fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq - 1 3 | Nc6 | Is the move from g7 to g2 legal? | No | legality |
2r1q1k1/b6p/2P1PQp1/4p3/2B1P3/7P/5PP1/6K1 w - - 2 36 | e7+ | What piece is on e8? | Black Queen | occupancy |
r1bqk2r/1pppnppp/pbn5/8/BP2P3/P1N2N2/5PPP/R1BQ1RK1 b kq - 0 10 | O-O | What piece is on a2? | Empty | occupancy |
r1b2rk1/ppp1Rpp1/2np3p/2q5/1bB4B/1Q3N2/PP3PPP/3R2K1 b - - 1 16 | e4e7 | What is the material balance in this position? | Black is up 2 pawns of material | material |
r2q3r/pppkn1Np/1b1p2n1/1P6/P1P1P3/3B1Q2/5PPP/R3K2R w KQ - 5 18 | Qh3+ | Identify any Black knight outposts on the board. | None | outposts |
2r1k2r/pp1nbpp1/1q2p3/3pP2p/3pP2N/1PPQ1N1P/P5P1/R4RK1 w k - 0 18 | c5d4 | Identify any Black knight outposts on the board. | e3, e4 | outposts |
1r1r2k1/1p3p2/p1p3p1/7p/2P4P/2b3P1/PP3QB1/2R3K1 b - - 0 30 | Bd4 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
rn1qkbnr/p3pppp/2p5/1p6/2p3b1/N4NP1/PP1PPPBP/R1BQK2R w KQkq - 0 6 | Ne5 | Is the move from f3 to d4 legal? | Yes | legality |
r1b1kb1r/pp1npppp/5B2/q1p5/3PP3/2N5/PPP3PP/R2QKBNR b KQkq - 0 7 | exf6 | Is the White king in check? | No | check |
r3kb1r/1bq2pp1/p2ppn1p/1p6/3BPP2/2N1Q3/PPP3PP/2KR1B1R w kq - 3 13 | Bb6 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
r4rk1/p5p1/2pp3p/2p1p3/5q1b/1P1PNP1P/PBP1Q3/R4RK1 b - - 2 18 | d1e2 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r3k1/2P1R1p1/pp3pp1/2nb4/3N4/B6P/P4PP1/6K1 w - - 0 32 | Bxc5 | Is the move from g1 to f1 legal? | Yes | legality |
r1bqk1nr/p2pppbp/2p3p1/2p5/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 2 6 | Re1 | Are there any open files in this position? | No | files |
r1bq1rk1/pp3pbp/2nQ2p1/1N3p2/2B1P3/2N5/PPP2PPP/2KR3R b - - 1 11 | Qb6 | What is the material balance in this position? | White is up 1 pawn of material | material |
8/p5p1/1p2p1k1/4Bp2/8/8/PP3PK1/2q5 b - - 2 34 | g1g2 | Identify any Black knight outposts on the board. | d5, f5 | outposts |
2rr4/p3k1p1/1pP4p/3Ppp2/7n/P1R2P2/2B2P1P/3R1K2 b - - 2 27 | Kd6 | Does Black have any isolated pawns? | No | structure |
B4rk1/2q2ppp/b3pn2/p1P3N1/1pp5/6P1/PPQ2P1P/3RR1K1 b - - 0 21 | Rxa8 | Is the Black king in check? | No | check |
r1bqk2r/bp1pnppp/p1n1p3/8/2P1P3/1NNB4/PP3PPP/R1BQ1RK1 b kq - 2 9 | Ne5 | Is the move from e8 to h2 legal? | No | legality |
r3qrk1/p2n1p1p/1p1bp1p1/1B4B1/3P3R/5Q2/PP3PPP/2R3K1 w - - 1 18 | Qb7 | Identify any Black knight outposts on the board. | d5 | outposts |
r3k1nr/p1pp1ppp/1bnq4/4p3/2P1P3/1N3N2/1P2BPPP/R1BQ1RK1 b kq - 0 13 | d3c4 | What is the material balance in this position? | White is up 2 pawns of material | material |
