fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
5rk1/p1p3n1/1b4r1/5QN1/3R3P/2P3B1/PP2p1P1/4K2R b K - 0 30 | Nxf5 | Is the move from f8 to d8 legal? | Yes | legality |
r1b3k1/pp4q1/n1pP1BP1/7Q/2P1p3/1P6/P5PP/4R2K b - - 0 28 | Bg4 | Is the move from e4 to f2 legal? | No | legality |
r1bq1rk1/1p1n1ppp/2p1pn2/3p4/1pPP4/5NP1/PP1NPPBP/R1Q2RK1 b - - 1 10 | b6 | What piece is on a7? | Empty | occupancy |
rnbqk2r/pp2nppp/4p3/3pP3/2PP4/P4N2/5PPP/R1BQKB1R b KQkq - 0 9 | Nbc6 | Are there any open files in this position? | No | files |
r1bqk2r/pp1n1ppp/2pbpn2/3P4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b kq - 0 7 | cxd5 | What piece is on f5? | Empty | occupancy |
4k2r/4bpp1/pn2b2p/1p2p3/6PP/P1P2P2/2PB4/1K1R1B1R w k - 2 21 | Re1 | Does White have any isolated pawns? | Yes: a3, c2, c3 | structure |
2r1kb1r/5p2/pq2p1p1/1p1bP1Bp/1P5P/P5Q1/5PP1/R3KB1R w KQk - 2 18 | Be3 | Is the move from b4 to a5 legal? | No | legality |
2k5/7R/2K5/2P5/8/8/8/2r5 b - - 3 2 | Kb8 | What piece is on c7? | Empty | occupancy |
r1bqkb1r/ppppn2p/2n3p1/5pN1/3p4/5Q2/PPP2PPP/RNB1R1K1 w kq - 0 11 | Qd5 | Is the move from a1 to c7 legal? | No | legality |
r1bq1rk1/1p1nbppp/p3p3/4P3/3NpPP1/2P1B3/PPQ1B2P/R3K2R b KQ - 2 13 | Nc5 | Is the White king in check? | No | check |
2r2rk1/6pp/1Q1p4/3Pb3/1RP2p1q/P3pP2/6PP/3R1B1K w - - 0 31 | Bd3 | Identify any Black knight outposts on the board. | None | outposts |
2r3k1/q3npp1/1p2p2p/1Qn5/8/P1RNPBP1/5P1P/6K1 b - - 5 29 | Nd7 | What piece is on g3? | White Pawn | occupancy |
8/6k1/8/8/7p/7P/5p2/3Kq3 w - - 2 60 | e5e1 | Is the White king in check? | Yes | check |
r1r2n2/1bq2k1p/p2Rp1p1/2p1Pp2/2B1pP2/BP2Q3/P5PP/2R3K1 w - - 4 23 | Rcd1 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
2r3k1/5rpp/4b3/3p1n2/BP2p3/P7/1B4PP/4Q1K1 w - - 5 30 | h3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
3qnrk1/1b2np1p/pp1b2pB/3pN2N/3P2Q1/1PrB4/P4PPP/R3R1K1 b - - 3 19 | Bxe5 | Does Black have any passed pawns? | No | structure |
r1bq1rk1/pp3p2/2p2ppQ/4n1N1/3p4/3B4/PPP3PP/RN4K1 w - - 0 19 | Qh7# | What piece is on b3? | Empty | occupancy |
5rk1/p4ppp/1p6/4p3/2Pp4/5QP1/PP3PbP/R2R2K1 b - - 0 20 | Bxf3 | What piece is on d1? | White Rook | occupancy |
r1b2rk1/2q1bppp/p1np1n2/1p2p3/3PP3/5N1P/PPBN1PP1/R1BQR1K1 w - - 1 14 | Nb3 | Does Black have any passed pawns? | No | structure |
2r3k1/5ppp/rp2p3/p2pP3/3N4/N1P5/q4PPP/2QR2K1 w - - 4 20 | Rd2 | Does Black have any passed pawns? | Yes: a5 | structure |
