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kokopu

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A JavaScript/TypeScript library implementing the chess game rules and providing tools to read/write the standard chess file formats.

www.npmjs.com/package/kokopu

yo35/kokopu

44 lines • 103 kB
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LABEL CONSTRUCTOR VARIANT FEN TURN LEGAL WHITE_KING BLACK_KING EFF_CASTLING EFF_EN_PASSANT CHECK CHECKMATE STALEMATE DEAD DEAD_USCF HAS_MOVE MOVES UCI_MOVES NOTATIONS SUCCESSORS Start constructor start regular rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 w true e1 e8 KQkq - false false false false false true a2a3/a2a4/b1a3/b1c3/b2b3/b2b4/c2c3/c2c4/d2d3/d2d4/e2e3/e2e4/f2f3/f2f4/g1f3/g1h3/g2g3/g2g4/h2h3/h2h4 a2a3/a2a4/b1a3/b1c3/b2b3/b2b4/c2c3/c2c4/d2d3/d2d4/e2e3/e2e4/f2f3/f2f4/g1f3/g1h3/g2g3/g2g4/h2h3/h2h4 a3/a4/Na3/Nc3/b3/b4/c3/c4/d3/d4/e3/e4/f3/f4/Nf3/Nh3/g3/g4/h3/h4 rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq - 0 1|rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq - 0 1 Start constructor (antichess) start antichess rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1 w true - - - - false false false false false true a2a3/a2a4/b1a3/b1c3/b2b3/b2b4/c2c3/c2c4/d2d3/d2d4/e2e3/e2e4/f2f3/f2f4/g1f3/g1h3/g2g3/g2g4/h2h3/h2h4 a2a3/a2a4/b1a3/b1c3/b2b3/b2b4/c2c3/c2c4/d2d3/d2d4/e2e3/e2e4/f2f3/f2f4/g1f3/g1h3/g2g3/g2g4/h2h3/h2h4 a3/a4/Na3/Nc3/b3/b4/c3/c4/d3/d4/e3/e4/f3/f4/Nf3/Nh3/g3/g4/h3/h4 rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b - - 0 1|rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b - - 0 1|rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b - - 0 1|rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b - - 0 1 Start constructor (horde) start horde rnbqkbnr/pppppppp/8/1PP2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP w kq - 0 1 w true - e8 kq - false false false false false true a4a5/b5b6/c5c6/d4d5/e4e5/f5f6/g5g6/h4h5 a4a5/b5b6/c5c6/d4d5/e4e5/f5f6/g5g6/h4h5 a5/b6/c6/d5/e5/f6/g6/h5 rnbqkbnr/pppppppp/8/PPP2PP1/1PPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/1P6/2P2PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/2P5/1P3PP1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/8/1PPP1PP1/PPP1PPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/8/1PP1PPP1/PPPP1PPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/5P2/1PP3P1/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/6P1/1PP2P2/PPPPPPPP/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1|rnbqkbnr/pppppppp/8/1PP2PPP/PPPPPPP1/PPPPPPPP/PPPPPPPP/PPPPPPPP b kq - 0 1 Empty constructor empty regular 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Empty constructor (chess960) empty chess960 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Empty constructor (no-king) empty no-king 8/8/8/8/8/8/8/8 w - - 0 1 w true - - - - false false true false false false Empty constructor (white-king-only) empty white-king-only 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Empty constructor (black-king-only) empty black-king-only 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Empty constructor (antichess) empty antichess 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Empty constructor (horde) empty horde 8/8/8/8/8/8/8/8 w - - 0 1 w false - - - - false false false false false false Pinning fen regular rnbqkbnr/pppp1ppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR b KQkq - 0 1 b true e1 e8 KQkq - false false false false false true a7a5/a7a6/b7b6/b8a6/b8c6/c7c5/c7c6/d8e7/d8f6/d8g5/d8h4/e8e7/f7f5/f7f6/f8a3/f8b4/f8c5/f8d6/f8e7/g7g5/g7g6/g8e7/g8f6/g8h6/h7h5/h7h6 a7a5/a7a6/b7b6/b8a6/b8c6/c7c5/c7c6/d8e7/d8f6/d8g5/d8h4/e8e7/f7f5/f7f6/f8a3/f8b4/f8c5/f8d6/f8e7/g7g5/g7g6/g8e7/g8f6/g8h6/h7h5/h7h6 a5/a6/b6/Na6/Nc6/c5/c6/Qe7/Qf6/Qg5/Qh4/Ke7/f5/f6/Ba3/Bb4/Bc5/Bd6/Be7/g5/g6/Ne7/Nf6/Nh6/h5/h6 rnbqkbnr/1ppp1ppp/8/pB2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/1ppp1ppp/p7/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/p1pp1ppp/1p6/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|r1bqkbnr/pppp1ppp/n7/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pp1p1ppp/8/1Bp1p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pp1p1ppp/2p5/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnb1kbnr/ppppqppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnb1kbnr/pppp1ppp/5q2/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnb1kbnr/pppp1ppp/8/1B2p1q1/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnb1kbnr/pppp1ppp/8/1B2p3/4P2q/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbq1bnr/ppppkppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQ - 0 1|rnbqkbnr/pppp2pp/8/1B2pp2/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pppp2pp/5p2/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqk1nr/pppp1ppp/8/1B2p3/4P3/b7/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqk1nr/pppp1ppp/8/1B2p3/1b2P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqk1nr/pppp1ppp/8/1Bb1p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqk1nr/pppp1ppp/3b4/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqk1nr/ppppbppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pppp1p1p/8/1B2p1p1/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pppp1p1p/6p1/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkb1r/ppppnppp/8/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkb1r/pppp1ppp/5n2/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkb1r/pppp1ppp/7n/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pppp1pp1/8/1B2p2p/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1|rnbqkbnr/pppp1pp1/7p/1B2p3/4P3/8/PPPP1PPP/RNBQK1NR