rnbqkbnr/pppp1p2/7p/6pQ/2B1Pp2/7N/PPPP2PP/RNB1K2R b KQkq - 1 5 | Qf6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r2qr1k1/ppp2pnp/3pb3/8/2PQPp2/2NB4/PP4PP/R4RK1 w - - 0 17 | Nd5 | Are there any open files in this position? | No | files |
r2qk2r/pp1b1ppp/2n1pn2/4P1B1/Qbpp4/2N2N2/PP3PPP/2KR1B1R w kq - 4 10 | Ne4 | What piece is on h4? | Empty | occupancy |
r2q1rk1/pp2p1bp/n1pp2p1/5b2/2PP4/5NP1/PP3PBP/R1BQR1K1 b - - 2 12 | Qd7 | Are there any open files in this position? | No | files |
rn3rk1/pp3p1p/1n3BpQ/2qPP3/8/1BN2P2/PP5P/R3K1b1 b Q - 3 19 | Qe3+ | Does White have any isolated pawns? | Yes: h2 | structure |
r1bqk2r/ppb1nppp/4p3/3pP3/1P1p1P2/P4N2/2PB2PP/R2QKB1R b KQkq - 2 11 | Bb6 | Is the move from h7 to h5 legal? | Yes | legality |
8/8/1nk2B2/p1p4p/P3PP1P/2K5/8/8 b - - 0 48 | Nxa4+ | Does White have any passed pawns? | Yes: e4, f4 | structure |
3rrnk1/4bpp1/pq6/1p1PPB1p/P1p4P/6P1/1P5K/R1BQR3 w - - 0 28 | Re2 | Identify any Black knight outposts on the board. | b3, d3 | outposts |
r1bq1rk1/p3ppb1/3p1np1/1NpPn3/2P1P2p/4BP2/PP2B1PP/R2QKN1R b KQ - 1 12 | h3 | Is the White king in check? | No | check |
8/2pNnBk1/p4Rp1/P7/1p2P1p1/1N1Pq1P1/1PP2RK1/7r b - - 6 32 | Qh6 | Does Black have any passed pawns? | No | structure |
r3k1nr/p2b1ppp/1qp5/1B1QP3/8/8/PPP2bPP/R4K1R w kq - 0 13 | b7c6 | What is the material balance in this position? | Black is up 5 pawns of material | material |
r2qnrk1/pp2bppp/8/3N4/3BP3/6QP/PPP5/2K2BR1 b - - 4 20 | f6 | What is the material balance in this position? | Black is up 2 pawns of material | material |
r1b2rk1/ppp5/n4qp1/7p/2PN2p1/2P3B1/P3RPPP/R2Q2K1 b - - 1 20 | Nc5 | Is the move from c7 to b4 legal? | No | legality |
8/8/3P4/2R1k3/6P1/8/PP5P/6K1 b - - 0 37 | d5d6 | Is the Black king in check? | Yes | check |
rnbqkb1r/pppp1ppp/4pn2/8/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq - 0 3 | d5 | Identify any Black knight outposts on the board. | None | outposts |
2r1k2r/1p1n1pp1/pq2pn1p/3p4/3P1B2/Q1P3P1/PP2BP1P/R4RK1 w k - 0 17 | Rac1 | What piece is on c8? | Black Rook | occupancy |
2r1nrk1/6p1/1p2p2p/p2pP3/Pb1P1P1q/1R2Q3/1P3P2/R3NBK1 w - - 0 28 | Nd3 | Is the move from a4 to d2 legal? | No | legality |
r1k2b1r/ppp2pp1/8/2pnPb1p/8/1P5P/PBP1NPP1/2RN1RK1 w - - 0 17 | a3 | Identify any Black knight outposts on the board. | None | outposts |
5K1k/8/8/5b2/7R/8/8/8 b - - 10 8 | Bh7 | Are there any open files in this position? | Yes: a, b, c, d, e, f, g, h | files |
r2r2k1/1pq2pp1/4b2p/2pRnN2/p1PnP3/P5NP/1P1QBPP1/3R2K1 b - - 5 28 | Bxd5 | Is the move from g8 to f2 legal? | No | legality |
rnbqkb1r/pp2pppp/3p1n2/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq - 1 4 | Be2 | Is the Black king in check? | No | check |
4k2r/r5pp/p3pb2/1p3p2/1n6/1P2PB2/P4PPP/1RBR2K1 b k - 2 20 | Nxa2 | What piece is on e7? | Empty | occupancy |