1r4k1/8/6P1/6KP/8/8/4R3/8 b - - 4 56 | Kf8 | Does Black have any passed pawns? | No | structure |
r1bq1rk1/1p3pbp/p2pnnp1/4p3/P1B1P3/1NN1BP2/1PP1Q1PP/R4RK1 b - - 3 13 | Nh5 | What piece is on a8? | Black Rook | occupancy |
r3rk2/1bpqb2B/1p2p1Qp/3P4/1P5P/6P1/2R5/6K1 w - - 2 32 | Qg8# | Identify any White knight outposts on the board. | e6, h4 | outposts |
r1br2k1/1q3ppp/pnp1pb2/8/N7/6P1/PPPB1PBP/1R1QR1K1 w - - 11 18 | Nc5 | Are there any open files in this position? | Yes: d | files |
k7/1p6/1R4p1/PN2Pn1p/3p3P/5rPK/8/8 w - - 2 65 | Rf6 | Are there any open files in this position? | Yes: c, f | files |
1r3rk1/1p1b1pnp/p2p1PpQ/2pP2N1/2P1P1P1/7P/P6K/5q2 b - - 1 26 | Qf2+ | Does Black have any isolated pawns? | No | structure |
2r5/4kp1p/8/4P1p1/6P1/2p1KP1P/8/2R5 w - - 2 36 | f4 | Is the b-file open, semi-open, or closed? | open | files |
r1b1k2r/pp3pb1/6p1/2pNn3/4P3/4N1P1/PP2BP2/R2R2K1 b kq - 0 21 | Kf8 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
3rr1k1/1b3pp1/4q3/pQn1P2p/2pR3P/2B1P1P1/5PB1/1R4K1 b - - 0 39 | Rb8 | What piece is on d4? | White Rook | occupancy |
8/8/5P1P/3Q4/pk1P4/6K1/5r1r/8 w - - 1 61 | f7 | Does Black have any isolated pawns? | Yes: a4 | structure |
1R6/pP1k1p2/P2np1p1/3p3p/2r2P2/2PK2PP/8/8 w - - 1 4 | Rf8 | Does Black have any isolated pawns? | Yes: a7 | structure |
2rq1rk1/1p3pp1/8/pN2nBPb/Pb1P3P/3Q2B1/1P6/R5K1 w - - 0 28 | Bxe5 | What piece is on b5? | White Knight | occupancy |
r1bq1rk1/ppp2pp1/5n1p/3p4/4P3/1PN1Q3/1PP2PPP/2KR1B1R b - - 1 13 | Ng4 | Identify any White knight outposts on the board. | None | outposts |
r3rnk1/p3qpb1/2pp3p/5bp1/2PP1Pn1/BQN1pNP1/P3P1BP/R2R2K1 w - - 0 19 | Ne5 | Is the move from g1 to f1 legal? | Yes | legality |
rnb2rk1/ppp1qpbp/3p1np1/4p3/2PPP3/2N1BN2/PPQ1BPPP/R3K2R b KQ - 3 8 | exd4 | Is the move from g8 to d4 legal? | No | legality |
r1b2r2/4ppkp/pp1n1qp1/2pPp3/P3P3/2Q5/1PP1BPPP/RN2R1K1 w - - 4 18 | Nd2 | Is the White king in check? | No | check |
4R3/5r1p/5k2/8/7Q/K7/P7/5q2 b - - 3 50 | g3h4 | Is the Black king in check? | Yes | check |
r2qk1nr/1pp3p1/p1nb4/3p1Pp1/B2P4/2P2Q2/PP4PP/RNB1K2R b KQkq - 2 12 | g4 | Is the White king in check? | No | check |
rnbqkb1r/5ppp/p2ppn2/8/PN1NP3/3B4/1PP2PPP/R1BQK2R b KQkq - 0 9 | d5 | Are there any open files in this position? | No | files |
5rk1/1R5R/3p1b2/q7/4nP2/2P2QP1/1P6/1K6 b - - 8 43 | Nd2+ | Does White have any isolated pawns? | No | structure |
3Q1n1q/2R2rk1/pp2b3/4P1p1/1P2Np2/P2P1P2/6K1/3R4 b - - 0 37 | Qh3+ | What piece is on f3? | White Pawn | occupancy |