w KQkq - 0 1 No pinning fen regular r3r1k1/p4pp1/2p3n1/1p1qPN1Q/4R2P/2P5/PP4P1/R6K w - - 0 1 w true h1 g8 - - false false false false false true a1b1/a1c1/a1d1/a1e1/a1f1/a1g1/a2a3/a2a4/b2b3/b2b4/c3c4/e4a4/e4b4/e4c4/e4d4/e4e1/e4e2/e4e3/e4f4/e4g4/e5e6/f5d4/f5d6/f5e3/f5e7/f5g3/f5g7/f5h6/g2g3/g2g4/h1g1/h1h2/h5d1/h5e2/h5f3/h5g4/h5g5/h5g6/h5h6/h5h7/h5h8 a1b1/a1c1/a1d1/a1e1/a1f1/a1g1/a2a3/a2a4/b2b3/b2b4/c3c4/e4a4/e4b4/e4c4/e4d4/e4e1/e4e2/e4e3/e4f4/e4g4/e5e6/f5d4/f5d6/f5e3/f5e7/f5g3/f5g7/f5h6/g2g3/g2g4/h1g1/h1h2/h5d1/h5e2/h5f3/h5g4/h5g5/h5g6/h5h6/h5h7/h5h8 Rb1/Rc1/Rd1/Rae1/Rf1/Rg1/a3/a4/b3/b4/c4/Ra4/Rb4/Rc4/Rd4/Ree1/Re2/Re3/Rf4/Rg4/e6/Nd4/Nd6/Ne3/Ne7+/Ng3/Nxg7/Nh6+/g3/g4/Kg1/Kh2/Qd1/Qe2/Qf3/Qg4/Qg5/Qxg6/Qh6/Qh7+/Qh8+ r3r1k1/p4pp1/2p3n1/1p1qPN1Q/4R2P/2P5/PP4P1/1R5K b - 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- 0 1|4qr1k/r7/p2p3b/1p1Nn3/4QPbP/2P1N1R1/PP6/2K3R1 w - - 0 1|4qr1k/r7/p2p2bb/1p1Nn3/4QP1P/2P1N1R1/PP6/2K3R1 w - - 0 1|4qr1k/r7/p2p4/1p1Nn2b/4Qb1P/2P1N1R1/PP6/2K3R1 w - - 0 1|4qr1k/r7/p2p4/1p1Nn1bb/4QP1P/2P1N1R1/PP6/2K3R1 w - - 0 1|4qr1k/r5b1/p2p4/1p1Nn2b/4QP1P/2P1N1R1/PP6/2K3R1 w - - 0 1 White castling while in check fen regular k7/8/8/b7/8/p6p/P6P/R3K2R w KQ - 0 1 w true e1 a8 KQ - true false false false false true e1d1/e1e2/e1f1/e1f2 e1d1/e1e2/e1f1/e1f2 Kd1/Ke2/Kf1/Kf2 k7/8/8/b7/8/p6p/P6P/R2K3R b - - 0 1|k7/8/8/b7/8/p6p/P3K2P/R6R b - - 0 1|k7/8/8/b7/8/p6p/P6P/R4K1R b - - 0 1|k7/8/8/b7/8/p6p/P4K1P/R6R b - - 0 1 White castling while b&f controlled fen regular k7/8/8/8/8/p2b3p/P6P/R3K2R w KQ - 0 1 w true e1 a8 KQ - false false false false false true a1b1/a1c1/a1d1/e1c1O/e1d1/e1d2/e1f2/h1f1/h1g1 a1b1/a1c1/a1d1/e1c1/e1d1/e1d2/e1f2/h1f1/h1g1 Rb1/Rc1/Rd1/O-O-O/Kd1/Kd2/Kf2/Rf1/Rg1 k7/8/8/8/8/p2b3p/P6P/1R2K2R b K - 0 1|k7/8/8/8/8/p2b3p/P6P/2R1K2R b K - 0 1|k7/8/8/8/8/p2b3p/P6P/3RK2R b K - 0 1|k7/8/8/8/8/p2b3p/P6P/2KR3R b - 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0 1|k7/8/7b/8/8/p6p/P6P/2R1K2R b K - 0 1|k7/8/7b/8/8/p6p/P6P/3RK2R b K - 0 1|k7/8/7b/8/8/p6p/P6P/R2K3R b - - 0 1|k7/8/7b/8/8/p6p/P3K2P/R6R b - - 0 1|k7/8/7b/8/8/p6p/P6P/R4K1R b - - 0 1|k7/8/7b/8/8/p6p/P4K1P/R6R b - - 0 1|k7/8/7b/8/8/p6p/P6P/R4RK1 b - - 0 1|k7/8/7b/8/8/p6p/P6P/R3KR2 b Q - 0 1|k7/8/7b/8/8/p6p/P6P/R3K1R1 b Q - 0 1 White castling while g controlled fen regular k7/b7/8/8/8/p6p/P6P/R3K2R w KQ - 0 1 w true e1 a8 KQ - false false false false false true a1b1/a1c1/a1d1/e1c1O/e1d1/e1d2/e1e2/e1f1/h1f1/h1g1 a1b1/a1c1/a1d1/e1c1/e1d1/e1d2/e1e2/e1f1/h1f1/h1g1 