9. Bxf4 Nxf4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 d2d4 f6h5 c1f4 h5f4","epd":"rnbqk2r/ppp2p1p/3b4/3PN3/2BP1npP/8/PPP3P1/RN1QK2R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6","epd":"rnbqkb1r/pppp1p1p/5n2/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense, Rubinstein Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. d4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 d2d4","epd":"rnbqkb1r/pppp1p1p/5n2/4N3/3PPppP/8/PPP3P1/RNBQKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense, de Riviere Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Nxg4 d5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 e5g4 d7d5","epd":"rnbqkb1r/ppp2p1p/5n2/3p4/4PpNP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5","epd":"rnbqkbnr/ppp2p1p/8/3pN3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4","epd":"rnbqkb1r/ppp2p1p/5n2/3pN3/3PPBpP/8/PPP3P1/RN1QKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense, Caro Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d5 6. d4 Nf6 7. Bxf4 Nxe4 8. Nd2","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d5 d2d4 g8f6 c1f4 f6e4 b1d2","epd":"rnbqkb1r/ppp2p1p/8/3pN3/3PnBpP/8/PPPN2P1/R2QKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Cotter Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 h6 6. Nxf7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3g5 h7h6 g5f7","epd":"rnbqkbnr/pppp1N2/7p/8/4PppP/8/PPPP2P1/RNBQKB1R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Kolisch Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 d6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d7d6","epd":"rnbqkbnr/ppp2p1p/3p4/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Long Whip","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5","epd":"rnbqkbnr/pppp1p2/8/4N2p/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Neumann Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nc6","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 b8c6","epd":"r1bqkbnr/pppp1p1p/2n5/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Paulsen Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Bg7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8g7","epd":"rnbqk1nr/pppp1pbp/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Paulsen Defense Deferred","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bg7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8g7","epd":"rnbqk2r/ppp2pbp/5n2/3PN3/2B2ppP/8/PPPP2P1/RNBQK2R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Rice Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O Bxe5","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 e1g1 d6e5","epd":"rnbqk2r/ppp2p1p/5n2/3Pb3/2B2ppP/8/PPPP2P1/RNBQ1RK1 w kq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky Gambit, Rosenthal Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7","epd":"rnb1kbnr/ppppqp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky, Long Whip Defense, Jaenisch Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 h5 6. Bc4 Rh7 7. d4 Bh6 8. Nc3","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 h7h5 f1c4 h8h7 d2d4 f8h6 b1c3","epd":"rnbqk1n1/pppp1p1r/7b/4N2p/2BPPppP/2N5/PPP3P1/R1BQK2R b KQq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky, Polerio Defense","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Be7","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 f8e7","epd":"rnbqk1nr/ppppbp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky, Rice Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Nf6 6. Bc4 d5 7. exd5 Bd6 8. O-O","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 g8f6 f1c4 d7d5 e4d5 f8d6 e1g1","epd":"rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQ1RK1 b kq -"},{"eco":"C39","name":"King's Gambit Accepted: Kieseritzky, Salvio Defense, Cozio Variation","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 Qe7 6. d4 f5 7. Bc4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4 g5g4 f3e5 d8e7 d2d4 f7f5 f1c4","epd":"rnb1kbnr/ppppq2p/8/4Np2/2BPPppP/8/PPP3P1/RNBQK2R b KQkq -"},{"eco":"C39","name":"King's Gambit Accepted: King's Knight's Gambit","pgn":"1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4","uci":"e2e4 e7e5 f2f4 e5f4 g1f3 g7g5 h2h4","epd":"rnbqkbnr/pppp1p1p/8/6p1/4Pp1P/5N2/PPPP2P1/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Elephant Gambit","pgn":"1. e4 e5 2. Nf3 d5","uci":"e2e4 e7e5 g1f3 d7d5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Elephant Gambit: Maróczy Gambit","pgn":"1. e4 e5 2. Nf3 d5 3. exd5 Bd6","uci":"e2e4 e7e5 g1f3 d7d5 e4d5 f8d6","epd":"rnbqk1nr/ppp2ppp/3b4/3Pp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Elephant Gambit: Paulsen Countergambit","pgn":"1. e4 e5 2. Nf3 d5 3. exd5 e4","uci":"e2e4 e7e5 g1f3 d7d5 e4d5 e5e4","epd":"rnbqkbnr/ppp2ppp/8/3P4/4p3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Elephant Gambit: Wasp Variation","pgn":"1. e4 e5 2. Nf3 d5 3. Nxe5 dxe4 4. Bc4 Qg5","uci":"e2e4 e7e5 g1f3 d7d5 f3e5 d5e4 f1c4 d8g5","epd":"rnb1kbnr/ppp2ppp/8/4N1q1/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Gunderam Defense","pgn":"1. e4 e5 2. Nf3 Qe7","uci":"e2e4 e7e5 g1f3 d8e7","epd":"rnb1kbnr/ppppqppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Knight Opening","pgn":"1. e4 e5 2. Nf3","uci":"e2e4 e7e5 g1f3","epd":"rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"King's Pawn Game: Busch-Gass Gambit","pgn":"1. e4 e5 2. Nf3 Bc5","uci":"e2e4 e7e5 g1f3 f8c5","epd":"rnbqk1nr/pppp1ppp/8/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: Busch-Gass Gambit, Chiodini Gambit","pgn":"1. e4 e5 2. Nf3 Bc5 3. Nxe5 Nc6","uci":"e2e4 e7e5 g1f3 f8c5 f3e5 b8c6","epd":"r1bqk1nr/pppp1ppp/2n5/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: Damiano Defense","pgn":"1. e4 e5 2. Nf3 f6","uci":"e2e4 e7e5 g1f3 f7f6","epd":"rnbqkbnr/pppp2pp/5p2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: Damiano Defense, Damiano Gambit","pgn":"1. e4 e5 2. Nf3 f6 3. Nxe5 fxe5 4. Qh5+ g6 5. Qxe5+ Qe7 6. Qxh8","uci":"e2e4 e7e5 g1f3 f7f6 f3e5 f6e5 d1h5 g7g6 h5e5 d8e7 e5h8","epd":"rnb1kbnQ/ppppq2p/6p1/8/4P3/8/PPPP1PPP/RNB1KB1R b KQq -"},{"eco":"C40","name":"King's Pawn Game: Damiano Defense, Damiano Gambit, Chigorin Gambit","pgn":"1. e4 e5 2. Nf3 f6 3. Nxe5 Qe7 4. Nf3 d5","uci":"e2e4 e7e5 g1f3 f7f6 f3e5 d8e7 e5f3 d7d5","epd":"rnb1kbnr/ppp1q1pp/5p2/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: Gunderam Defense, Gunderam Gambit","pgn":"1. e4 e5 2. Nf3 Qe7 3. Bc4 f5","uci":"e2e4 e7e5 g1f3 d8e7 f1c4 f7f5","epd":"rnb1kbnr/ppppq1pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: Gunderam Gambit","pgn":"1. e4 e5 2. Nf3 c6","uci":"e2e4 e7e5 g1f3 c7c6","epd":"rnbqkbnr/pp1p1ppp/2p5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"King's Pawn Game: La Bourdonnais Gambit","pgn":"1. e4 e5 2. Nf3 Qf6 3. Bc4 Qg6 4. O-O","uci":"e2e4 e7e5 g1f3 d8f6 f1c4 f6g6 e1g1","epd":"rnb1kbnr/pppp1ppp/6q1/4p3/2B1P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C40","name":"King's Pawn Game: McConnell Defense","pgn":"1. e4 e5 2. Nf3 Qf6","uci":"e2e4 e7e5 g1f3 d8f6","epd":"rnb1kbnr/pppp1ppp/5q2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Latvian Gambit","pgn":"1. e4 e5 2. Nf3 f5","uci":"e2e4 e7e5 g1f3 f7f5","epd":"rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted","pgn":"1. e4 e5 2. Nf3 f5 3. exf5","uci":"e2e4 e7e5 g1f3 f7f5 e4f5","epd":"rnbqkbnr/pppp2pp/8/4pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Bilguer Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4","epd":"rnb1kbnr/ppp3pp/3p1q2/5p2/2NPP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Bronstein Attack","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Be2","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 f1e2","epd":"rnb1kbnr/ppp3pp/3p1q2/8/2NPp3/8/PPP1BPPP/RNBQK2R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Bronstein Gambit","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Qh5+ g6 7. Qe2","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 d1h5 g7g6 h5e2","epd":"rnb1kbnr/ppp4p/3p1qp1/8/2NPp3/8/PPP1QPPP/RNB1KB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Foltys Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. d3","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4 f5e4 d2d3","epd":"rnb1kbnr/pppp2pp/5q2/8/2N1p3/3P4/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Foltys-Leonhardt Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4","epd":"rnb1kbnr/pppp2pp/5q2/5p2/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Leonhardt Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 e5c4 f5e4 b1c3","epd":"rnb1kbnr/pppp2pp/5q2/8/2N1p3/2N5/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Main Line","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4","epd":"rnb1kbnr/pppp2pp/5q2/4Np2/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit Accepted: Nimzowitsch Attack","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. d4 d6 5. Nc4 fxe4 6. Ne3","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8f6 d2d4 d7d6 e5c4 f5e4 c4e3","epd":"rnb1kbnr/ppp3pp/3p1q2/8/3Pp3/4N3/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Behting Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. Nf7 Qxg2 6. Rf1 d5 7. Nxh8 Nf6","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d8g5 e5f7 g5g2 h1f1 d7d5 f7h8 g8f6","epd":"rnb1kb1N/ppp3pp/5n2/3p4/2B1p3/8/PPPP1PqP/RNBQKR2 w Qq -"},{"eco":"C40","name":"Latvian Gambit: Corkscrew Countergambit","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Nf6","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 g8f6","epd":"rnbqkb1r/pppp2pp/5n2/4N3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Corkscrew Gambit","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Nf6 4. Bc4 fxe4 5. Nf7 Qe7 6. Nxh8 d5","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 g8f6 f1c4 f5e4 e5f7 d8e7 f7h8 d7d5","epd":"rnb1kb1N/ppp1q1pp/5n2/3p4/2B1p3/8/PPPP1PPP/RNBQK2R w KQq -"},{"eco":"C40","name":"Latvian Gambit: Diepstraten Countergambit","pgn":"1. e4 e5 2. Nf3 f5 3. c4","uci":"e2e4 e7e5 g1f3 f7f5 c2c4","epd":"rnbqkbnr/pppp2pp/8/4pp2/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Fraser Defense","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Nc6","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 b8c6","epd":"r1bqkbnr/pppp2pp/2n5/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Greco Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nxe5 Qe7","uci":"e2e4 e7e5 g1f3 f7f5 f3e5 d8e7","epd":"rnb1kbnr/ppppq1pp/8/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Lobster Gambit","pgn":"1. e4 e5 2. Nf3 f5 3. g4","uci":"e2e4 e7e5 g1f3 f7f5 g2g4","epd":"rnbqkbnr/pppp2pp/8/4pp2/4P1P1/5N2/PPPP1P1P/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mason Countergambit","pgn":"1. e4 e5 2. Nf3 f5 3. d4","uci":"e2e4 e7e5 g1f3 f7f5 d2d4","epd":"rnbqkbnr/pppp2pp/8/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mayet Attack","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4","uci":"e2e4 e7e5 g1f3 f7f5 f1c4","epd":"rnbqkbnr/pppp2pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mayet Attack, Morgado Defense","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 Nf6","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 g8f6","epd":"rnbqkb1r/pppp2pp/5n2/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mayet Attack, Poisoned Pawn Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 Qg5 5. d4 Qxg2","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d8g5 d2d4 g5g2","epd":"rnb1kbnr/pppp2pp/8/4N3/2BPp3/8/PPP2PqP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 fxe4 4. Nxe5 d5","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 f5e4 f3e5 d7d5","epd":"rnbqkbnr/ppp3pp/8/3pN3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mayet Attack, Strautins Gambit","pgn":"1. e4 e5 2. Nf3 f5 3. Bc4 b5","uci":"e2e4 e7e5 g1f3 f7f5 f1c4 b7b5","epd":"rnbqkbnr/p1pp2pp/8/1p2pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C40","name":"Latvian Gambit: Mlotkowski Variation","pgn":"1. e4 e5 2. Nf3 f5 3. Nc3","uci":"e2e4 e7e5 g1f3 f7f5 b1c3","epd":"rnbqkbnr/pppp2pp/8/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C40","name":"Latvian Gambit: Senechaud Gambit","pgn":"1. e4 e5 2. Nf3 f5 3. b4","uci":"e2e4 e7e5 g1f3 f7f5 b2b4","epd":"rnbqkbnr/pppp2pp/8/4pp2/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense","pgn":"1. e4 e5 2. Nf3 d6","uci":"e2e4 e7e5 g1f3 d7d6","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense","pgn":"1. e4 e5 2. Nf3 d6 3. d4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense","pgn":"1. e4 e5 2. Nf3 d6 3. Bc4","uci":"e2e4 e7e5 g1f3 d7d6 f1c4","epd":"rnbqkbnr/ppp2ppp/3p4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense","pgn":"1. e4 e5 2. Nf3 d6 3. Bc4 Be7","uci":"e2e4 e7e5 g1f3 d7d6 f1c4 f8e7","epd":"rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Albin-Blackburne Gambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. dxe5 Nd7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 c8g4 d4e5 b8d7","epd":"r2qkbnr/pppn1ppp/3p4/4P3/4P1b1/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Berger Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 O-O 7. O-O c5 8. Nf3 Nc6 9. Bg5 Be6 10. Re1","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g8f6 b1c3 f8e7 f1e2 e8g8 e1g1 c7c5 d4f3 b8c6 c1g5 c8e6 f1e1","epd":"r2q1rk1/pp2bppp/2npbn2/2p3B1/4P3/2N2N2/PPP1BPPP/R2QR1K1 b - -"},{"eco":"C41","name":"Philidor Defense: Bird Gambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. c3","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 c2c3","epd":"rnbqkbnr/ppp2ppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Boden Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 Bd7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 d1d4 c8d7","epd":"rn1qkbnr/pppb1ppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Exchange Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4","epd":"rnbqkbnr/ppp2ppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Exchange Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4","epd":"rnbqkbnr/ppp2ppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Exchange Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g8f6","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7","epd":"r1bqkbnr/pppn1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation, Delmar Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. c3","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 c2c3","epd":"r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation, Krause Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1","epd":"r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation, Schlechter Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Nc3","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 b1c3","epd":"r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation, Sharp Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 Nb6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 d7b6","epd":"r1bqkbnr/ppp2ppp/1n1p4/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Hanham Variation, Steiner Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. O-O Be7 6. dxe5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 e1g1 f8e7 d4e5","epd":"r1bqk1nr/pp1nbppp/2pp4/4P3/2B1P3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C41","name":"Philidor Defense: Hanham, Kmoch Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Bc4 c6 5. Ng5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 f1c4 c7c6 f3g5","epd":"r1bqkbnr/pp1n1ppp/2pp4/4p1N1/2BPP3/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Larsen Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 g6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 g7g6","epd":"rnbqkbnr/ppp2p1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7","epd":"r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Bishop Sacrifice","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Bxf7+","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 c4f7","epd":"r1bqk2r/pppnbBpp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Delayed Bishop Sacrifice","pgn":"1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. dxe5 dxe5 7. Bxf7+","uci":"e2e4 d7d6 d2d4 g8f6 b1c3 b8d7 g1f3 e7e5 f1c4 f8e7 d4e5 d6e5 c4f7","epd":"r1bqk2r/pppnbBpp/5n2/4p3/4P3/2N2N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Forcing Line","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+ Rxf7 8. Ne6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 f3g5 e8g8 c4f7 f8f7 g5e6","epd":"r1bq2k1/pppnbrpp/3pNn2/4p3/3PP3/2N5/PPP2PPP/R1BQK2R b KQ -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Lion's Claw, with Bc4 and h6","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. O-O h6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 e1g1 h7h6","epd":"r1bqk2r/pppnbpp1/3p1n1p/4p3/2BPP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Lion's Claw, with Be2 and c6","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Be2 Be7 6. O-O c6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1e2 f8e7 e1g1 c7c6","epd":"r1bqk2r/pp1nbppp/2pp1n2/4p3/3PP3/2N2N2/PPP1BPPP/R1BQ1RK1 w kq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Shirov Gambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nd7 4. Nc3 Ngf6 5. g4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 b8d7 b1c3 g8f6 g2g4","epd":"r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP1P1/2N2N2/PPP2P1P/R1BQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Lion Variation, Sozin Variation","pgn":"1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. O-O O-O 7. Qe2 c6 8. a4 exd4","uci":"e2e4 d7d6 d2d4 g8f6 b1c3 e7e5 g1f3 b8d7 f1c4 f8e7 e1g1 e8g8 d1e2 c7c6 a2a4 e5d4","epd":"r1bq1rk1/pp1nbppp/2pp1n2/8/P1BpP3/2N2N2/1PP1QPPP/R1B2RK1 w - -"},{"eco":"C41","name":"Philidor Defense: Lopez Countergambit","pgn":"1. e4 e5 2. Nf3 d6 3. Bc4 f5","uci":"e2e4 e7e5 g1f3 d7d6 f1c4 f7f5","epd":"rnbqkbnr/ppp3pp/3p4/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Lopez Countergambit, Jaenisch Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 f5 4. Bc4 exd4 5. Ng5 Nh6 6. Nxh7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 f1c4 e5d4 f3g5 g8h6 g5h7","epd":"rnbqkb1r/ppp3pN/3p3n/5p2/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Morphy Gambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Bc4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f1c4","epd":"rnbqkbnr/ppp2ppp/3p4/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6","epd":"rnbqkb1r/ppp2ppp/3p1n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5","epd":"rnbqkb1r/ppp2ppp/3p1n2/4P3/4P3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch Variation, Klein Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Bc4","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f1c4","epd":"rnbqkb1r/ppp2ppp/3p1n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch Variation, Rellstab Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Qd5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 d1d5","epd":"rnbqkb1r/ppp2ppp/3p4/3QP3/4n3/5N2/PPP2PPP/RNB1KB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch Variation, Sokolsky Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. dxe5 Nxe4 5. Nbd2","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 d4e5 f6e4 b1d2","epd":"rnbqkb1r/ppp2ppp/3p4/4P3/4n3/5N2/PPPN1PPP/R1BQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch, Larobok Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. Ng5 O-O 7. Bxf7+","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 b1c3 b8d7 f1c4 f8e7 f3g5 e8g8 c4f7","epd":"r1bq1rk1/pppnbBpp/3p1n2/4p1N1/3PP3/2N5/PPP2PPP/R1BQK2R b KQ -"},{"eco":"C41","name":"Philidor Defense: Nimzowitsch, Locock Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Ng5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 g8f6 f3g5","epd":"rnbqkb1r/ppp2ppp/3p1n2/4p1N1/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Paulsen Attack","pgn":"1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 d5 5. exd5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 e5d4 f3d4 d6d5 e4d5","epd":"rnbqkbnr/ppp2ppp/8/3P4/3N4/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Philidor Countergambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 f5","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 f7f5","epd":"rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Philidor Countergambit, Berger Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6 Bc5 7. Nc3","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6 f8c5 b1c3","epd":"rnbqk1nr/ppp3pp/4P3/2bp2N1/4p3/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Philidor Countergambit, Zukertort Variation","pgn":"1. e4 e5 2. Nf3 d6 3. d4 f5 4. Nc3","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 b1c3","epd":"rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Philidor Countergambit, del Rio Attack","pgn":"1. e4 e5 2. Nf3 d6 3. d4 f5 4. dxe5 fxe4 5. Ng5 d5 6. e6","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 f7f5 d4e5 f5e4 f3g5 d6d5 e5e6","epd":"rnbqkbnr/ppp3pp/4P3/3p2N1/4p3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C41","name":"Philidor Defense: Philidor Gambit","pgn":"1. e4 e5 2. Nf3 d6 3. d4 Bd7","uci":"e2e4 e7e5 g1f3 d7d6 d2d4 c8d7","epd":"rn1qkbnr/pppb1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C41","name":"Philidor Defense: Steinitz Variation","pgn":"1. e4 e5 2. Nf3 d6 3. Bc4 Be7 4. c3","uci":"e2e4 e7e5 g1f3 d7d6 f1c4 f8e7 c2c3","epd":"rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C42","name":"Petrov's Defense","pgn":"1. e4 e5 2. Nf3 Nf6","uci":"e2e4 e7e5 g1f3 g8f6","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5","uci":"e2e4 e7e5 g1f3 g8f6 f3e5","epd":"rnbqkb1r/pppp1ppp/5n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6","epd":"rnbqkb1r/ppp2ppp/3p1n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4","epd":"rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4","epd":"rnbqkb1r/ppp2ppp/3p4/8/3Pn3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Berger Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 b1d2","epd":"r2qk2r/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB1N2/PP1N1PPP/R1BQR1K1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Chigorin Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1","epd":"r1bqk2r/ppp1bppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQR1K1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Chigorin Variation, Browne Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. cxd5","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4 c6b4 c4d5","epd":"r1bqk2r/ppp1bppp/8/3P4/1n1Pn3/3B1N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Chigorin Variation, Main Line","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4 c6b4 d3e2","epd":"r1bqk2r/ppp1bppp/8/3p4/1nPPn3/5N2/PP2BPPP/RNBQ1RK1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Closed Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 Nf6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 e4f6","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Jaenisch Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 c2c4","epd":"r1bqk2r/ppp1bppp/2n5/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Krause Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. Re1 Bg4 9. c3 f5 10. c4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6 e1g1 f8e7 f1e1 c8g4 c2c3 f7f5 c3c4","epd":"r2qk2r/ppp1b1pp/2n5/3p1p2/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 b kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Marshall Trap","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4 9. cxd5 f5 10. Re1 Bxh2+","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4 c4d5 f7f5 f1e1 d6h2","epd":"rn1q1rk1/ppp3pp/8/3P1p2/3Pn1b1/3B1N2/PP3PPb/RNBQR1K1 w - -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Marshall Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6","epd":"rnbqk2r/ppp2ppp/3b4/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Marshall Variation, Chinese Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Re1 Bg4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c7c6 f1e1 c8g4","epd":"rn1q1rk1/pp3ppp/2pb4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 w - -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Maróczy Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Nc6 8. Re1 Bg4 9. c3 f5 10. c4 Bh4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 b8c6 f1e1 c8g4 c2c3 f7f5 c3c4 e7h4","epd":"r2qk2r/ppp3pp/2n5/3p1p2/2PPn1bb/3B1N2/PP3PPP/RNBQR1K1 w kq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Mason Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O O-O","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8e7 e1g1 e8g8","epd":"rnbq1rk1/ppp1bppp/8/3p4/3Pn3/3B1N2/PPP2PPP/RNBQ1RK1 w - -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Mason-Showalter Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 b8c6","epd":"r1bqkb1r/ppp2ppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Staunton Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c7c6","epd":"rnbq1rk1/pp3ppp/2pb4/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 w - -"},{"eco":"C42","name":"Petrov's Defense: Classical Attack, Tarrasch Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 Bg4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d4 d6d5 f1d3 f8d6 e1g1 e8g8 c2c4 c8g4","epd":"rn1q1rk1/ppp2ppp/3b4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQ1RK1 w - -"},{"eco":"C42","name":"Petrov's Defense: Cochrane Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7","epd":"rnbqkb1r/ppp2Npp/3p1n2/8/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Cochrane Gambit, Bishop Check Line","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Bc4+","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7 e8f7 f1c4","epd":"rnbq1b1r/ppp2kpp/3p1n2/8/2B1P3/8/PPPP1PPP/RNBQK2R b KQ -"},{"eco":"C42","name":"Petrov's Defense: Cochrane Gambit, Center Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. d4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f7 e8f7 d2d4","epd":"rnbq1b1r/ppp2kpp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKB1R b KQ -"},{"eco":"C42","name":"Petrov's Defense: Cozio Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d1e2","epd":"rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPPQPPP/RNB1KB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Damiano Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 f6e4","epd":"rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Damiano Variation, Kholmov Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 Qe7","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 f6e4 d1e2 d8e7","epd":"rnb1kb1r/ppppqppp/8/4N3/4n3/8/PPPPQPPP/RNB1KB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: French Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 d2d3","epd":"rnbqkb1r/ppp2ppp/3p4/8/4n3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Italian Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Bc4","uci":"e2e4 e7e5 g1f3 g8f6 f1c4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Karklins-Martinovsky Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5d3","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/4P3/3N4/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Kaufmann Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 c2c4","epd":"rnbqkb1r/ppp2ppp/3p4/8/2P1n3/5N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Millennium Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Bd3","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 f1d3","epd":"rnbqkb1r/ppp2ppp/3p4/8/4n3/3B1N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Moody Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Qe2 Nc6 4. d4","uci":"e2e4 e7e5 g1f3 g8f6 d1e2 b8c6 d2d4","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1QPPP/RNB1KB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Nimzowitsch Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5f3 f6e4 b1c3","epd":"rnbqkb1r/ppp2ppp/3p4/8/4n3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Paulsen Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nc4","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 d7d6 e5c4","epd":"rnbqkb1r/ppp2ppp/3p1n2/8/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C42","name":"Petrov's Defense: Stafford Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 b8c6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Stafford Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 b8c6 e5c6 d7c6","epd":"r1bqkb1r/ppp2ppp/2p2n2/8/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Stafford Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. Nc3 Bc5","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 b8c6 e5c6 d7c6 b1c3 f8c5","epd":"r1bqk2r/ppp2ppp/2p2n2/2b5/4P3/2N5/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Stafford Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nc6 4. Nxc6 dxc6 5. d3 Bc5","uci":"e2e4 e7e5 g1f3 g8f6 f3e5 b8c6 e5c6 d7c6 d2d3 f8c5","epd":"r1bqk2r/ppp2ppp/2p2n2/2b5/4P3/3P4/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C42","name":"Petrov's Defense: Three Knights Game","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nc3","uci":"e2e4 e7e5 g1f3 g8f6 b1c3","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C43","name":"Bishop's Opening: Urusov Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3","uci":"e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3","epd":"rnbqkb1r/pppp1ppp/5n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C43","name":"Bishop's Opening: Urusov Gambit, Keidansky Gambit","pgn":"1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4","uci":"e2e4 e7e5 f1c4 g8f6 d2d4 e5d4 g1f3 f6e4 d1d4","epd":"rnbqkb1r/pppp1ppp/8/8/2BQn3/5N2/PPP2PPP/RNB1K2R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4","uci":"e2e4 e7e5 g1f3 g8f6 d2d4","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 exd4","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 e5d4","epd":"rnbqkb1r/pppp1ppp/5n2/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Bardeleben Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2 Nc5 6. Nxd4 Nc6","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2 e4c5 f3d4 b8c6","epd":"r1bqkb1r/pppp1ppp/2n5/2n1P3/3N4/8/PPP1QPPP/RNB1KB1R w KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Center Attack","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qxd4","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1d4","epd":"rnbqkb1r/pppp1ppp/8/4P3/3Qn3/5N2/PPP2PPP/RNB1KB1R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Center Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3","epd":"rnbqkb1r/pppp1ppp/8/4p3/3Pn3/3B1N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Murrey Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 Nc6","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3 b8c6","epd":"r1bqkb1r/pppp1ppp/2n5/4p3/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Steinitz Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Qe2","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 d1e2","epd":"rnbqkb1r/pppp1ppp/8/4P3/3pn3/5N2/PPP1QPPP/RNB1KB1R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Symmetrical Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 d5","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 d7d5","epd":"rnbqkb1r/ppp2ppp/5n2/3pp3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Tal Gambit","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 exd4 4. e5 Ne4 5. Bb5","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 e5d4 e4e5 f6e4 f1b5","epd":"rnbqkb1r/pppp1ppp/8/1B2P3/3pn3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C43","name":"Petrov's Defense: Modern Attack, Trifunovic Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Bd6 6. O-O O-O 7. c4 Bxe5","uci":"e2e4 e7e5 g1f3 g8f6 d2d4 f6e4 f1d3 d7d5 f3e5 f8d6 e1g1 e8g8 c2c4 d6e5","epd":"rnbq1rk1/ppp2ppp/8/3pb3/2PPn3/3B4/PP3PPP/RNBQ1RK1 w - -"},{"eco":"C44","name":"Dresden Opening: The Goblin","pgn":"1. e4 e5 2. Nf3 Nc6 3. c4 Nf6 4. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 c2c4 g8f6 f3e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/4N3/2P1P3/8/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Irish Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 f3e5","epd":"r1bqkbnr/pppp1ppp/2n5/4N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"King's Knight Opening: Konstantinopolsky","pgn":"1. e4 e5 2. Nf3 Nc6 3. g3","uci":"e2e4 e7e5 g1f3 b8c6 g2g3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -"},{"eco":"C44","name":"King's Knight Opening: Normal Variation","pgn":"1. e4 e5 2. Nf3 Nc6","uci":"e2e4 e7e5 g1f3 b8c6","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"King's Pawn Game: Dresden Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. c4","uci":"e2e4 e7e5 g1f3 b8c6 c2c4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Pachman Wing Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. b4","uci":"e2e4 e7e5 g1f3 b8c6 b2b4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Schulze-Müller Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nxe5 Nxe5 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 f3e5 c6e5 d2d4","epd":"r1bqkbnr/pppp1ppp/8/4n3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Tayler Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. Be2","uci":"e2e4 e7e5 g1f3 b8c6 f1e2","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Tayler Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d4","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1BPPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Tayler Opening, Basman Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d4 exd4 5. e5","uci":"e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d4 e5d4 e4e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/4P3/3p4/5N2/PPP1BPPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"King's Pawn Game: Tayler Opening, Inverted Hanham","pgn":"1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 d5 5. Nbd2","uci":"e2e4 e7e5 g1f3 b8c6 f1e2 g8f6 d2d3 d7d5 b1d2","epd":"r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -"},{"eco":"C44","name":"Latvian Gambit: Clam Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d3 f5 4. exf5","uci":"e2e4 e7e5 g1f3 b8c6 d2d3 f7f5 e4f5","epd":"r1bqkbnr/pppp2pp/2n5/4pP2/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Ponziani Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3","uci":"e2e4 e7e5 g1f3 b8c6 c2c3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Caro Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Bd7","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 c8d7","epd":"r2qkbnr/pppb1ppp/2n5/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Jaenisch Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Jaenisch Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2PP1N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Jaenisch Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3 d5","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3 d7d5","epd":"r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2PP1N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Jaenisch Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d3 d5 5. Nbd2","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d3 d7d5 b1d2","epd":"r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2PP1N2/PP1N1PPP/R1BQKB1R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Leonhardt Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 g8f6","epd":"r1bqkb1r/ppp2ppp/2n2n2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Neumann Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. Bc4","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 f1c4","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Ponziani Countergambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 f5","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Ponziani Countergambit, Schmidt Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 d6 5. d5","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 f7f5 d2d4 d7d6 d4d5","epd":"r1bqkbnr/ppp3pp/2np4/3Ppp2/4P3/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Romanishin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Be7","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 f8e7","epd":"r1bqk1nr/ppppbppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Réti Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nge7","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8e7","epd":"r1bqkb1r/ppppnppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Spanish Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Bb5","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 f1b5","epd":"r1bqkbnr/ppp2ppp/2n5/1B1pp3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Spanish Variation, Harrwitz Attack, Nikitin Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Bb5 dxe4 5. Nxe5 Qd5 6. Qa4","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 f1b5 d5e4 f3e5 d8d5 d1a4","epd":"r1b1kbnr/ppp2ppp/2n5/1B1qN3/Q3p3/2P5/PP1P1PPP/RNB1K2R b KQkq -"},{"eco":"C44","name":"Ponziani Opening: Steinitz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 d5 4. Qa4 f6","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 d7d5 d1a4 f7f6","epd":"r1bqkbnr/ppp3pp/2n2p2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -"},{"eco":"C44","name":"Ponziani Opening: Vukovic Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 c2c3 g8f6 d2d4 f6e4 d4d5 f8c5","epd":"r1bqk2r/pppp1ppp/2n5/2bPp3/4n3/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Scotch Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Scotch Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4","epd":"r1bqkbnr/pppp1ppp/2n5/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Scotch Game: Benima Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8e7 d2d4 e5d4","epd":"r1bqk1nr/ppppbppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Cochrane Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. e5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 b2c3 b4a5 e4e5","epd":"r1bqk1nr/pppp1ppp/2n5/b3P3/2B5/2P2N2/P4PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Cochrane-Shumov Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Nxf7 Nxf7 7. Bxf7+ Kxf7 8. Qh5+ g6 9. Qxc5 d5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 g5f7 h6f7 c4f7 e8f7 d1h5 g7g6 h5c5 d7d5","epd":"r1bq3r/ppp2k1p/2n3p1/2Qp4/3pP3/8/PPP2PPP/RNB1K2R w KQ -"},{"eco":"C44","name":"Scotch Game: Göring Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3","epd":"r1bqkbnr/pppp1ppp/2n5/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"C44","name":"Scotch Game: Göring Gambit, Bardeleben Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Bc4 Nf6 6. Nxc3 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 f1c4 g8f6 b1c3 