r1bqr1k1/3nbppp/p2p4/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR2K w - - 3 13 | d5 | What piece is on a1? | White Rook | occupancy |
5N2/p7/3k4/6P1/1p6/8/r4PK1/8 b - - 0 47 | g4g5 | What is the material balance in this position? | Black is up 2 pawns of material | material |
k7/1p4R1/B1qrp2r/4n3/PQ2Pp2/2N1b3/1PP5/1K6 b - - 0 35 | Qxa6 | Is the White king in check? | No | check |
1r6/R4Qpk/4p3/6q1/8/4P3/1P1r1P1P/5R1K b - - 2 24 | Qd5+ | Does Black have any isolated pawns? | Yes: e6, g7 | structure |
r1b2nk1/1p3pbp/1q4p1/p2pr3/3N4/1P3P2/PB1QN1PP/1R3R1K b - - 1 20 | Re8 | Are there any open files in this position? | Yes: c, e | files |
r4rk1/pp2ppbp/5np1/3b4/2PB4/1B5P/PP3PP1/R3R1K1 w - - 0 19 | cxd5 | Does Black have any passed pawns? | No | structure |
r1bqkb1r/ppp2ppp/2np1n2/4p3/3PP3/2P2N1P/PP3PP1/RNBQKB1R b KQkq - 0 5 | Be7 | Are there any open files in this position? | No | files |
8/8/5R2/2p1p1P1/p1k1P2P/P4p2/6r1/2K5 b - - 3 68 | f2 | Is the move from c5 to d6 legal? | No | legality |
4Qbk1/pb3R1p/3P1pp1/1p6/8/P4N2/5PPP/2q3K1 w - - 0 30 | Ne1 | Does White have any isolated pawns? | Yes: a3, d6 | structure |
r1b1k2r/1pq2p2/p3p2p/3Nb3/3N3p/8/PPP3PP/R2QR1K1 b kq - 1 16 | Qd6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
3r4/ppp4p/1Np1k3/8/4p3/BPP1Kp2/P4prP/R4R2 b - - 1 26 | Kf5 | Does White have any passed pawns? | No | structure |
r1bqkb1r/pp2pppp/2n2n2/3p4/2PP4/2N2N2/PP3PPP/R1BQKB1R b KQkq - 4 6 | g6 | Does White have any passed pawns? | No | structure |
r3rb1k/p4pp1/1np5/q3pbP1/1pBPP3/4B1P1/PPPQ4/2KR4 w - - 0 20 | Qh2+ | What piece is on e5? | Black Pawn | occupancy |
4b2q/5Pk1/6P1/2R3B1/8/3p4/8/n3K3 w - - 1 2 | Bh6+ | Is the move from c5 to c6 legal? | Yes | legality |
1r3rk1/p4pp1/3p1n1p/8/3Pq3/8/3RK1PP/3Q3R w - - 3 31 | b1e4 | Is the White king in check? | Yes | check |
r1b2rk1/pp1ppp1p/5Qp1/q7/3nP3/1BN1B3/PPP2PPP/R4RK1 b - - 0 12 | Ne2+ | Does Black have any passed pawns? | No | structure |
rnb2Q2/pp1p3p/1k2p3/1N6/4P3/8/P1PN1PrP/2qBK2R w K - 5 20 | a4 | Is the move from b5 to d6 legal? | Yes | legality |
4k2r/7p/p4p2/3Pp3/4Q3/4R3/q4PPP/2r1N1K1 w k - 0 25 | Qf5 | What piece is on d4? | Empty | occupancy |
8/1p3pkp/pq2b1p1/4P3/2p5/Q1P2B2/P2r1PPP/5RK1 b - - 5 23 | Bf5 | Are there any open files in this position? | Yes: d | files |
r3k2r/pppq2bp/2npbnp1/1P2pp2/2P5/2NP1NP1/P3PPBP/1RBQ1RK1 b kq - 0 10 | Ne7 | Are there any open files in this position? | No | files |