Rb1/Rc1/Rd1/O-O-O/Kd1/Kd2/Ke2/Kf1/Rf1/Rg1 k7/b7/8/8/8/p6p/P6P/1R2K2R b K - 0 1|k7/b7/8/8/8/p6p/P6P/2R1K2R b K - 0 1|k7/b7/8/8/8/p6p/P6P/3RK2R b K - 0 1|k7/b7/8/8/8/p6p/P6P/2KR3R b - - 0 1|k7/b7/8/8/8/p6p/P6P/R2K3R b - - 0 1|k7/b7/8/8/8/p6p/P2K3P/R6R b - - 0 1|k7/b7/8/8/8/p6p/P3K2P/R6R b - - 0 1|k7/b7/8/8/8/p6p/P6P/R4K1R b - - 0 1|k7/b7/8/8/8/p6p/P6P/R3KR2 b Q - 0 1|k7/b7/8/8/8/p6p/P6P/R3K1R1 b Q - 0 1 Wrong white castling flags (king not on e) fen regular k7/8/8/8/8/p6p/P6P/R2K3R w KQ - 0 1 w true d1 a8 - - false false false false false true a1b1/a1c1/d1c1/d1c2/d1d2/d1e1/d1e2/h1e1/h1f1/h1g1 a1b1/a1c1/d1c1/d1c2/d1d2/d1e1/d1e2/h1e1/h1f1/h1g1 Rb1/Rc1/Kc1/Kc2/Kd2/Ke1/Ke2/Re1/Rf1/Rg1 k7/8/8/8/8/p6p/P6P/1R1K3R b - - 0 1|k7/8/8/8/8/p6p/P6P/2RK3R b - - 0 1|k7/8/8/8/8/p6p/P6P/R1K4R b - - 0 1|k7/8/8/8/8/p6p/P1K4P/R6R b - - 0 1|k7/8/8/8/8/p6p/P2K3P/R6R b - - 0 1|k7/8/8/8/8/p6p/P6P/R3K2R b - - 0 1|k7/8/8/8/8/p6p/P3K2P/R6R b - - 0 1|k7/8/8/8/8/p6p/P6P/R2KR3 b - - 0 1|k7/8/8/8/8/p6p/P6P/R2K1R2 b - - 0 1|k7/8/8/8/8/p6p/P6P/R2K2R1 b - - 0 1 Black castling while in check fen regular r3k2r/p6p/P6P/8/B7/8/8/K7 b kq - 0 1 b true a1 e8 kq - true false false false false true e8d8/e8e7/e8f7/e8f8 e8d8/e8e7/e8f7/e8f8 Kd8/Ke7/Kf7/Kf8 r2k3r/p6p/P6P/8/B7/8/8/K7 w - - 0 1|r6r/p3k2p/P6P/8/B7/8/8/K7 w - - 0 1|r6r/p4k1p/P6P/8/B7/8/8/K7 w - - 0 1|r4k1r/p6p/P6P/8/B7/8/8/K7 w - - 0 1 Black castling while b&f controlled fen regular r3k2r/p6p/P2B3P/8/8/8/8/K7 b kq - 0 1 b true a1 e8 kq - false false false false false true a8b8/a8c8/a8d8/e8c8O/e8d7/e8d8/e8f7/h8f8/h8g8 a8b8/a8c8/a8d8/e8c8/e8d7/e8d8/e8f7/h8f8/h8g8 Rb8/Rc8/Rd8/O-O-O/Kd7/Kd8/Kf7/Rf8/Rg8 1r2k2r/p6p/P2B3P/8/8/8/8/K7 w k - 0 1|2r1k2r/p6p/P2B3P/8/8/8/8/K7 w k - 0 1|3rk2r/p6p/P2B3P/8/8/8/8/K7 w k - 0 1|2kr3r/p6p/P2B3P/8/8/8/8/K7 w - - 0 1|r6r/p2k3p/P2B3P/8/8/8/8/K7 w - - 0 1|r2k3r/p6p/P2B3P/8/8/8/8/K7 w - - 0 1|r6r/p4k1p/P2B3P/8/8/8/8/K7 w - - 0 1|r3kr2/p6p/P2B3P/8/8/8/8/K7 w q - 0 1|r3k1r1/p6p/P2B3P/8/8/8/8/K7 w q - 0 1 Black castling while d&h controlled fen regular r3k2r/p6p/P4B1P/8/8/8/8/K7 b kq - 0 1 b true a1 e8 kq - false false false false false true a8b8/a8c8/a8d8/e8d7/e8f7/e8f8/e8g8O/h8f8/h8g8 a8b8/a8c8/a8d8/e8d7/e8f7/e8f8/e8g8/h8f8/h8g8 Rb8/Rc8/Rd8/Kd7/Kf7/Kf8/O-O/Rf8/Rg8 1r2k2r/p6p/P4B1P/8/8/8/8/K7 w k - 0 1|2r1k2r/p6p/P4B1P/8/8/8/8/K7 w k - 0 1|3rk2r/p6p/P4B1P/8/8/8/8/K7 w k - 0 1|r6r/p2k3p/P4B1P/8/8/8/8/K7 w - - 0 1|r6r/p4k1p/P4B1P/8/8/8/8/K7 w - - 0 1|r4k1r/p6p/P4B1P/8/8/8/8/K7 w - - 0 1|r4rk1/p6p/P4B1P/8/8/8/8/K7 w - - 0 1|r3kr2/p6p/P4B1P/8/8/8/8/K7 w q - 0 1|r3k1r1/p6p/P4B1P/8/8/8/8/K7 w q - 0 1 Black castling while c controlled fen regular r3k2r/p6p/P6P/8/8/7B/8/K7 b kq - 0 1 b true a1 e8 kq - false