f8b4","epd":"r1bqk2r/pppp1ppp/2n2n2/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Göring Gambit, Double Pawn Sacrifice","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Bc4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 f1c4","epd":"r1bqkbnr/pppp1ppp/2n5/8/2B1P3/2p2N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Göring Gambit, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 f8b4","epd":"r1bqk1nr/pppp1ppp/2n5/8/1b2P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"C44","name":"Scotch Game: Hanneken Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. O-O cxb2 7. Bxb2 Nf6 8. Ng5 O-O 9. e5 Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4 c2c3 d4c3 e1g1 c3b2 c1b2 g8f6 f3g5 e8g8 e4e5 c6e5","epd":"r1bq1rk1/pppp1ppp/5n2/4n1N1/1bB5/8/PB3PPP/RN1Q1RK1 w - -"},{"eco":"C44","name":"Scotch Game: Haxo Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5","epd":"r1bqk1nr/pppp1ppp/2n5/2b5/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Lolli Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 c6d4","epd":"r1bqkbnr/pppp1ppp/8/4p3/3nP3/5N2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Scotch Game: Lolli Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 c6d4 f3d4 e5d4 d1d4","epd":"r1bqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KB1R b KQkq -"},{"eco":"C44","name":"Scotch Game: Napoleon Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Bc4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 c6d4 f3d4 e5d4 f1c4","epd":"r1bqkbnr/pppp1ppp/8/8/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Relfsson Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bb5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1b5","epd":"r1bqkbnr/pppp1ppp/2n5/1B6/3pP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4","epd":"r1bqkbnr/pppp1ppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Advance Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 g8f6 e4e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/4P3/2Bp4/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Cochrane-Anderssen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. O-O d6 6. c3 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 e1g1 d7d6 c2c3 c8g4","epd":"r2qk1nr/ppp2ppp/2np4/2b5/2BpP1b1/2P2N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Dubois Réti Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4","epd":"r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Göring Gambit Declined","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 d5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d7d5","epd":"r1bqkbnr/ppp2ppp/2n5/3p4/3pP3/2P2N2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Kingside Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 Ng4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d4 e5d4 e4e5 f6g4","epd":"r1bqkb1r/pppp1ppp/2n5/4P3/2Bp2n1/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, London Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8b4","epd":"r1bqk1nr/pppp1ppp/2n5/8/1bBpP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C44","name":"Scotch Game: Scotch Gambit, Sarratt Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5","epd":"r1bqk1nr/pppp1ppp/2n5/2b3N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C44","name":"Scotch Game: Sea-Cadet Mate","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 dxc3 5. Nxc3 d6 6. Bc4 Bg4 7. O-O Ne5 8. Nxe5 Bxd1 9. Bxf7+ Ke7 10. Nd5#","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 c2c3 d4c3 b1c3 d7d6 f1c4 c8g4 e1g1 c6e5 f3e5 g4d1 c4f7 e8e7 c3d5","epd":"r2q1bnr/ppp1kBpp/3p4/3NN3/4P3/8/PP3PPP/R1Bb1RK1 b - -"},{"eco":"C44","name":"Scotch Game: Vitzthum Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Nh6 6. Qh5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f1c4 f8c5 f3g5 g8h6 d1h5","epd":"r1bqk2r/pppp1ppp/2n4n/2b3NQ/2BpP3/8/PPP2PPP/RNB1K2R b KQkq -"},{"eco":"C45","name":"Scotch Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4","epd":"r1bqkbnr/pppp1ppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2","epd":"r1b1k1nr/pppp1ppp/2n5/1N6/1b2P2q/8/PPPB1PPP/RN1QKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Alekhine Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. e5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 e4e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/4P3/3N4/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Blumenfeld Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 d4b5","epd":"r1b1k1nr/pppp1ppp/2n2q2/1Nb5/4P3/4B3/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Braune Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Be3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 c1e3","epd":"r1b1kbnr/pppp1ppp/2n5/8/3NP2q/4B3/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Classical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5","epd":"r1bqk1nr/pppp1ppp/2n5/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Classical Variation, Blackburne Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2","epd":"r1b1k2r/ppppnppp/2n2q2/2b5/3NP3/2P1B3/PP1Q1PPP/RN2KB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Classical Variation, Intermezzo Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nxc6 Qf6","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4c6 d8f6","epd":"r1b1k1nr/pppp1ppp/2N2q2/2b5/4P3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Classical Variation, Millennium Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Qg6","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 f6g6","epd":"r1b1k1nr/pppp1ppp/2n3q1/2b5/3NP3/2P1B3/PP3PPP/RN1QKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Fraser Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4f3","epd":"r1b1kbnr/pppp1ppp/2n5/8/4P2q/5N2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Ghulam-Kassim Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bd3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 c6d4 d1d4 d7d6 f1d3","epd":"r1bqkbnr/ppp2ppp/3p4/8/3QP3/3B4/PPP2PPP/RNB1K2R b KQkq -"},{"eco":"C45","name":"Scotch Game: Gottschall Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Qd2 d5 8. Nb5 Bxe3 9. Qxe3 O-O 10. Nxc7 Rb8 11. Nxd5 Nxd5 12. exd5 Nb4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d1d2 d7d5 d4b5 c5e3 d2e3 e8g8 b5c7 a8b8 c7d5 e7d5 e4d5 c6b4","epd":"1rb2rk1/pp3ppp/5q2/3P4/1n6/2P1Q3/PP3PPP/RN2KB1R w KQ -"},{"eco":"C45","name":"Scotch Game: Horwitz Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5","epd":"r1b1kbnr/pppp1ppp/2n5/1N6/4P2q/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Horwitz Attack, Blackburne Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2 Kd8 8. O-O Bxd2 9. Qxd2","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2 h4e4 f1e2 e8d8 e1g1 b4d2 d1d2","epd":"r1bk2nr/pppp1ppp/2n5/1N6/4q3/8/PPPQBPPP/RN3RK1 b - -"},{"eco":"C45","name":"Scotch Game: Malaniuk Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8b4","epd":"r1bqk1nr/pppp1ppp/2n5/8/1b1NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Meitner Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Nc2","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 d4c2","epd":"r1b1k2r/ppppnppp/2n2q2/2b5/4P3/2P1B3/PPN2PPP/RN1QKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Mieses Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 e4e5","epd":"r1bqkb1r/p1pp1ppp/2p2n2/4P3/8/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Modern Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 b1c3 f8b4","epd":"r1b1k1nr/pppp1ppp/2n5/8/1b1NP2q/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Paulsen Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5","epd":"r1b1k2r/ppppnppp/2n2q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R b KQkq -"},{"eco":"C45","name":"Scotch Game: Paulsen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nf5","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4f5","epd":"r1b1kbnr/pppp1ppp/2n5/5N2/4P2q/8/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Paulsen, Gunsberg Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bb5 Nd8","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 c1e3 d8f6 c2c3 g8e7 f1b5 c6d8","epd":"r1bnk2r/ppppnppp/5q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R w KQkq -"},{"eco":"C45","name":"Scotch Game: Potter Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3","epd":"r1bqk1nr/pppp1ppp/2n5/2b5/4P3/1N6/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Romanishin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb4+","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 f8c5 d4b3 c5b4","epd":"r1bqk1nr/pppp1ppp/2n5/8/1b2P3/1N6/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Rosenthal Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nb5 Bb4+ 6. Bd2 Qxe4+ 7. Be2 Kd8 8. O-O Bxd2 9. Nxd2 Qg6","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 d4b5 f8b4 c1d2 h4e4 f1e2 e8d8 e1g1 b4d2 b1d2 e4g6","epd":"r1bk2nr/pppp1ppp/2n3q1/1N6/8/8/PPPNBPPP/R2Q1RK1 w - -"},{"eco":"C45","name":"Scotch Game: Schmidt Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Steinitz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4","epd":"r1b1kbnr/pppp1ppp/2n5/8/3NP2q/8/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"C45","name":"Scotch Game: Steinitz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qh4 5. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 d8h4 b1c3","epd":"r1b1kbnr/pppp1ppp/2n5/8/3NP2q/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C45","name":"Scotch Game: Tartakower Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Nd2","uci":"e2e4 e7e5 g1f3 b8c6 d2d4 e5d4 f3d4 g8f6 d4c6 b7c6 b1d2","epd":"r1bqkb1r/p1pp1ppp/2p2n2/8/4P3/8/PPPN1PPP/R1BQKB1R b KQkq -"},{"eco":"C46","name":"Three Knights Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C46","name":"Three Knights Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 f8b4","epd":"r1bqk1nr/pppp1ppp/2n5/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C46","name":"Three Knights Opening: Schlechter Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4 4. Nd5 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 f8b4 c3d5 g8f6","epd":"r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C46","name":"Three Knights Opening: Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 g6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g7g6","epd":"r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C46","name":"Three Knights Opening: Steinitz-Rosenthal Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g7g6 d2d4 e5d4 c3d5","epd":"r1bqkbnr/pppp1p1p/2n3p1/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C46","name":"Three Knights Opening: Winawer Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 f5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game: Glek System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 g2g3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2NP1/PPPP1P1P/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Glek System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. g3 d5 5. exd5 Nxd5 6. Bg2 Nxc3 7. bxc3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 g2g3 d7d5 e4d5 f6d5 f1g2 d5c3 b2c3","epd":"r1bqkb1r/ppp2ppp/2n5/4p3/8/2P2NP1/P1PP1PBP/R1BQK2R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Gunsberg Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 a2a3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Gunsberg Variation, Provincial Opening","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 d6 5. h3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 a2a3 d7d6 h2h3","epd":"r1bqkb1r/ppp2ppp/2np1n2/4p3/4P3/P1N2N1P/1PPP1PP1/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Halloween Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/2N5/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Halloween Gambit, Oldtimer Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Ng6 6. e5 Ng8 7. Bc4 Bb4 8. Qf3 f5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5 c6e5 d2d4 e5g6 e4e5 f6g8 f1c4 f8b4 d1f3 f7f5","epd":"r1bqk1nr/pppp2pp/6n1/4Pp2/1bBP4/2N2Q2/PPP2PPP/R1B1K2R w KQkq f6"},{"eco":"C47","name":"Four Knights Game: Halloween Gambit, Plasma Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 Nxe5 5. d4 Nc6 6. d5 Ne5 7. f4 Ng6 8. e5 Ng8 9. d6 cxd6 10. exd6 Qf6 11. Nb5 Rb8","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f3e5 c6e5 d2d4 e5c6 d4d5 c6e5 f2f4 e5g6 e4e5 f6g8 d5d6 c7d6 e5d6 d8f6 c3b5 a8b8","epd":"1rb1kbnr/pp1p1ppp/3P1qn1/1N6/5P2/8/PPP3PP/R1BQKB1R w KQk -"},{"eco":"C47","name":"Four Knights Game: Italian Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 b1c3","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Italian Variation, Noa Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Bxf7+","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 b1c3 f6e4 c4f7","epd":"r1bqkb1r/pppp1Bpp/2n5/4p3/4n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Naroditsky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nd5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 c3d5","epd":"r1bqkb1r/pppp1ppp/2n2n2/3Np3/4P3/5N2/PPPP1PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4","epd":"r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation Accepted","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4","epd":"r1bqkb1r/pppp1ppp/2n2n2/8/3pP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation Accepted, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 O-O 9. O-O","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 f3d4 f8b4 d4c6 b7c6 f1d3 d7d5 e4d5 e8g8 e1g1","epd":"r1bq1rk1/p1p2ppp/2p2n2/3P4/1b6/2NB4/PPP2PPP/R1BQ1RK1 b - -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Belgrade Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 c3d5","epd":"r1bqkb1r/pppp1ppp/2n2n2/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Belgrade Gambit, Modern Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 Nxe4 6. Qe2 f5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 c3d5 f6e4 d1e2 f7f5","epd":"r1bqkb1r/pppp2pp/2n5/3N1p2/3pn3/5N2/PPP1QPPP/R1B1KB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Krause Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 f3e5","epd":"r1bqk2r/pppp1ppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R b KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. Nxe5 Qe7","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 f3e5 d8e7","epd":"r1b1k2r/ppppqppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Oxford Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 Bb4 5. d5 Nd4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 f8b4 d4d5 c6d4","epd":"r1bqk2r/pppp1ppp/5n2/3Pp3/1b1nP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C47","name":"Four Knights Game: Scotch Variation, Schmid Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Nxe4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 d2d4 e5d4 f3d4 f6e4","epd":"r1bqkb1r/pppp1ppp/2n5/8/3Nn3/2N5/PPP2PPP/R1BQKB1R w KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Bardeleben Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nxe5 7. d4 Bd6 8. f4 Nc6 9. e5 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5 e1g1 e8g8 f3e5 c6e5 d2d4 c5d6 f2f4 e5c6 e4e5 d6b4","epd":"r1bq1rk1/pppp1ppp/2n2n2/1B2P3/1b1P1P2/2N5/PPP3PP/R1BQ1RK1 w - -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Classical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8c5","epd":"r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Ranken Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6","epd":"r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4","epd":"r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2","epd":"r1bqkb1r/pppp1ppp/5n2/4p3/3nP3/2N2N2/PPPPBPPP/R1BQK2R b KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. Nxe5 Qe7 6. f4","uci":"e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 c6d4 f3e5 d8e7 f2f4","epd":"r1b1kb1r/ppppqppp/5n2/1B2N3/3nPP2/2N5/PPPP2PP/R1BQK2R b KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation Accepted","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxd4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3d4","epd":"r1bqkb1r/pppp1ppp/5n2/1B2p3/3NP3/2N5/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Nd4 5. O-O","uci":"e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 c6d4 e1g1","epd":"r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Ba4 Bc5 6. Nxe5 O-O","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5a4 f8c5 f3e5 e8g8","epd":"r1bq1rk1/pppp1ppp/5n2/2b1N3/B2nP3/2N5/PPPP1PPP/R1BQK2R w KQ -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Nxe5 Bc5 6. O-O O-O","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 f3e5 f8c5 e1g1 e8g8","epd":"r1bq1rk1/pppp1ppp/5n2/1Bb1N3/3nP3/2N5/PPPP1PPP/R1BQ1RK1 w - -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Rubinstein Variation, Maróczy Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 Nxf3+ 6. Bxf3 Bc5 7. O-O O-O 8. d3 d6 9. Na4 Bb6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 c6d4 b5e2 d4f3 e2f3 f8c5 e1g1 e8g8 d2d3 d7d6 c3a4 c5b6","epd":"r1bq1rk1/ppp2ppp/1b1p1n2/4p3/N3P3/3P1B2/PPP2PPP/R1BQ1RK1 w - -"},{"eco":"C48","name":"Four Knights Game: Spanish Variation, Spielmann Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 dxc6 6. Nxe5 Nxe4 7. Nxe4 Qd4 8. O-O Qxe5 9. Re1 Be6 10. d4 Qd5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 a7a6 b5c6 d7c6 f3e5 f6e4 c3e4 d8d4 e1g1 d4e5 f1e1 c8e6 d2d4 e5d5","epd":"r3kb1r/1pp2ppp/p1p1b3/3q4/3PN3/8/PPP2PPP/R1BQR1K1 w kq -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3","epd":"r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2bP1N2/PPP2PPP/R1BQ1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Alatortsev Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Qe7 7. Ne2 d5","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d8e7 c3e2 d7d5","epd":"r1b2rk1/ppp1qppp/2n2n2/1B1pp3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Double Spanish","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4","epd":"r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Double Spanish","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3","epd":"r1bq1rk1/pppp1ppp/2n2n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Gunsberg Counterattack","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. Nd5 Nxd5 7. exd5 e4","uci":"e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 f8b4 e1g1 e8g8 c3d5 f6d5 e4d5 e5e4","epd":"r1bq1rk1/pppp1ppp/2n5/1B1P4/1b2p3/5N2/PPPP1PPP/R1BQ1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Janowski Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Re1","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 b4c3 b2c3 d7d6 f1e1","epd":"r1bq1rk1/ppp2ppp/2np1n2/1B2p3/4P3/2PP1N2/P1P2PPP/R1BQR1K1 b - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Nimzowitsch Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. 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Re1 Nd8 10. d4 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7 f1e1 c6d8 d3d4 c8g4","epd":"r2n1rk1/ppp1qppp/3p1n2/1B2p1B1/3PP1b1/2P2N2/P1P2PPP/R2QR1K1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Symmetrical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7","epd":"r1bq1rk1/ppp1nppp/3p1n2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Symmetrical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c3e2","epd":"r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 b - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Symmetrical Variation, Blake Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Ne7 8. Nh4 c6 9. Bc4 d5 10. Bb3 Qd6","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c6e7 f3h4 c7c6 b5c4 d6d5 c4b3 d8d6","epd":"r1b2rk1/pp2nppp/2pq1n2/3pp1B1/1b2P2N/1BNP4/PPP2PPP/R2Q1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin","pgn":"1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7","uci":"e2e4 e7e5 g1f3 b8c6 b1c3 g8f6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 b4c3 b2c3 d8e7","epd":"r1b2rk1/ppp1qppp/2np1n2/1B2p1B1/4P3/2PP1N2/P1P2PPP/R2Q1RK1 w - -"},{"eco":"C49","name":"Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch Variation","pgn":"1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Be6","uci":"e2e4 e7e5 g1f3 g8f6 b1c3 b8c6 f1b5 f8b4 e1g1 e8g8 d2d3 d7d6 c1g5 c8e6","epd":"r2q1rk1/ppp2ppp/2npbn2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -"},{"eco":"C50","name":"Four Knights Game: Italian Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b1c3 g8f6","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C50","name":"Italian Game","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4","epd":"r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Anti-Fried Liver Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 h6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 h7h6","epd":"r1bqkbnr/pppp1pp1/2n4p/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Blackburne-Kostić Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nd4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 c6d4","epd":"r1bqkbnr/pppp1ppp/8/4p3/2BnP3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Classical Variation, Albin Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 c2c3","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQ1RK1 b kq -"},{"eco":"C50","name":"Italian Game: Deutz Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 e1g1 g8f6 d2d4","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3","epd":"r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. O-O Bc5 5. Nc3 d6 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 e1g1 f8c5 b1c3 d7d6 d2d3","epd":"r1bqk2r/ppp2ppp/2np1n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQ1RK1 b kq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. O-O O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b1c3 g8f6 e1g1 e8g8","epd":"r1bq1rk1/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. O-O O-O 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b1c3 g8f6 e1g1 e8g8 d2d3","epd":"r1bq1rk1/pppp1ppp/2n2n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo, Canal Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3 d7d6 c1g5","epd":"r1bqk2r/ppp2ppp/2np1n2/2b1p1B1/2B1P3/2NP1N2/PPP2PPP/R2QK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo, Dubois Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5 5. Ng5 f4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 f7f5 f3g5 f5f4","epd":"r1bqk1nr/pppp2pp/2n5/2b1p1N1/2B1Pp2/3P4/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo, Italian Four Knights Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 g8f6 b1c3","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo, Lucchini Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d3 f7f5","epd":"r1bqk1nr/pppp2pp/2n5/2b1pp2/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Pianissimo, Normal","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 d2d3 f8c5","epd":"r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Giuoco Piano","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5","epd":"r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Hungarian Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8e7","epd":"r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Hungarian Defense, Tartakower Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 Nf6 6. e5 Ne4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8e7 d2d4 e5d4 c2c3 g8f6 e4e5 f6e4","epd":"r1bqk2r/ppppbppp/2n5/4P3/2Bpn3/2P2N2/PP3PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Jerome Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Bxf7+","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 c4f7","epd":"r1bqk1nr/pppp1Bpp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Paris Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 d7d6","epd":"r1bqkbnr/ppp2ppp/2np4/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C50","name":"Italian Game: Rosentreter Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 d2d4","epd":"r1bqk1nr/pppp1ppp/2n5/2b1p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C50","name":"Italian Game: Rousseau Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4","epd":"r1bqk1nr/pppp1ppp/2n5/2b1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R b KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c8g4","epd":"r2qk1nr/ppp2ppp/1bnp4/8/2BPP1b1/2N2N2/P4PPP/R1BQ1RK1 w kq -"},{"eco":"C51","name":"Italian Game: Evans Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4","epd":"r1bqk1nr/pppp1ppp/2n5/4p3/1bB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit Declined","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6","epd":"r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit Declined","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. a4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b6 a2a4","epd":"r1bqk1nr/pppp1ppp/1bn5/4p3/PPB1P3/5N2/2PP1PPP/RNBQK2R b KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit Declined, Cordel Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bb6 5. 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Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. O-O d6 8. cxd4 Bb6 9. Nc3 Na5 10. Bg5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 e1g1 d7d6 c3d4 c5b6 b1c3 c6a5 c1g5","epd":"r1bqk1nr/ppp2ppp/1b1p4/n5B1/2BPP3/2N2N2/P4PPP/R2Q1RK1 b kq -"},{"eco":"C51","name":"Italian Game: Evans Gambit, Harding Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bc5 6. d4 exd4 7. cxd4 Bb4+ 8. Bd2","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4c5 d2d4 e5d4 c3d4 c5b4 c1d2","epd":"r1bqk1nr/pppp1ppp/2n5/8/1bBPP3/5N2/P2B1PPP/RN1QK2R b KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit, Hein Countergambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 d7d5","epd":"r1bqk1nr/ppp2ppp/2n5/2bpp3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -"},{"eco":"C51","name":"Italian Game: Evans Gambit, Mayet Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. 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O-O Nf6 7. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 e1g1 g8f6 d2d4 e5d4","epd":"r1bqk2r/pppp1ppp/2n2n2/b7/2BpP3/2P2N2/P4PPP/RNBQ1RK1 w kq -"},{"eco":"C52","name":"Italian Game: Evans Gambit, Bronstein Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 d7d6","epd":"r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -"},{"eco":"C52","name":"Italian Game: Evans Gambit, Compromised Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 f8c5 b2b4 c5b4 c2c3 b4a5 d2d4 e5d4 e1g1 d4c3","epd":"r1bqk1nr/pppp1ppp/2n5/b7/2B1P3/2p2N2/P4PPP/RNBQ1RK1 w kq -"},{"eco":"C52","name":"Italian Game: Evans Gambit, Compromised Defense, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. O-O dxc3 8. Qb3 Qf6 9. e5 Qg6 10. Nxc3 Nge7 11. 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Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4","epd":"r1bqkb1r/ppp2ppp/2n5/3np1N1/2BP4/8/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Pincus Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. d4 Bb4+","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 f6d5 d2d4 f8b4","epd":"r1bqk2r/ppp2ppp/2n5/3np1N1/1bBP4/8/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Nxe4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f6e4","epd":"r1bqkb1r/pppp1ppp/2n5/4p1N1/2B1n3/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Traxler Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. 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Nxf7","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 g5f7","epd":"r1bqk2r/pppp1Npp/2n2n2/2b1p3/2B1P3/8/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Traxler Variation, Trencianske-Teplice Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 Bc5 5. Bxf7+ Ke7 6. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 f8c5 c4f7 e8e7 d2d4","epd":"r1bq3r/ppppkBpp/2n2n2/2b1p1N1/3PP3/8/PPP2PPP/RNBQK2R b KQ -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Ulvestad Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 b7b5","epd":"r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C57","name":"Italian Game: Two Knights Defense, Ulvestad Variation, Kurkin Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 b5 6. Bf1 h6 7. Nxf7","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 b7b5 c4f1 h7h6 g5f7","epd":"r1bqkb1r/p1p2Np1/2n2n1p/1p1Pp3/8/8/PPPP1PPP/RNBQKB1R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2","epd":"r1bqkb1r/p4ppp/2p2n2/n3p1N1/8/8/PPPPBPPP/RNBQK2R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Blackburne Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 cxb5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 c6b5","epd":"r1bqkb1r/p4ppp/5n2/np2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Colman Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Rb8","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 a8b8","epd":"1rbqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQk -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Maróczy Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8e7","epd":"r1bqk2r/ppp1bpp1/5n1p/3P4/2P1p3/5N2/PPP1QPPP/RNB1K2R w KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Paoli Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Qc7 9. Bd3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3 d8c7 b5d3","epd":"r1b1kb1r/p1q2ppp/2p2n2/n3p1N1/8/3B1Q2/PPPP1PPP/RNB1K2R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Polerio Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5","epd":"r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5","epd":"r1bqkb1r/ppp2ppp/5n2/nB1Pp1N1/8/8/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 d1f3","epd":"r1bqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Polerio Defense, Kieseritzky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3","epd":"r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/3P4/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C58","name":"Italian Game: Two Knights Defense, Polerio Defense, Yankovich Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. d3 h6 7. Nf3 e4 8. Qe2 Nxc4 9. dxc4 Bc5 10. Nfd2","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 d2d3 h7h6 g5f3 e5e4 d1e2 a5c4 d3c4 f8c5 f3d2","epd":"r1bqk2r/ppp2pp1/5n1p/2bP4/2P1p3/8/PPPNQPPP/RNB1K2R b KQkq -"},{"eco":"C59","name":"Italian Game: Two Knights Defense, Knorre Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bd6 11. d4 Qc7 12. Bd2","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 f8d6 d2d4 d8c7 c1d2","epd":"r1b1k2r/p1q2pp1/2pb1n1p/n3N3/3Pp3/8/PPPBBPPP/RN1QK2R b KQkq -"},{"eco":"C59","name":"Italian Game: Two Knights Defense, Polerio Defense, Göring Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qc7","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5f3 e5e4 f3e5 d8c7","epd":"r1b1kb1r/p1q2pp1/2p2n1p/n3N3/4p3/8/PPPPBPPP/RNBQK2R w KQkq -"},{"eco":"C59","name":"Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6","epd":"r1bqkb1r/p4pp1/2p2n1p/n3p1N1/8/8/PPPPBPPP/RNBQK2R w KQkq -"},{"eco":"C59","name":"Italian Game: Two Knights Defense, Steinitz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nh3","uci":"e2e4 e7e5 g1f3 b8c6 f1c4 g8f6 f3g5 d7d5 e4d5 c6a5 c4b5 c7c6 d5c6 b7c6 b5e2 h7h6 g5h3","epd":"r1bqkb1r/p4pp1/2p2n1p/n3p3/8/7N/PPPPBPPP/RNBQK2R b KQkq -"},{"eco":"C60","name":"Ruy Lopez","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5","epd":"r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C60","name":"Ruy Lopez: Alapin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8b4","epd":"r1bqk1nr/pppp1ppp/2n5/1B2p3/1b2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Alapin Defense, Alapin Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bb4 4. c3 Ba5 5. Bxc6 dxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8b4 c2c3 b4a5 b5c6 d7c6","epd":"r1bqk1nr/ppp2ppp/2p5/b3p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Brentano Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 g5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g7g5","epd":"r1bqkbnr/pppp1p1p/2n5/1B2p1p1/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Bulgarian Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a5","epd":"r1bqkbnr/1ppp1ppp/2n5/pB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Cozio Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8e7","epd":"r1bqkb1r/ppppnppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Cozio Defense, Paulsen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. Nc3 g6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8e7 b1c3 g7g6","epd":"r1bqkb1r/ppppnp1p/2n3p1/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Cozio Defense, Tartakower Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. d4 exd4 5. Nxd4 Bg7 6. Be3 Nge7 7. Nc3 O-O 8. Qd2 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 d2d4 e5d4 f3d4 f8g7 c1e3 g8e7 b1c3 e8g8 d1d2 d7d5","epd":"r1bq1rk1/ppp1npbp/2n3p1/1B1p4/3NP3/2N1B3/PPPQ1PPP/R3K2R w KQ -"},{"eco":"C60","name":"Ruy Lopez: Fianchetto Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 g6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g7g6","epd":"r1bqkbnr/pppp1p1p/2n3p1/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Fianchetto Defense, Kevitz Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 c2c3 f7f5","epd":"r1bqkbnr/pppp3p/2n3p1/1B2pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Lucena Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8e7","epd":"r1bqk1nr/ppppbppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Nürnberg Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f6","epd":"r1bqkbnr/pppp2pp/2n2p2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Pollock Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Na5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 c6a5","epd":"r1bqkbnr/pppp1ppp/8/nB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Retreat Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nb8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 c6b8","epd":"rnbqkbnr/pppp1ppp/8/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Rotary-Albany Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 b6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 b7b6","epd":"r1bqkbnr/p1pp1ppp/1pn5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Spanish Countergambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d5","epd":"r1bqkbnr/ppp2ppp/2n5/1B1pp3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C60","name":"Ruy Lopez: Spanish Countergambit, Harding Countergambit, Fricke Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d5 4. Nxe5 Qg5 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d5 f3e5 d8g5 e1g1","epd":"r1b1kbnr/ppp2ppp/2n5/1B1pN1q1/4P3/8/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C60","name":"Ruy Lopez: Spanish Countergambit, Harding Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d5 4. Nxe5 Qg5 5. Nxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d5 f3e5 d8g5 e5c6","epd":"r1b1kbnr/ppp2ppp/2N5/1B1p2q1/4P3/8/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C60","name":"Ruy Lopez: Vinogradov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Qe7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d8e7","epd":"r1b1kbnr/ppppqppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C61","name":"Ruy Lopez: Bird Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 c6d4","epd":"r1bqkbnr/pppp1ppp/8/1B2p3/3nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C61","name":"Ruy Lopez: Bird Variation, Paulsen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 c6d4 f3d4 e5d4 e1g1 g8e7","epd":"r1bqkb1r/ppppnppp/8/1B6/3pP3/8/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C62","name":"Ruy Lopez: Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6","epd":"r1bqkbnr/ppp2ppp/2np4/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C62","name":"Ruy Lopez: Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4","epd":"r1bqkbnr/ppp2ppp/2np4/1B2p3/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C62","name":"Ruy Lopez: Steinitz Defense, Center Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 e5d4 e1g1","epd":"r1bqkbnr/ppp2ppp/2np4/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C62","name":"Ruy Lopez: Steinitz Defense, Nimzowitsch Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 b1c3 g8f6 b5c6","epd":"r2qkb1r/pppb1ppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C62","name":"Ruy Lopez: Steinitz Defense, Semi-Duras Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 c2c4","epd":"r2qkbnr/pppb1ppp/2np4/1B2p3/2PPP3/5N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5","epd":"r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Classical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qg5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 d7d5 f3e5 d5e4 e5c6 d8g5","epd":"r1b1kbnr/ppp3pp/2N5/1B4q1/4p3/8/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Dyckhoff Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3","epd":"r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Exchange Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b5c6","epd":"r1bqkbnr/pppp2pp/2B5/4pp2/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Jaenisch Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. exf5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 e4f5","epd":"r1bqkbnr/pppp2pp/2n5/1B2pP2/8/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Kostić Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 f8e7","epd":"r1bqk1nr/ppppb1pp/2n5/1B2p3/4N3/5N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Möhring Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 d5 6. Nxe5 dxe4 7. Nxc6 Qd5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 d7d5 f3e5 d5e4 e5c6 d8d5","epd":"r1b1kbnr/ppp3pp/2N5/1B1q4/4p3/8/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Schönemann Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 d2d4","epd":"r1bqkbnr/pppp2pp/2n5/1B2pp2/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C63","name":"Ruy Lopez: Schliemann Defense, Tartakower Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f7f5 b1c3 f5e4 c3e4 g8f6","epd":"r1bqkb1r/pppp2pp/2n2n2/1B2p3/4N3/5N2/PPPP1PPP/R1BQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Defense, Benelux Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3 O-O 6. d4 Bb6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3 e8g8 d2d4 c5b6","epd":"r1bq1rk1/pppp1ppp/1bn2n2/1B2p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 w - -"},{"eco":"C64","name":"Ruy Lopez: Classical Defense, Boden Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Qe7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 d8e7","epd":"r1b1k1nr/ppppqppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Defense, Zaitsev Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. O-O Nd4 5. b4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 e1g1 c6d4 b2b4","epd":"r1bqk1nr/pppp1ppp/8/1Bb1p3/1P1nP3/5N2/P1PP1PPP/RNBQ1RK1 b kq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5","epd":"r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Central Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3","epd":"r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Charousek Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 c5b6","epd":"r1bqk1nr/pppp1ppp/1bn5/1B2p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Cordel Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 f7f5","epd":"r1bqk1nr/pppp2pp/2n5/1Bb1pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Konikowski Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 c2c3 d7d5","epd":"r1bqk1nr/ppp2ppp/2n5/1Bbpp3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Modern Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3 O-O 6. d4 Bb6 7. Bg5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3 e8g8 d2d4 c5b6 c1g5","epd":"r1bq1rk1/pppp1ppp/1bn2n2/1B2p1B1/3PP3/2P2N2/PP3PPP/RN1Q1RK1 b - -"},{"eco":"C64","name":"Ruy Lopez: Classical Variation, Spanish Wing Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. b4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 f8c5 b2b4","epd":"r1bqk1nr/pppp1ppp/2n5/1Bb1p3/1P2P3/5N2/P1PP1PPP/RNBQK2R b KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Anderssen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bxc6+","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 b5c6","epd":"r1bqkb1r/ppp2ppp/2Bp1n2/4p3/4P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Duras Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 d7d6 c2c4","epd":"r1bqkb1r/ppp2ppp/2np1n2/1B2p3/2P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Kaufmann Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Be3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 f8c5 c1e3","epd":"r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/3PBN2/PPP2PPP/RN1QK2R b KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Trap","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7 5. Nxe5 c6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7 f3e5 c7c6","epd":"r1bqkb1r/pp1pnppp/2p2n2/1B2N3/4P3/3P4/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Ne7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d3 c6e7","epd":"r1bqkb1r/ppppnppp/5n2/1B2p3/4P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Beverwijk Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5","epd":"r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Fishing Pole Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Ng4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6g4","epd":"r1bqkb1r/pppp1ppp/2n5/1B2p3/4P1n1/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C65","name":"Ruy Lopez: Berlin Defense, Nyholm Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d4 exd4 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 d2d4 e5d4 e1g1","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C65","name":"Ruy Lopez: Classical Variation, Zukertort Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f8c5 c2c3","epd":"r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQ1RK1 b kq -"},{"eco":"C65","name":"Ruy Lopez: Halloween Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 f3e5","epd":"r1bqkb1r/pppp1ppp/2n2n2/1B2N3/4P3/8/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Closed Bernstein Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bg5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 c1g5","epd":"r2qk2r/pppbbppp/2np1n2/1B2p1B1/3PP3/2N2N2/PPP2PPP/R2Q1RK1 b kq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Closed Showalter Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7 7. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7 b5c6","epd":"r2qk2r/pppbbppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 b kq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Closed Wolf Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 exd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 e5d4","epd":"r2qkb1r/pppb1ppp/2np1n2/1B6/3pP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Hedgehog Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Bd7 6. Nc3 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 c8d7 b1c3 f8e7","epd":"r2qk2r/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Improved Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6","epd":"r1bqkb1r/ppp2ppp/2np1n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C66","name":"Ruy Lopez: Berlin Defense, Tarrasch Trap","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 Bd7 5. Nc3 Nf6 6. O-O Be7 7. Re1 O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 d7d6 d2d4 c8d7 b1c3 g8f6 e1g1 f8e7 f1e1 e8g8","epd":"r2q1rk1/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQR1K1 w - -"},{"eco":"C66","name":"Ruy Lopez: Closed Berlin Defense, Chigorin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O d6 5. d4 Nd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 d7d6 d2d4 f6d7","epd":"r1bqkb1r/pppn1ppp/2np4/1B2p3/3PP3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Berlin Wall","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Bd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6f5 d1d8 e8d8 b1c3 c8d7","epd":"r2k1b1r/pppb1ppp/2p5/4Pn2/8/2N2N2/PPP2PPP/R1B2RK1 w - -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Cordel Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nf5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6f5","epd":"r1bqk2r/p1ppbppp/2p5/4Pn2/8/5N2/PPP1QPPP/RNB2RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Minckwitz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. dxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d4e5","epd":"r1bqk2r/ppppbppp/2n5/1B2P3/4n3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Pillsbury Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. b3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b2b3","epd":"r1bqk2r/pnppbppp/2p5/4P3/8/1P3N2/P1P1QPPP/RNB2RK1 b kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Rio Gambit Accepted","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4","epd":"r1bqkb1r/pppp1ppp/2n5/1B2p3/4n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Rio de Janeiro Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7","epd":"r1bqk2r/ppppbppp/2n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Rio de Janeiro Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nc3 O-O 10. Re1 Nc5 11. Nd4 Ne6 12. Be3 Nxd4 13. Bxd4 c5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 b1c3 e8g8 f1e1 b7c5 f3d4 c5e6 c1e3 e6d4 e3d4 c6c5","epd":"r1bq1rk1/p1ppbppp/8/2p1P3/3B4/2N5/PPP1QPPP/R3R1K1 w - -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Rosenthal Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 a6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 a7a6","epd":"r1bqkb1r/1ppp1ppp/p1n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Trifunovic Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 d7d5","epd":"r1bqk2r/ppp1bppp/2n5/1B1pp3/3Pn3/5N2/PPP1QPPP/RNB2RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Winawer Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. Nd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 f3d4","epd":"r1bqk2r/pnppbppp/2p5/4P3/3N4/8/PPP1QPPP/RNB2RK1 b kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, Zukertort Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Be7 6. Qe2 Nd6 7. Bxc6 bxc6 8. dxe5 Nb7 9. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 f8e7 d1e2 e4d6 b5c6 b7c6 d4e5 d6b7 c2c4","epd":"r1bqk2r/pnppbppp/2p5/4P3/2P5/5N2/PP2QPPP/RNB2RK1 b kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, l'Hermet Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6","epd":"r1bqkb1r/pppp1ppp/2nn4/1B2p3/3P4/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6f5 d1d8 e8d8","epd":"r1bk1b1r/ppp2ppp/2p5/4Pn2/8/5N2/PPP2PPP/RNB2RK1 w - -"},{"eco":"C67","name":"Ruy Lopez: Berlin Defense, l'Hermet Variation, Westerinen Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Ne4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5c6 d7c6 d4e5 d6e4","epd":"r1bqkb1r/ppp2ppp/2p5/4P3/4n3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C67","name":"Ruy Lopez: Open Berlin Defense, Showalter Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Ba4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 b5a4","epd":"r1bqkb1r/pppp1ppp/2nn4/4p3/B2P4/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C67","name":"Ruy Lopez: Open Berlin Defense, l'Hermet Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 e1g1 f6e4 d2d4 e4d6 d4e5","epd":"r1bqkb1r/pppp1ppp/2nn4/1B2P3/8/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C68","name":"Ruy Lopez: Exchange Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6","epd":"r1bqkbnr/1ppp1ppp/p1B5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C68","name":"Ruy Lopez: Exchange Variation, Alekhine Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 d2d4 e5d4 d1d4 d8d4 f3d4 f8d6","epd":"r1b1k1nr/1pp2ppp/p1pb4/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq -"},{"eco":"C68","name":"Ruy Lopez: Exchange Variation, Keres Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3","epd":"r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C68","name":"Ruy Lopez: Exchange Variation, Lutikov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 b7c6","epd":"r1bqkbnr/2pp1ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C68","name":"Ruy Lopez: Exchange Variation, Romanovsky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. Nc3 f6 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 b1c3 f7f6 d2d3","epd":"r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -"},{"eco":"C68","name":"Ruy Lopez: Exchange, Alekhine Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Qxd4 Qxd4 7. Nxd4 Bd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 d2d4 e5d4 d1d4 d8d4 f3d4 c8d7","epd":"r3kbnr/1ppb1ppp/p1p5/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq -"},{"eco":"C69","name":"Ruy Lopez: Exchange Variation, Alapin Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. h3 h5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 c8g4 h2h3 h7h5","epd":"r2qkbnr/1pp2pp1/p1p5/4p2p/4P1b1/5N1P/PPPP1PP1/RNBQ1RK1 w kq -"},{"eco":"C69","name":"Ruy Lopez: Exchange Variation, Bronstein Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Qd6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 d8d6","epd":"r1b1kbnr/1pp2ppp/p1pq4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C69","name":"Ruy Lopez: Exchange Variation, Gligoric Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O f6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 f7f6","epd":"r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C69","name":"Ruy Lopez: Exchange Variation, King's Bishop Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bd6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1 f8d6","epd":"r1bqk1nr/1pp2ppp/p1pb4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C69","name":"Ruy Lopez: Exchange Variation, Normal Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5c6 d7c6 e1g1","epd":"r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C70","name":"Ruy Lopez: Bird's Defense Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 c6d4","epd":"r1bqkbnr/1ppp1ppp/p7/4p3/B2nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6","epd":"r1bqkbnr/1ppp1ppp/p1n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Alapin's Defense Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bb4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8b4","epd":"r1bqk1nr/1ppp1ppp/p1n5/4p3/Bb2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Caro Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5","epd":"r1bqkbnr/2pp1ppp/p1n5/1p2p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Classical Defense Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f8c5","epd":"r1bqk1nr/1ppp1ppp/p1n5/2b1p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Cozio Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8e7","epd":"r1bqkb1r/1pppnppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g7g6","epd":"r1bqkbnr/1ppp1p1p/p1n3p1/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Graz Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 f8c5","epd":"r1bqk1nr/2pp1ppp/p1n5/1pb1p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Norwegian Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 c6a5","epd":"r1bqkbnr/2pp1ppp/p7/np2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Norwegian Variation, Nightingale Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 6. Bxf7+","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 c6a5 b3f7","epd":"r1bqkbnr/2pp1Bpp/p7/np2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Schliemann Defense Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f7f5","epd":"r1bqkbnr/1ppp2pp/p1n5/4pp2/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C70","name":"Ruy Lopez: Morphy Defense, Schliemann Defense Deferred, Jaenisch Gambit Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 f5 5. exf5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 f7f5 e4f5","epd":"r1bqkbnr/1ppp2pp/p1n5/4pP2/B7/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C71","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6","epd":"r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -"},{"eco":"C71","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 b1c3","epd":"r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C71","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c4","epd":"r1bqkbnr/1pp2ppp/p1np4/4p3/B1P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C71","name":"Ruy Lopez: Noah's Ark Trap","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 d6 6. d4 Nxd4 7. Nxd4 exd4 8. Qxd4 c5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 b7b5 a4b3 d7d6 d2d4 c6d4 f3d4 e5d4 d1d4 c7c5","epd":"r1bqkbnr/5ppp/p2p4/1pp5/3QP3/1B6/PPP2PPP/RNB1K2R w KQkq -"},{"eco":"C72","name":"Ruy Lopez: Closed, Kecskemet Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Bd7 6. c3 Nf6 7. d4 Be7 8. Nbd2 O-O 9. Re1 Be8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 e1g1 c8d7 c2c3 g8f6 d2d4 f8e7 b1d2 e8g8 f1e1 d7e8","epd":"r2qbrk1/1pp1bppp/p1np1n2/4p3/B2PP3/2P2N2/PP1N1PPP/R1BQR1K1 w - -"},{"eco":"C72","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 e1g1","epd":"r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C73","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4","epd":"r1bqkbnr/2p2ppp/p1pp4/4p3/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C73","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. Bxc6+ bxc6 6. d4 f6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 a4c6 b7c6 d2d4 f7f6","epd":"r1bqkbnr/2p3pp/p1pp1p2/4p3/3PP3/5N2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"C74","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3","epd":"r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C74","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5 6. exf5 Bxf5 7. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5 e4f5 c8f5 e1g1","epd":"r2qkbnr/1pp3pp/p1np4/4pb2/B7/2P2N2/PP1P1PPP/RNBQ1RK1 b kq -"},{"eco":"C74","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Siesta Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 f5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 f7f5","epd":"r1bqkbnr/1pp3pp/p1np4/4pp2/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C75","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7","epd":"r2qkbnr/1ppb1ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -"},{"eco":"C75","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nge7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 d7d6 c2c3 c8d7 d2d4 g8e7","epd":"r2qkb1r/1ppbnppp/p1np4/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -"},{"eco":"C76","name":"Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Ba4 d6 6. d4 Bd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 g7g6 c2c3 a7a6 b5a4 d7d6 d2d4 c8d7","epd":"r2qkbnr/1ppb1p1p/p1np2p1/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Anderssen Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Bayreuth Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 a4c6","epd":"r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Duras Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d3 d7d6 c2c4","epd":"r1bqkb1r/1pp2ppp/p1np1n2/4p3/B1P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Jaffe Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 c2c3","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Mackenzie Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d2d4","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Tarrasch Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 b1c3","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Morphy Defense, Wormald Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB1K2R b KQkq -"},{"eco":"C77","name":"Ruy Lopez: Wormald Attack, Grünfeld Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2 b7b5 a4b3 f8e7 d2d4 d7d6 c2c3 c8g4","epd":"r2qk2r/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP2QPPP/RNB1K2R w KQkq -"},{"eco":"C78","name":"Ruy Lopez: Brix Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O g6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 g7g6","epd":"r1bqkb1r/1ppp1p1p/p1n2np1/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Central Countergambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d5","epd":"r1bqkb1r/1pp2ppp/p1n2n2/3pp3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1","epd":"r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6","epd":"r1bqkb1r/2p2ppp/p1np1n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense, Arkhangelsk Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 c8b7","epd":"r2qkb1r/1bpp1ppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense, Møller Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8c5","epd":"r1bqk2r/1ppp1ppp/p1n2n2/2b1p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 f8c5","epd":"r1bqk2r/2pp1ppp/p1n2n2/1pb1p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C78","name":"Ruy Lopez: Morphy Defense, Wing Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. a4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 f8e7 a2a4","epd":"r1bqk2r/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C78","name":"Ruy Lopez: Rabinovich Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 7. Ng5 d5 8. exd5 Nd4 9. Re1 Bc5 10. Rxe5+ Kf8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 b7b5 a4b3 d7d6 f3g5 d6d5 e4d5 c6d4 f1e1 f8c5 e1e5 e8f8","epd":"r1bq1k1r/2p2ppp/p4n2/1pbPR1N1/3n4/1B6/PPPP1PPP/RNBQ2K1 w - -"},{"eco":"C79","name":"Ruy Lopez: Morphy Defense, Steinitz Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6","epd":"r1bqkb1r/1pp2ppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C79","name":"Ruy Lopez: Morphy Defense, Steinitz Deferred","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4","epd":"r1bqkb1r/2p2ppp/p1pp4/4p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C79","name":"Ruy Lopez: Steinitz Defense Deferred, Boleslavsky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Nxe4 8. Re1 f5 9. dxe5 d5 10. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 f6e4 f1e1 f7f5 d4e5 d6d5 b1c3","epd":"r1bqkb1r/2p3pp/p1p5/3pPp2/4n3/2N2N2/PPP2PPP/R1BQR1K1 b kq -"},{"eco":"C79","name":"Ruy Lopez: Steinitz Defense Deferred, Lipnitsky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6 6. Bxc6+ bxc6 7. d4 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 d7d6 a4c6 b7c6 d2d4 c8g4","epd":"r2qkb1r/2p2ppp/p1pp1n2/4p3/3PP1b1/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Morphy Defense, Tartakower Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Qe2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d1e2","epd":"r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPPQPPP/RNB2RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4","epd":"r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Open","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4","epd":"r1bqkb1r/1ppp1ppp/p1n5/4p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3","epd":"r1bqkb1r/2pp1ppp/p1n5/1p2p3/3Pn3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5","epd":"r1bqkb1r/2p2ppp/p1n5/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Berger Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4 9. Nxd4 exd4 10. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4 f3d4 e5d4 b1c3","epd":"r1bqkb1r/2p2ppp/p7/1p1p4/P2pn3/1BN5/1PP2PPP/R1BQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Bernstein Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2","epd":"r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPPN1PPP/R1BQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Bernstein Variation, Luther Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Bc5 10. Qe1","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 f8c5 d1e1","epd":"r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1B3N2/PPPN1PPP/R1B1QRK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Friess Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 f3e5","epd":"r1bqkb1r/2pp1ppp/p1n5/1p2N3/B2Pn3/8/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Harksen Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 c2c4","epd":"r1bqkb1r/2p2ppp/p1n5/1p1pp3/2PPn3/1B3N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Karpov Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 d4 11. Ng5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 e4c5 c2c3 d5d4 f3g5","epd":"r2qkb1r/2p2ppp/p1n1b3/1pn1P1N1/3p4/1BP5/PP1N1PPP/R1BQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Knorre Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 b1c3","epd":"r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6","epd":"r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Richter Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 d4d5","epd":"r1bqkb1r/2pp1ppp/p1n5/1p1Pp3/B3n3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Riga Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 e5d4","epd":"r1bqkb1r/1ppp1ppp/p1n5/8/B2pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Schlechter Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. a4 Nxd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 a2a4 c6d4","epd":"r1bqkb1r/2p2ppp/p7/1p1pp3/P2nn3/1B3N2/1PP2PPP/RNBQ1RK1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Skipworth Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. Re1 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 f1e1 d7d5","epd":"r1bqkb1r/1pp2ppp/p1n5/3pp3/B3n3/5N2/PPPP1PPP/RNBQR1K1 w kq -"},{"eco":"C80","name":"Ruy Lopez: Open, Zukertort Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Ne7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c6e7","epd":"r1bqkb1r/2p1nppp/p7/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -"},{"eco":"C81","name":"Ruy Lopez: Open, Howell Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2","epd":"r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP1QPPP/RNB2RK1 b kq -"},{"eco":"C81","name":"Ruy Lopez: Open, Howell Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. c4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 c2c4","epd":"r2qk2r/2p1bppp/p1n1b3/1p1pP3/2P1n3/1B3N2/PP2QPPP/RNB2RK1 b kq -"},{"eco":"C81","name":"Ruy Lopez: Open, Howell Attack, Ekstrom Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Qd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 d1e2 f8e7 f1d1 e8g8 c2c4 b5c4 b3c4 d8d7","epd":"r4rk1/2pqbppp/p1n1b3/3pP3/2B1n3/5N2/PP2QPPP/RNBR2K1 w - -"},{"eco":"C82","name":"Ruy Lopez: Open","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3","epd":"r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"C82","name":"Ruy Lopez: Open, Berlin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Nc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 e4c5","epd":"r2qkb1r/2p2ppp/p1n1b3/1pnpP3/8/1BP2N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"C82","name":"Ruy Lopez: Open, Dilworth Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2 O-O 11. Bc2 Nxf2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2 e8g8 b3c2 e4f2","epd":"r2q1rk1/2p2ppp/p1n1b3/1pbpP3/8/2P2N2/PPBN1nPP/R1BQ1RK1 w - -"},{"eco":"C82","name":"Ruy Lopez: Open, Italian Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5","epd":"r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"C82","name":"Ruy Lopez: Open, Motzko Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3","epd":"r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 b kq -"},{"eco":"C82","name":"Ruy Lopez: Open, Motzko Attack, Nenarokov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Qd3 Ne7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 d1d3 c6e7","epd":"r2qk2r/2p1nppp/p3b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 w kq -"},{"eco":"C82","name":"Ruy Lopez: Open, St. Petersburg Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Bc5 10. Nbd2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8c5 b1d2","epd":"r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP1N1PPP/R1BQ1RK1 b kq -"},{"eco":"C83","name":"Ruy Lopez: Open, Breslau Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Nxe5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 c6e5","epd":"r2q1rk1/2p1bppp/p3b3/1p1pn3/3Nn3/1BP5/PP3PPP/RNBQR1K1 w - -"},{"eco":"C83","name":"Ruy Lopez: Open, Classical Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7","epd":"r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"C83","name":"Ruy Lopez: Open, Classical Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 b1d2 e4c5 c2c3 f8e7","epd":"r2qk2r/2p1bppp/p1n1b3/1pnpP3/8/1BP2N2/PP1N1PPP/R1BQ1RK1 w kq -"},{"eco":"C83","name":"Ruy Lopez: Open, Classical Defense, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Re1 b5 8. Bb3 d5 9. dxe5 Be6 10. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 f8e7 f1e1 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3","epd":"r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQR1K1 b kq -"},{"eco":"C83","name":"Ruy Lopez: Open, Malkin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Nbd2 O-O 11. Qe2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 b1d2 e8g8 d1e2","epd":"r2q1rk1/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP1NQPPP/R1B2RK1 b - -"},{"eco":"C83","name":"Ruy Lopez: Open, Tarrasch Trap","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. c3 Be7 10. Re1 O-O 11. Nd4 Qd7 12. Nxe6 fxe6 13. Rxe4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f6e4 d2d4 b7b5 a4b3 d7d5 d4e5 c8e6 c2c3 f8e7 f1e1 e8g8 f3d4 d8d7 d4e6 f7e6 e1e4","epd":"r4rk1/2pqb1pp/p1n1p3/1p1pP3/4R3/1BP5/PP3PPP/RNBQ2K1 b - -"},{"eco":"C84","name":"Ruy Lopez: Closed","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7","epd":"r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -"},{"eco":"C84","name":"Ruy Lopez: Closed, Basque Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4 e5d4 e4e5 f6e4 c2c3","epd":"r1bqk2r/1pppbppp/p1n5/4P3/B2pn3/2P2N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"C84","name":"Ruy Lopez: Closed, Center Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4","epd":"r1bqk2r/1pppbppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C84","name":"Ruy Lopez: Closed, Center Attack, Basque Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d4 exd4 7. e5 Ne4 8. c3 dxc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d4 e5d4 e4e5 f6e4 c2c3 d4c3","epd":"r1bqk2r/1pppbppp/p1n5/4P3/B3n3/2p2N2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"C84","name":"Ruy Lopez: Closed, Martinez Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d2d3","epd":"r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQ1RK1 b kq -"},{"eco":"C84","name":"Ruy Lopez: Closed, Morphy Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Nc3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 b1c3","epd":"r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -"},{"eco":"C85","name":"Ruy Lopez: Closed, Delayed Exchange","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 a4c6","epd":"r1bqk2r/1pppbppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -"},{"eco":"C86","name":"Ruy Lopez: Closed, Worrall Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2","epd":"r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB2RK1 b kq -"},{"eco":"C86","name":"Ruy Lopez: Closed, Worrall Attack, Castling Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 e8g8","epd":"r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w - -"},{"eco":"C86","name":"Ruy Lopez: Closed, Worrall Attack, Castling Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. O-O b5 7. Bb3 O-O 8. c3 d5 9. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 d1e2 f8e7 e1g1 b7b5 a4b3 e8g8 c2c3 d7d5 d2d3","epd":"r1bq1rk1/2p1bppp/p1n2n2/1p1pp3/4P3/1BPP1N2/PP2QPPP/RNB2RK1 b - -"},{"eco":"C86","name":"Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 b5 7. Bb3 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 d1e2 b7b5 a4b3 d7d6","epd":"r1bqk2r/2p1bppp/p1np1n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w kq -"},{"eco":"C87","name":"Ruy Lopez: Closed, Averbakh Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 d6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 d7d6","epd":"r1bqk2r/1pp1bppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQR1K1 w kq -"},{"eco":"C88","name":"Ruy Lopez: Closed","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3","epd":"r1bqk2r/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 b kq -"},{"eco":"C88","name":"Ruy Lopez: Closed","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8","epd":"r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w - -"},{"eco":"C88","name":"Ruy Lopez: Closed, Alekhine Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. Nbd2 O-O 12. Nf1 Bg4 13. Ne3 Bxf3 14. Qxf3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 e8g8 d2f1 c8g4 f1e3 g4f3 d1f3","epd":"r4rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P1NQ2/PPB2PPP/R1B1R1K1 b - -"},{"eco":"C88","name":"Ruy Lopez: Closed, Anti-Marshall","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 a2a4","epd":"r1bq1rk1/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQR1K1 b - -"},{"eco":"C88","name":"Ruy Lopez: Closed, Balla Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 a2a4","epd":"r1b1k2r/2q1bppp/p2p1n2/npp1p3/P2PP3/2P2N2/1PB2PPP/RNBQR1K1 b kq -"},{"eco":"C88","name":"Ruy Lopez: Closed, Leonhardt Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. h3 Nc6 12. d5 Nb8 13. Nbd2 g5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 c6a5 b3c2 c7c5 d2d4 d8c7 h2h3 a5c6 d4d5 c6b8 b1d2 g7g5","epd":"rnb1k2r/2q1bp1p/p2p1n2/1ppPp1p1/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 w kq -"},{"eco":"C88","name":"Ruy Lopez: Closed, Rosen Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 d2d4","epd":"r1bqk2r/2p1bppp/p1np1n2/1p2p3/3PP3/1B3N2/PPP2PPP/RNBQR1K1 b kq -"},{"eco":"C88","name":"Ruy Lopez: Closed, Trajkovic Counterattack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 Bb7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 c8b7","epd":"r2qk2r/1bppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w kq -"},{"eco":"C88","name":"Ruy Lopez: Noah's Ark Trap","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. d4 Nxd4 9. Nxd4 exd4 10. Qxd4 c5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 d2d4 c6d4 f3d4 e5d4 d1d4 c7c5","epd":"r1bqk2r/4bppp/p2p1n2/1pp5/3QP3/1B6/PPP2PPP/RNB1R1K1 w kq -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5","epd":"r1bq1rk1/2p1bppp/p1n2n2/1p1pp3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. a4 Bb7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 a2a4 c8b7","epd":"r2q1rk1/1bp1bppp/p1n5/1p1np3/P7/1BP2N2/1P1P1PPP/RNBQR1K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4","epd":"r1bq1rk1/4bppp/p1p5/1p1nR3/3P4/1BP5/PP3PPP/RNBQ2K1 b - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Main Line, Spassky Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15. Be3 Bg4 16. Qd3 Rae8 17. Nd2 Re6 18. a4 Qh5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3 c1e3 c8g4 d1d3 a8e8 b1d2 e8e6 a2a4 h3h5","epd":"5rk1/5ppp/p1pbr3/1p1n3q/P2P2b1/1BPQB1P1/1P1N1P1P/R3R1K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Modern Main Line","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 d2d4 e7d6 e5e1 d8h4 g2g3 h4h3","epd":"r1b2rk1/5ppp/p1pb4/1p1n4/3P4/1BP3Pq/PP3P1P/RNBQR1K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Modern Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6","epd":"r1bq1rk1/4bppp/p1p5/1p1nR3/8/1BP5/PP1P1PPP/RNBQ2K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Original Marshall Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 Nf6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 d5f6","epd":"r1bq1rk1/2p1bppp/p4n2/1p2R3/8/1BP5/PP1P1PPP/RNBQ2K1 w - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Re3 Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. Bxd5 cxd5 13. d4 Bd6 14. Re3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 f6d5 f3e5 c6e5 e1e5 c7c6 b3d5 c6d5 d2d4 e7d6 e5e3","epd":"r1bq1rk1/5ppp/p2b4/1p1p4/3P4/2P1R3/PP3PPP/RNBQ2K1 b - -"},{"eco":"C89","name":"Ruy Lopez: Marshall Attack, Steiner Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 e4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 c2c3 d7d5 e4d5 e5e4","epd":"r1bq1rk1/2p1bppp/p1n2n2/1p1P4/4p3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -"},{"eco":"C90","name":"Ruy Lopez: Closed","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -"},{"eco":"C90","name":"Ruy Lopez: Closed, Lutikov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. Bc2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 b3c2","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/2P2N2/PPBP1PPP/RNBQR1K1 b - -"},{"eco":"C90","name":"Ruy Lopez: Closed, Pilnik Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. d3 d6 9. c3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 e8g8 d2d3 d7d6 c2c3","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BPP1N2/PP3PPP/RNBQR1K1 b - -"},{"eco":"C90","name":"Ruy Lopez: Closed, Suetin Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. a3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 a2a3","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/PBP2N2/1P1P1PPP/RNBQR1K1 b - -"},{"eco":"C91","name":"Ruy Lopez: Closed, Bogoljubow Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4 c8g4","epd":"r2q1rk1/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP3PPP/RNBQR1K1 w - -"},{"eco":"C91","name":"Ruy Lopez: Closed, Yates Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/3PP3/1BP2N2/PP3PPP/RNBQR1K1 b - -"},{"eco":"C91","name":"Ruy Lopez: Closed, Yates Variation, Short Attack","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Bg4 10. a4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 d2d4 c8g4 a2a4","epd":"r2q1rk1/2p1bppp/p1np1n2/1p2p3/P2PP1b1/1BP2N2/1P3PPP/RNBQR1K1 b - -"},{"eco":"C92","name":"Ruy Lopez: Closed","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3","epd":"r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 b - -"},{"eco":"C92","name":"Ruy Lopez: Closed, Flohr System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Bb7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8b7","epd":"r2q1rk1/1bp1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C92","name":"Ruy Lopez: Closed, Karpov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 f6d7","epd":"r1bq1rk1/2pnbppp/p1np4/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C92","name":"Ruy Lopez: Closed, Kholmov Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Be6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8e6","epd":"r2q1rk1/2p1bppp/p1npbn2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C92","name":"Ruy Lopez: Closed, Smyslov-Breyer-Zaitsev Hybrid","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Bb7 10. d4 Re8 11. Nbd2 Bf8 12. a3 h6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c8b7 d2d4 f8e8 b1d2 e7f8 a2a3 h7h6","epd":"r2qrbk1/1bp2pp1/p1np1n1p/1p2p3/3PP3/PBP2N1P/1P1N1PP1/R1BQR1K1 w - -"},{"eco":"C92","name":"Ruy Lopez: Closed, Zaitsev System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Re8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 f8e8","epd":"r1bqr1k1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C93","name":"Ruy Lopez: Closed, Smyslov Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 h6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 h7h6","epd":"r1bq1rk1/2p1bpp1/p1np1n1p/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C94","name":"Ruy Lopez: Closed, Breyer Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8","epd":"rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C94","name":"Ruy Lopez: Closed, Breyer Defense, Quiet Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d3","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d3","epd":"rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BPP1N1P/PP3PP1/RNBQR1K1 b - -"},{"eco":"C95","name":"Ruy Lopez: Closed, Breyer","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4","epd":"rnbq1rk1/2p1bppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 b - -"},{"eco":"C95","name":"Ruy Lopez: Closed, Breyer Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 c5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7 b1d2 c8b7 b3c2 c7c5","epd":"r2q1rk1/1b1nbppp/p2p1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -"},{"eco":"C95","name":"Ruy Lopez: Closed, Breyer Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nh4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7 f3h4","epd":"r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP2N/1BP4P/PP3PP1/RNBQR1K1 b - -"},{"eco":"C95","name":"Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6b8 d2d4 b8d7","epd":"r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 w - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Borisenko Variation","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 a5c6","epd":"r1bq1rk1/4bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2","epd":"r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 b - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5","epd":"r1bq1rk1/4bppp/p2p1n2/npp1p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 d5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 d6d5","epd":"r1bq1rk1/2p1bppp/p4n2/np1pp3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Keres Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nd7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 f6d7","epd":"r1bq1rk1/3nbppp/p2p4/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -"},{"eco":"C96","name":"Ruy Lopez: Closed, Rossolimo Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c6 11. d4 