r2qk2r/p4p2/n1pb1n2/1p1p2pp/3Pp1b1/P1N1P1P1/2PBNPBP/R2Q1RK1 w kq - 0 13 | h7h5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
3r2k1/p4p2/4bP1p/qp1p4/2p4p/2P2B2/PP1R2PP/1K1R4 b - - 3 23 | f1d1 | What is the material balance in this position? | Black is up 5 pawns of material | material |
r1b1qrk1/pppp1p2/5B1p/8/2BQPp2/8/PPP3PP/RN4K1 w - - 1 13 | Bh8 | Identify any Black knight outposts on the board. | e3 | outposts |
r5k1/pb3rp1/1p5p/8/2BP4/P1Nn4/1P4PP/3R2K1 w - - 0 21 | Rxd3 | Identify any White knight outposts on the board. | e5 | outposts |
r3k2r/1p3p2/p2p1b1B/3nq2P/8/2P2R2/PP1QB3/R2K4 w kq - 0 28 | Rd3 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
1n1r1rk1/pbq2p1p/1p1b1p2/2p1Np1Q/3P1P2/P1P5/1P4PP/R3R1K1 w - - 0 20 | Re3 | What is the material balance in this position? | Black is up 6 pawns of material | material |
r1q1k2r/1p1nbppp/p1p1pn2/2Pp1b2/QP1P1B2/2N1PN1P/P4PP1/R3KB1R w KQkq - 1 12 | Qb3 | What piece is on h7? | Black Pawn | occupancy |
1k1r2r1/pp1b1pp1/2q1pn1p/3p4/8/B1PBQ3/PP3PPP/2R2RK1 w - - 0 17 | c4 | Is the Black king in check? | No | check |
r1n1k2r/p1q1n1bp/2b3p1/1p2p3/1p2P3/1Q2BN1P/P3BPP1/2R2RK1 w kq - 0 19 | Ng5 | Does White have any passed pawns? | No | structure |
1Q3r2/1b1qbk1p/p2p2p1/8/8/1P4P1/P4P1P/2R1R1K1 w - - 6 29 | Rc7 | What piece is on b3? | White Pawn | occupancy |
r2qkb1r/1p2pppp/p1np1nb1/2p5/4P1P1/2P2N1P/PP1P1P2/RNBQRBK1 w kq - 1 10 | d4 | Is the move from a2 to b8 legal? | No | legality |
8/K7/P2k4/8/8/8/8/8 b - - 0 5 | Kc7 | What is the material balance in this position? | White is up 1 pawn of material | material |
3q1rk1/3n1pp1/1pp1bb1p/r2p4/P2P4/2N1PN2/2Q1BPPP/1R1R2K1 b - - 6 17 | Qa8 | What is the material balance in this position? | Equal | material |
r1b1kb1r/2qn1ppp/3ppn2/1N4B1/4P3/2N3Q1/PPP2PPP/2KR3R b kq - 0 11 | Qb8 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1q2rk1/4ppb1/1n1p2p1/3P1PPp/ppp1P2P/4Q3/PPP1N3/1NKR3R b - - 1 21 | b3 | What is the material balance in this position? | Equal | material |
r2qr1k1/2p2p1p/bpnn2pB/p1b1p3/2N1P2N/1PP3PP/P3QPB1/R3R1K1 w - - 2 17 | Nf5 | Identify any Black knight outposts on the board. | None | outposts |
2k4r/1p6/p7/3R3p/4P3/1PP2P2/2K3p1/8 w - - 0 32 | Rg5 | Identify any White knight outposts on the board. | d4, d5, e4, f5 | outposts |
r1bqkb1r/pp2pppp/2p2n2/3n4/3P4/3B1N1P/PPP2PP1/RNBQK2R b KQkq - 0 8 | Nb4 | Identify any White knight outposts on the board. | None | outposts |
1B6/1p6/4k2p/p1p3p1/P5b1/2P5/2P4P/5K2 w - - 0 32 | Ke1 | Is the move from f1 to e2 legal? | No | legality |