false false false false true a8b8/a8c8/a8d8/e8d8/e8e7/e8f7/e8f8/e8g8O/h8f8/h8g8 a8b8/a8c8/a8d8/e8d8/e8e7/e8f7/e8f8/e8g8/h8f8/h8g8 Rb8/Rc8/Rd8/Kd8/Ke7/Kf7/Kf8/O-O/Rf8/Rg8 1r2k2r/p6p/P6P/8/8/7B/8/K7 w k - 0 1|2r1k2r/p6p/P6P/8/8/7B/8/K7 w k - 0 1|3rk2r/p6p/P6P/8/8/7B/8/K7 w k - 0 1|r2k3r/p6p/P6P/8/8/7B/8/K7 w - - 0 1|r6r/p3k2p/P6P/8/8/7B/8/K7 w - - 0 1|r6r/p4k1p/P6P/8/8/7B/8/K7 w - - 0 1|r4k1r/p6p/P6P/8/8/7B/8/K7 w - - 0 1|r4rk1/p6p/P6P/8/8/7B/8/K7 w - - 0 1|r3kr2/p6p/P6P/8/8/7B/8/K7 w q - 0 1|r3k1r1/p6p/P6P/8/8/7B/8/K7 w q - 0 1 Black castling while g controlled fen regular r3k2r/p6p/P6P/8/8/8/B7/K7 b kq - 0 1 b true a1 e8 kq - false false false false false true a8b8/a8c8/a8d8/e8c8O/e8d7/e8d8/e8e7/e8f8/h8f8/h8g8 a8b8/a8c8/a8d8/e8c8/e8d7/e8d8/e8e7/e8f8/h8f8/h8g8 Rb8/Rc8/Rd8/O-O-O/Kd7/Kd8/Ke7/Kf8/Rf8/Rg8 1r2k2r/p6p/P6P/8/8/8/B7/K7 w k - 0 1|2r1k2r/p6p/P6P/8/8/8/B7/K7 w k - 0 1|3rk2r/p6p/P6P/8/8/8/B7/K7 w k - 0 1|2kr3r/p6p/P6P/8/8/8/B7/K7 w - - 0 1|r6r/p2k3p/P6P/8/8/8/B7/K7 w - - 0 1|r2k3r/p6p/P6P/8/8/8/B7/K7 w - - 0 1|r6r/p3k2p/P6P/8/8/8/B7/K7 w - - 0 1|r4k1r/p6p/P6P/8/8/8/B7/K7 w - - 0 1|r3kr2/p6p/P6P/8/8/8/B7/K7 w q - 0 1|r3k1r1/p6p/P6P/8/8/8/B7/K7 w q - 0 1 Wrong black castling flags (king not on e) fen regular r2k3r/p6p/P6P/8/8/8/8/K7 b kq - 0 1 b true a1 d8 - - false false false false false true a8b8/a8c8/d8c7/d8c8/d8d7/d8e7/d8e8/h8e8/h8f8/h8g8 a8b8/a8c8/d8c7/d8c8/d8d7/d8e7/d8e8/h8e8/h8f8/h8g8 Rb8/Rc8/Kc7/Kc8/Kd7/Ke7/Ke8/Re8/Rf8/Rg8 1r1k3r/p6p/P6P/8/8/8/8/K7 w - - 0 1|2rk3r/p6p/P6P/8/8/8/8/K7 w - - 0 1|r6r/p1k4p/P6P/8/8/8/8/K7 w - - 0 1|r1k4r/p6p/P6P/8/8/8/8/K7 w - - 0 1|r6r/p2k3p/P6P/8/8/8/8/K7 w - - 0 1|r6r/p3k2p/P6P/8/8/8/8/K7 w - - 0 1|r3k2r/p6p/P6P/8/8/8/8/K7 w - - 0 1|r2kr3/p6p/P6P/8/8/8/8/K7 w - - 0 1|r2k1r2/p6p/P6P/8/8/8/8/K7 w - - 0 1|r2k2r1/p6p/P6P/8/8/8/8/K7 w - - 0 1 Stalemated fen regular 4k3/4P3/4K3/8/8/8/8/8 b - - 0 1 b true e6 e8 - - false false true false false false Checkmated fen regular 8/8/8/8/8/6k1/8/r5K1 w - - 0 1 w true g1 g3 - - true true false false false false In check with right turn fen regular 8/8/8/Kr5k/8/8/8/8 w - - 0 1 w true a5 h5 - - true false false false false true a5a4/a5a6/a5b5 a5a4/a5a6/a5b5 Ka4/Ka6/Kxb5 8/8/8/1r5k/K7/8/8/8 b - - 0 1|8/8/K7/1r5k/8/8/8/8 b - - 0 1|8/8/8/1K5k/8/8/8/8 b - - 0 1 In check with wrong turn fen regular 8/8/8/Kr5k/8/8/8/8 b - - 0 1 b false a5 h5 - - false false false false false false Promotion + disambiguation 1 fen regular 2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R w K c6 0 1 w true e1 e8 K c false false false false false true