Qc7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c6 d2d4 d8c7","epd":"r1b2rk1/2q1bppp/p1pp1n2/np2p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -"},{"eco":"C97","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5","epd":"r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -"},{"eco":"C97","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7","epd":"r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -"},{"eco":"C97","name":"Ruy Lopez: Closed, Chigorin, Yugoslav System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 Rfe8 14. Ne3 g6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c8d7 d2f1 f8e8 f1e3 g7g6","epd":"r3r1k1/2qbbp1p/p2p1np1/npp1p3/3PP3/2P1NN1P/PPB2PP1/R1BQR1K1 w - -"},{"eco":"C98","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6","epd":"r1b2rk1/2q1bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -"},{"eco":"C98","name":"Ruy Lopez: Closed, Chigorin Defense","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. dxc5","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 a5c6 d4c5","epd":"r1b2rk1/2q1bppp/p1np1n2/1pP1p3/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 b - -"},{"eco":"C99","name":"Ruy Lopez: Closed, Chigorin Defense, Panov System","pgn":"1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4","uci":"e2e4 e7e5 g1f3 b8c6 f1b5 a7a6 b5a4 g8f6 e1g1 f8e7 f1e1 b7b5 a4b3 d7d6 c2c3 e8g8 h2h3 c6a5 b3c2 c7c5 d2d4 d8c7 b1d2 c5d4 c3d4","epd":"r1b2rk1/2q1bppp/p2p1n2/np2p3/3PP3/5N1P/PPBN1PP1/R1BQR1K1 b - -"},{"eco":"D00","name":"Amazon Attack","pgn":"1. d4 d5 2. Qd3","uci":"d2d4 d7d5 d1d3","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit","pgn":"1. d4 d5 2. e4","uci":"d2d4 d7d5 e2e4","epd":"rnbqkbnr/ppp1pppp/8/3p4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3","epd":"rnbqkb1r/ppp1pppp/5n2/8/3P4/2N2p2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Bogoljubow Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6","epd":"rnbqkb1r/ppp1pp1p/5np1/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Kh1","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 e1g1 e8g8 g1h1","epd":"rnbq1rk1/ppp1ppbp/5np1/8/2BP4/2N2N2/PPP3PP/R1BQ1R1K b - -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. h4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 h2h4","epd":"rnbqk2r/ppp1ppbp/5np1/8/2BP3P/2N2N2/PPP3P1/R1BQK2R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. Ne5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 f3e5","epd":"rnbqk2r/ppp1ppbp/5np1/4N3/2BP4/2N5/PPP3PP/R1BQK2R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 g6 6. Bc4 Bg7 7. O-O O-O 8. Qe1","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 g7g6 f1c4 f8g7 e1g1 e8g8 d1e1","epd":"rnbq1rk1/ppp1ppbp/5np1/8/2BP4/2N2N2/PPP3PP/R1B1QRK1 b - -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Euwe Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Euwe Defense, Duthilleul Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6 6. Bd3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 e7e6 f1d3","epd":"rnbqkb1r/ppp2ppp/4pn2/8/3P4/2NB1N2/PPP3PP/R1BQK2R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 e6 6. Bg5 Be7 7. Bd3 Nc6 8. O-O Nxd4 9. Kh1","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 e7e6 c1g5 f8e7 f1d3 b8c6 e1g1 c6d4 g1h1","epd":"r1bqk2r/ppp1bppp/4pn2/6B1/3n4/2NB1N2/PPP3PP/R2Q1R1K b kq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Gunderam Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8f5","epd":"rn1qkb1r/ppp1pppp/5n2/5b2/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bf5 6. Ne5 e6 7. g4 Be4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8f5 f3e5 e7e6 g2g4 f5e4","epd":"rn1qkb1r/ppp2ppp/4pn2/4N3/3Pb1P1/2N5/PPP4P/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Holwell Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Qd6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 d8d6","epd":"rnb1kb1r/ppp1pppp/3q1n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Kaulich Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c7c5","epd":"rnbqkb1r/pp2pppp/5n2/2p5/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Pietrowsky Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nc6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b8c6","epd":"r1bqkb1r/ppp1pppp/2n2n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Ritter Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 b6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b7b6","epd":"rnbqkb1r/p1p1pppp/1p3n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Ryder Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 d1f3","epd":"rnbqkb1r/ppp1pppp/5n2/8/3P4/2N2Q2/PPP3PP/R1B1KBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Schlutter Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Nbd7","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 b8d7","epd":"r1bqkb1r/pppnpppp/5n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Teichmann Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4","epd":"rn1qkb1r/ppp1pppp/5n2/8/3P2b1/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Qf2","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 f3f2","epd":"rn1qkb1r/pp2pppp/2p2n2/8/3P4/2N4P/PPP2QP1/R1B1KB1R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. Be3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 c1e3","epd":"rn1qkb1r/pp2pppp/2p2n2/8/3P4/2N1BQ1P/PPP3P1/R3KB1R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 Bg4 6. h3 Bxf3 7. Qxf3 c6 8. g4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c8g4 h2h3 g4f3 d1f3 c7c6 g2g4","epd":"rn1qkb1r/pp2pppp/2p2n2/8/3P2P1/2N2Q1P/PPP5/R1B1KB1R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Accepted: Ziegler Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Nxf3 c6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4f3 g1f3 c7c6","epd":"rnbqkb1r/pp2pppp/2p2n2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Brombacher Countergambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c7c5","epd":"rnbqkb1r/pp2pppp/5n2/2p5/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Elbert Countergambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e7e5","epd":"rnbqkb1r/ppp2ppp/5n2/4p3/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Gedult Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 a6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 a7a6","epd":"rnbqkb1r/1pp1pppp/p4n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Lamb Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Nc6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 b8c6","epd":"r1bqkb1r/ppp1pppp/2n2n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Langeheinicke Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e4e3","epd":"rnbqkb1r/ppp1pppp/5n2/8/3P4/2N1pP2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: O'Kelly Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 c6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c7c6","epd":"rnbqkb1r/pp2pppp/2p2n2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Vienna Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 Bf5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 c8f5","epd":"rn1qkb1r/ppp1pppp/5n2/5b2/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Weinsbach Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit Declined: Weinsbach Defense, Pfrang Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6 5. fxe4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 f2f3 e7e6 f3e4","epd":"rnbqkb1r/ppp2ppp/4pn2/8/3PP3/2N5/PPP3PP/R1BQKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Blackmar Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. f3","uci":"d2d4 d7d5 e2e4 d5e4 f2f3","epd":"rnbqkbnr/ppp1pppp/8/8/3Pp3/5P2/PPP3PP/RNBQKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Diemer-Rosenberg Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Be3","uci":"d2d4 d7d5 e2e4 d5e4 c1e3","epd":"rnbqkbnr/ppp1pppp/8/8/3Pp3/4B3/PPP2PPP/RN1QKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Fritz Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Bc4","uci":"d2d4 d7d5 e2e4 d5e4 f1c4","epd":"rnbqkbnr/ppp1pppp/8/8/2BPp3/8/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5","epd":"rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. dxe5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 d4e5","epd":"rnbqkbnr/ppp2ppp/8/4P3/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nxe4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 c3e4","epd":"rnbqkbnr/ppp2ppp/8/4p3/3PN3/8/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Nge2","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 g1e2","epd":"rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N5/PPP1NPPP/R1BQKB1R b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Qh5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 d1h5","epd":"rnbqkbnr/ppp2ppp/8/4p2Q/3Pp3/2N5/PPP2PPP/R1B1KBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 e5 4. Be3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 e7e5 c1e3","epd":"rnbqkbnr/ppp2ppp/8/4p3/3Pp3/2N1B3/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Netherlands Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 f5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 f7f5","epd":"rnbqkbnr/ppp1p1pp/8/5p2/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Rasa-Studier Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Be3","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1e3","epd":"rnbqkb1r/ppp1pppp/5n2/8/3Pp3/2N1B3/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Reversed Albin Countergambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 c5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 c7c5","epd":"rnbqkbnr/pp2pppp/8/2p5/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Zeller Defense","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Bf5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 c8f5","epd":"rn1qkbnr/ppp1pppp/8/5b2/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: Zeller Defense, Soller Attack","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Bf5 4. f3 Nf6 5. Bc4","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 c8f5 f2f3 g8f6 f1c4","epd":"rn1qkb1r/ppp1pppp/5n2/5b2/2BPp3/2N2P2/PPP3PP/R1BQK1NR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: von Popiel Gambit","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1g5","epd":"rnbqkb1r/ppp1pppp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"D00","name":"Blackmar-Diemer Gambit: von Popiel Gambit, Zilbermints Variation","pgn":"1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. Bg5 Bf5 5. Bxf6 exf6 6. g4 Bg6 7. Qe2 Bb4 8. Qb5+","uci":"d2d4 d7d5 e2e4 d5e4 b1c3 g8f6 c1g5 c8f5 g5f6 e7f6 g2g4 f5g6 d1e2 f8b4 e2b5","epd":"rn1qk2r/ppp2ppp/5pb1/1Q6/1b1Pp1P1/2N5/PPP2P1P/R3KBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game","pgn":"1. d4 d5","uci":"d2d4 d7d5","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game","pgn":"1. d4 d5 2. e3","uci":"d2d4 d7d5 e2e3","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game","pgn":"1. d4 d5 2. e3 Nf6","uci":"d2d4 d7d5 e2e3 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Accelerated London System","pgn":"1. d4 d5 2. Bf4","uci":"d2d4 d7d5 c1f4","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Accelerated London System, Steinitz Countergambit","pgn":"1. d4 d5 2. Bf4 c5","uci":"d2d4 d7d5 c1f4 c7c5","epd":"rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted","pgn":"1. d4 d5 2. Bf4 c5 3. dxc5","uci":"d2d4 d7d5 c1f4 c7c5 d4c5","epd":"rnbqkbnr/pp2pppp/8/2Pp4/5B2/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit","pgn":"1. d4 d5 2. Bf4 c5 3. e4","uci":"d2d4 d7d5 c1f4 c7c5 e2e4","epd":"rnbqkbnr/pp2pppp/8/2pp4/3PPB2/8/PPP2PPP/RN1QKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted","pgn":"1. d4 d5 2. Bf4 c5 3. e4 dxe4","uci":"d2d4 d7d5 c1f4 c7c5 e2e4 d5e4","epd":"rnbqkbnr/pp2pppp/8/2p5/3PpB2/8/PPP2PPP/RN1QKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation","pgn":"1. d4 d5 2. Nc3","uci":"d2d4 d7d5 b1c3","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation","pgn":"1. d4 d5 2. Nc3 e6","uci":"d2d4 d7d5 b1c3 e7e6","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Alburt Defense","pgn":"1. d4 d5 2. Nc3 Bf5","uci":"d2d4 d7d5 b1c3 c8f5","epd":"rn1qkbnr/ppp1pppp/8/3p1b2/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Anti-Veresov","pgn":"1. d4 d5 2. Nc3 Bg4","uci":"d2d4 d7d5 b1c3 c8g4","epd":"rn1qkbnr/ppp1pppp/8/3p4/3P2b1/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Fianchetto Defense","pgn":"1. d4 g6 2. Nf3 Bg7 3. Nc3 d5","uci":"d2d4 g7g6 g1f3 f8g7 b1c3 d7d5","epd":"rnbqk1nr/ppp1ppbp/6p1/3p4/3P4/2N2N2/PPP1PPPP/R1BQKB1R w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Irish Gambit","pgn":"1. d4 d5 2. Nc3 c5","uci":"d2d4 d7d5 b1c3 c7c5","epd":"rnbqkbnr/pp2pppp/8/2pp4/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Shaviliuk Gambit","pgn":"1. d4 d5 2. Nc3 e5","uci":"d2d4 d7d5 b1c3 e7e5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Chigorin Variation, Shropshire Defense","pgn":"1. d4 d5 2. Nc3 h5","uci":"d2d4 d7d5 b1c3 h7h5","epd":"rnbqkbnr/ppp1ppp1/8/3p3p/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Hübsch Gambit","pgn":"1. d4 Nf6 2. Nc3 d5 3. e4","uci":"d2d4 g8f6 b1c3 d7d5 e2e4","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Levitsky Attack","pgn":"1. d4 d5 2. Bg5","uci":"d2d4 d7d5 c1g5","epd":"rnbqkbnr/ppp1pppp/8/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Levitsky Attack, Welling Variation","pgn":"1. d4 d5 2. Bg5 Bg4","uci":"d2d4 d7d5 c1g5 c8g4","epd":"rn1qkbnr/ppp1pppp/8/3p2B1/3P2b1/8/PPP1PPPP/RN1QKBNR w KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Mason Attack","pgn":"1. d4 d5 2. f4","uci":"d2d4 d7d5 f2f4","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Stonewall Attack","pgn":"1. d4 d5 2. e3 Nf6 3. Bd3","uci":"d2d4 d7d5 e2e3 g8f6 f1d3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/3BP3/PPP2PPP/RNBQK1NR b KQkq -"},{"eco":"D00","name":"Queen's Pawn Game: Zurich Gambit","pgn":"1. d4 d5 2. g4","uci":"d2d4 d7d5 g2g4","epd":"rnbqkbnr/ppp1pppp/8/3p4/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -"},{"eco":"D01","name":"Rapport-Jobava System","pgn":"1. d4 d5 2. Nc3 Nf6 3. Bf4","uci":"d2d4 d7d5 b1c3 g8f6 c1f4","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR b KQkq -"},{"eco":"D01","name":"Rapport-Jobava System","pgn":"1. d4 d5 2. Nc3 Nf6 3. Bf4 e6","uci":"d2d4 d7d5 b1c3 g8f6 c1f4 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR w KQkq -"},{"eco":"D01","name":"Rapport-Jobava System","pgn":"1. d4 d5 2. Nc3 Nf6 3. Bf4 g6","uci":"d2d4 d7d5 b1c3 g8f6 c1f4 g7g6","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR w KQkq -"},{"eco":"D01","name":"Rapport-Jobava System, with e6","pgn":"1. d4 d5 2. Nc3 e6 3. Bf4","uci":"d2d4 d7d5 b1c3 e7e6 c1f4","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/3P1B2/2N5/PPP1PPPP/R2QKBNR b KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5","uci":"d2d4 g8f6 b1c3 d7d5 c1g5","epd":"rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 c8f5","epd":"rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N5/PPP1PPPP/R2QKBNR w KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Boyce Defense","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Ne4","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 f6e4","epd":"rnbqkb1r/ppp1pppp/8/3p2B1/3Pn3/2N5/PPP1PPPP/R2QKBNR w KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Malich Gambit","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 c5 4. Bxf6 gxf6 5. e4 dxe4 6. d5","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 c7c5 g5f6 g7f6 e2e4 d5e4 d4d5","epd":"rnbqkb1r/pp2pp1p/5p2/2pP4/4p3/2N5/PPP2PPP/R2QKBNR b KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Richter Variation","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. f3","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 c8f5 f2f3","epd":"rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N2P2/PPP1P1PP/R2QKBNR b KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Two Knights System","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 b8d7 g1f3","epd":"r1bqkb1r/pppnpppp/5n2/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R b KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Two Knights System, Grünfeld Defense","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 g6","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 b8d7 g1f3 g7g6","epd":"r1bqkb1r/pppnpp1p/5np1/3p2B1/3P4/2N2N2/PPP1PPPP/R2QKB1R w KQkq -"},{"eco":"D01","name":"Richter-Veresov Attack: Veresov Variation","pgn":"1. d4 Nf6 2. Nc3 d5 3. Bg5 Bf5 4. Bxf6","uci":"d2d4 g8f6 b1c3 d7d5 c1g5 c8f5 g5f6","epd":"rn1qkb1r/ppp1pppp/5B2/3p1b2/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -"},{"eco":"D02","name":"London System: Poisoned Pawn Variation","pgn":"1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 Qb6 5. Nc3","uci":"d2d4 g8f6 g1f3 d7d5 c1f4 c7c5 e2e3 d8b6 b1c3","epd":"rnb1kb1r/pp2pppp/1q3n2/2pp4/3P1B2/2N1PN2/PPP2PPP/R2QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Gambit Declined: Baltic Defense, Pseudo-Slav","pgn":"1. d4 d5 2. Nf3 Bf5 3. c4 e6 4. Nc3 c6","uci":"d2d4 d7d5 g1f3 c8f5 c2c4 e7e6 b1c3 c7c6","epd":"rn1qkbnr/pp3ppp/2p1p3/3p1b2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Anti-Torre","pgn":"1. Nf3 d5 2. d4 Bg4","uci":"g1f3 d7d5 d2d4 c8g4","epd":"rn1qkbnr/ppp1pppp/8/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Chandler Gambit","pgn":"1. d4 d5 2. Nf3 c5 3. g3 cxd4 4. Bg2","uci":"d2d4 d7d5 g1f3 c7c5 g2g3 c5d4 f1g2","epd":"rnbqkbnr/pp2pppp/8/3p4/3p4/5NP1/PPP1PPBP/RNBQK2R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Chigorin Variation","pgn":"1. d4 d5 2. Nf3 Nc6","uci":"d2d4 d7d5 g1f3 b8c6","epd":"r1bqkbnr/ppp1pppp/2n5/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Krause Variation","pgn":"1. d4 d5 2. Nf3 c5","uci":"d2d4 d7d5 g1f3 c7c5","epd":"rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line","pgn":"1. d4 d5 2. Nf3 c6 3. Bg5 h6 4. Bh4 Qb6","uci":"d2d4 d7d5 g1f3 c7c6 c1g5 h7h6 g5h4 d8b6","epd":"rnb1kbnr/pp2ppp1/1qp4p/3p4/3P3B/5N2/PPP1PPPP/RN1QKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System","pgn":"1. d4 d5 2. Nf3 Nf6 3. Bf4","uci":"d2d4 d7d5 g1f3 g8f6 c1f4","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System","pgn":"1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3","uci":"d2d4 d7d5 g1f3 g8f6 c1f4 c7c5 e2e3","epd":"rnbqkb1r/pp2pppp/5n2/2pp4/3P1B2/4PN2/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System","pgn":"1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2","uci":"d2d4 d7d5 g1f3 g8f6 c1f4 c7c5 e2e3 b8c6 b1d2","epd":"r1bqkb1r/pp2pppp/2n2n2/2pp4/3P1B2/4PN2/PPPN1PPP/R2QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System","pgn":"1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. Nbd2 e6 6. c3","uci":"d2d4 d7d5 g1f3 g8f6 c1f4 c7c5 e2e3 b8c6 b1d2 e7e6 c2c3","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P1B2/2P1PN2/PP1N1PPP/R2QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System, Pterodactyl Variation","pgn":"1. d4 g6 2. Nf3 Bg7 3. Bf4 c5 4. c3 cxd4 5. cxd4 Qa5+","uci":"d2d4 g7g6 g1f3 f8g7 c1f4 c7c5 c2c3 c5d4 c3d4 d8a5","epd":"rnb1k1nr/pp1pppbp/6p1/q7/3P1B2/5N2/PP2PPPP/RN1QKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System, with e6","pgn":"1. d4 d5 2. Nf3 e6 3. Bf4","uci":"d2d4 d7d5 g1f3 e7e6 c1f4","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: London System, with e6","pgn":"1. d4 d5 2. Nf3 e6 3. Bf4 Nf6","uci":"d2d4 d7d5 g1f3 e7e6 c1f4 g8f6","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R w KQkq -"},{"eco":"D02","name":"Queen's Pawn Game: Symmetrical Variation","pgn":"1. d4 d5 2. 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Bg5 g6 4. e3","uci":"d2d4 d7d5 g1f3 g8f6 c1g5 g7g6 e2e3","epd":"rnbqkb1r/ppp1pp1p/5np1/3p2B1/3P4/4PN2/PPP2PPP/RN1QKB1R b KQkq -"},{"eco":"D04","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3","uci":"d2d4 d7d5 g1f3 g8f6 e2e3","epd":"rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -"},{"eco":"D04","name":"Queen's Pawn Game: Colle System, Anti-Colle","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 Bf5","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 c8f5","epd":"rn1qkb1r/ppp1pppp/5n2/3p1b2/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"D04","name":"Queen's Pawn Game: Colle System, Grünfeld Formation","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 g6 4. Bd3 Bg7","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 g7g6 f1d3 f8g7","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R w KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R b KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. b3","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 b2b3","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/1P2PN2/P1P2PPP/RNBQKB1R b KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. b3 c5 5. Bb2 Nc6","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 b2b3 c7c5 c1b2 b8c6","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/1P2PN2/PBP2PPP/RN1QKB1R w KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Colle System","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. b3 c5 5. Bb2 Nc6 6. 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Bd3 d5 5. c3","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 c2c3","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2PBPN2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"D05","name":"Queen's Pawn Game: Zukertort Variation","pgn":"1. d4 d5 2. Nf3 c5 3. e3 Nf6 4. Nbd2 e6 5. b3","uci":"d2d4 d7d5 g1f3 c7c5 e2e3 g8f6 b1d2 e7e6 b2b3","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P2PN2/P1PN1PPP/R1BQKB1R b KQkq -"},{"eco":"D05","name":"Rubinstein Opening","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P1BPN2/P1P2PPP/RNBQK2R b KQkq -"},{"eco":"D05","name":"Rubinstein Opening: Bogoljubow Defense","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Bd6 7. Bb2 O-O","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3 b8c6 e1g1 f8d6 c1b2 e8g8","epd":"r1bq1rk1/pp3ppp/2nbpn2/2pp4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 w - -"},{"eco":"D05","name":"Rubinstein Opening: Classical Defense","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3 c5 4. Bd3 d5 5. b3 Nc6 6. O-O Be7 7. Bb2 O-O","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 c7c5 f1d3 d7d5 b2b3 b8c6 e1g1 f8e7 c1b2 e8g8","epd":"r1bq1rk1/pp2bppp/2n1pn2/2pp4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 w - -"},{"eco":"D05","name":"Rubinstein Opening: Semi-Slav Defense","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3 f8d6 e1g1 e8g8 b2b3 b8d7 c1b2","epd":"r1bq1rk1/pppn1ppp/3bpn2/3p4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 b - -"},{"eco":"D05","name":"Rubinstein Opening: Semi-Slav Defense","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2 c6","uci":"d2d4 d7d5 g1f3 g8f6 e2e3 e7e6 f1d3 f8d6 e1g1 e8g8 b2b3 b8d7 c1b2 c7c6","epd":"r1bq1rk1/pp1n1ppp/2pbpn2/3p4/3P4/1P1BPN2/PBP2PPP/RN1Q1RK1 w - -"},{"eco":"D05","name":"Rubinstein Opening: Semi-Slav Defense","pgn":"1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. b3 Nbd7 7. Bb2 c6 8. 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Qa4+ c6 5. dxc6 Nxc6","uci":"d2d4 d7d5 c2c4 c8f5 c4d5 f5b1 d1a4 c7c6 d5c6 b8c6","epd":"r2qkbnr/pp2pppp/2n5/8/Q2P4/8/PP2PPPP/RbB1KBNR w KQkq -"},{"eco":"D06","name":"Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin","pgn":"1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Nf3 Nc6","uci":"d2d4 d7d5 c2c4 c8f5 b1c3 e7e6 g1f3 b8c6","epd":"r2qkbnr/ppp2ppp/2n1p3/3p1b2/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D06","name":"Queen's Gambit Declined: Baltic Defense, Queen Attack","pgn":"1. d4 d5 2. c4 Bf5 3. Qb3","uci":"d2d4 d7d5 c2c4 c8f5 d1b3","epd":"rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/1Q6/PP2PPPP/RNB1KBNR b KQkq -"},{"eco":"D06","name":"Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred","pgn":"1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. 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Nc3","uci":"d2d4 d7d5 c2c4 b8c6 b1c3","epd":"r1bqkbnr/ppp1pppp/2n5/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense","pgn":"1. d4 d5 2. c4 Nc6 3. Nc3 dxc4","uci":"d2d4 d7d5 c2c4 b8c6 b1c3 d5c4","epd":"r1bqkbnr/ppp1pppp/2n5/8/2pP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense","pgn":"1. d4 d5 2. c4 Nc6 3. Nc3 e6 4. Nf3 Nf6","uci":"d2d4 d7d5 c2c4 b8c6 b1c3 e7e6 g1f3 g8f6","epd":"r1bqkb1r/ppp2ppp/2n1pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense","pgn":"1. d4 d5 2. c4 Nc6 3. Nc3 e6 4. Nf3 Nf6 5. a3","uci":"d2d4 d7d5 c2c4 b8c6 b1c3 e7e6 g1f3 g8f6 a2a3","epd":"r1bqkb1r/ppp2ppp/2n1pn2/3p4/2PP4/P1N2N2/1P2PPPP/R1BQKB1R b KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense, Exchange Variation","pgn":"1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5","uci":"d2d4 d7d5 c2c4 b8c6 c4d5 d8d5","epd":"r1b1kbnr/ppp1pppp/2n5/3q4/3P4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line","pgn":"1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 4. e3 e5 5. Nc3 Bb4 6. Bd2 Bxc3 7. Bxc3 exd4 8. Ne2","uci":"d2d4 d7d5 c2c4 b8c6 c4d5 d8d5 e2e3 e7e5 b1c3 f8b4 c1d2 b4c3 d2c3 e5d4 g1e2","epd":"r1b1k1nr/ppp2ppp/2n5/3q4/3p4/2B1P3/PP2NPPP/R2QKB1R b KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense, Janowski Variation","pgn":"1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. 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Nf3 Nf6","uci":"d2d4 d7d5 c2c4 b8c6 b1c3 d5c4 g1f3 g8f6","epd":"r1bqkb1r/ppp1pppp/2n2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D07","name":"Queen's Gambit Declined: Chigorin Defense, Tartakower Gambit","pgn":"1. d4 d5 2. c4 Nc6 3. Nc3 e5","uci":"d2d4 d7d5 c2c4 b8c6 b1c3 e7e5","epd":"r1bqkbnr/ppp2ppp/2n5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit","pgn":"1. d4 d5 2. c4 e5","uci":"d2d4 d7d5 c2c4 e7e5","epd":"rnbqkbnr/ppp2ppp/8/3pp3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Balogh Variation","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 d8e7","epd":"r1b1kbnr/ppp1qppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Janowski Variation","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 f6","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 f7f6","epd":"r1bqkbnr/ppp3pp/2n2p2/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Krenosz Variation","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Bg4 6. h3 Bxf3 7. Nxf3 Bb4+ 8. Bd2 Qe7","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2 c8g4 h2h3 g4f3 d2f3 f8b4 c1d2 d8e7","epd":"r3k1nr/ppp1qppp/2n5/4P3/1bPp4/5N1P/PP1BPPP1/R2QKB1R w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Lasker Trap","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 e2e3 f8b4 c1d2 d4e3","epd":"rnbqk1nr/ppp2ppp/8/4P3/1bP5/4p3/PP1B1PPP/RN1QKBNR w KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Modern Line","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 b1d2","epd":"r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R b KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Normal Line","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3","epd":"rnbqkbnr/ppp2ppp/8/4P3/2Pp4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Spassky Variation","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. e4","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 e2e4","epd":"rnbqkbnr/ppp2ppp/8/4P3/2PpP3/8/PP3PPP/RNBQKBNR b KQkq e3"},{"eco":"D08","name":"Queen's Gambit Declined: Albin Countergambit, Tartakower Defense","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 c5","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 c7c5","epd":"rnbqkbnr/pp3ppp/8/2p1P3/2Pp4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D09","name":"Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3","epd":"r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R b KQkq -"},{"eco":"D09","name":"Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Be6","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8e6","epd":"r2qkbnr/ppp2ppp/2n1b3/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R w KQkq -"},{"eco":"D09","name":"Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bf5 Line","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bf5","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8f5","epd":"r2qkbnr/ppp2ppp/2n5/4Pb2/2Pp4/5NP1/PP2PP1P/RNBQKB1R w KQkq -"},{"eco":"D09","name":"Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bg4 Line","pgn":"1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. g3 Bg4","uci":"d2d4 d7d5 c2c4 e7e5 d4e5 d5d4 g1f3 b8c6 g2g3 c8g4","epd":"r2qkbnr/ppp2ppp/2n5/4P3/2Pp2b1/5NP1/PP2PP1P/RNBQKB1R w KQkq -"},{"eco":"D10","name":"Slav Defense","pgn":"1. d4 d5 2. c4 c6","uci":"d2d4 d7d5 c2c4 c7c6","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"D10","name":"Slav Defense","pgn":"1. d4 d5 2. c4 c6 3. Nc3","uci":"d2d4 d7d5 c2c4 c7c6 b1c3","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"D10","name":"Slav Defense","pgn":"1. d4 d5 2. c4 c6 3. Nc3 dxc4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 d5c4","epd":"rnbqkbnr/pp2pppp/2p5/8/2pP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D10","name":"Slav Defense: Diemer Gambit","pgn":"1. d4 d5 2. c4 c6 3. e4","uci":"d2d4 d7d5 c2c4 c7c6 e2e4","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"D10","name":"Slav Defense: Exchange Variation","pgn":"1. d4 d5 2. c4 c6 3. cxd5","uci":"d2d4 d7d5 c2c4 c7c6 c4d5","epd":"rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"D10","name":"Slav Defense: Exchange Variation, Boor Attack","pgn":"1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. f3","uci":"d2d4 d7d5 c2c4 c7c6 c4d5 c6d5 b1c3 g8f6 f2f3","epd":"rnbqkb1r/pp2pppp/5n2/3p4/3P4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"D10","name":"Slav Defense: Slav Gambit, Alekhine Attack","pgn":"1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 d5c4 e2e4","epd":"rnbqkbnr/pp2pppp/2p5/8/2pPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"D10","name":"Slav Defense: Winawer Countergambit","pgn":"1. d4 d5 2. c4 c6 3. Nc3 e5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 e7e5","epd":"rnbqkbnr/pp3ppp/2p5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D10","name":"Slav Defense: Winawer Countergambit, Anti-Winawer Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nc3 e5 4. e4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 e7e5 e2e4","epd":"rnbqkbnr/pp3ppp/2p5/3pp3/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"D11","name":"Slav Defense: Bonet Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Bg5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c1g5","epd":"rnbqkb1r/pp2pppp/2p2n2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq -"},{"eco":"D11","name":"Slav Defense: Breyer Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nbd2","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1d2","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -"},{"eco":"D11","name":"Slav Defense: Modern Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3","epd":"rnbqkbnr/pp2pppp/2p5/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"D11","name":"Slav Defense: Modern Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 dxc4 5. Bg2 g6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 g2g3 d5c4 f1g2 g7g6","epd":"rnbqkb1r/pp2pp1p/2p2np1/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"D11","name":"Slav Defense: Modern Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 Bg4 5. Bg2 e6 6. O-O","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 g2g3 c8g4 f1g2 e7e6 e1g1","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p4/2PP2b1/5NP1/PP2PPBP/RNBQ1RK1 b kq -"},{"eco":"D11","name":"Slav Defense: Modern Line","pgn":"1. d4 d5 2. Nf3 Nf6 3. g3 c6 4. Bg2 Bg4 5. O-O Nbd7 6. c4","uci":"d2d4 d7d5 g1f3 g8f6 g2g3 c7c6 f1g2 c8g4 e1g1 b8d7 c2c4","epd":"r2qkb1r/pp1npppp/2p2n2/3p4/2PP2b1/5NP1/PP2PPBP/RNBQ1RK1 b kq -"},{"eco":"D11","name":"Slav Defense: Quiet Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"D11","name":"Slav Defense: Quiet Variation, Pin Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8g4","epd":"rn1qkb1r/pp2pppp/2p2n2/3p4/2PP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D12","name":"Slav Defense: Quiet Variation, Amsterdam Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3 e6 7. Ne5 Nfd7","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3 e7e6 f3e5 f6d7","epd":"rn1qkb1r/pp1n1ppp/4p3/3pNb2/3P4/2N1P3/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D12","name":"Slav Defense: Quiet Variation, Landau Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Qc8 7. Bd2 e6 8. Na3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 d1b3 d8c8 c1d2 e7e6 b1a3","epd":"rnq1kb1r/pp3ppp/4pn2/3p1b2/3P4/NQ2PN2/PP1B1PPP/R3KB1R b KQkq -"},{"eco":"D12","name":"Slav Defense: Quiet Variation, Schallopp Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/3p1b2/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D12","name":"Slav Defense: Quiet Variation, Schallopp Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 b1c3 e7e6","epd":"rn1qkb1r/pp3ppp/2p1pn2/3p1b2/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D13","name":"Slav Defense: Exchange Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5","epd":"rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D13","name":"Slav Defense: Exchange Variation, Schallopp Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Nc3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 c8f5 c4d5 c6d5 b1c3","epd":"rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D14","name":"Slav Defense: Exchange Variation, Symmetrical Line","pgn":"1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5","uci":"d2d4 d7d5 c2c4 c7c6 c4d5 c6d5 b1c3 g8f6 g1f3 b8c6 c1f4 c8f5","epd":"r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D14","name":"Slav Defense: Exchange Variation, Trifunovic Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Qb3 Bb4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 c4d5 c6d5 b1c3 b8c6 c1f4 c8f5 e2e3 e7e6 d1b3 f8b4","epd":"r2qk2r/pp3ppp/2n1pn2/3p1b2/1b1P1B2/1QN1PN2/PP3PPP/R3KB1R w KQkq -"},{"eco":"D15","name":"Slav Defense: Alekhine Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e3","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D15","name":"Slav Defense: Chebanenko Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 a7a6","epd":"rnbqkb1r/1p2pppp/p1p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D15","name":"Slav Defense: Chebanenko Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. e3 Bf5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 a7a6 e2e3 c8f5","epd":"rn1qkb1r/1p2pppp/p1p2n2/3p1b2/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D15","name":"Slav Defense: Chebanenko Variation, Advance System","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 a7a6 c4c5","epd":"rnbqkb1r/1p2pppp/p1p2n2/2Pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D15","name":"Slav Defense: Geller Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D15","name":"Slav Defense: Geller Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 e2e4 b7b5 e4e5","epd":"rnbqkb1r/p3pppp/2p2n2/1p2P3/2pP4/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D15","name":"Slav Defense: Schlechter Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 g6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 g7g6","epd":"rnbqkb1r/pp2pp1p/2p2np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D15","name":"Slav Defense: Süchting Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Qb6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d8b6","epd":"rnb1kb1r/pp2pppp/1qp2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D15","name":"Slav Defense: Three Knights Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3","epd":"rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D15","name":"Slav Defense: Two Knights Attack","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D16","name":"Slav Defense: Alapin Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R b KQkq -"},{"eco":"D16","name":"Slav Defense: Smyslov Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Na6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 b8a6","epd":"r1bqkb1r/pp2pppp/n1p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"D16","name":"Slav Defense: Soultanbeieff Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 e7e6","epd":"rnbqkb1r/pp3ppp/2p1pn2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"D16","name":"Slav Defense: Steiner Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bg4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8g4","epd":"rn1qkb1r/pp2pppp/2p2n2/8/P1pP2b1/2N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5","epd":"rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Bled Attack","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Nh4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3h4","epd":"rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP3N/2N5/1P2PPPP/R1BQKB1R b KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Carlsbad Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8d7 e5c4 d8c7 g2g3 e7e5","epd":"r3kb1r/ppqn1ppp/2p2n2/4pb2/P1NP4/2N3P1/1P2PP1P/R1BQKB1R w KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Bg2 g5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8d7 e5c4 d8c7 g2g3 e7e5 d4e5 d7e5 c1f4 f6d7 f1g2 g7g5","epd":"r3kb1r/ppqn1p1p/2p5/4nbp1/P1N2B2/2N3P1/1P2PPBP/R2QK2R w KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Krause Attack","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5","epd":"rn1qkb1r/pp2pppp/2p2n2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R b KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Krause Attack, Fazekas Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Na6 7. e4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 b8a6 e2e4","epd":"r2qkb1r/pp2pppp/n1p2n2/4Nb2/P1pPP3/2N5/1P3PPP/R1BQKB1R b KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Wiesbaden Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 e7e6","epd":"rn1qkb1r/pp3ppp/2p1pn2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"D17","name":"Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. f3 Bb4 8. e4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 f3e5 e7e6 f2f3 f8b4 e2e4","epd":"rn1qk2r/pp3ppp/2p1pn2/4Nb2/PbpPP3/2N2P2/1P4PP/R1BQKB1R b KQkq -"},{"eco":"D18","name":"Slav Defense: Czech Variation, Classical System","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3","epd":"rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R b KQkq -"},{"eco":"D18","name":"Slav Defense: Czech Variation, Lasker Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 Na6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 