r1bk1b1r/pp1q1pp1/n1nP4/2p1N3/2PpN1p1/PQ4B1/1P1K1P1P/4RB1R b - - 3 17 | Nxe5 | Does Black have any passed pawns? | Yes: d4 | structure |
rn3brk/2p3p1/pp1q3p/5Q1R/8/1P4P1/PBP2P1P/4R1K1 w - - 0 25 | Re6 | Is the move from f5 to e5 legal? | Yes | legality |
8/3Q1kp1/3p1p1p/p2q4/8/6PP/P4P1K/8 b - - 3 36 | c8d7 | Is the Black king in check? | Yes | check |
3r1r1k/1ppbqpb1/p1n4p/4p1p1/P1B1P3/1NP3P1/1P1NQPP1/R3R1K1 w - - 3 19 | Nf1 | Does White have any isolated pawns? | No | structure |
r3r3/pp1k1p1P/4q1p1/1B1pPp2/7Q/P7/1PP5/1K2RR2 b - - 4 32 | Kc7 | Are there any open files in this position? | No | files |
1r4k1/5p1p/p1b3p1/1p6/2p5/2P2P1P/P3NKP1/1R6 w - - 2 28 | Nd4 | What piece is on f7? | Black Pawn | occupancy |
2r2r1k/pp1nbpp1/2q1p2p/3pP2P/P4B2/2P3R1/1P1N1PP1/R2Q2K1 w - - 5 19 | Nb3 | Is the move from g1 to g7 legal? | No | legality |
b1kq3r/p3bQ2/4pp1p/8/7N/2N1P3/PP4PP/n2K3R w - - 6 23 | d7c8 | Is the Black king in check? | No | check |
1rbr2k1/5p2/p1n2Qp1/1pq1p1p1/4P3/1BP4P/PP3PP1/R3R1K1 b - - 1 24 | Kh7 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
rn3rk1/pb2qppp/1p1ppn2/2p5/2PP4/B1P2NP1/P1Q1PPBP/R4RK1 w - - 4 11 | Nh4 | What piece is on d2? | Empty | occupancy |
2bqkb1r/r1p2ppp/2n1pn2/6B1/N2p4/8/P3PPPP/R2QKBNR b KQk - 1 12 | e3g5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r2q1rk1/4npbp/p2pP1p1/1ppP4/4nP2/2N5/PP2Q1PP/R1B2RK1 w - - 0 16 | Nxe4 | Is the Black king in check? | No | check |
rnbqkb1r/pp1p1ppp/4pn2/6B1/3P4/5N2/PPP2PPP/RN1QKB1R b KQkq - 0 5 | b6 | Is the move from f8 to b4 legal? | Yes | legality |
2rqr1k1/pb1n1pb1/1p3np1/2P3Bp/3PP3/P1N3N1/2Q1B1PP/1R3RK1 b - - 1 21 | Nf8 | Identify any White knight outposts on the board. | d5, d6 | outposts |
2r1k2r/pp1bbppp/1q2pn2/3p4/3P1BP1/P1N1QP2/1PP1NK1P/R6R w k - 4 14 | h4 | What piece is on b5? | Empty | occupancy |
r2qkb1r/pbpn1pp1/1p1ppn1p/8/8/1PNP1NP1/PBPQPP1P/R3KB1R w KQkq - 0 8 | O-O-O | What piece is on b5? | Empty | occupancy |
3r3r/1k3p2/1pb1p1np/2p1P2R/2P3R1/p1P1BP2/P1B1K1P1/8 w - - 1 29 | Ke1 | Identify any Black knight outposts on the board. | a5, c5 | outposts |
rnbqk2r/pp3ppp/3ppn2/2p5/1bPP4/2N1P1P1/PP2NP1P/R1BQKB1R b KQkq - 0 6 | d5 | What piece is on c1? | White Bishop | occupancy |
8/8/6P1/2k5/4KP2/1p6/1N1r4/8 w - - 3 83 | Kf3 | What piece is on f2? | Empty | occupancy |
r1b1k2r/1ppq1ppp/pn2p3/8/1bpPN3/4P1P1/PP1B1PBP/R2QK2R b KQkq - 1 11 | a5 | Identify any White knight outposts on the board. | None | outposts |
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