a1b1/a1c1/a1d1/a2a3/a2a4/a6b7/a7b5/a7c6/a7c8/b6a4/b6a8/b6c4/b6c8/b6d7/d5c6/e1d1/e1d2/e1f1/e1g1O/e2b5/e2c4/e2d1/e2d3/e2f1/f3d3/f3e3/f3f4/f3f5/f3f6/f3f7/f3g3/f3h3/g4b4/g4c4/g4c8/g4d4/g4d7/g4e4/g4e6/g4f4/g4f5/g4g1/g4g2/g4g3/g4g5/g4g6/g4h3/g4h4/g7f8B/g7f8N/g7f8Q/g7f8R/g7g8B/g7g8N/g7g8Q/g7g8R/h1f1/h1g1/h1h2/h1h3/h1h4/h5e5/h5f5/h5g5/h5h2/h5h3/h5h4/h6c1/h6d2/h6e3/h6f4/h6g5 a1b1/a1c1/a1d1/a2a3/a2a4/a6b7/a7b5/a7c6/a7c8/b6a4/b6a8/b6c4/b6c8/b6d7/d5c6/e1d1/e1d2/e1f1/e1g1/e2b5/e2c4/e2d1/e2d3/e2f1/f3d3/f3e3/f3f4/f3f5/f3f6/f3f7/f3g3/f3h3/g4b4/g4c4/g4c8/g4d4/g4d7/g4e4/g4e6/g4f4/g4f5/g4g1/g4g2/g4g3/g4g5/g4g6/g4h3/g4h4/g7f8b/g7f8n/g7f8q/g7f8r/g7g8b/g7g8n/g7g8q/g7g8r/h1f1/h1g1/h1h2/h1h3/h1h4/h5e5/h5f5/h5g5/h5h2/h5h3/h5h4/h6c1/h6d2/h6e3/h6f4/h6g5 Rb1/Rc1/Rd1/a3/a4/axb7/Nb5/Nc6/Naxc8/Na4/Na8/Nc4/Nbxc8/Nd7/dxc6/Kd1/Kd2/Kf1/O-O/Bb5+/Bc4/Bd1/Bd3/Bf1/Rd3/Re3/Rf4/Rff5/Rf6/Rxf7/Rg3/Rfh3/Qxb4/Qc4/Qxc8+/Qd4/Qd7#/Qe4/Qe6/Qf4/Qf5/Qg1/Qg2/Qg3/Qg5/Qg6/Qh3/Qh4/gxf8=B/gxf8=N/gxf8=Q#/gxf8=R#/g8=B/g8=N/g8=Q/g8=R/Rf1/Rg1/R1h2/R1h3/R1h4/Re5/Rhf5/Rg5/R5h2/R5h3/R5h4/Bc1/Bd2/Be3/Bf4/Bg5 2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/1R2K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/2R1K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/3RK2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/P1R2R2/4BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/Pb4Q1/2R2R2/4BP2/R3K2R b K - 0 1|2r1kq2/NP2ppPp/1N1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/1p2ppPp/PN1n3B/1NpP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/1p2ppPp/PNNn3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2N1kq2/1p2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/P2n3B/2pP3R/Nb4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|N1r1kq2/Np2ppPp/P2n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/P2n3B/2pP3R/1bN3Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2N1kq2/Np2ppPp/P2n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np1NppPp/P2n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PNPn3B/7R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R2K3R b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P2KBP2/R6R b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R4K1R b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R4RK1 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/1BpP3R/1b4Q1/2R2R2/P4P2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1bB3Q1/2R2R2/P4P2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P4P2/R2BK2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2RB1R2/P4P2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P4P2/R3KB1R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2RR4/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R1R3/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b3RQ1/2R5/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP1R1R/1b4Q1/2R5/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n1R1B/2pP3R/1b4Q1/2R5/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2pRPp/PN1n3B/2pP3R/1b4Q1/2R5/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R3R1/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R4R/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1Q6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1bQ5/2R2R2/P3BP2/R3K2R