1r1q1rk1/pQpnbppp/4p3/2Pp4/3Pn3/5N2/PP2BPPP/R1B1K2R w KQ - 5 12 | Qc6 | Does Black have any passed pawns? | No | structure |
3r3k/1b4r1/p4p1p/1p3P2/3P4/3B4/P1P3PP/4RR1K w - - 2 29 | Be4 | Does White have any passed pawns? | Yes: d4 | structure |
2r1k2r/pp3p2/1qn1p3/3pPpbp/1p1P1P2/P2QB3/2P3PP/R4RK1 w k - 0 17 | e7g5 | What is the material balance in this position? | Black is up 4 pawns of material | material |
r3kbnr/ppp1qppp/2n5/4P3/2Pp2b1/P4N2/1P1NPPPP/R1BQKB1R w KQkq - 3 7 | g3 | What piece is on g3? | Empty | occupancy |
r1b4r/pp2kppp/3P4/1Np1p3/3n4/8/PPP2PPP/2KR1B1R b - - 0 13 | Kd8 | What piece is on b8? | Empty | occupancy |
r1b2k1r/ppBpnp1p/B2N1b2/8/3PP3/8/PPP3PP/R3K2R b KQ - 0 12 | bxa6 | What piece is on a5? | Empty | occupancy |
r1bqkb1r/pppp1ppp/2n5/4p3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 0 5 | Bxf7+ | Is the e-file open, semi-open, or closed? | semi-open for White | files |
3rrbk1/5R2/3p3p/2p1pQ2/2P1Pqn1/3P4/5NP1/6K1 w - - 1 3 | Qh7# | Identify any White knight outposts on the board. | None | outposts |
4r3/pp1R2k1/2n2p2/2N1pP2/2P3P1/8/PP3K1P/8 b - - 1 32 | Kg8 | Is the Black king in check? | Yes | check |
r1b4r/5Rp1/pQ2p2p/4q3/1P4P1/1k6/3B3P/3K4 b - - 2 35 | Bb7 | Is the move from e5 to d4 legal? | Yes | legality |
r5k1/pp3Nbp/4Q3/2p1Pp2/8/8/PPP3PP/6K1 w - - 1 27 | Nh6+ | Does Black have any isolated pawns? | Yes: f5, h7 | structure |
r1r3k1/1nqbbppp/3p1n2/1ppPp3/1P2P3/2P1BN1P/2BQ1PP1/R3RNK1 w - - 7 20 | Bd3 | What is the material balance in this position? | Equal | material |
rn1q1k1r/p1ppp1bP/1p3nQ1/8/3P2b1/3B4/PPP2P1P/RNB1K1R1 w Q - 2 11 | f3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnb1k1nr/pppp1ppp/8/2b1p3/2P1P3/3P4/PP1N1qPP/R1BQKBNR w KQkq - 0 5 | f6f2 | Is the Black king in check? | No | check |
rn1qkb1r/pp2pBpp/2p5/8/P2P2b1/4PN2/1n1B1PPP/R4RK1 b kq - 0 10 | c4f7 | Is the Black king in check? | Yes | check |
8/7k/7p/5pp1/8/6KP/6P1/8 w - - 0 40 | g7g5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
4r3/R6p/1pk2p2/2p1p3/2P4P/2q2r2/4QPK1/3R4 w - - 6 29 | Qe4# | Are there any open files in this position? | Yes: a, d, g | files |
r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq - 3 5 | Nc3 | Does Black have any passed pawns? | No | structure |
2k1r3/1pp2ppp/p1r1p3/2P5/1P3R2/P3Q2P/2q2PP1/4R1K1 w - - 5 26 | f5c2 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/8/p3p3/1p1k4/1P3pp1/2P3N1/5KPn/8 w - - 0 46 | f5f4 | What is the material balance in this position? | Black is up 2 pawns of material | material |
rnb4r/1p2kppp/p3pn2/2b5/2B5/4PN2/PP1N1PPP/R1BR1K2 b - - 3 10 | Rd8 | Identify any Black knight outposts on the board. | None | outposts |
4q1k1/5pb1/2p3p1/1rNr3p/QPRp3P/P5P1/3R1P2/6K1 w - - 3 32 | Qd1 | What piece is on h1? | Empty | occupancy |