b8a6","epd":"r2qkb1r/pp2pppp/n1p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R w KQkq -"},{"eco":"D19","name":"Slav Defense: Czech Variation, Classical System, Main Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2","epd":"rn1q1rk1/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P2QPPP/R1B2RK1 b - -"},{"eco":"D19","name":"Slav Defense: Czech Variation, Dutch Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1","epd":"rn1qk2r/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P3PPP/R1BQ1RK1 b kq -"},{"eco":"D19","name":"Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O O-O 9. Qe2 Ne4 10. g4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 d5c4 a2a4 c8f5 e2e3 e7e6 f1c4 f8b4 e1g1 e8g8 d1e2 f6e4 g2g4","epd":"rn1q1rk1/pp3ppp/2p1p3/5b2/PbBPn1P1/2N1PN2/1P2QP1P/R1B2RK1 b - -"},{"eco":"D20","name":"Queen's Gambit Accepted","pgn":"1. d4 d5 2. c4 dxc4","uci":"d2d4 d7d5 c2c4 d5c4","epd":"rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Accelerated Mannheim Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Qa4+","uci":"d2d4 d7d5 c2c4 d5c4 d1a4","epd":"rnbqkbnr/ppp1pppp/8/8/Q1pP4/8/PP2PPPP/RNB1KBNR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, Alekhine System","pgn":"1. d4 d5 2. c4 dxc4 3. e4 Nf6","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/8/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, Greco Variation","pgn":"1. d4 d5 2. c4 dxc4 3. e4 b5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 b7b5","epd":"rnbqkbnr/p1p1pppp/8/1p6/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, McDonnell Defense","pgn":"1. d4 d5 2. c4 dxc4 3. e4 e5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 e7e5","epd":"rnbqkbnr/ppp2ppp/8/4p3/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e4 e5 4. Bxc4","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 e7e5 f1c4","epd":"rnbqkbnr/ppp2ppp/8/4p3/2BPP3/8/PP3PPP/RNBQK1NR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, Modern Defense","pgn":"1. d4 d5 2. c4 dxc4 3. e4 Nc6","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 b8c6","epd":"r1bqkbnr/ppp1pppp/2n5/8/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, Rubinstein Defense","pgn":"1. d4 d5 2. c4 dxc4 3. e4 c5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 c7c5","epd":"rnbqkbnr/pp2pppp/8/2p5/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 b5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 c7c5 d4d5 b7b5","epd":"rnbqkbnr/p3pppp/8/1ppP4/2p1P3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Linares Variation","pgn":"1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 c7c5 d4d5 g8f6 b1c3 b7b5","epd":"rnbqkb1r/p3pppp/5n2/1ppP4/2p1P3/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Old Variation","pgn":"1. d4 d5 2. c4 dxc4 3. e3","uci":"d2d4 d7d5 c2c4 d5c4 e2e3","epd":"rnbqkbnr/ppp1pppp/8/8/2pP4/4P3/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Old Variation, Billinger Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. a3","uci":"d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 a2a3","epd":"rnb1kbnr/ppp1qppp/8/8/2Bp4/PQ2P3/1P3PPP/RNB1K1NR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Old Variation, Christensen Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nf3","uci":"d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 g1f3","epd":"rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2PN2/PP3PPP/RNB1K2R b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Old Variation, Korchnoi Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Kf1","uci":"d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 e1f1","epd":"rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2P3/PP3PPP/RNB2KNR b kq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Old Variation, Novikov Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. Qb3 Qe7 6. Nd2","uci":"d2d4 d7d5 c2c4 d5c4 e2e3 e7e5 f1c4 e5d4 d1b3 d8e7 b1d2","epd":"rnb1kbnr/ppp1qppp/8/8/2Bp4/1Q2P3/PP1N1PPP/R1B1K1NR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Saduleto Variation","pgn":"1. d4 d5 2. c4 dxc4 3. e4","uci":"d2d4 d7d5 c2c4 d5c4 e2e4","epd":"rnbqkbnr/ppp1pppp/8/8/2pPP3/8/PP3PPP/RNBQKBNR b KQkq -"},{"eco":"D20","name":"Queen's Gambit Accepted: Schwartz Defense","pgn":"1. d4 d5 2. c4 dxc4 3. e4 f5","uci":"d2d4 d7d5 c2c4 d5c4 e2e4 f7f5","epd":"rnbqkbnr/ppp1p1pp/8/5p2/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e4","epd":"rnbqkbnr/1pp1pppp/p7/8/2pPP3/5N2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Godes Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nd7","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 b8d7","epd":"r1bqkbnr/pppnpppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Gunsberg Defense","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 c5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 c7c5","epd":"rnbqkbnr/pp2pppp/8/2p5/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Normal Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3","epd":"rnbqkbnr/ppp1pppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Rosenthal Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 e6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 e7e6","epd":"rnbqkbnr/ppp2ppp/4p3/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D21","name":"Queen's Gambit Accepted: Slav Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 b5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 b7b5","epd":"rnbqkbnr/p1p1pppp/8/1p6/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D22","name":"Queen's Gambit Accepted: Alekhine Defense","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 a6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 a7a6","epd":"rnbqkbnr/1pp1pppp/p7/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D22","name":"Queen's Gambit Accepted: Alekhine Defense, Alatortsev Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 Bg4 5. Bxc4 e6 6. d5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 c8g4 f1c4 e7e6 d4d5","epd":"rn1qkbnr/1pp2ppp/p3p3/3P4/2B3b1/4PN2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"D22","name":"Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 a7a6 e2e3 b7b5","epd":"rnbqkbnr/2p1pppp/p7/1p6/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D23","name":"Queen's Gambit Accepted","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6","epd":"rnbqkb1r/ppp1pppp/5n2/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D23","name":"Queen's Gambit Accepted: Mannheim Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 d1a4","epd":"rnbqkb1r/ppp1pppp/5n2/8/Q1pP4/5N2/PP2PPPP/RNB1KB1R b KQkq -"},{"eco":"D23","name":"Queen's Gambit Accepted: Mannheim Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+ c6 5. Qxc4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 d1a4 c7c6 a4c4","epd":"rnbqkb1r/pp2pppp/2p2n2/8/2QP4/5N2/PP2PPPP/RNB1KB1R b KQkq -"},{"eco":"D23","name":"Queen's Gambit Accepted: Mannheim Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+ c6 5. Qxc4 e6 6. Qc2","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 d1a4 c7c6 a4c4 e7e6 c4c2","epd":"rnbqkb1r/pp3ppp/2p1pn2/8/3P4/5N2/PPQ1PPPP/RNB1KB1R b KQkq -"},{"eco":"D24","name":"Queen's Gambit Accepted","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 d5c4 e2e4","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D24","name":"Queen's Gambit Accepted","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 d5c4 c1g5","epd":"rnbqkb1r/ppp2ppp/4pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D24","name":"Queen's Gambit Accepted: Bogoljubow Defense","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3 a7a6 e2e4","epd":"rnbqkb1r/1pp1pppp/p4n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D24","name":"Queen's Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 c5 5. d5 e6 6. e4 exd5 7. e5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3 c7c5 d4d5 e7e6 e2e4 e6d5 e4e5","epd":"rnbqkb1r/pp3ppp/5n2/2ppP3/2p5/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D24","name":"Queen's Gambit Accepted: Showalter Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 b1c3","epd":"rnbqkb1r/ppp1pppp/5n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D25","name":"Queen's Gambit Accepted: Janowski-Larsen Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8g4","epd":"rn1qkb1r/ppp1pppp/5n2/8/2pP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D25","name":"Queen's Gambit Accepted: Normal Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3","epd":"rnbqkb1r/ppp1pppp/5n2/8/2pP4/4PN2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"D25","name":"Queen's Gambit Accepted: Smyslov Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 g7g6","epd":"rnbqkb1r/ppp1pp1p/5np1/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D25","name":"Queen's Gambit Accepted: Winawer Defense","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 c8e6","epd":"rn1qkb1r/ppp1pppp/4bn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Classical Defense","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5","epd":"rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQK2R w KQkq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Classical Defense, Normal Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1","epd":"rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O Nc6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 b8c6","epd":"r1bqkb1r/pp3ppp/2n1pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O cxd4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 c5d4","epd":"rnbqkb1r/pp3ppp/4pn2/8/2Bp4/4PN2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Classical, Furman Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. Qe2 a6 7. dxc5 Bxc5 8. O-O Nc6 9. e4 b5 10. e5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 d1e2 a7a6 d4c5 f8c5 e1g1 b8c6 e3e4 b7b5 e4e5","epd":"r1bqk2r/5ppp/p1n1pn2/1pb1P3/2B5/5N2/PP2QPPP/RNB2RK1 b kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, .. a6 Sideline","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. Nc3 b5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 a7a6 b1c3 b7b5","epd":"rnbqkb1r/2p2ppp/p3pn2/1p6/2BP4/2N1PN2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, .. a6 Sideline","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. Nc3 b5 7. Bb3 Bb7 8. O-O","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 a7a6 b1c3 b7b5 c4b3 c8b7 e1g1","epd":"rn1qkb1r/1bp2ppp/p3pn2/1p6/3P4/1BN1PN2/PP3PPP/R1BQ1RK1 b kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, Traditional System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, Traditional System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 Be7 6. O-O a6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 f8e7 e1g1 a7a6","epd":"rnbqk2r/1pp1bppp/p3pn2/8/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, Traditional System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 Be7 6. O-O O-O","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 f8e7 e1g1 e8g8","epd":"rnbq1rk1/ppp1bppp/4pn2/8/2BP4/4PN2/PP3PPP/RNBQ1RK1 w - -"},{"eco":"D26","name":"Queen's Gambit Accepted: Normal Variation, Traditional System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 Be7 6. O-O O-O 7. Nc3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 f8e7 e1g1 e8g8 b1c3","epd":"rnbq1rk1/ppp1bppp/4pn2/8/2BP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Main Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6","epd":"rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Main Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Nc3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 b1c3","epd":"rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/2N1PN2/PP3PPP/R1BQ1RK1 b kq -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Main Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. Nc3 b5 7. Bb3 Bb7 8. O-O c5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 a7a6 b1c3 b7b5 c4b3 c8b7 e1g1 c7c5","epd":"rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1BN1PN2/PP3PPP/R1BQ1RK1 w kq -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. a4","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 a2a4","epd":"rnbqkb1r/1p3ppp/p3pn2/2p5/P1BP4/4PN2/1P3PPP/RNBQ1RK1 b kq -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 e6 4. e3 Nf6 5. Bxc4 Be7 6. O-O O-O 7. Nc3 a6 8. a4 c5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 e7e6 e2e3 g8f6 f1c4 f8e7 e1g1 e8g8 b1c3 a7a6 a2a4 c7c5","epd":"rnbq1rk1/1p2bppp/p3pn2/2p5/P1BP4/2N1PN2/1P3PPP/R1BQ1RK1 w - -"},{"eco":"D27","name":"Queen's Gambit Accepted: Classical Defense, Russian Gambit","pgn":"1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. O-O a6 7. e4","uci":"d2d4 d7d5 c2c4 d5c4 e2e3 g8f6 f1c4 e7e6 g1f3 c7c5 e1g1 a7a6 e3e4","epd":"rnbqkb1r/1p3ppp/p3pn2/2p5/2BPP3/5N2/PP3PPP/RNBQ1RK1 b kq -"},{"eco":"D27","name":"Queen's Gambit Accepted: Furman Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d4c5 f8c5","epd":"rnbqk2r/1p3ppp/p3pn2/2b5/2B5/4PN2/PP3PPP/RNBQ1RK1 w kq -"},{"eco":"D28","name":"Queen's Gambit Accepted: Classical Defense, Alekhine System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2","epd":"rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP2QPPP/RNB2RK1 b kq -"},{"eco":"D28","name":"Queen's Gambit Accepted: Classical Defense, Alekhine System","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5","epd":"rnbqkb1r/5ppp/p3pn2/1pp5/2BP4/4PN2/PP2QPPP/RNB2RK1 w kq -"},{"eco":"D28","name":"Queen's Gambit Accepted: Classical, Flohr Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Nc6 9. Rd1 c4 10. Bc2 Nb4 11. Nc3 Nxc2 12. Qxc2 Bb7 13. d5 Qc7","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 b8c6 f1d1 c5c4 b3c2 c6b4 b1c3 b4c2 e2c2 c8b7 d4d5 d8c7","epd":"r3kb1r/1bq2ppp/p3pn2/1p1P4/2p5/2N1PN2/PPQ2PPP/R1BR2K1 w kq -"},{"eco":"D29","name":"Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7","epd":"rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1B2PN2/PP2QPPP/RNB2RK1 w kq -"},{"eco":"D29","name":"Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Nc3","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7 b1c3","epd":"rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1BN1PN2/PP2QPPP/R1B2RK1 b kq -"},{"eco":"D29","name":"Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation","pgn":"1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Qe2 b5 8. Bb3 Bb7 9. Rd1 Nbd7 10. Nc3 Bd6","uci":"d2d4 d7d5 c2c4 d5c4 g1f3 g8f6 e2e3 e7e6 f1c4 c7c5 e1g1 a7a6 d1e2 b7b5 c4b3 c8b7 f1d1 b8d7 b1c3 f8d6","epd":"r2qk2r/1b1n1ppp/p2bpn2/1pp5/3P4/1BN1PN2/PP2QPPP/R1BR2K1 w kq -"},{"eco":"D30","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6","uci":"d2d4 d7d5 c2c4 e7e6","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nf3 c6 4. Qc2 dxc4 5. Qxc4 Nf6 6. g3","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 c7c6 d1c2 d5c4 c2c4 g8f6 g2g3","epd":"rnbqkb1r/pp3ppp/2p1pn2/8/2QP4/5NP1/PP2PP1P/RNB1KB1R b KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 h6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5 h7h6","epd":"rnbqkb1r/ppp2pp1/4pn1p/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Capablanca Variation","pgn":"1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. Bg5 c6 5. Nbd2 Nbd7 6. e3","uci":"d2d4 g8f6 g1f3 e7e6 c2c4 d7d5 c1g5 c7c6 b1d2 b8d7 e2e3","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/4PN2/PP1N1PPP/R2QKB1R b KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Semmering Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7 6. Bd3 c5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 b8d7 f1d3 c6c5","epd":"r1bqkb1r/pp1n1ppp/4pn2/2pp4/2PP4/3BPN2/PP1N1PPP/R1BQK2R w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Spielmann Variation","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 c6 5. Nbd2 g6","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 e2e3 c7c6 b1d2 g7g6","epd":"rnbqkb1r/pp3p1p/2p1pnp1/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Stonewall Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Ne4 6. Bd3 f5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 f6e4 f1d3 f7f5","epd":"rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/3BPN2/PP1N1PPP/R1BQK2R w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch","pgn":"1. d4 d5 2. c4 e6 3. Nf3 c5","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 c7c5","epd":"rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack","pgn":"1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 c7c5 c4d5 e6d5 c1g5","epd":"rnbqkbnr/pp3ppp/8/2pp2B1/3P4/5N2/PP2PPPP/RN1QKB1R b KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5","epd":"rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 dxc4 5. Qa4+ c6 6. Qxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5 d5c4 d1a4 c7c6 a4c4","epd":"rnbqkb1r/pp3ppp/2p1pn2/6B1/2QP4/5N2/PP2PPPP/RN2KB1R b KQkq -"},{"eco":"D30","name":"Queen's Gambit Declined: Vienna Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Bb4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 c1g5 f8b4","epd":"rnbqk2r/ppp2ppp/4pn2/3p2B1/1bPP4/5N2/PP2PPPP/RN1QKB1R w KQkq -"},{"eco":"D30","name":"Semi-Slav Defense: Quiet Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2","epd":"rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq -"},{"eco":"D30","name":"Semi-Slav Defense: Quiet Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 e2e3 e7e6 b1d2 b8d7","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Alapin Variation","pgn":"1. d4 e6 2. c4 b6 3. Nc3 d5","uci":"d2d4 e7e6 c2c4 b7b6 b1c3 d7d5","epd":"rnbqkbnr/p1p2ppp/1p2p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Charousek Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7","epd":"rnbqk1nr/ppp1bppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Charousek Variation, Miladinovic Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. e4 dxe4 5. f3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 e2e4 d5e4 f2f3","epd":"rnbqk1nr/ppp1bppp/4p3/8/2PPp3/2N2P2/PP4PP/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Janowski Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 a6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 a7a6","epd":"rnbqkbnr/1pp2ppp/p3p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Queen's Knight Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3","epd":"rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Semi-Slav, Abrahams Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 a5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 a7a5","epd":"rnbqk1nr/5ppp/2p1p3/pp6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Semi-Slav, Junge Variation","pgn":"1. d4 d5 2. c4 e6 3. Nf3 c6 4. Nc3 dxc4 5. a4 Bb4 6. e3 b5 7. Bd2 Qb6","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 c7c6 b1c3 d5c4 a2a4 f8b4 e2e3 b7b5 c1d2 d8b6","epd":"rnb1k1nr/p4ppp/1qp1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -"},{"eco":"D31","name":"Queen's Gambit Declined: Semi-Slav, Koomen Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 Qe7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 e2e3 b7b5 a2a4 f8b4 c1d2 d8e7","epd":"rnb1k1nr/p3qppp/2p1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Accelerated Move Order","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6","epd":"rnbqkbnr/pp3ppp/2p1p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Anti-Noteboom, Stonewall Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 f7f5","epd":"rnbqkbnr/pp4pp/2p1p3/3p1p2/2PP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 f5 5. g4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 f7f5 g2g4","epd":"rnbqkbnr/pp4pp/2p1p3/3p1p2/2PP2P1/2N1P3/PP3P1P/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Gunderam Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. f3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 f2f3","epd":"rnbqkbnr/pp3ppp/2p1p3/8/2PPp3/2N2P2/PP4PP/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Marshall Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4","epd":"rnbqkbnr/pp3ppp/2p1p3/3p4/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Marshall Gambit, Forgotten Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Nc3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 e4c3","epd":"rnbqk1nr/pp3ppp/2p1p3/8/1bPP4/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Marshall Gambit, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 c1d2","epd":"rnbqk1nr/pp3ppp/2p1p3/8/1bPPN3/8/PP1B1PPP/R2QKBNR b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Marshall Gambit, Tolush Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e4 dxe4 5. Nxe4 Bb4+ 6. Bd2 Qxd4 7. Bxb4 Qxe4+ 8. Be2 c5 9. Bxc5 Qxg2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e4 d5e4 c3e4 f8b4 c1d2 d8d4 d2b4 d4e4 f1e2 c6c5 b4c5 e4g2","epd":"rnb1k1nr/pp3ppp/4p3/2B5/2P5/8/PP2BPqP/R2QK1NR w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Noteboom Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4","epd":"rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Noteboom Variation, Abrahams Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e3 Bxc3+ 7. bxc3 b5 8. axb5 cxb5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 a2a4 f8b4 e2e3 b4c3 b2c3 b7b5 a4b5 c6b5","epd":"rnbqk1nr/p4ppp/4p3/1p6/2pP4/2P1PN2/5PPP/R1BQKB1R w KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. g3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 g2g3","epd":"rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 c1g5","epd":"rnbqkbnr/pp3ppp/2p1p3/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D31","name":"Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. Bg5 f6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 d5c4 c1g5 f7f6","epd":"rnbqkbnr/pp4pp/2p1pp2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D32","name":"Queen's Gambit Declined: Tarrasch Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5","epd":"rnbqkbnr/pp3ppp/8/2pp4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D32","name":"Queen's Gambit Declined: Tarrasch Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. Bg5 Be7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 c1g5 f8e7","epd":"r1bqk1nr/pp2bppp/2n5/2pp2B1/3P4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D32","name":"Queen's Gambit Declined: Tarrasch Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. Bg5 Be7 7. Bxe7 Ngxe7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 c1g5 f8e7 g5e7 g8e7","epd":"r1bqk2r/pp2nppp/2n5/2pp4/3P4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D32","name":"Queen's Gambit Declined: Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c5 5. cxd5 exd5 6. Nc3 a6 7. Be2 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 e2e3 c7c5 c4d5 e6d5 b1c3 a7a6 f1e2 b8c6","epd":"r1bqkb1r/1p3ppp/p1n2n2/2pp4/3P4/2N1PN2/PP2BPPP/R1BQK2R w KQkq -"},{"eco":"D32","name":"Tarrasch Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5","epd":"rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D32","name":"Tarrasch Defense: Grünfeld Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. dxc5 d4 7. Na4 b5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 d4c5 d5d4 c3a4 b7b5","epd":"r1bqkbnr/p4ppp/2n5/1pP5/N2p4/5N2/PP2PPPP/R1BQKB1R w KQkq b6"},{"eco":"D32","name":"Tarrasch Defense: Marshall Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. e4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 e2e4","epd":"rnbqkbnr/pp3ppp/8/2pp4/3PP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"D32","name":"Tarrasch Defense: Schara Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 c5d4","epd":"rnbqkbnr/pp3ppp/4p3/3P4/3p4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D32","name":"Tarrasch Defense: Symmetrical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. e3 Nf6 5. Nf3 Nc6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 e2e3 g8f6 g1f3 b8c6","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D32","name":"Tarrasch Defense: Symmetrical Variation","pgn":"1. c4 c5 2. Nf3 Nc6 3. Nc3 Nf6 4. e3 e6 5. d4 d5 6. cxd5 exd5","uci":"c2c4 c7c5 g1f3 b8c6 b1c3 g8f6 e2e3 e7e6 d2d4 d7d5 c4d5 e6d5","epd":"r1bqkb1r/pp3ppp/2n2n2/2pp4/3P4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D32","name":"Tarrasch Defense: Tarrasch Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. dxc5 d4 6. Na4 b5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 d4c5 d5d4 c3a4 b7b5","epd":"rnbqkbnr/p4ppp/8/1pP5/N2p4/8/PP2PPPP/R1BQKBNR w KQkq b6"},{"eco":"D32","name":"Tarrasch Defense: Two Knights Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3","epd":"rnbqkbnr/pp3ppp/8/2pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D32","name":"Tarrasch Defense: von Hennig Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd1 exd5 7. Qxd5 Be6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 c5d4 d1d4 b8c6 d4d1 e6d5 d1d5 c8e6","epd":"r2qkbnr/pp3ppp/2n1b3/3Q4/8/2N5/PP2PPPP/R1B1KBNR w KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Dubov Tarrasch","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 cxd4 8. Nxd4 Bc5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 c5d4 f3d4 f8c5","epd":"r1bqk2r/pp3ppp/2n2n2/2bp4/3N4/2N3P1/PP2PPBP/R1BQK2R w KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Prague Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6","epd":"r1bqkb1r/pp3ppp/2n2n2/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Rubinstein System","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3","epd":"r1bqkbnr/pp3ppp/2n5/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Swedish Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4","epd":"r1bqkbnr/pp3ppp/2n5/3p4/2pP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Swedish Variation, Central Break","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 c4 7. e4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 c5c4 e2e4","epd":"r1bqkbnr/pp3ppp/2n5/3p4/2pPP3/2N2NP1/PP3P1P/R1BQKB1R b KQkq -"},{"eco":"D33","name":"Tarrasch Defense: Wagner Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Bg4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 c8g4","epd":"r2qkb1r/pp3ppp/2n2n2/2pp4/3P2b1/2N2NP1/PP2PPBP/R1BQK2R w KQkq -"},{"eco":"D34","name":"Queen's Gambit Declined: Tarrasch Defense, Stoltz Variation","pgn":"1. d4 d5 2. c4 e6 3. Nf3 c5 4. cxd5 exd5 5. g3 Nc6 6. Bg2 Nf6 7. O-O Be7 8. Nc3 O-O 9. Bg5 Be6 10. Rc1 b6","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 c7c5 c4d5 e6d5 g2g3 b8c6 f1g2 g8f6 e1g1 f8e7 b1c3 e8g8 c1g5 c8e6 a1c1 b7b6","epd":"r2q1rk1/p3bppp/1pn1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/2RQ1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8","epd":"r1bq1rk1/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Advance Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 c4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5c4","epd":"r1bq1rk1/pp2bppp/2n2n2/3p2B1/2pP4/2N2NP1/PP2PPBP/R2Q1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Bogoljubow Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. Nf3 d5 5. cxd5 exd5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6 10. Rc1 c4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 c7c5 g1f3 d7d5 c4d5 e6d5 g2g3 b8c6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6 a1c1 c5c4","epd":"r2q1rk1/pp2bppp/2n1bn2/3p2B1/2pP4/2N2NP1/PP2PPBP/2RQ1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Carlsbad Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5","epd":"r1bq1rk1/pp2bppp/2n2n2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 b - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Chandler Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8 12. Rc1 Be6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 f8e8 a1c1 c8e6","epd":"r2qr1k1/pp2bpp1/2n1bn1p/3p4/3N4/2N1B1P1/PP2PPBP/2RQ1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Classical Tarrasch Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 d4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 d4c5 d5d4","epd":"r1bq1rk1/pp2bppp/2n2n2/2P5/3p4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Endgame Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 Be6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c8e6","epd":"r2q1rk1/pp2bppp/2n1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Re8","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 f8e8","epd":"r1bqr1k1/pp2bpp1/2n2n1p/3p4/3N4/2N1B1P1/PP2PPBP/R2Q1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Petursson Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 Re8","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 f8e8","epd":"r1bqr1k1/pp2bppp/2n2n2/3p2B1/3N4/2N3P1/PP2PPBP/R2Q1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Réti Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5 10. Na4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 d4c5 e7c5 c3a4","epd":"r1bq1rk1/pp3ppp/2n2n2/2bp4/N7/5NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"D34","name":"Tarrasch Defense: Classical Variation, Spassky Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Be3 Bg4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7 e1g1 e8g8 c1g5 c5d4 f3d4 h7h6 g5e3 c8g4","epd":"r2q1rk1/pp2bpp1/2n2n1p/3p4/3N2b1/2N1B1P1/PP2PPBP/R2Q1RK1 w - -"},{"eco":"D34","name":"Tarrasch Defense: Prague Variation, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c5 c4d5 e6d5 g1f3 b8c6 g2g3 g8f6 f1g2 f8e7","epd":"r1bqk2r/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQK2R w KQkq -"},{"eco":"D35","name":"Queen's Gambit Declined: Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c4d5","epd":"rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"D35","name":"Queen's Gambit Declined: Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 b6 5. Nc3 Bd6 6. cxd5 exd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 e2e3 b7b6 b1c3 f8d6 c4d5 e6d5","epd":"rnbqk2r/p1p2ppp/1p1b1n2/3p4/3P4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D35","name":"Queen's Gambit Declined: Exchange Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. e3 Be7 5. cxd5 exd5 6. Bd3 O-O 7. Nf3 c6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 e2e3 f8e7 c4d5 e6d5 f1d3 e8g8 g1f3 c7c6","epd":"rnbq1rk1/pp2bppp/2p2n2/3p4/3P4/2NBPN2/PP3PPP/R1BQK2R w KQ -"},{"eco":"D35","name":"Queen's Gambit Declined: Exchange Variation","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Nc6 5. cxd5 exd5 6. 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Rd1 Qa5 10. a3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5 d1c2 b8c6 a1d1 d8a5 a2a3","epd":"r1b2rk1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R b K -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. O-O-O","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5 d1c2 b8c6 a2a3 d8a5 e1c1","epd":"r1b2rk1/pp3ppp/2n1pn2/q1bp4/2P2B2/P1N1PN2/1PQ2PPP/2KR1B1R b - -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1f4 e8g8 e2e3 b7b6","epd":"rnbq1rk1/p1p1bppp/1p2pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 c7c5 d4c5 e7c5","epd":"rnbq1rk1/pp3ppp/4pn2/2bp4/2P2B2/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8e7 c1f4 e8g8 e2e3 c7c6","epd":"rnbq1rk1/pp2bppp/2p1pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1f4 e8g8 e2e3 b8d7","epd":"r1bq1rk1/pppnbppp/4pn2/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D37","name":"Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. 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Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D37","name":"Queen's Gambit Declined: Three Knights Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. e3 O-O","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 f8e7 e2e3 e8g8","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQ -"},{"eco":"D37","name":"Queen's Gambit Declined: Three Knights, Vienna Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 d5c4","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D37","name":"Queen's Gambit Declined: Vienna Variation, Quiet Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 d5c4 e2e3","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D38","name":"Queen's Gambit Declined: Ragozin Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4","epd":"rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D38","name":"Queen's Gambit Declined: Ragozin Defense, Alekhine Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 d1a4","epd":"rnbqk2r/ppp2ppp/4pn2/3p4/QbPP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq -"},{"eco":"D38","name":"Queen's Gambit Declined: Westphalian Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 Nbd7 6. e3 c5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 c1g5 b8d7 e2e3 c7c5","epd":"r1bqk2r/pp1n1ppp/4pn2/2pp2B1/1bPP4/2N1PN2/PP3PPP/R2QKB1R w KQkq -"},{"eco":"D39","name":"Queen's Gambit Declined: Ragozin Defense, Vienna Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8b4 c1g5 d5c4","epd":"rnbqk2r/ppp2ppp/4pn2/6B1/1bpP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5","epd":"rnbqkb1r/pp3ppp/4pn2/2pp4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Bd6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 a2a3 c5d4 e3d4 f8d6","epd":"r1bqk2r/pp3ppp/2nbpn2/3p4/2PP4/P1N2N2/1P3PPP/R1BQKB1R w KQkq -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8 d1e2 d8e7 d4c5 d6c5 e3e4","epd":"r1b2rk1/pp2qppp/2n1pn2/2bp4/2P1P3/2NB1N2/PP2QPPP/R1B2RK1 b - -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c1g5","epd":"rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 e2e3 b8c6 f1d3 f8d6 e1g1 e8g8","epd":"r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"D40","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, with e3","pgn":"1. d4 d5 2. c4 c5 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nc6 6. Bd3","uci":"d2d4 d7d5 c2c4 c7c5 g1f3 g8f6 b1c3 e7e6 e2e3 b8c6 f1d3","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 d5 5. d4 e6","uci":"c2c4 c7c5 g1f3 g8f6 b1c3 b8c6 g2g3 d7d5 d2d4 e7e6","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5","epd":"rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. g3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 g2g3","epd":"rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. g3 Nc6 7. Bg2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 g2g3 b8c6 f1g2","epd":"r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2N2NP1/PP2PPBP/R1BQK2R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Endgame Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 dxe4 8. Qxd8+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 c5d4 d1d4 e6d5 e2e4 d5e4 d4d8","epd":"rnbQkb1r/pp3ppp/5n2/8/4p3/2N2N2/PP3PPP/R1B1KB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e4","epd":"rnbqkb1r/pp3ppp/4p3/2pn4/3PP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e4 d5c3 b2c3","epd":"rnbqkb1r/pp3ppp/4p3/2p5/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bb5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 g1f3 c7c5 c4d5 f6d5 e2e4 d5c3 b2c3 c5d4 c3d4 f8b4 c1d2 b4d2 d1d2 e8g8 f1b5","epd":"rnbq1rk1/pp3ppp/4p3/1B6/3PP3/5N2/P2Q1PPP/R3K2R b KQ -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e3","epd":"rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D41","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 g1f3 c5d4 c3d4 f8b4 c1d2 d8a5","epd":"rnb1k2r/pp3ppp/4p3/q7/1b1PP3/5N2/P2B1PPP/R2QKB1R w KQkq -"},{"eco":"D42","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c5 c4d5 f6d5 e2e3 b8c6 f1d3","epd":"r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D43","name":"Semi-Slav Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6","epd":"rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D43","name":"Semi-Slav Defense: Anti-Moscow Gambit","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 h7h6 g5h4","epd":"rnbqkb1r/pp3pp1/2p1pn1p/3p4/2PP3B/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D43","name":"Semi-Slav Defense: Hastings Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 h7h6 g5f6 d8f6 d1b3","epd":"rnb1kb1r/pp3pp1/2p1pq1p/3p4/2PP4/1QN2N2/PP2PPPP/R3KB1R b KQkq -"},{"eco":"D43","name":"Semi-Slav Defense: Moscow Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bxf6 Qxf6","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 h7h6 g5f6 d8f6","epd":"rnb1kb1r/pp3pp1/2p1pq1p/3p4/2PP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D44","name":"Semi-Slav Defense Accepted","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4","epd":"rnbqkb1r/pp3ppp/2p1pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4","epd":"rnbqkb1r/pp3ppp/2p1pn2/6B1/2pPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5","epd":"rnbqkb1r/p4p2/2p1pn1p/1p2P1N1/2pP3B/2N5/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation, Alatortsev System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 Nd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 f6d5","epd":"rnbqkb1r/p4p2/2p1p2p/1p1nP1N1/2pP3B/2N5/PP3PPP/R2QKB1R w KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. exf6 gxh4 10. Ne5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 e5f6 g5h4 f3e5","epd":"rnbqkb1r/p4p2/2p1pP1p/1p2N3/2pP3p/2N5/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. g3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 g2g3","epd":"r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N3P1/PP3P1P/R2QKB1R b KQkq -"},{"eco":"D44","name":"Semi-Slav Defense: Botvinnik Variation, Szabo Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 c7c6 c1g5 d5c4 e2e4 b7b5 e4e5 h7h6 g5h4 g7g5 f3g5 h6g5 h4g5 b8d7 d1f3","epd":"r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N2Q2/PP3PPP/R3KB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Accelerated Meran Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 a6","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 a7a6","epd":"rnbqkb1r/1p3ppp/p1p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Main Line","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3","epd":"rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Normal Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Normal Variation","pgn":"1. Nf3 d5 2. e3 Nf6 3. c4 c6 4. Nc3 e6 5. b3 Bd6 6. Bb2 O-O 7. d4 Nbd7","uci":"g1f3 d7d5 e2e3 g8f6 c2c4 c7c6 b1c3 e7e6 b2b3 f8d6 c1b2 e8g8 d2d4 b8d7","epd":"r1bq1rk1/pp1n1ppp/2pbpn2/3p4/2PP4/1PN1PN2/PB3PPP/R2QKB1R w KQ -"},{"eco":"D45","name":"Semi-Slav Defense: Normal Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. b3 Bd6 7. Bb2 O-O 8. Be2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 g8f6 e2e3 b8d7 b2b3 f8d6 c1b2 e8g8 f1e2","epd":"r1bq1rk1/pp1n1ppp/2pbpn2/3p4/2PP4/1PN1PN2/PB2BPPP/R2QK2R b KQ -"},{"eco":"D45","name":"Semi-Slav Defense: Rubinstein System","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. e3 Nbd7 6. Ne5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 g1f3 g8f6 e2e3 b8d7 f3e5","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3pN3/2PP4/2N1P3/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Stoltz Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 d1c2","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Stoltz Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. 