b K - 0 1|2Q1kq2/Np2ppPp/PN1n3B/2pP3R/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b1Q4/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np1QppPp/PN1n3B/2pP3R/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b2Q3/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1nQ2B/2pP3R/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b3Q2/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP1Q1R/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b6/2R2R2/P3BP2/R3K1QR b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b6/2R2R2/P3BPQ1/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b6/2R2RQ1/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP2QR/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n2QB/2pP3R/1b6/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b6/2R2R1Q/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b5Q/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kB2/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kN2/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kQ2/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kR2/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kqB1/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kqN1/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kqQ1/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kqR1/Np2pp1p/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3KR2 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP2/R3K1R1 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R2/P3BP1R/R3K3 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4Q1/2R2R1R/P3BP2/R3K3 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP3R/1b4QR/2R2R2/P3BP2/R3K3 b - - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pPR3/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP1R2/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP2R1/1b4Q1/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP4/1b4Q1/2R2R2/P3BP1R/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP4/1b4Q1/2R2R1R/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n3B/2pP4/1b4QR/2R2R2/P3BP2/R3K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n4/2pP3R/1b4Q1/2R2R2/P3BP2/R1B1K2R b K - 0 1|2r1kq2/Np2ppPp/PN1n4/2pP3R/1b4Q1/2R2R2/P2BBP2/R3K2R b K - 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