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Bb2","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 e2e3 e7e6 b1c3 b8d7 d1c2 f8d6 b2b3 e8g8 c1b2","epd":"r1bq1rk1/pp1n1ppp/2pbpn2/3p4/2PP4/1PN1PN2/PBQ2PPP/R3KB1R b KQ -"},{"eco":"D45","name":"Semi-Slav Defense: Stoltz Variation, Center Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 d1c2 f8d6 e3e4","epd":"r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PPP3/2N2N2/PPQ2PPP/R1B1KB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Qxe4 e5 10. dxe5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 d1c2 f8d6 e3e4 d5e4 c3e4 f6e4 c2e4 e6e5 d4e5","epd":"r1bqk2r/pp1n1ppp/2pb4/4P3/2P1Q3/5N2/PP3PPP/R1B1KB1R b KQkq -"},{"eco":"D45","name":"Semi-Slav Defense: Stoltz Variation, Shabalov Attack","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. 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Qc2","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 e7e6 e2e3 g8f6 b1c3 f8d6 f1d3 d5c4 d3c4 b7b5 c4d3 b8d7 e1g1 e8g8 d1c2","epd":"r1bq1rk1/p2n1ppp/2pbpn2/1p6/3P4/2NBPN2/PPQ2PPP/R1B2RK1 b - -"},{"eco":"D46","name":"Semi-Slav Defense: Chigorin Defense","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. O-O Bb7 10. a3 O-O 11. Qc2","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 f8d6 e1g1 c8b7 a2a3 e8g8 d1c2","epd":"r2q1rk1/pb1n1ppp/2pbpn2/1p6/3P4/P1NBPN2/1PQ2PPP/R1B2RK1 b - -"},{"eco":"D46","name":"Semi-Slav Defense: Main Line","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D46","name":"Semi-Slav Defense: Main Line","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 b6 7. b3 Bb7 8. Bd3 Be7 9. O-O O-O 10. Bb2","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 d1c2 b7b6 b2b3 c8b7 f1d3 f8e7 e1g1 e8g8 c1b2","epd":"r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PP4/1PNBPN2/PBQ2PPP/R4RK1 b - -"},{"eco":"D46","name":"Semi-Slav Defense: Romih Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bb4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 f8b4","epd":"r1bqk2r/pp1n1ppp/2p1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D47","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5","epd":"r1bqkb1r/p2n1ppp/2p1pn2/1p6/2BP4/2N1PN2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D47","name":"Semi-Slav Defense: Meran Variation, Lundin Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. 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Nxd4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7 e3e4 b5b4 c3a4 c6c5 e4e5 f6d5 e1g1 c5d4 f3d4","epd":"r2qkb1r/pb1n1ppp/4p3/3nP3/Np1N4/3B4/PP3PPP/R1BQ1RK1 b kq -"},{"eco":"D47","name":"Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Na4 c5 11. e5 Nd5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 c8b7 e3e4 b5b4 c3a4 c6c5 e4e5 f6d5","epd":"r2qkb1r/pb1n1ppp/4p3/2pnP3/Np1P4/3B1N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D47","name":"Semi-Slav Defense: Semi-Meran Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/8/2BP4/2N1PN2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6","epd":"r1bqkb1r/3n1ppp/p1p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5","epd":"r1bqkb1r/3n1ppp/p3pn2/1pp5/3PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 a6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 c5 9. O-O Bb7 10. Qe2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 g8f6 g1f3 a7a6 f1d3 d5c4 d3c4 b7b5 c4d3 c6c5 e1g1 c8b7 d1e2","epd":"rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/2NBPN2/PP2QPPP/R1B2RK1 b kq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 a6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 c5 9. O-O Bb7 10. Qe2 Nbd7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 g8f6 g1f3 a7a6 f1d3 d5c4 d3c4 b7b5 c4d3 c6c5 e1g1 c8b7 d1e2 b8d7","epd":"r2qkb1r/1b1n1ppp/p3pn2/1pp5/3P4/2NBPN2/PP2QPPP/R1B2RK1 w kq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 a6 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 c5 9. a4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 g8f6 g1f3 a7a6 f1d3 d5c4 d3c4 b7b5 c4d3 c6c5 a2a4","epd":"rnbqkb1r/5ppp/p3pn2/1pp5/P2P4/2NBPN2/1P3PPP/R1BQK2R b KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation, Old Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5","epd":"r1bqkb1r/3n1ppp/p3pn2/1pp1P3/3P4/2NB1N2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation, Pirc Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 b4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 c7c6 e2e3 g8f6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 b5b4","epd":"r1bqkb1r/3n1ppp/p1p1pn2/8/1p1PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D48","name":"Semi-Slav Defense: Meran Variation, Reynolds' Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. d5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 d4d5","epd":"r1bqkb1r/3n1ppp/p3pn2/1ppP4/4P3/2NB1N2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Blumenfeld Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5","epd":"r1bqkb1r/3n1ppp/p3pn2/1N2P3/3p4/3B1N2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Rabinovich Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Ng4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 f6g4","epd":"r1bqkb1r/3n1ppp/p3p3/1N2P3/3p2n1/3B1N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Rellstab Attack","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O Qd5 14. Qe2 Ba6 15. Bg5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 g1f3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 e1g1 d8d5 d1e2 c8a6 c1g5","epd":"r3kb1r/5ppp/b3pn2/1p1qN1B1/3p4/3B4/PP2QPPP/R4RK1 b kq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Sozin Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5","epd":"r1bqkb1r/5ppp/p3pn2/1N2n3/3p4/3B1N2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Sozin Variation","pgn":"1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. O-O","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 c7c6 b1c3 e7e6 e2e3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 e1g1","epd":"r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B4/PP3PPP/R1BQ1RK1 b kq -"},{"eco":"D49","name":"Semi-Slav Defense: Meran Variation, Stahlberg Variation","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 Nxe5 12. Nxe5 axb5 13. Qf3","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 e7e6 g1f3 b8d7 f1d3 d5c4 d3c4 b7b5 c4d3 a7a6 e3e4 c6c5 e4e5 c5d4 c3b5 d7e5 f3e5 a6b5 d1f3","epd":"r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B1Q2/PP3PPP/R1B1K2R b KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Been-Koomen Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5","epd":"rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Modern Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5","epd":"rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Pseudo-Tarrasch Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5","epd":"rnbqkb1r/pp3ppp/4pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Pseudo-Tarrasch Variation, Canal Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 Qb6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 c4d5 d8b6","epd":"rnb1kb1r/pp3ppp/1q2pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Qxd4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 d1d4","epd":"rnbqkb1r/pp3ppp/4pn2/3p2B1/2PQ4/2N2N2/PP2PPPP/R3KB1R b KQkq -"},{"eco":"D50","name":"Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. Nf3 cxd4 6. Nxd4 e5 7. Ndb5 a6 8. Qa4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c5 g1f3 c5d4 f3d4 e6e5 d4b5 a7a6 d1a4","epd":"rnbqkb1r/1p3ppp/p4n2/1N1pp1B1/Q1P5/2N5/PP2PPPP/R3KB1R b KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Alekhine Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 e2e4","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. a3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 a2a3","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/P1N1P3/1P3PPP/R2QKBNR b KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Manhattan Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 f8b4","epd":"r1bqk2r/pppn1ppp/4pn2/3p2B1/1bPP4/2N1P3/PP3PPP/R2QKBNR w KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Modern Variation, Knight Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7","epd":"r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Modern Variation, Knight Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3","epd":"r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR b KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Modern Variation, Knight Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQkq -"},{"eco":"D51","name":"Queen's Gambit Declined: Rochlin Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 g1f3 c7c6 a1c1 d8a5 g5d2","epd":"r1b1kb1r/pp1n1ppp/2p1pn2/q2p4/2PP4/2N2N2/PP1BPPPP/2RQKB1R b Kkq -"},{"eco":"D52","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3","epd":"r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5","epd":"r1b1kb1r/pp1n1ppp/2p1pn2/q2p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 c4d5","epd":"r1b1kb1r/pp1n1ppp/2p1pn2/q2P2B1/3P4/2N1PN2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense, Argentine Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 O-O 9. Bh4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 f3d2 f8b4 d1c2 e8g8 g5h4","epd":"r1b2rk1/pp1n1ppp/2p1pn2/q2p4/1bPP3B/2N1P3/PPQN1PPP/R3KB1R b KQ -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 f3d2 f8b4 d1c2","epd":"r1b1k2r/pp1n1ppp/2p1pn2/q2p2B1/1bPP4/2N1P3/PPQN1PPP/R3KB1R b KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Bxf6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 b8d7 e2e3 c7c6 g1f3 d8a5 g5f6","epd":"r1b1kb1r/pp1n1ppp/2p1pB2/q2p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 dxc4","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 f3d2 d5c4","epd":"r1b1kb1r/pp1n1ppp/2p1pn2/q5B1/2pP4/2N1P3/PP1N1PPP/R2QKB1R w KQkq -"},{"eco":"D52","name":"Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 b1c3 e7e6 c1g5 b8d7 e2e3 d8a5 c4d5 f6d5","epd":"r1b1kb1r/pp1n1ppp/2p1p3/q2n2B1/3P4/2N1PN2/PP3PPP/R2QKB1R w KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7","epd":"rnbqk2r/ppp1bppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 g1f3","epd":"rnbqk2r/ppp1bppp/4pn2/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Nf3 c6 6. e3 dxc4 7. Bxc4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 g1f3 c7c6 e2e3 d5c4 f1c4","epd":"rnbqk2r/pp2bppp/2p1pn2/6B1/2BP4/2N1PN2/PP3PPP/R2QK2R b KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. Bg5 Be7","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 d5c4 c1g5 f8e7","epd":"rnbqk2r/ppp1bppp/4pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 dxc4 5. Bg5 Be7 6. e4","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 d5c4 c1g5 f8e7 e2e4","epd":"rnbqk2r/ppp1bppp/4pn2/6B1/2pPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Nc6 5. Bg5 Be7 6. e3 O-O","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 b8c6 c1g5 f8e7 e2e3 e8g8","epd":"r1bq1rk1/ppp1bppp/2n1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D53","name":"Queen's Gambit Declined: Lasker Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 f6e4","epd":"rnbqk2r/ppp1bppp/4p3/3p2B1/2PPn3/2N1P3/PP3PPP/R2QKBNR w KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined: Modern Variation, Heral Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 g5f6","epd":"rnbqk2r/ppp1bppp/4pB2/3p4/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"D53","name":"Queen's Gambit Declined: Uhlmann Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. Rc1 dxc4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 a1c1 d5c4","epd":"rnbq1rk1/ppp1bpp1/4pn1p/8/2pP3B/2N2N2/PP2PPPP/2RQKB1R w K -"},{"eco":"D54","name":"Queen's Gambit Declined: Neo-Orthodox Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Rc1","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 e8g8 a1c1","epd":"rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/2RQKBNR b K -"},{"eco":"D55","name":"Queen's Gambit Declined: Anti-Tartakower Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bxf6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 h7h6 g5f6","epd":"rnbq1rk1/ppp1bpp1/4pB1p/3p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -"},{"eco":"D55","name":"Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bxf6 Bxf6 7. e3 O-O 8. Rc1 c6 9. Bd3 Nd7 10. O-O dxc4 11. Bxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5f6 e7f6 e2e3 e8g8 a1c1 c7c6 f1d3 b8d7 e1g1 d5c4 d3c4","epd":"r1bq1rk1/pp1n1pp1/2p1pb1p/8/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -"},{"eco":"D55","name":"Queen's Gambit Declined: Modern Variation, Normal Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3","epd":"rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -"},{"eco":"D55","name":"Queen's Gambit Declined: Neo-Orthodox Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 h7h6","epd":"rnbq1rk1/ppp1bpp1/4pn1p/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D55","name":"Queen's Gambit Declined: Neo-Orthodox Variation, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3","epd":"rnbq1rk1/ppp1bpp1/4pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R b KQ -"},{"eco":"D55","name":"Queen's Gambit Declined: Pillsbury Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 d5 5. cxd5 exd5 6. Bg5 Be7 7. e3 O-O 8. Bd3 Bb7 9. Ne5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 d7d5 c4d5 e6d5 c1g5 f8e7 e2e3 e8g8 f1d3 c8b7 f3e5","epd":"rn1q1rk1/pbp1bppp/1p3n2/3pN1B1/3P4/2NBP3/PP3PPP/R2QK2R b KQ -"},{"eco":"D56","name":"Queen's Gambit Declined","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Nc6 5. Bg5 Be7 6. e3 O-O 7. Rc1 h6 8. Bh4","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 b8c6 c1g5 f8e7 e2e3 e8g8 a1c1 h7h6 g5h4","epd":"r1bq1rk1/ppp1bpp1/2n1pn1p/3p4/2PP3B/2N1PN2/PP3PPP/2RQKB1R b K -"},{"eco":"D56","name":"Queen's Gambit Declined: Lasker Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4","epd":"rnbq1rk1/ppp1bpp1/4p2p/3p4/2PPn2B/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D56","name":"Queen's Gambit Declined: Lasker Defense","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Nc6 5. Bg5 Be7 6. e3 O-O 7. Rc1 h6 8. Bh4 Ne4","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 b8c6 c1g5 f8e7 e2e3 e8g8 a1c1 h7h6 g5h4 f6e4","epd":"r1bq1rk1/ppp1bpp1/2n1p2p/3p4/2PPn2B/2N1PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D56","name":"Queen's Gambit Declined: Lasker Defense, Russian Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. Qc2 Nf6 10. Bd3 dxc4 11. Bxc4 c5 12. O-O Nc6 13. Rfd1 Bd7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 d1c2 e4f6 f1d3 d5c4 d3c4 c7c5 e1g1 b8c6 f1d1 c8d7","epd":"r4rk1/pp1bqpp1/2n1pn1p/2p5/2BP4/2N1PN2/PPQ2PPP/R2R2K1 w - -"},{"eco":"D56","name":"Queen's Gambit Declined: Lasker Defense, Teichmann Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4 h4e7 d8e7 d1c2","epd":"rnb2rk1/ppp1qpp1/4p2p/3p4/2PPn3/2N1PN2/PPQ2PPP/R3KB1R b KQ -"},{"eco":"D57","name":"Queen's Gambit Declined: Lasker Defense, Bernstein Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 h6 6. Bh4 O-O 7. Nf3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Qd6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 h7h6 g5h4 e8g8 g1f3 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3 e6d5 d1b3 e7d6","epd":"rnb2rk1/ppp2pp1/3q3p/3p4/3P4/1QP1PN2/P4PPP/R3KB1R w KQ -"},{"eco":"D57","name":"Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 Rd8 12. c4 Be6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 h7h6 g5h4 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3 e6d5 d1b3 f8d8 c3c4 c8e6","epd":"rn1r2k1/ppp1qpp1/4b2p/3p4/2PP4/1Q2PN2/P4PPP/R3KB1R w KQ -"},{"eco":"D57","name":"Queen's Gambit Declined: Lasker Defense, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 f6e4 h4e7 d8e7 c4d5 e4c3 b2c3","epd":"rnb2rk1/ppp1qpp1/4p2p/3P4/3P4/2P1PN2/P4PPP/R2QKB1R b KQ -"},{"eco":"D58","name":"Queen's Gambit Declined: Tartakower Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6","epd":"rnbq1rk1/p1p1bpp1/1p2pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D58","name":"Queen's Gambit Declined: Tartakower Defense, Exchange Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 exd5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 e6d5","epd":"rnbq1rk1/p1p1bpp1/1p3n1p/3p4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D59","name":"Queen's Gambit Declined: Tartakower Defense","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 f6d5 h4e7 d8e7 c3d5 e6d5 a1c1 c8e6","epd":"rn3rk1/p1p1qpp1/1p2b2p/3p4/3P4/4PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D59","name":"Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. cxd5 Nxd5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 f8e7 g1f3 g8f6 c1g5 h7h6 g5h4 e8g8 e2e3 b7b6 c4d5 f6d5","epd":"rnbq1rk1/p1p1bpp1/1p2p2p/3n4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D60","name":"Queen's Gambit Declined: Orthodox Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7","epd":"r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -"},{"eco":"D60","name":"Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 f1d3","epd":"r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2NBPN2/PP3PPP/R2QK2R b KQ -"},{"eco":"D60","name":"Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Bd3 c6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 f1d3 c7c6","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2NBPN2/PP3PPP/R2QK2R w KQ -"},{"eco":"D60","name":"Queen's Gambit Declined: Orthodox Defense, Rauzer Variation","pgn":"1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qb3","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 d1b3","epd":"r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/1QN1PN2/PP3PPP/R3KB1R b KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2","epd":"r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R b KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 c7c5","epd":"r1bq1rk1/pp1nbppp/4pn2/2pp2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R w KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 c7c6","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R w KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c6 8. a3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 c7c6 a2a3","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/P1N1PN2/1PQ2PPP/R3KB1R b KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 a6 8. cxd5 exd5 9. Bd3 Re8","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 a7a6 c4d5 e6d5 f1d3 f8e8","epd":"r1bqr1k1/1ppnbppp/p4n2/3p2B1/3P4/2NBPN2/PPQ2PPP/R3K2R w KQ -"},{"eco":"D61","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Qc2 c6 8. Rd1 a6","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 d1c2 c7c6 a1d1 a7a6","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/3RKB1R w K -"},{"eco":"D62","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qc2 c5 8. cxd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 d1c2 c7c5 c4d5","epd":"r1bq1rk1/pp1nbppp/4pn2/2pP2B1/3P4/2N1PN2/PPQ2PPP/R3KB1R b KQ -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Capablanca Variation","pgn":"1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bb5","uci":"g1f3 d7d5 d2d4 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 b7b6 c4d5 e6d5 f1b5","epd":"r1bq1rk1/p1pnbppp/1p3n2/1B1p2B1/3P4/2N1PN2/PP3PPP/2RQK2R b K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Henneberger Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6","epd":"r1bq1rk1/1ppnbppp/p3pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Henneberger Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. c5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6 c4c5","epd":"r1bq1rk1/1ppnbppp/p3pn2/2Pp2B1/3P4/2N1PN2/PP3PPP/2RQKB1R b K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Henneberger Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. c5 c6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6 c4c5 c7c6","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/2Pp2B1/3P4/2N1PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Henneberger Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. c5 c6 9. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6 c4c5 c7c6 f1d3","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/2Pp2B1/3P4/2NBPN2/PP3PPP/2RQK2R b K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1","epd":"r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R b K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 Nbd7 6. Nf3 O-O 7. Rc1 h6 8. Bh4 c5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 b8d7 g1f3 e8g8 a1c1 h7h6 g5h4 c7c5","epd":"r1bq1rk1/pp1nbpp1/4pn1p/2pp4/2PP3B/2N1PN2/PP3PPP/2RQKB1R w K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 b6 8. cxd5 exd5 9. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 b7b6 c4d5 e6d5 f1d3","epd":"r1bq1rk1/p1pnbppp/1p3n2/3p2B1/3P4/2NBPN2/PP3PPP/2RQK2R b K -"},{"eco":"D63","name":"Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 a6 8. cxd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 a7a6 c4d5","epd":"r1bq1rk1/1ppnbppp/p3pn2/3P2B1/3P4/2N1PN2/PP3PPP/2RQKB1R b K -"},{"eco":"D64","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. a3 a6 9. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 d7d5 g1f3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 a2a3 a7a6 d1c2","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/P1N1PN2/1PQ2PPP/2R1KB1R b K -"},{"eco":"D64","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R b K -"},{"eco":"D64","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 a7a6","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R w K -"},{"eco":"D64","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 Ne4","uci":"g1f3 d7d5 d2d4 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 f6e4","epd":"r1bq1rk1/pp1nbppp/2p1p3/3p2B1/2PPn3/2N1PN2/PPQ2PPP/2R1KB1R w K -"},{"eco":"D65","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 a7a6 c4d5","epd":"r1bq1rk1/1p1nbppp/p1p1pn2/3P2B1/3P4/2N1PN2/PPQ2PPP/2R1KB1R b K -"},{"eco":"D65","name":"Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack","pgn":"1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Qc2 a6 9. cxd5 exd5 10. Bd3","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 d1c2 a7a6 c4d5 e6d5 f1d3","epd":"r1bq1rk1/1p1nbppp/p1p2n2/3p2B1/3P4/2NBPN2/PPQ2PPP/2R1K2R b K -"},{"eco":"D66","name":"Queen's Gambit Declined: Orthodox Defense, Bd3 Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2NBPN2/PP3PPP/2RQK2R b K -"},{"eco":"D66","name":"Queen's Gambit Declined: Orthodox Defense, Bd3 Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 h6 9. Bh4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 h7h6 g5h4","epd":"r1bq1rk1/pp1nbpp1/2p1pn1p/3p4/2PP3B/2NBPN2/PP3PPP/2RQK2R b K -"},{"eco":"D66","name":"Queen's Gambit Declined: Orthodox Defense, Fianchetto Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c6 5. Nf3 Be7 6. e3 Nbd7 7. Rc1 O-O 8. Bd3 dxc4 9. Bxc4 b5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 c7c6 g1f3 f8e7 e2e3 b8d7 a1c1 e8g8 f1d3 d5c4 d3c4 b7b5","epd":"r1bq1rk1/p2nbppp/2p1pn2/1p4B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -"},{"eco":"D67","name":"Queen's Gambit Declined: Orthodox Defense, Alekhine Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 c3e4","epd":"r1b2rk1/pp1nqppp/2p1p3/3n4/2BPN3/4PN2/PP3PPP/2RQK2R b K -"},{"eco":"D67","name":"Queen's Gambit Declined: Orthodox Defense, Bd3 Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7","epd":"r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQK2R w K -"},{"eco":"D67","name":"Queen's Gambit Declined: Orthodox Defense, Capablanca System","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5","epd":"r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -"},{"eco":"D67","name":"Queen's Gambit Declined: Orthodox Defense, Janowski Variation","pgn":"1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. h4","uci":"d2d4 d7d5 g1f3 g8f6 c2c4 e7e6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 h2h4","epd":"r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP3P/2N1PN2/PP3PP1/2RQK2R b K -"},{"eco":"D67","name":"Queen's Gambit Declined: Orthodox Defense, Main Line","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1","epd":"r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -"},{"eco":"D68","name":"Queen's Gambit Declined: Orthodox Defense, Classical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5","epd":"r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w - -"},{"eco":"D68","name":"Queen's Gambit Declined: Orthodox Defense, Classical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qb1","uci":"d2d4 d7d5 c2c4 e7e6 g1f3 g8f6 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1b1","epd":"r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/1Q3RK1 b - -"},{"eco":"D68","name":"Queen's Gambit Declined: Orthodox Defense, Classical Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 b1c3 f8e7 c1g5 e8g8 e2e3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d1c2","epd":"r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PPQ2PPP/5RK1 b - -"},{"eco":"D69","name":"Queen's Gambit Declined: Orthodox Defense, Classical Variation","pgn":"1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O Nxc3 12. Rxc3 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5","uci":"d2d4 d7d5 c2c4 e7e6 b1c3 g8f6 c1g5 f8e7 e2e3 e8g8 g1f3 b8d7 a1c1 c7c6 f1d3 d5c4 d3c4 f6d5 g5e7 d8e7 e1g1 d5c3 c1c3 e6e5 d4e5 d7e5 f3e5 e7e5","epd":"r1b2rk1/pp3ppp/2p5/4q3/2B5/2R1P3/PP3PPP/3Q1RK1 w - -"},{"eco":"D70","name":"Neo-Grünfeld Defense: Goglidze Attack","pgn":"1. d4 Nf6 2. c4 g6 3. f3 d5","uci":"d2d4 g8f6 c2c4 g7g6 f2f3 d7d5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq -"},{"eco":"D70","name":"Neo-Grünfeld Defense: with Nf3","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 d5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 d7d5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"D70","name":"Neo-Grünfeld Defense: with g3","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -"},{"eco":"D71","name":"Neo-Grünfeld Defense: Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 d7d5 c4d5 f6d5","epd":"rnbqk2r/ppp1ppbp/6p1/3n4/3P4/6P1/PP2PPBP/RNBQK1NR w KQkq -"},{"eco":"D71","name":"Neo-Grünfeld Defense: Exchange Variation","pgn":"1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 d5 5. cxd5 Nxd5 6. Nf3","uci":"c2c4 g8f6 g2g3 g7g6 f1g2 f8g7 d2d4 d7d5 c4d5 f6d5 g1f3","epd":"rnbqk2r/ppp1ppbp/6p1/3n4/3P4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"D72","name":"Neo-Grünfeld Defense: with g3","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 c4d5 f6d5 e2e4 d5b6 g1e2","epd":"rnbqk2r/ppp1ppbp/1n4p1/8/3PP3/6P1/PP2NPBP/RNBQK2R b KQkq -"},{"eco":"D73","name":"Neo-Grünfeld Defense: with g3","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"D74","name":"Neo-Grünfeld Defense: Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d5 6. cxd5 Nxd5 7. O-O","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d5 c4d5 f6d5 e1g1","epd":"rnbq1rk1/ppp1ppbp/6p1/3n4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b - -"},{"eco":"D75","name":"Neo-Grünfeld Defense: Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. g3 d5 6. cxd5 Nxd5 7. Bg2 c5 8. 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Ne5 e6","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5 f3e5 e7e6","epd":"rnbq1rk1/pp3pbp/4pnp1/3pN3/3P4/6P1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"D79","name":"Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5 8. Ne5 e6 9. Nc3","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5 f3e5 e7e6 b1c3","epd":"rnbq1rk1/pp3pbp/4pnp1/3pN3/3P4/2N3P1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"D79","name":"Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5 8. Ne5 Bf5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5 f3e5 c8f5","epd":"rn1q1rk1/pp2ppbp/5np1/3pNb2/3P4/6P1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"D79","name":"Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5 8. Ne5 Bf5 9. Nc3","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5 f3e5 c8f5 b1c3","epd":"rn1q1rk1/pp2ppbp/5np1/3pNb2/3P4/2N3P1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"D79","name":"Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 d5 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. cxd5 cxd5 8. Ne5 Ng4","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 d7d5 f1g2 f8g7 g1f3 e8g8 e1g1 c7c6 c4d5 c6d5 f3e5 f6g4","epd":"rnbq1rk1/pp2ppbp/6p1/3pN3/3P2n1/6P1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"D80","name":"Grünfeld Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Gibbon Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. g4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g2g4","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP2P1/2N5/PP2PP1P/R1BQKBNR b KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Lundin Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Nxe4 dxe4 6. Qd2 c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5 f6e4 c3e4 d5e4 d1d2 c7c5","epd":"rnbqkb1r/pp2pp1p/6p1/2p3B1/2PPp3/8/PP1QPPPP/R3KBNR w KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Lutikov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 f2f3","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Lutikov Variation, Murrey Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. f3 c5 5. cxd5 Nxd5 6. Na4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 f2f3 c7c5 c4d5 f6d5 c3a4","epd":"rnbqkb1r/pp2pp1p/6p1/2pn4/N2P4/5P2/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Stockholm Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1g5","epd":"rnbqkb1r/ppp1pp1p/5np1/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"D80","name":"Grünfeld Defense: Zaitsev Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. h4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 h2h4","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP3P/2N5/PP2PPP1/R1BQKBNR b KQkq -"},{"eco":"D81","name":"Grünfeld Defense: Russian Variation, Accelerated Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 d1b3","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -"},{"eco":"D82","name":"Grünfeld Defense: Brinckmann Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"D83","name":"Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/R2QKBNR w KQ -"},{"eco":"D83","name":"Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 c5 7. dxc5 Be6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1 c7c5 d4c5 c8e6","epd":"rn1q1rk1/pp2ppbp/4bnp1/2Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K -"},{"eco":"D83","name":"Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 a1c1","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/2RQKBNR b K -"},{"eco":"D83","name":"Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. Rc1 O-O 6. e3 c5 7. dxc5 Qa5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 a1c1 e8g8 e2e3 c7c5 d4c5 d8a5","epd":"rnb2rk1/pp2ppbp/5np1/q1Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K -"},{"eco":"D84","name":"Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. cxd5 Nxd5 7. Nxd5 Qxd5 8. Bxc7","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c1f4 f8g7 e2e3 e8g8 c4d5 f6d5 c3d5 d8d5 f4c7","epd":"rnb2rk1/ppB1ppbp/6p1/3q4/3P4/4P3/PP3PPP/R2QKBNR b KQ -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5","epd":"rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Modern Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3","epd":"rnbqk2r/ppp1ppbp/6p1/8/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Modern Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3 c7c5","epd":"rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N2/P4PPP/R1BQKB1R w KQkq -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Modern Exchange Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Rb1","uci":"d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 a1b1","epd":"rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N2/P4PPP/1RBQKB1R b Kkq -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line","pgn":"1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. h3","uci":"d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 c7c5 h2h3","epd":"rnbqk2r/pp2ppbp/6p1/2p5/3PP3/2P2N1P/P4PP1/R1BQKB1R b KQkq -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 O-O 9. Be2 Nc6 10. d5 Bxc3+","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 g1f3 c7c5 a1b1 e8g8 f1e2 b8c6 d4d5 g7c3","epd":"r1bq1rk1/pp2pp1p/2n3p1/2pP4/4P3/2b2N2/P3BPPP/1RBQK2R w K -"},{"eco":"D85","name":"Grünfeld Defense: Exchange Variation, Nadanian Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Na4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 c3a4","epd":"rnbqkb1r/ppp1pp1p/6p1/3n4/N2P4/8/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"D86","name":"Grünfeld Defense: Exchange Variation, Classical Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4","epd":"rnbqk2r/ppp1ppbp/6p1/8/2BPP3/2P5/P4PPP/R1BQK1NR b KQkq -"},{"eco":"D86","name":"Grünfeld Defense: Exchange Variation, Larsen Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 d8d7","epd":"rnb2rk1/pppqppbp/6p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -"},{"eco":"D86","name":"Grünfeld Defense: Exchange Variation, Larsen Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Qd7 9. O-O b6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 d8d7 e1g1 b7b6","epd":"rnb2rk1/p1pqppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQ1RK1 w - -"},{"eco":"D86","name":"Grünfeld Defense: Exchange Variation, Simagin's Improved Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 Nc6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b8c6","epd":"r1bq1rk1/ppp1ppbp/2n3p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -"},{"eco":"D86","name":"Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 b6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 e8g8 g1e2 b7b6","epd":"rnbq1rk1/p1p1ppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -"},{"eco":"D87","name":"Grünfeld Defense: Exchange Variation, Seville Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bxf7+","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c8g4 f2f3 c6a5 c4f7","epd":"r2q1rk1/pp2pBbp/6p1/n1p5/3PP1b1/2P1BP2/P3N1PP/R2Q1RK1 b - -"},{"eco":"D87","name":"Grünfeld Defense: Exchange Variation, Spassky Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 e8g8","epd":"rnbq1rk1/pp2ppbp/6p1/2p5/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -"},{"eco":"D88","name":"Grünfeld Defense: Exchange Variation, Spassky Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O cxd4 11. cxd4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c5d4 c3d4","epd":"r1bq1rk1/pp2ppbp/2n3p1/8/2BPP3/4B3/P3NPPP/R2Q1RK1 b - -"},{"eco":"D89","name":"Grünfeld Defense: Exchange Variation, Sokolsky Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6 14. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 e8g8 e1g1 b8c6 c1e3 c8g4 f2f3 c6a5 c4d3 c5d4 c3d4 g4e6 d4d5","epd":"r2q1rk1/pp2ppbp/4b1p1/n2P4/4P3/3BBP2/P3N1PP/R2Q1RK1 b - -"},{"eco":"D89","name":"Grünfeld Defense: Exchange Variation, Spassky Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 O-O 10. O-O Bg4 11. f3 Na5 12. Bd3 cxd4 13. cxd4 Be6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 c4d5 f6d5 e2e4 d5c3 b2c3 f8g7 f1c4 c7c5 g1e2 b8c6 c1e3 e8g8 e1g1 c8g4 f2f3 c6a5 c4d3 c5d4 c3d4 g4e6","epd":"r2q1rk1/pp2ppbp/4b1p1/n7/3PP3/3BBP2/P3N1PP/R2Q1RK1 w - -"},{"eco":"D90","name":"Grünfeld Defense: Flohr Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1a4","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/Q1PP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq -"},{"eco":"D90","name":"Grünfeld Defense: Three Knights Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3","epd":"rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"D90","name":"Grünfeld Defense: Three Knights Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"D91","name":"Grünfeld Defense: Three Knights Variation, Petrosian System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1g5","epd":"rnbqk2r/ppp1ppbp/5np1/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D92","name":"Grünfeld Defense: Three Knights Variation, Hungarian Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"D93","name":"Grünfeld Defense: Three Knights Variation, Hungarian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. e3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 c1f4 e8g8 e2e3","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R b KQ -"},{"eco":"D94","name":"Grünfeld Defense: Flohr Defense","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bf5","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 g7g6 g1f3 f8g7 f1d3 e8g8 e1g1 c8f5","epd":"rn1q1rk1/pp2ppbp/2p2np1/3p1b2/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"D94","name":"Grünfeld Defense: Makogonov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 b2b4","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/1PPP4/2N1PN2/P4PPP/R1BQKB1R b KQ -"},{"eco":"D94","name":"Grünfeld Defense: Opocensky Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 c1d2","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP1B1PPP/R2QKB1R b KQ -"},{"eco":"D94","name":"Grünfeld Defense: Smyslov Defense","pgn":"1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 g6 5. Nf3 Bg7 6. Bd3 O-O 7. O-O Bg4","uci":"d2d4 d7d5 c2c4 c7c6 b1c3 g8f6 e2e3 g7g6 g1f3 f8g7 f1d3 e8g8 e1g1 c8g4","epd":"rn1q1rk1/pp2ppbp/2p2np1/3p4/2PP2b1/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"D94","name":"Grünfeld Defense: Three Knights Variation, Burille Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"D94","name":"Grünfeld Defense: Three Knights Variation, Paris Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Bd3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 f1d3","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQ -"},{"eco":"D95","name":"Grünfeld Defense: Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3 e6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3 e7e6","epd":"rnbq1rk1/ppp2pbp/4pnp1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D95","name":"Grünfeld Defense: Pachman Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 dxc4 6. Bxc4 O-O 7. Nf3 Nbd7 8. Ng5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 e2e3 f8g7 d1b3 d5c4 f1c4 e8g8 g1f3 b8d7 f3g5","epd":"r1bq1rk1/pppnppbp/5np1/6N1/2BP4/1QN1P3/PP3PPP/R1B1K2R b KQ -"},{"eco":"D95","name":"Grünfeld Defense: Three Knights Variation, Vienna Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. Qb3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 e2e3 e8g8 d1b3","epd":"rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R b KQ -"},{"eco":"D96","name":"Grünfeld Defense: Russian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/1QN2N2/PP2PPPP/R1B1KB1R b KQkq -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4","epd":"rnbq1rk1/ppp1ppbp/5np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R b KQ -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation, Byrne Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8c6","epd":"r1bq1rk1/ppp1ppbp/2n2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation, Hungarian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 a7a6","epd":"rnbq1rk1/1pp1ppbp/p4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation, Levenfish Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 b6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b7b6","epd":"rnbq1rk1/p1p1ppbp/1p3np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation, Prins Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Na6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 b8a6","epd":"r1bq1rk1/ppp1ppbp/n4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D97","name":"Grünfeld Defense: Russian Variation, Szabo Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c7c6","epd":"rnbq1rk1/pp2ppbp/2p2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D98","name":"Grünfeld Defense: Russian Variation, Keres Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Be2 Nb6 10. Qd3 Nc6 11. O-O-O","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 f1e2 d7b6 c4d3 b8c6 e1c1","epd":"r2q1rk1/ppp1ppbp/1nn3p1/8/3PP1b1/2NQBN2/PP2BPPP/2KR3R b - -"},{"eco":"D98","name":"Grünfeld Defense: Russian Variation, Smyslov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4","epd":"rn1q1rk1/ppp1ppbp/5np1/8/2QPP1b1/2N2N2/PP3PPP/R1B1KB1R w KQ -"},{"eco":"D99","name":"Grünfeld Defense: Russian Variation, Smyslov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3","epd":"rn1q1rk1/pppnppbp/6p1/8/3PP1b1/1QN1BN2/PP3PPP/R3KB1R b KQ -"},{"eco":"D99","name":"Grünfeld Defense: Russian Variation, Yugoslav Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3 c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 d7d5 g1f3 f8g7 d1b3 d5c4 b3c4 e8g8 e2e4 c8g4 c1e3 f6d7 c4b3 c7c5","epd":"rn1q1rk1/pp1nppbp/6p1/2p5/3PP1b1/1QN1BN2/PP3PPP/R3KB1R w KQ -"},{"eco":"E00","name":"Catalan Opening","pgn":"1. d4 Nf6 2. c4 e6 3. g3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"E00","name":"Catalan Opening","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -"},{"eco":"E00","name":"Catalan Opening: Hungarian Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. g3 e5","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 e6e5","epd":"rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -"},{"eco":"E00","name":"Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Qb3","uci":"d2d4 g8f6 c2c4 e7e6 d1b3","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2PP4/1Q6/PP2PPPP/RNB1KBNR b KQkq -"},{"eco":"E00","name":"Indian Defense: Devin Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. g4","uci":"d2d4 g8f6 c2c4 e7e6 g2g4","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2PP2P1/8/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"E00","name":"Indian Defense: Seirawan Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 c1g5","epd":"rnbqkb1r/pppp1ppp/4pn2/6B1/2PP4/8/PP2PPPP/RN1QKBNR b KQkq -"},{"eco":"E01","name":"Catalan Opening: Open Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2","epd":"rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -"},{"eco":"E01","name":"Catalan Opening: Tarrasch Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 c5 5. Nf3 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 c7c5 g1f3 b8c6","epd":"r1bqkb1r/pp3ppp/2n1pn2/2pp4/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E02","name":"Catalan Opening: Open Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pP4/6P1/PP2PPBP/RNBQK1NR w KQkq -"},{"eco":"E03","name":"Catalan Opening: Open Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4","epd":"r1bqkb1r/pppn1ppp/4pn2/8/2QP4/6P1/PP2PPBP/RNB1K1NR b KQkq -"},{"eco":"E03","name":"Catalan Opening: Open Defense, Alekhine Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 d1a4 b8d7 a4c4 a7a6 c4c2","epd":"r1bqkb1r/1ppn1ppp/p3pn2/8/3P4/6P1/PPQ1PPBP/RNB1K1NR b KQkq -"},{"eco":"E04","name":"Catalan Opening: Open Defense","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3","epd":"rnbqkb1r/ppp2ppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"E04","name":"Catalan Opening: Open Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 c6 5. Bg2 dxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 c7c6 f1g2 d5c4","epd":"rnbqkb1r/pp3ppp/2p1pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E04","name":"Catalan Opening: Open Defense, Modern Sharp Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Nc6 6. Qa4 Bb4+","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3 b8c6 d1a4 f8b4","epd":"r1bqk2r/ppp2ppp/2n1pn2/8/QbpP4/5NP1/PP2PPBP/RNB1K2R w KQkq -"},{"eco":"E05","name":"Catalan Opening: Open Defense, Classical Line","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 d5c4 g1f3 f8e7","epd":"rnbqk2r/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E05","name":"Catalan Opening: Open Defense, Classical Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 d5c4","epd":"rnbq1rk1/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"E06","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"E06","name":"Catalan Opening: Closed","pgn":"1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. d4 O-O 6. O-O c6","uci":"c2c4 e7e6 g1f3 d7d5 g2g3 g8f6 f1g2 f8e7 d2d4 e8g8 e1g1 c7c6","epd":"rnbq1rk1/pp2bppp/2p1pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"E06","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Bf4 b6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d2f4 b7b6","epd":"rnbq1rk1/p3bppp/1pp1pn2/3p4/2PP1B2/5NP1/PP2PPBP/RN1Q1RK1 w - -"},{"eco":"E06","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Na6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 c7c6 d1c2 b7b6 b1d2 c8b7 e2e4 b8a6","epd":"r2q1rk1/pb2bppp/npp1pn2/3p4/2PPP3/5NP1/PPQN1PBP/R1B2RK1 w - -"},{"eco":"E07","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7","epd":"r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"E07","name":"Catalan Opening: Closed, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Nc3 c6 8. Qd3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 b1c3 c7c6 d1d3","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/2NQ1NP1/PP2PPBP/R1B2RK1 b - -"},{"eco":"E08","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2","epd":"r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PPQ1PPBP/RNB2RK1 b - -"},{"eco":"E08","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 b - -"},{"eco":"E08","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3 b7b6","epd":"r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 w - -"},{"eco":"E08","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O c6 7. Qc2 b6 8. Rd1 Nbd7 9. Bf4","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 c7c6 d1c2 b7b6 f1d1 b8d7 c1f4","epd":"r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP1B2/5NP1/PPQ1PPBP/RN1R2K1 b - -"},{"eco":"E08","name":"Catalan Opening: Closed","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 c1f4 b7b6 b1d2 c8b7 e2e4","epd":"r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PPPB2/5NP1/PPQN1PBP/R4RK1 b - -"},{"eco":"E08","name":"Catalan Opening: Closed, Spassky Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Be7 4. Bg2 d5 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. b3 b6 9. Rd1 Bb7 10. Nc3 b5","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8e7 f1g2 d7d5 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b2b3 b7b6 f1d1 c8b7 b1c3 b6b5","epd":"r2q1rk1/pb1nbppp/2p1pn2/1p1p4/2PP4/1PN2NP1/P1Q1PPBP/R1BR2K1 w - -"},{"eco":"E08","name":"Catalan Opening: Closed, Zagoryansky Variation","pgn":"1. d4 e6 2. c4 Nf6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Rd1 b6 9. a4","uci":"d2d4 e7e6 c2c4 g8f6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 f1d1 b7b6 a2a4","epd":"r1bq1rk1/p2nbppp/1pp1pn2/3p4/P1PP4/5NP1/1PQ1PPBP/RNBR2K1 b - -"},{"eco":"E09","name":"Catalan Opening: Closed Variation, Rabinovich Variation","pgn":"1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 e6 5. Nbd2 Be7 6. g3 Nbd7 7. Bg2 O-O 8. O-O b5","uci":"d2d4 d7d5 c2c4 c7c6 g1f3 g8f6 d1c2 e7e6 b1d2 f8e7 g2g3 b8d7 f1g2 e8g8 e1g1 b7b5","epd":"r1bq1rk1/p2nbppp/2p1pn2/1p1p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 w - -"},{"eco":"E09","name":"Catalan Opening: Closed Variation, Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2 b7b6","epd":"r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 w - -"},{"eco":"E09","name":"Catalan Opening: Closed, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 b - -"},{"eco":"E09","name":"Catalan Opening: Closed, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 b6 8. Nbd2 Bb7 9. e4 Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 c7c6 d1c2 b7b6 b1d2 c8b7 e2e4 b8d7","epd":"r2q1rk1/pb1nbppp/1pp1pn2/3p4/2PPP3/5NP1/PPQN1PBP/R1B2RK1 w - -"},{"eco":"E09","name":"Catalan Opening: Closed, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Qc2 c6 8. Bf4 b6 9. Nbd2 Bb7 10. e4 dxe4 11. Nxe4 Nxe4 12. Qxe4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8e7 f1g2 e8g8 e1g1 b8d7 d1c2 c7c6 c1f4 b7b6 b1d2 c8b7 e2e4 d5e4 d2e4 f6e4 c2e4","epd":"r2q1rk1/pb1nbppp/1pp1p3/8/2PPQB2/5NP1/PP3PBP/R4RK1 b - -"},{"eco":"E09","name":"Catalan Opening: Closed, Sokolsky Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O Nbd7 7. Qc2 c6 8. Nbd2 b6 9. b3 a5 10. Bb2 Ba6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 d7d5 f1g2 f8e7 g1f3 e8g8 e1g1 b8d7 d1c2 c7c6 b1d2 b7b6 b2b3 a7a5 c1b2 c8a6","epd":"r2q1rk1/3nbppp/bpp1pn2/p2p4/2PP4/1P3NP1/PBQNPPBP/R4RK1 w - -"},{"eco":"E10","name":"Blumenfeld Countergambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5","epd":"rnbqkb1r/p2p1ppp/4pn2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E10","name":"Blumenfeld Countergambit Accepted","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. dxe6 fxe6 6. cxb5 d5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 d5e6 f7e6 c4b5 d7d5","epd":"rnbqkb1r/p5pp/4pn2/1Ppp4/8/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E10","name":"Blumenfeld Countergambit: Duz-Khotimirsky Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5","epd":"rnbqkb1r/p2p1ppp/4pn2/1ppP2B1/2P5/5N2/PP2PPPP/RN1QKB1R b KQkq -"},{"eco":"E10","name":"Blumenfeld Countergambit: Spielmann Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 c7c5 d4d5 b7b5 c1g5 e6d5 c4d5 h7h6","epd":"rnbqkb1r/p2p1pp1/5n1p/1ppP2B1/8/5N2/PP2PPPP/RN1QKB1R w KQkq -"},{"eco":"E10","name":"Indian Defense: Anti-Nimzo-Indian","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3","epd":"rnbqkb1r/pppp1ppp/4pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"E10","name":"Indian Defense: Dzindzi-Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 a6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 a7a6","epd":"rnbqkb1r/1ppp1ppp/p3pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E10","name":"Indian Defense: Döry Indian","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f6e4","epd":"rnbqkb1r/pppp1ppp/4p3/8/2PPn3/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Bxd2+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b4d2","epd":"rnbqk2r/pppp1ppp/4pn2/8/2PP4/5N2/PP1bPPPP/RN1QKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Grünfeld Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1d2","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Haiti Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b8c6","epd":"r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Monticelli Trap","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 O-O 8. Nc3 Ne4 9. Qc2 Nxc3 10. Ng5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4d2 d1d2 e8g8 b1c3 f6e4 d2c2 e4c3 f3g5","epd":"rn1q1rk1/pbpp1ppp/1p2p3/6N1/2PP4/2n3P1/PPQ1PPBP/R3K2R b KQ -"},{"eco":"E11","name":"Bogo-Indian Defense: New England Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nfd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 f3d2","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/8/PP1NPPPP/RNBQKB1R b KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Nimzowitsch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 d8e7","epd":"rnb1k2r/ppppqppp/4pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Be7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 b4e7","epd":"rnbqk2r/ppppbppp/4pn2/8/2PP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3","epd":"rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1QK2R b KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQ -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. O-O","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8 e1g1","epd":"rnbq1rk1/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP1BPPBP/RN1Q1RK1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 O-O 7. Qc2 c6 8. O-O","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 e8g8 d1c2 c7c6 e1g1","epd":"rnbq1rk1/pp2bppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RN3RK1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RN3RK1 w - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6 9. b3","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6 b2b3","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/1P3NP1/P1QBPPBP/RN3RK1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6 9. Rc1","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6 f1c1","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RNR3K1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6 9. Rd1","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6 f1d1","epd":"r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQBPPBP/RN1R2K1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Be7 5. Bg2 d5 6. Nf3 Nbd7 7. O-O O-O 8. Qc2 c6 9. Rd1 h6","uci":"d2d4 g8f6 c2c4 e7e6 g2g3 f8b4 c1d2 b4e7 f1g2 d7d5 g1f3 b8d7 e1g1 e8g8 d1c2 c7c6 f1d1 h7h6","epd":"r1bq1rk1/pp1nbpp1/2p1pn1p/3p4/2PP4/5NP1/PPQBPPBP/RN1R2K1 w - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d1c2 b8d7 d2f4 b7b6 b1d2","epd":"r1bq1rk1/p2nbppp/1pp1pn2/3p4/2PP1B2/5NP1/PPQNPPBP/R4RK1 b - -"},{"eco":"E11","name":"Bogo-Indian Defense: Retreat Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O c6 8. Qc2 Nbd7 9. Bf4 b6 10. Nbd2 Ba6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 g2g3 f8b4 c1d2 b4e7 f1g2 e8g8 e1g1 c7c6 d1c2 b8d7 d2f4 b7b6 b1d2 c8a6","epd":"r2q1rk1/p2nbppp/bpp1pn2/3p4/2PP1B2/5NP1/PPQNPPBP/R4RK1 w - -"},{"eco":"E11","name":"Bogo-Indian Defense: Vitolins Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 c7c5","epd":"rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -"},{"eco":"E11","name":"Bogo-Indian Defense: Wade-Smyslov Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 a7a5","epd":"rnbqk2r/1ppp1ppp/4pn2/p7/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov Variation, Botvinnik Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 g5 7. Bg3 Nh5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 c1g5 h7h6 g5h4 g7g5 h4g3 f6h5","epd":"rn1qkb1r/pbpp1p2/1p2p2p/6pn/2PP4/2N2NB1/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 f6e4","epd":"rn1qkb1r/pbpp1ppp/1p2p3/8/2PPn3/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 exd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 e6d5","epd":"rn1qkb1r/pbp2ppp/1p3n2/3p4/3P4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 g7g6","epd":"rn1qkb1r/pbpp1p1p/1p2pnp1/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 d1c2","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1PQ1PPPP/R1B1KB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5","epd":"rn1qkb1r/pbp2ppp/1p2pn2/3p4/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 Be7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 f8e7","epd":"rn1qk2r/pbppbppp/1p2pn2/8/2PP4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1P2PPPP/R1BQKB1R w KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 e2e3","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N1PN2/1P3PPP/R1BQKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. a3 d5 6. cxd5 Nxd5 7. e4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 c8b7 a2a3 d7d5 c4d5 f6d5 e2e4","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/3PP3/P1N2N2/1P3PPP/R1BQKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qa4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 d1a4","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/Q2P4/P1N2N2/1P2PPPP/R1B1KB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Bd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8b7 b1c3 d7d5 c4d5 f6d5 c1d2","epd":"rn1qkb1r/pbp2ppp/1p2p3/3n4/3P4/P1N2N2/1P1BPPPP/R2QKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Miles Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 c1f4","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP1B2/5N2/PP2PPPP/RN1QKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Petrosian Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/P4N2/1P2PPPP/RNBQKB1R b KQkq -"},{"eco":"E12","name":"Queen's Indian Defense: Petrosian Variation, Farago Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 a2a3 c8a6 d1c2 a6b7","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/P4N2/1PQ1PPPP/RNB1KB1R w KQkq -"},{"eco":"E13","name":"Queen's Indian Defense: Kasparov Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Bg5 h6 6. Bh4 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 b1c3 f8b4 c1g5 h7h6 g5h4 c8b7","epd":"rn1qk2r/pbpp1pp1/1p2pn1p/8/1bPP3B/2N2N2/PP2PPPP/R2QKB1R w KQkq -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. 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Nc3","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 b7b6 f1d3 c8b7 e1g1 f8e7 c2c4 e8g8 b1c3","epd":"rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. Nbd2 c5 6. b3 Be7 7. Bb2 d6 8. O-O O-O 9. c4","uci":"d2d4 g8f6 g1f3 e7e6 e2e3 b7b6 f1d3 c8b7 b1d2 c7c5 b2b3 f8e7 c1b2 d7d6 e1g1 e8g8 c2c4","epd":"rn1q1rk1/pb2bppp/1p1ppn2/2p5/2PP4/1P1BPN2/PB1N1PPP/R2Q1RK1 b - -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 b6 5. Nc3 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 e2e3 b7b6 b1c3 c8b7","epd":"rn1qkb1r/pbp2ppp/1p2pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 b6 5. Nc3 Bd6 6. 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Bd3 b6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 e2e3 f8e7 b2b3 e8g8 f1d3 b7b6","epd":"rnbq1rk1/p1p1bppp/1p2pn2/3p4/2PP4/1P1BPN2/P4PPP/RNBQK2R w KQ -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 Be7 5. b3 O-O 6. Bb2 b6 7. Nbd2 Bb7 8. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 d7d5 e2e3 f8e7 b2b3 e8g8 c1b2 b7b6 b1d2 c8b7 f1d3","epd":"rn1q1rk1/pbp1bppp/1p2pn2/3p4/2PP4/1P1BPN2/PB1N1PPP/R2QK2R b KQ -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 b6 5. a3 Bxd2+ 6. Qxd2 Bb7 7. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1d2 b7b6 a2a3 b4d2 d1d2 c8b7 e2e3","epd":"rn1qk2r/pbpp1ppp/1p2pn2/8/2PP4/P3PN2/1P1Q1PPP/R1B1KB1R b KQkq -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 Be7 5. d4 O-O 6. b3 b6 7. cxd5 exd5 8. Bb2 Bb7 9. Bd3","uci":"g1f3 d7d5 e2e3 g8f6 c2c4 e7e6 b1c3 f8e7 d2d4 e8g8 b2b3 b7b6 c4d5 e6d5 c1b2 c8b7 f1d3","epd":"rn1q1rk1/pbp1bppp/1p3n2/3p4/3P4/1PNBPN2/PB3PPP/R2QK2R b KQ -"},{"eco":"E14","name":"Queen's Indian Defense, with e3","pgn":"1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. e3 b6 5. b3 Bb7 6. Bd3 Nbd7 7. O-O Bd6 8. Bb2 O-O 9. Nbd2","uci":"d2d4 g8f6 g1f3 d7d5 c2c4 e7e6 e2e3 b7b6 b2b3 c8b7 f1d3 b8d7 e1g1 f8d6 c1b2 e8g8 b1d2","epd":"r2q1rk1/pbpn1ppp/1p1bpn2/3p4/2PP4/1P1BPN2/PB1N1PPP/R2Q1RK1 b - -"},{"eco":"E14","name":"Queen's Indian Defense, with e3, Bb4+ Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 b6 5. e3 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1d2 b7b6 e2e3 c8b7","epd":"rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -"},{"eco":"E14","name":"Queen's Indian Defense: Averbakh Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 O-O 8. Bb2 cxd4 9. Nxd4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3 c8b7 f1d3 c7c5 e1g1 f8e7 b2b3 e8g8 c1b2 c5d4 f3d4","epd":"rn1q1rk1/pb1pbppp/1p2pn2/8/2PN4/1P1BP3/PB3PPP/RN1Q1RK1 b - -"},{"eco":"E14","name":"Queen's Indian Defense: Spassky System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -"},{"eco":"E14","name":"Queen's Indian Defense: Spassky System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3 c8b7","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -"},{"eco":"E14","name":"Queen's Indian Defense: Spassky System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 e2e3 c8b7 f1d3","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/3BPN2/PP3PPP/RNBQK2R b KQkq -"},{"eco":"E14","name":"Queen's Indian Defense: Spassky System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. 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Ng5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3g5","epd":"rn1qkb1r/pb1p1ppp/1p3n2/2pp2N1/2P5/6P1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3","epd":"rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Check Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3 f8b4","epd":"rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/1P3NP1/P3PP1P/RNBQKB1R w KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb4+ 6. 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Qa4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 d1a4","epd":"rn1qkb1r/p1pp1ppp/bp2pn2/8/Q1PP4/5NP1/PP2PP1P/RNB1KB1R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 b2b3","epd":"rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/1P3NP1/P3PP1P/RNBQKB1R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman's Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qb3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8a6 d1b3","epd":"rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/1Q3NP1/PP2PP1P/RNB1KB1R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5 6. d5 exd5 7. Nh4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5 d4d5 e6d5 f3h4","epd":"rn1qkb1r/pb1p1ppp/1p3n2/2pp4/2P4N/6P1/PP2PPBP/RNBQK2R b KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 c5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 c7c5","epd":"rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E15","name":"Queen's Indian Defense: Fianchetto Variation, Traditional Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7","epd":"rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq -"},{"eco":"E16","name":"Queen's Indian Defense: Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4","epd":"rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E16","name":"Queen's Indian Defense: Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Nbd2 O-O 7. O-O","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 b1d2 e8g8 e1g1","epd":"rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/5NP1/PP1NPPBP/R1BQ1RK1 b - -"},{"eco":"E16","name":"Queen's Indian Defense: Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Nbd2 O-O 7. O-O d5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 b1d2 e8g8 e1g1 d7d5","epd":"rn1q1rk1/pbp2ppp/1p2pn2/3p4/1bPP4/5NP1/PP1NPPBP/R1BQ1RK1 w - -"},{"eco":"E16","name":"Queen's Indian Defense: Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Nbd2 O-O 7. O-O a5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 b1d2 e8g8 e1g1 a7a5","epd":"rn1q1rk1/1bpp1ppp/1p2pn2/p7/1bPP4/5NP1/PP1NPPBP/R1BQ1RK1 w - -"},{"eco":"E16","name":"Queen's Indian Defense: Riumin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4e7","epd":"rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -"},{"eco":"E16","name":"Queen's Indian Defense: Riumin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. O-O O-O 8. Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4e7 e1g1 e8g8 b1c3","epd":"rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP1BPPBP/R2Q1RK1 b - -"},{"eco":"E16","name":"Queen's Indian Defense: Riumin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. O-O O-O 8. Nc3 d5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8b4 c1d2 b4e7 e1g1 e8g8 b1c3 d7d5","epd":"rn1q1rk1/pbp1bppp/1p2pn2/3p4/2PP4/2N2NP1/PP1BPPBP/R2Q1RK1 w - -"},{"eco":"E16","name":"Queen's Indian Defense: Yates Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 b6 6. Bg2 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 c1d2 a7a5 g2g3 b7b6 f1g2 c8b7","epd":"rn1qk2r/1bpp1ppp/1p2pn2/p7/1bPP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -"},{"eco":"E17","name":"Queen's Indian Defense: Anti-Queen's Indian System","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3","epd":"rn1qk2r/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R b KQkq -"},{"eco":"E17","name":"Queen's Indian Defense: Classical Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1","epd":"rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b kq -"},{"eco":"E17","name":"Queen's Indian Defense: Classical Variation, Polugaevsky Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nh4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 d4d5 e6d5 f3h4","epd":"rn1q1rk1/pbppbppp/1p3n2/3p4/2P4N/6P1/PP2PPBP/RNBQ1RK1 b - -"},{"eco":"E17","name":"Queen's Indian Defense: Classical Variation, Taimanov Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. d5 exd5 8. Nd4","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 d4d5 e6d5 f3d4","epd":"rn1q1rk1/pbppbppp/1p3n2/3p4/2PN4/6P1/PP2PPBP/RNBQ1RK1 b - -"},{"eco":"E17","name":"Queen's Indian Defense: Euwe Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. b3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b2b3","epd":"rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -"},{"eco":"E17","name":"Queen's Indian Defense: Fianchetto Variation, Kramnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Re1","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 f1e1","epd":"rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQR1K1 b - -"},{"eco":"E17","name":"Queen's Indian Defense: Opocensky Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. Bd2","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 b1c3 f6e4 c1d2","epd":"rn1qk2r/pbppbppp/1p2p3/8/2PPn3/2N2NP1/PP1BPPBP/R2QK2R b KQkq -"},{"eco":"E17","name":"Queen's Indian Defense: Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7","epd":"rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E18","name":"Queen's Indian Defense: Classical Variation, Tiviakov Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Na6","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 b8a6","epd":"r2q1rk1/pbppbppp/np2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E18","name":"Queen's Indian Defense: Classical Variation, Traditional Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3","epd":"rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"E18","name":"Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 d7d5","epd":"rn1q1rk1/pbp1bppp/1p2pn2/3p4/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E19","name":"Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2 Nxc3 9. Qxc3","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 b7b6 g2g3 c8b7 f1g2 f8e7 e1g1 e8g8 b1c3 f6e4 d1c2 e4c3 c2c3","epd":"rn1q1rk1/pbppbppp/1p2p3/8/2PP4/2Q2NP1/PP2PPBP/R1B2RK1 b - -"},{"eco":"E20","name":"Nimzo-Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq -"},{"eco":"E20","name":"Nimzo-Indian Defense: Dilworth Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e4","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"E20","name":"Nimzo-Indian Defense: Kmoch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -"},{"eco":"E20","name":"Nimzo-Indian Defense: Mikenas Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1d3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2NQ4/PP2PPPP/R1B1KBNR b KQkq -"},{"eco":"E20","name":"Nimzo-Indian Defense: Romanishin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g2g3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq -"},{"eco":"E20","name":"Nimzo-Indian Defense: Romanishin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 O-O 6. Bg2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 g2g3 e8g8 f1g2","epd":"rnbq1rk1/pp1p1ppp/4pn2/2p5/1bPP4/2N2NP1/PP2PPBP/R1BQK2R b KQ -"},{"eco":"E20","name":"Nimzo-Indian Defense: Romanishin Variation, English Hybrid","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. g3 cxd4 6. Nxd4 O-O 7. Bg2 d5 8. cxd5 Nxd5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 g2g3 c5d4 f3d4 e8g8 f1g2 d7d5 c4d5 f6d5","epd":"rnbq1rk1/pp3ppp/4p3/3n4/1b1N4/2N3P1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"E21","name":"Nimzo-Indian Defense: Three Knights Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"E21","name":"Nimzo-Indian Defense: Three Knights Variation, Euwe Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5 f6e4","epd":"rnbqk2r/pp1p1ppp/4p3/2pP4/1bP1n3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"E21","name":"Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 c7c5 d4d5","epd":"rnbqk2r/pp1p1ppp/4pn2/2pP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R b KQkq -"},{"eco":"E21","name":"Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nc3 c5 5. d5 b5","uci":"d2d4 g8f6 c2c4 e7e6 g1f3 f8b4 b1c3 c7c5 d4d5 b7b5","epd":"rnbqk2r/p2p1ppp/4pn2/1ppP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"E22","name":"Nimzo-Indian Defense: Spielmann Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -"},{"eco":"E23","name":"Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxd2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4d2","epd":"r1bqk2r/pp1p1ppp/2n1p3/2P5/1bP5/1QN2N2/PP1nPPPP/R3KB1R w KQkq -"},{"eco":"E23","name":"Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6","epd":"r1bqk2r/pp1p1ppp/2n1pn2/2P5/1bP5/1QN5/PP2PPPP/R1B1KBNR w KQkq -"},{"eco":"E23","name":"Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5","epd":"r1bqk2r/pp1p1ppp/2n1p3/2n5/1bP5/1QN2N2/PP1BPPPP/R3KB1R w KQkq -"},{"eco":"E23","name":"Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 c5 5. dxc5 Nc6 6. Nf3 Ne4 7. Bd2 Nxc5 8. Qc2 f5 9. g3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1b3 c7c5 d4c5 b8c6 g1f3 f6e4 c1d2 e4c5 b3c2 f7f5 g2g3","epd":"r1bqk2r/pp1p2pp/2n1p3/2n2p2/1bP5/2N2NP1/PPQBPP1P/R3KB1R b KQkq -"},{"eco":"E24","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/P1N5/1P2PPPP/R1BQKBNR b KQkq -"},{"eco":"E24","name":"Nimzo-Indian Defense: Sämisch Variation, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. e3 O-O 8. cxd5 Nxd5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 e2e3 e8g8 c4d5 f6d5","epd":"rnbq1rk1/pp3ppp/4p3/2pn4/3P4/P1P1PP2/6PP/R1BQKBNR w KQ -"},{"eco":"E25","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5","epd":"rnbqk2r/pp3ppp/4pn2/2pP4/3P4/P1P2P2/4P1PP/R1BQKBNR b KQkq -"},{"eco":"E25","name":"Nimzo-Indian Defense: Sämisch Variation, Keres Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5 f6d5 d4c5","epd":"rnbqk2r/pp3ppp/4p3/2Pn4/8/P1P2P2/4P1PP/R1BQKBNR b KQkq -"},{"eco":"E25","name":"Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. cxd5 Nxd5 8. dxc5 f5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 f2f3 d7d5 a2a3 b4c3 b2c3 c7c5 c4d5 f6d5 d4c5 f7f5","epd":"rnbqk2r/pp4pp/4p3/2Pn1p2/8/P1P2P2/4P1PP/R1BQKBNR w KQkq -"},{"eco":"E26","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 e2e3","epd":"rnbqk2r/pp1p1ppp/4pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR b KQkq -"},{"eco":"E26","name":"Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 c7c5 e2e3 b7b6","epd":"rnbqk2r/p2p1ppp/1p2pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR w KQkq -"},{"eco":"E27","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 a2a3 b4c3 b2c3 e8g8","epd":"rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR w KQ -"},{"eco":"E28","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. a3 Bxc3+ 6. bxc3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 a2a3 b4c3 b2c3","epd":"rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P1P3/5PPP/R1BQKBNR b KQ -"},{"eco":"E29","name":"Nimzo-Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 a2a3 b4c3 b2c3 e8g8","epd":"r1bq1rk1/pp1p1ppp/2n1pn2/2p5/2PP4/P1PBP3/5PPP/R1BQK1NR w KQ -"},{"eco":"E29","name":"Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. a3 Bxc3+ 7. bxc3 O-O 8. Ne2 b6 9. e4 Ne8","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 a2a3 b4c3 b2c3 e8g8 g1e2 b7b6 e3e4 f6e8","epd":"r1bqnrk1/p2p1ppp/1pn1p3/2p5/2PPP3/P1PB4/4NPPP/R1BQK2R w KQ -"},{"eco":"E30","name":"Nimzo-Indian Defense: Leningrad Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5","epd":"rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq -"},{"eco":"E30","name":"Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 b5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 b7b5","epd":"rnbqk2r/p2p1pp1/4pn1p/1ppP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"E31","name":"Nimzo-Indian Defense: Leningrad Variation, Benoni Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 d6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 c1g5 h7h6 g5h4 c7c5 d4d5 d7d6","epd":"rnbqk2r/pp3pp1/3ppn1p/2pP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -"},{"eco":"E32","name":"Nimzo-Indian Defense: Classical Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq -"},{"eco":"E32","name":"Nimzo-Indian Defense: Classical Variation, Keres Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 a2a3 b4c3 c2c3 b7b6","epd":"rnbq1rk1/p1pp1ppp/1p2pn2/8/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ -"},{"eco":"E32","name":"Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 a2a3 b4c3 c2c3 b7b5","epd":"rnbq1rk1/p1pp1ppp/4pn2/1p6/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ -"},{"eco":"E33","name":"Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3 d7d6","epd":"r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R w KQkq -"},{"eco":"E33","name":"Nimzo-Indian Defense: Classical Variation, Zurich Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6","epd":"r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E33","name":"Nimzo-Indian Defense: Classical Variation, Zurich Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3","epd":"r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R b KQkq -"},{"eco":"E33","name":"Nimzo-Indian Defense: Classical Variation, Zurich Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 O-O 6. e3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3 e8g8 e2e3","epd":"r1bq1rk1/pppp1ppp/2n1pn2/8/1bPP4/2N1PN2/PPQ2PPP/R1B1KB1R b KQ -"},{"eco":"E33","name":"Nimzo-Indian Defense: Classical Variation, Zurich Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 Nc6 5. Nf3 d6 6. Bd2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 b8c6 g1f3 d7d6 c1d2","epd":"r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQBPPPP/R3KB1R b KQkq -"},{"eco":"E34","name":"Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Qxd5 6. Nf3 Qf5 7. Qd1 e5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 d8d5 g1f3 d5f5 c2d1 e6e5","epd":"rnb1k2r/ppp2ppp/5n2/4pq2/1b1P4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -"},{"eco":"E34","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5","epd":"rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E35","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 c4d5 e6d5","epd":"rnbqk2r/ppp2ppp/5n2/3p4/1b1P4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E36","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3","epd":"rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQkq -"},{"eco":"E36","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 b8c6","epd":"r1bqk2r/ppp2ppp/2n1pn2/3p4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq -"},{"eco":"E36","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4","epd":"rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P1Q5/1P2PPPP/R1B1KBNR w KQkq -"},{"eco":"E36","name":"Nimzo-Indian Defense: Classical Variation, Romanishin Gambit","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 c7c5","epd":"rnbqk2r/pp3ppp/4pn2/2pp4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq -"},{"eco":"E37","name":"Nimzo-Indian Defense: Classical Variation, Modern Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2 c7c5","epd":"rnbqk2r/pp3ppp/4p3/2pp4/2PPn3/P7/1PQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E37","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2","epd":"rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P7/1PQ1PPPP/R1B1KBNR b KQkq -"},{"eco":"E37","name":"Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 Ne4 7. Qc2 Nc6 8. e3 e5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 d7d5 a2a3 b4c3 c2c3 f6e4 c3c2 b8c6 e2e3 e6e5","epd":"r1bqk2r/ppp2ppp/2n5/3pp3/2PPn3/P3P3/1PQ2PPP/R1B1KBNR w KQkq -"},{"eco":"E38","name":"Nimzo-Indian Defense: Classical Variation, Berlin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5","epd":"rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E38","name":"Nimzo-Indian Defense: Classical Variation, Berlin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e3 d5 6. Nf3 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 e8g8 e2e3 d7d5 g1f3 c7c5","epd":"rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2N1PN2/PPQ2PPP/R1B1KB1R w KQ -"},{"eco":"E38","name":"Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc3+","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 b4c3","epd":"rnbqk2r/pp1p1ppp/4pn2/2P5/2P5/2b5/PPQ1PPPP/R1B1KBNR w KQkq -"},{"eco":"E39","name":"Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 e8g8 a2a3 b4c5 g1f3 b7b6","epd":"rnbq1rk1/p2p1ppp/1p2pn2/2b5/2P5/P1N2N2/1PQ1PPPP/R1B1KB1R w KQ -"},{"eco":"E39","name":"Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 d1c2 c7c5 d4c5 e8g8","epd":"rnbq1rk1/pp1p1ppp/4pn2/2P5/1bP5/2N5/PPQ1PPPP/R1B1KBNR w KQ -"},{"eco":"E40","name":"Nimzo-Indian Defense: Rubinstein System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3","epd":"rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"E40","name":"Nimzo-Indian Defense: Rubinstein System, Taimanov Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b8c6","epd":"r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"E41","name":"Nimzo-Indian Defense: Rubinstein System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5","epd":"rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"E41","name":"Nimzo-Indian Defense: Rubinstein System, Hübner Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 g1f3 b4c3 b2c3 d7d6","epd":"r1bqk2r/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQK2R w KQkq -"},{"eco":"E41","name":"Nimzo-Indian Defense: Rubinstein System, Hübner Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 6. Nf3 Bxc3+ 7. bxc3 d6 8. O-O O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 f1d3 b8c6 g1f3 b4c3 b2c3 d7d6 e1g1 e8g8","epd":"r1bq1rk1/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQ1RK1 w - -"},{"eco":"E42","name":"Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2","epd":"rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -"},{"eco":"E42","name":"Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. a3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2 c5d4 e3d4 e8g8 a2a3","epd":"rnbq1rk1/pp1p1ppp/4pn2/8/1bPP4/P1N5/1P2NPPP/R1BQKB1R b KQ -"},{"eco":"E42","name":"Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Ne2 cxd4 6. exd4 O-O 7. c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 c7c5 g1e2 c5d4 e3d4 e8g8 c4c5","epd":"rnbq1rk1/pp1p1ppp/4pn2/2P5/1b1P4/2N5/PP2NPPP/R1BQKB1R b KQ -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6","epd":"rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3","epd":"rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R b KQkq -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8","epd":"rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1","epd":"rn1q1rk1/pbpp1ppp/1p2pn2/8/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 c7c5","epd":"rn1q1rk1/pb1p1ppp/1p2pn2/2p5/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 8. Na4 cxd4 9. a3 Be7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 c7c5 c3a4 c5d4 a2a3 b4e7","epd":"rn1q1rk1/pb1pbppp/1p2pn2/8/N1Pp4/P2BPN2/1P3PPP/R1BQ1RK1 w - -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Ne4 5. Qc2 f5 6. Nf3 b6 7. Bd3 Bb7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 f6e4 d1c2 f7f5 g1f3 b7b6 f1d3 c8b7","epd":"rn1qk2r/pbpp2pp/1p2p3/5p2/1bPPn3/2NBPN2/PPQ2PPP/R1B1K2R w KQkq -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 b6 7. O-O Bb7 8. Na4 Qe7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 c7c5 g1f3 b7b6 e1g1 c8b7 c3a4 d8e7","epd":"rn3rk1/pb1pqppp/1p2pn2/2p5/NbPP4/3BPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 Bxc3+ 5. bxc3 b6 6. e3 Bb7 7. Bd3 O-O 8. O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b4c3 b2c3 b7b6 e2e3 c8b7 f1d3 e8g8 e1g1","epd":"rn1q1rk1/pbpp1ppp/1p2pn2/8/2PP4/2PBPN2/P4PPP/R1BQ1RK1 b - -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b7b6 e2e3 f6e4 d1c2","epd":"rnbqk2r/p1pp1ppp/1p2p3/8/1bPPn3/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2 Bb7 7. Bd3 Bxc3+ 8. bxc3 f5 9. O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 g1f3 b7b6 e2e3 f6e4 d1c2 c8b7 f1d3 b4c3 b2c3 f7f5 e1g1","epd":"rn1qk2r/pbpp2pp/1p2p3/5p2/2PPn3/2PBPN2/P1Q2PPP/R1B2RK1 b kq -"},{"eco":"E43","name":"Nimzo-Indian Defense: St. Petersburg Variation, with Ne4","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 f6e4","epd":"rn1qk2r/pbpp1ppp/1p2p3/8/1bPPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq -"},{"eco":"E44","name":"Nimzo-Indian Defense: St. Petersburg Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2","epd":"rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -"},{"eco":"E44","name":"Nimzo-Indian Defense: St. Petersburg Variation, American Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ne4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2 f6e4","epd":"rnbqk2r/p1pp1ppp/1p2p3/8/1bPPn3/2N1P3/PP2NPPP/R1BQKB1R w KQkq -"},{"eco":"E44","name":"Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 c5 6. a3 Ba5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2 c7c5 a2a3 b4a5","epd":"rnbqk2r/p2p1ppp/1p2pn2/b1p5/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQkq -"},{"eco":"E45","name":"Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Ba6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 g1e2 c8a6","epd":"rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R w KQkq -"},{"eco":"E46","name":"Nimzo-Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8","epd":"rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQ -"},{"eco":"E46","name":"Nimzo-Indian Defense: Reshevsky Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2","epd":"rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQ -"},{"eco":"E46","name":"Nimzo-Indian Defense: Simagin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Ne2 d5 6. a3 Bd6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1e2 d7d5 a2a3 b4d6","epd":"rnbq1rk1/ppp2ppp/3bpn2/3p4/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQ -"},{"eco":"E47","name":"Nimzo-Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3","epd":"rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2NBP3/PP3PPP/R1BQK1NR b KQ -"},{"eco":"E48","name":"Nimzo-Indian Defense: Normal Variation, Classical Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5","epd":"rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2NBP3/PP3PPP/R1BQK1NR w KQ -"},{"eco":"E48","name":"Nimzo-Indian Defense: Ragozin Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b8c6 e1g1","epd":"r1bq1rk1/ppp2ppp/2n1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"E49","name":"Nimzo-Indian Defense: Normal Variation, Botvinnik System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 a2a3 b4c3 b2c3","epd":"rnbq1rk1/ppp2ppp/4pn2/3p4/2PP4/P1PBP3/5PPP/R1BQK1NR b KQ -"},{"eco":"E50","name":"Nimzo-Indian Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3","epd":"rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1PN2/PP3PPP/R1BQKB1R b KQ -"},{"eco":"E51","name":"Nimzo-Indian Defense: Normal Variation, Ragozin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5","epd":"rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ -"},{"eco":"E51","name":"Nimzo-Indian Defense: Normal Variation, Ragozin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd2 Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 c1d2 b8c6","epd":"r1bq1rk1/ppp2ppp/2n1pn2/3p4/1bPP4/2N1PN2/PP1B1PPP/R2QKB1R w KQ -"},{"eco":"E51","name":"Nimzo-Indian Defense: Normal Variation, Ragozin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. Bd2 Nc6 7. a3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 c1d2 b8c6 a2a3","epd":"r1bq1rk1/ppp2ppp/2n1pn2/3p4/1bPP4/P1N1PN2/1P1B1PPP/R2QKB1R b KQ -"},{"eco":"E51","name":"Nimzo-Indian Defense: Normal Variation, Sämisch Deferred","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 d5 6. a3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 g1f3 d7d5 a2a3","epd":"rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/P1N1PN2/1P3PPP/R1BQKB1R b KQ -"},{"eco":"E51","name":"Nimzo-Indian Defense: Ragozin Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 Nc6 7. O-O dxc4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b8c6 e1g1 d5c4","epd":"r1bq1rk1/ppp2ppp/2n1pn2/8/1bpP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E52","name":"Nimzo-Indian Defense: Normal Variation, Schlechter Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 b7b6","epd":"rnbq1rk1/p1p2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -"},{"eco":"E52","name":"Nimzo-Indian Defense: Normal Variation, Schlechter Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O d5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 b7b6 f1d3 c8b7 g1f3 e8g8 e1g1 d7d5","epd":"rn1q1rk1/pbp2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E53","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5","epd":"rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -"},{"eco":"E53","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8d7","epd":"r1bq1rk1/pp1n1ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E53","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O b6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b7b6","epd":"rnbq1rk1/p4ppp/1p2pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E54","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4","epd":"rnbq1rk1/pp3ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"E54","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 cxd4 9. exd4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4 c5d4 e3d4","epd":"rnbq1rk1/pp3ppp/4pn2/8/1bBP4/2N2N2/PP3PPP/R1BQ1RK1 b - -"},{"eco":"E54","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Qe7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4 d8e7","epd":"rnb2rk1/pp2qppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E55","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nbd7","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 d5c4 d3c4 b8d7","epd":"r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E56","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6","epd":"r1bq1rk1/pp3ppp/2n1pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -"},{"eco":"E57","name":"Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 dxc4 9. Bxc4 cxd4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6 a2a3 d5c4 d3c4 c5d4","epd":"r1bq1rk1/pp3ppp/2n1pn2/8/1bBp4/P1N1PN2/1P3PPP/R1BQ1RK1 w - -"},{"eco":"E58","name":"Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3","epd":"r1bq1rk1/pp3ppp/2n1pn2/2pp4/2PP4/P1PBPN2/5PPP/R1BQ1RK1 b - -"},{"eco":"E59","name":"Nimzo-Indian Defense: Normal Variation, Bernstein Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3 Bxc3 9. bxc3 dxc4 10. Bxc4","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 g1f3 c7c5 e1g1 b8c6 a2a3 b4c3 b2c3 d5c4 d3c4","epd":"r1bq1rk1/pp3ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 b - -"},{"eco":"E59","name":"Nimzo-Indian Defense: Normal Variation, Bernstein Defense","pgn":"1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Nf3 Nc6 10. O-O Qc7 11. Qc2","uci":"d2d4 g8f6 c2c4 e7e6 b1c3 f8b4 e2e3 e8g8 f1d3 d7d5 a2a3 b4c3 b2c3 d5c4 d3c4 c7c5 g1f3 b8c6 e1g1 d8c7 d1c2","epd":"r1b2rk1/ppq2ppp/2n1pn2/2p5/2BP4/P1P1PN2/2Q2PPP/R1B2RK1 b - -"},{"eco":"E60","name":"Grünfeld Defense: Counterthrust Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 d7d5","epd":"rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -"},{"eco":"E60","name":"Indian Defense: Anti-Grünfeld, Adorjan Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. d5 b5","uci":"d2d4 g8f6 c2c4 g7g6 d4d5 b7b5","epd":"rnbqkb1r/p1pppp1p/5np1/1p1P4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"E60","name":"Indian Defense: Anti-Grünfeld, Advance Variation","pgn":"1. d4 Nf6 2. c4 g6 3. d5","uci":"d2d4 g8f6 c2c4 g7g6 d4d5","epd":"rnbqkb1r/pppppp1p/5np1/3P4/2P5/8/PP2PPPP/RNBQKBNR b KQkq -"},{"eco":"E60","name":"Indian Defense: Anti-Grünfeld, Alekhine Variation","pgn":"1. d4 Nf6 2. c4 g6 3. f3","uci":"d2d4 g8f6 c2c4 g7g6 f2f3","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/5P2/PP2P1PP/RNBQKBNR b KQkq -"},{"eco":"E60","name":"Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. f3 e5","uci":"d2d4 g8f6 c2c4 g7g6 f2f3 e7e5","epd":"rnbqkb1r/pppp1p1p/5np1/4p3/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq -"},{"eco":"E60","name":"Indian Defense: Anti-Grünfeld, Basman-Williams Attack","pgn":"1. d4 Nf6 2. c4 g6 3. h4","uci":"d2d4 g8f6 c2c4 g7g6 h2h4","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP3P/8/PP2PPP1/RNBQKBNR b KQkq -"},{"eco":"E60","name":"Indian Defense: West Indian Defense","pgn":"1. d4 Nf6 2. c4 g6","uci":"d2d4 g8f6 c2c4 g7g6","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -"},{"eco":"E60","name":"King's Indian Defense: Fianchetto Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3","epd":"rnbqk2r/ppppppbp/5np1/8/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq -"},{"eco":"E60","name":"King's Indian Defense: Fianchetto Variation, Immediate Fianchetto","pgn":"1. d4 Nf6 2. c4 g6 3. g3","uci":"d2d4 g8f6 c2c4 g7g6 g2g3","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -"},{"eco":"E60","name":"King's Indian Defense: Normal Variation, King's Knight Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. c4","uci":"d2d4 g8f6 g1f3 g7g6 c2c4","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -"},{"eco":"E60","name":"King's Indian Defense: Santasiere Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. b4","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 b2b4","epd":"rnbqk2r/ppppppbp/5np1/8/1PPP4/5N2/P3PPPP/RNBQKB1R b KQkq -"},{"eco":"E60","name":"King's Indian Defense: Semi-Classical Variation, Benoni Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 c7c6","epd":"rnbq1rk1/pp2ppbp/2pp1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E60","name":"King's Indian Defense: Semi-Classical Variation, Hollywood Variation","pgn":"1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e3 d6 6. Be2 Nc6","uci":"d2d4 g8f6 g1f3 g7g6 c2c4 f8g7 b1c3 e8g8 e2e3 d7d6 f1e2 b8c6","epd":"r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E60","name":"Queen's Pawn, Mengarini Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Qc2","uci":"d2d4 g8f6 c2c4 g7g6 d1c2","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PPQ1PPPP/RNB1KBNR b KQkq -"},{"eco":"E61","name":"King's Indian Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3","epd":"rnbqkb1r/pppppp1p/5np1/8/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -"},{"eco":"E61","name":"King's Indian Defense: Fianchetto Variation, Benjamin Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Qb6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 d8b6","epd":"rnb2rk1/pp2ppbp/1qpp1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E61","name":"King's Indian Defense: Semi-Classical Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PP4/2N1PN2/PP2BPPP/R1BQK2R b KQ -"},{"eco":"E61","name":"King's Indian Defense: Semi-Classical Variation, Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. dxe5 dxe5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 b8d7 e1g1 e7e5 d4e5 d6e5","epd":"r1bq1rk1/pppn1pbp/5np1/4p3/2P5/2N1PN2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E61","name":"King's Indian Defense: Semi-Classical Variation, Queenside Storm Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. e3 d6 6. Be2 Nbd7 7. O-O e5 8. b4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 e8g8 e2e3 d7d6 f1e2 b8d7 e1g1 e7e5 b2b4","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/1PPP4/2N1PN2/P3BPPP/R1BQ1RK1 b - -"},{"eco":"E61","name":"King's Indian Defense: Smyslov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 c1g5","epd":"rnbqk2r/ppp1ppbp/3p1np1/6B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Carlsbad Variation","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8c6","epd":"r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Delayed Fianchetto","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Kavalek Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c6 7. Nc3 Qa5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c6 b1c3 d8a5","epd":"rnb2rk1/pp2ppbp/2pp1np1/q7/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Larsen Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 c6 7. O-O Bf5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 c7c6 e1g1 c8f5","epd":"rn1q1rk1/pp2ppbp/2pp1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky)","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O Bf5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8c6 e1g1 c8f5","epd":"r2q1rk1/ppp1ppbp/2np1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Simagin Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nc6 7. O-O Bg4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8c6 e1g1 c8g4","epd":"r2q1rk1/ppp1ppbp/2np1np1/8/2PP2b1/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E62","name":"King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 e5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 e7e5","epd":"r1bq1rk1/ppp2pbp/2np1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E63","name":"King's Indian Defense: Fianchetto Variation, Panno Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6","epd":"r1bq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E63","name":"King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 e5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 d4d5 c6a5 f3d2 c7c5 d1c2 e7e5","epd":"r1bq1rk1/1p3pbp/p2p1np1/n1pPp3/2P5/2N3P1/PPQNPPBP/R1B2RK1 w - e6"},{"eco":"E63","name":"King's Indian Defense: Fianchetto Variation, Panno Variation, Donner Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5 Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 Bh6","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 d4d5 c6a5 f3d2 c7c5 d1c2 a8b8 b2b3 b7b5 c1b2 b5c4 b3c4 g7h6","epd":"1rbq1rk1/4pp1p/p2p1npb/n1pP4/2P5/2N3P1/PBQNPPBP/R4RK1 w - -"},{"eco":"E63","name":"King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. h3 Rb8 9. Be3 b5 10. Nd2","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8c6 b1c3 a7a6 h2h3 a8b8 c1e3 b7b5 f3d2","epd":"1rbq1rk1/2p1ppbp/p1np1np1/1p6/2PP4/2N1B1PP/PP1NPPB1/R2Q1RK1 b - -"},{"eco":"E64","name":"King's Indian Defense: Fianchetto Variation, Double Fianchetto Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 e5 8. b3","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 b8d7 b1c3 e7e5 b2b3","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b - -"},{"eco":"E64","name":"King's Indian Defense: Fianchetto Variation, Hungarian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O Nbd7 7. Nc3 a6","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 b8d7 b1c3 a7a6","epd":"r1bq1rk1/1ppnppbp/p2p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E64","name":"King's Indian Defense: Fianchetto Variation, Pterodactyl Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c5 5. Bg2 Qa5+","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 c7c5 f1g2 d8a5","epd":"rnb1k2r/pp1pppbp/5np1/q1p5/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -"},{"eco":"E64","name":"King's Indian Defense: Fianchetto Variation, Yugoslav System","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 d6 5. Bg2 O-O 6. O-O c5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 d7d6 f1g2 e8g8 e1g1 c7c5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -"},{"eco":"E64","name":"King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 c5","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 c7c5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"E65","name":"King's Indian Defense: Fianchetto Variation, Yugoslav Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"E65","name":"King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. dxc5 dxc5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3 b8c6 d4c5 d6c5","epd":"r1bq1rk1/pp2ppbp/2n2np1/2p5/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E66","name":"King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 c7c5 b1c3 b8c6 d4d5","epd":"r1bq1rk1/pp2ppbp/2np1np1/2pP4/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 b - -"},{"eco":"E67","name":"King's Indian Defense: Fianchetto Variation, Classical Fianchetto","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -"},{"eco":"E67","name":"King's Indian Defense: Fianchetto Variation, Debrecen Defense","pgn":"1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7","uci":"d2d4 g8f6 c2c4 g7g6 g2g3 f8g7 f1g2 e8g8 b1c3 d7d6 g1f3 b8d7","epd":"r1bq1rk1/pppnppbp/3p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -"},{"eco":"E68","name":"King's Indian Defense: Fianchetto Variation, Classical Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5 e2e4","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2NP1/PP3PBP/R1BQ1RK1 b - -"},{"eco":"E68","name":"King's Indian Defense: Fianchetto Variation, Long Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 O-O 6. Bg2 Nbd7 7. O-O e5 8. e4 Re8 9. h3 exd4 10. Nxd4 Nc5 11. Re1 a5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 g1f3 d7d6 g2g3 e8g8 f1g2 b8d7 e1g1 e7e5 e2e4 f8e8 h2h3 e5d4 f3d4 d7c5 f1e1 a7a5","epd":"r1bqr1k1/1pp2pbp/3p1np1/p1n5/2PNP3/2N3PP/PP3PB1/R1BQR1K1 w - -"},{"eco":"E69","name":"King's Indian Defense: Fianchetto Variation, Classical Main Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nbd7 7. Nc3 e5 8. e4 c6 9. h3","uci":"d2d4 g8f6 c2c4 g7g6 g1f3 f8g7 g2g3 e8g8 f1g2 d7d6 e1g1 b8d7 b1c3 e7e5 e2e4 c7c6 h2h3","epd":"r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NPP/PP3PB1/R1BQ1RK1 b - -"},{"eco":"E70","name":"King's Indian Defense: Accelerated Averbakh Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 c1g5","epd":"rnbqk2r/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP3PPP/R2QKBNR b KQkq -"},{"eco":"E70","name":"King's Indian Defense: Kramer Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1e2","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2NPPP/R1BQKB1R b KQkq -"},{"eco":"E70","name":"King's Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4","epd":"rnbqk2r/ppppppbp/5np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -"},{"eco":"E70","name":"King's Indian Defense: Normal Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -"},{"eco":"E71","name":"King's Indian Defense: Karpov System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 h2h3 e8g8 c1e3","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1B2P/PP3PP1/R2QKBNR b KQ -"},{"eco":"E71","name":"King's Indian Defense: Makogonov Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 h2h3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N4P/PP3PP1/R1BQKBNR b KQkq -"},{"eco":"E72","name":"King's Indian Defense: Normal Variation, Deferred Fianchetto","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N3P1/PP3P1P/R1BQKBNR b KQkq -"},{"eco":"E72","name":"King's Indian Defense: Pomar System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. g3 O-O 6. Bg2 e5 7. Nge2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g2g3 e8g8 f1g2 e7e5 g1e2","epd":"rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N3P1/PP2NPBP/R1BQK2R b KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5","epd":"rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR b KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Flexible Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 h7h6","epd":"rnbq1rk1/ppp1ppb1/3p1npp/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Geller Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nbd7","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8d7","epd":"r1bq1rk1/pppnppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Modern Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8a6","epd":"r1bq1rk1/ppp1ppbp/n2p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Modern Defense, Burgess Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 7. Qd2 c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8a6 d1d2 c7c6","epd":"r1bq1rk1/pp2ppbp/n1pp1np1/6B1/2PPP3/2N5/PP1QBPPP/R3K1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Nc6 Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Nc6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 b8c6","epd":"r1bq1rk1/ppp1ppbp/2np1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Averbakh Variation, Spanish Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 a6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 a7a6","epd":"rnbq1rk1/1pp1ppbp/p2p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E73","name":"King's Indian Defense: Normal Variation, Standard Development","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2BPPP/R1BQK1NR b KQkq -"},{"eco":"E73","name":"King's Indian Defense: Semi-Averbakh System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1e3","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1B3/PP2BPPP/R2QK1NR b KQ -"},{"eco":"E74","name":"King's Indian Defense: Averbakh Variation, Benoni Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p3B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E74","name":"King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4d5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR b KQ -"},{"eco":"E74","name":"King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. dxc5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4c5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2P3B1/2P1P3/2N5/PP2BPPP/R2QK1NR b KQ -"},{"eco":"E75","name":"King's Indian Defense: Averbakh Variation, Main Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 c1g5 c7c5 d4d5 e7e6","epd":"rnbq1rk1/pp3pbp/3ppnp1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR w KQ -"},{"eco":"E76","name":"King's Indian Defense: Four Pawns Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR b KQkq -"},{"eco":"E76","name":"King's Indian Defense: Four Pawns Attack, Dynamic Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2pP4/2P1PP2/2N2N2/PP4PP/R1BQKB1R b KQ -"},{"eco":"E76","name":"King's Indian Defense: Four Pawns Attack, Modern Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 Na6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 b8a6","epd":"r1bqk2r/ppp1ppbp/n2p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR w KQkq -"},{"eco":"E77","name":"King's Indian Defense: Four Pawns Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. f4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f1e2 e8g8 f2f4","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP2B1PP/R1BQK1NR b KQ -"},{"eco":"E77","name":"King's Indian Defense: Four Pawns Attack, Florentine Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. e5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2 e6d5 e4e5","epd":"rnbq1rk1/pp3pbp/3p1np1/2ppP3/2P2P2/2N2N2/PP2B1PP/R1BQK2R b KQ -"},{"eco":"E77","name":"King's Indian Defense: Four Pawns Attack, Normal Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. d5 e6 8. Be2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 d4d5 e7e6 f1e2","epd":"rnbq1rk1/pp3pbp/3ppnp1/2pP4/2P1PP2/2N2N2/PP2B1PP/R1BQK2R b KQ -"},{"eco":"E77","name":"King's Indian Defense: Six Pawns Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Be2 c5 7. d5 e6 8. dxe6 fxe6 9. g4 Nc6 10. h4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 f1e2 c7c5 d4d5 e7e6 d5e6 f7e6 g2g4 b8c6 h2h4","epd":"r1bq1rk1/pp4bp/2nppnp1/2p5/2P1PPPP/2N5/PP2B3/R1BQK1NR b KQ -"},{"eco":"E78","name":"King's Indian Defense: Four Pawns Attack, Fluid Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 f1e2","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPPP2/2N2N2/PP2B1PP/R1BQK2R b KQ -"},{"eco":"E79","name":"King's Indian Defense: Four Pawns Attack, Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 O-O 6. Nf3 c5 7. Be2 cxd4 8. Nxd4 Nc6 9. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f4 e8g8 g1f3 c7c5 f1e2 c5d4 f3d4 b8c6 c1e3","epd":"r1bq1rk1/pp2ppbp/2np1np1/8/2PNPP2/2N1B3/PP2B1PP/R2QK2R b KQ -"},{"eco":"E80","name":"King's Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR b KQkq -"},{"eco":"E81","name":"King's Indian Defense: Steiner Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5","epd":"rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2P2/PP4PP/R2QKBNR b KQ -"},{"eco":"E81","name":"King's Indian Defense: Steiner Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5 h6 8. Bf4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5 c7c5 d4d5 h7h6 g5f4","epd":"rnbq1rk1/pp2ppb1/3p1npp/2pP4/2P1PB2/2N2P2/PP4PP/R2QKBNR b KQ -"},{"eco":"E81","name":"King's Indian Defense: Steiner Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. Nxd5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5 c7c5 d4d5 e7e6 d1d2 e6d5 c3d5","epd":"rnbq1rk1/pp3pbp/3p1np1/2pN2B1/2P1P3/5P2/PP1Q2PP/R3KBNR b KQ -"},{"eco":"E81","name":"King's Indian Defense: Steiner Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Bg5 c5 7. d5 e6 8. Qd2 h6 9. Bxh6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1g5 c7c5 d4d5 e7e6 d1d2 h7h6 g5h6","epd":"rnbq1rk1/pp3pb1/3ppnpB/2pP4/2P1P3/2N2P2/PP1Q2PP/R3KBNR b KQ -"},{"eco":"E81","name":"King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Nge2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 g1e2","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP2N1PP/R1BQKB1R b KQ -"},{"eco":"E81","name":"King's Indian Defense: Sämisch Variation, Byrne Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c6 7. Bd3 a6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c6 f1d3 a7a6","epd":"rnbq1rk1/1p2ppbp/p1pp1np1/8/2PPP3/2NBBP2/PP4PP/R2QK1NR w KQ -"},{"eco":"E81","name":"King's Indian Defense: Sämisch Variation, Normal Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR w KQ -"},{"eco":"E81","name":"King's Indian Defense: Sämisch Variation, Sämisch Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c5","epd":"rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -"},{"eco":"E81","name":"King's Indian Defense: Sämisch Variation, Sämisch Gambit Accepted","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 c5 7. dxc5 dxc5 8. Qxd8 Rxd8 9. Bxc5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 c7c5 d4c5 d6c5 d1d8 f8d8 e3c5","epd":"rnbr2k1/pp2ppbp/5np1/2B5/2P1P3/2N2P2/PP4PP/R3KBNR b KQ -"},{"eco":"E82","name":"King's Indian Defense: Sämisch Variation, Double Fianchetto","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 b6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b7b6","epd":"rnbq1rk1/p1p1ppbp/1p1p1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -"},{"eco":"E83","name":"King's Indian Defense: Sämisch Variation, Panno Formation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6","epd":"r1bq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -"},{"eco":"E83","name":"King's Indian Defense: Sämisch Variation, Ruban Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 Rb8","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a8b8","epd":"1rbq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -"},{"eco":"E83","name":"King's Indian Defense: Sämisch Variation, Yates Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6","epd":"r1bq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -"},{"eco":"E84","name":"King's Indian Defense: Sämisch Variation, Panno Main Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nc6 7. Nge2 a6 8. Qd2 Rb8","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 b8c6 g1e2 a7a6 d1d2 a8b8","epd":"1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ -"},{"eco":"E85","name":"King's Indian Defense: Sämisch Variation, Orthodox Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5","epd":"rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -"},{"eco":"E86","name":"King's Indian Defense: Sämisch Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 g1e2 c7c6","epd":"rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -"},{"eco":"E87","name":"King's Indian Defense: Sämisch Variation, Bronstein Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 f6h5 d1d2 d8h4 g2g3 h5g3 d2f2 g3f1 f2h4 f1e3 e1e2","epd":"rnb2rk1/ppp2pbp/3p2p1/3Pp3/2P1P2Q/2N1nP2/PP2K2P/R5NR b - -"},{"eco":"E87","name":"King's Indian Defense: Sämisch Variation, Closed Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5","epd":"rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR b KQ -"},{"eco":"E87","name":"King's Indian Defense: Sämisch Variation, Orthodox Variation, Bronstein Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 Nh5 8. Qd2 Qh4+ 9. g3 Nxg3 10. Qf2 Nxf1 11. Qxh4 Nxe3 12. Ke2 Nxc4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 f6h5 d1d2 d8h4 g2g3 h5g3 d2f2 g3f1 f2h4 f1e3 e1e2 e3c4","epd":"rnb2rk1/ppp2pbp/3p2p1/3Pp3/2n1P2Q/2N2P2/PP2K2P/R5NR w - -"},{"eco":"E88","name":"King's Indian Defense: Sämisch Variation, Closed Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. d5 c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 d4d5 c7c6","epd":"rnbq1rk1/pp3pbp/2pp1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR w KQ -"},{"eco":"E89","name":"King's Indian Defense: Sämisch Variation, Closed Variation, Main Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 e5 7. Nge2 c6 8. d5 cxd5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 f2f3 e8g8 c1e3 e7e5 g1e2 c7c6 d4d5 c6d5","epd":"rnbq1rk1/pp3pbp/3p1np1/3pp3/2P1P3/2N1BP2/PP2N1PP/R2QKB1R w KQ -"},{"eco":"E90","name":"King's Indian Defense: Larsen Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1e3","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1BN2/PP3PPP/R2QKB1R b KQ -"},{"eco":"E90","name":"King's Indian Defense: Normal Variation, Rare Defenses","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3","epd":"rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -"},{"eco":"E90","name":"King's Indian Defense: Zinnowitz Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 c1g5","epd":"rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQ -"},{"eco":"E91","name":"King's Indian Defense: Kazakh Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Na6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 b8a6","epd":"r1bq1rk1/ppp1ppbp/n2p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E91","name":"King's Indian Defense: Orthodox Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2","epd":"rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R b KQ -"},{"eco":"E92","name":"King's Indian Defense: Exchange Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. dxe5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4e5","epd":"rnbq1rk1/ppp2pbp/3p1np1/4P3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -"},{"eco":"E92","name":"King's Indian Defense: Orthodox Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5","epd":"rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E92","name":"King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 c1e3","epd":"rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BN2/PP2BPPP/R2QK2R b KQ -"},{"eco":"E92","name":"King's Indian Defense: Petrosian Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5","epd":"rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -"},{"eco":"E92","name":"King's Indian Defense: Petrosian Variation, Stein Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 a5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 a7a5","epd":"rnbq1rk1/1pp2pbp/3p1np1/p2Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E93","name":"King's Indian Defense: Petrosian Variation, Keres Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Bg5 h6 9. Bh4 g5 10. Bg3 Nh5 11. h4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7 c1g5 h7h6 g5h4 g6g5 h4g3 f6h5 h2h4","epd":"r1bq1rk1/pppn1pb1/3p3p/3Pp1pn/2P1P2P/2N2NB1/PP2BPP1/R2QK2R b KQ -"},{"eco":"E93","name":"King's Indian Defense: Petrosian Variation, Normal Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 d4d5 b8d7","epd":"r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1","epd":"rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 b - -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation, Donner Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O c6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 c7c6","epd":"rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation, Glek Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Na6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8a6","epd":"r1bq1rk1/ppp2pbp/n2p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation, Positional Defense","pgn":"1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 g6 6. Be2 Bg7 7. O-O O-O","uci":"d2d4 g8f6 c2c4 d7d6 b1c3 b8d7 e2e4 e7e5 g1f3 g7g6 f1e2 f8g7 e1g1 e8g8","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 Nbd7 7. O-O e5 8. d5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 b8d7 e1g1 e7e5 d4d5","epd":"r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQ1RK1 b - -"},{"eco":"E94","name":"King's Indian Defense: Orthodox Variation, Ukrainian Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O a5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 a7a5","epd":"rnbq1rk1/1pp2pbp/3p1np1/p3p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E95","name":"King's Indian Defense: Orthodox Variation","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1","epd":"r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQR1K1 b - -"},{"eco":"E96","name":"King's Indian Defense: Orthodox Variation, Positional Defense, Main Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nbd7 8. Re1 c6 9. Bf1 a5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8d7 f1e1 c7c6 e2f1 a7a5","epd":"r1bq1rk1/1p1n1pbp/2pp1np1/p3p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 w - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6","epd":"r1bq1rk1/ppp2pbp/2np1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Bayonet Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4","epd":"r1bq1rk1/ppp1npbp/3p1np1/3Pp3/1PP1P3/2N2N2/P3BPPP/R1BQ1RK1 b - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Re1","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4 f6h5 f1e1","epd":"r1bq1rk1/ppp1npbp/3p2p1/3Pp2n/1PP1P3/2N2N2/P3BPPP/R1BQR1K1 b - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Bayonet Attack, Yepishin's Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 Nh5 10. Qc2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 b2b4 f6h5 d1c2","epd":"r1bq1rk1/ppp1npbp/3p2p1/3Pp2n/1PP1P3/2N2N2/P1Q1BPPP/R1B2RK1 b - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Korchnoi Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Bd2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 c1d2","epd":"r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N2N2/PP1BBPPP/R2Q1RK1 b - -"},{"eco":"E97","name":"King's Indian Defense: Orthodox Variation, Modern System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Nd2","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3d2","epd":"r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP1NBPPP/R1BQ1RK1 b - -"},{"eco":"E98","name":"King's Indian Defense: Orthodox Variation, Classical System","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1","epd":"r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP2BPPP/R1BQNRK1 b - -"},{"eco":"E98","name":"King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3 f5 11. f3 f4 12. Bf2 g5 13. Rc1 Ng6 14. c5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 c1e3 f7f5 f2f3 f5f4 e3f2 g6g5 a1c1 e7g6 c4c5","epd":"r1bq1rk1/pppn2bp/3p2n1/2PPp1p1/4Pp2/2N2P2/PP2BBPP/2RQNRK1 b - -"},{"eco":"E98","name":"King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Be3","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 c1e3","epd":"r1bq1rk1/pppnnpbp/3p2p1/3Pp3/2P1P3/2N1B3/PP2BPPP/R2QNRK1 b - -"},{"eco":"E99","name":"King's Indian Defense: Orthodox Variation, Classical System, Benko Attack","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5 11. g4","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5 g2g4","epd":"r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P1P1/2N2P2/PP2B2P/R1BQNRK1 b - -"},{"eco":"E99","name":"King's Indian Defense: Orthodox Variation, Classical System, Traditional Line","pgn":"1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Nd7 10. f3 f5","uci":"d2d4 g8f6 c2c4 g7g6 b1c3 f8g7 e2e4 d7d6 g1f3 e8g8 f1e2 e7e5 e1g1 b8c6 d4d5 c6e7 f3e1 f6d7 f2f3 f7f5","epd":"r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P3/2N2P2/PP2B1PP/R1BQNRK1 w - -"}]}