r4rk1/1b3ppp/1p2pn2/p7/Pp6/3P1NP1/6BP/1N2K2R b K - 2 21 | f1g2 | What is the material balance in this position? | Black is up 5 pawns of material | material |
2r5/pb5k/1pn5/6Qp/8/P4N2/1q3PPP/4R1K1 w - - 2 27 | Re6 | What piece is on b7? | Black Bishop | occupancy |
r7/8/8/8/8/1Rn5/6k1/Nn1K4 w - - 4 3 | Kc1 | Is the f-file open, semi-open, or closed? | open | files |
2rq1rk1/pb2bp1p/1pn1p1p1/3n2B1/3P4/P1NQ1N2/1P3PPP/1BR2RK1 w - - 0 16 | h4 | What piece is on h2? | White Pawn | occupancy |
2r5/6pp/1P2k3/8/8/7P/6P1/1R5K b - - 0 37 | Rb8 | What piece is on h7? | Black Pawn | occupancy |
5bk1/4pR1p/4P3/Rpr2K2/8/1P6/P7/8 w - - 1 53 | Kg4 | Identify any Black knight outposts on the board. | None | outposts |
1q3rk1/p2bp1bR/3p2Q1/1p1P2p1/2rN2P1/4BP2/PPP5/1K6 b - - 5 24 | Rf7 | Is the f-file open, semi-open, or closed? | semi-open for Black | files |
r1b4B/ppk5/n2q4/2p3r1/2Pp2p1/PQ6/1P1K1PBP/4R2R b - - 3 24 | Qh6 | Is the move from b7 to e2 legal? | No | legality |
4r3/1p3bk1/p2q1pp1/n2p4/3P3p/P1NQN2P/1P3PP1/3R2K1 w - - 2 28 | b4 | Identify any White knight outposts on the board. | None | outposts |
8/8/8/5Rk1/6P1/6K1/8/8 b - - 6 71 | f1f5 | What is the material balance in this position? | White is up 6 pawns of material | material |
rnbq1rk1/ppp1n1b1/3pp2p/5pp1/2PP4/2N2NPP/PP2PPB1/R1BQ1RK1 w - - 0 9 | b4 | Is the move from c4 to g3 legal? | No | legality |
r1b1Qbk1/1pq3p1/p6p/2p5/2np4/5N2/PP1B1PPP/2KRR3 b - - 3 22 | b5 | Identify any White knight outposts on the board. | None | outposts |
r1bq1rk1/4bppp/p2ppn2/1p4P1/3BP3/2N2P2/PPPQ3P/2KR1B1R b - - 0 12 | Nd7 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
3r2k1/p2n1pp1/qp1P1b1p/2pQ4/4RB2/5N2/PP3PPP/6K1 b - - 0 1 | Nf8 | Identify any Black knight outposts on the board. | d4 | outposts |
4q1k1/p1b4p/5pp1/1p2p3/4QPP1/P1B1P2P/1P4K1/8 b - - 0 32 | Qd7 | Does Black have any isolated pawns? | No | structure |
1r4k1/1B4pp/8/2rPnp2/1R6/1P2P2P/3K2P1/1R6 b - - 0 26 | Rc7 | Does Black have any isolated pawns? | No | structure |
r4r1k/1p2p1b1/2ppb3/p1Pn2pq/N2P4/1P2NpP1/P1QR4/2R1BBK1 b - - 0 29 | Nxe3 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
8/pp5k/7p/3P1q2/3R1P2/8/PP2K3/8 b - - 4 41 | f2e2 | What is the material balance in this position? | Black is up 3 pawns of material | material |
4R3/8/1ppk4/8/4N3/3n2K1/P4P2/8 b - - 0 43 | f6e4 | Is the Black king in check? | Yes | check |
r5k1/pr4b1/2p3pp/3np1PP/2B5/5P2/PPP5/1K1R3R w - - 0 26 | Rxd5 | Is the move from f3 to a1 legal? | No | legality |
r7/ppp4p/1bp1k3/4pp2/8/BPP5/P2N1prP/R2K3R w - - 0 22 | Rf1 | Is the move from h2 to b1 legal? | No | legality |
3r4/p3kp2/1p2pn2/4p2p/2P1P3/1PN1K1P1/P7/7R b - - 3 30 | Rd4 | Does White have any isolated pawns? | Yes: e4, g3 | structure |
r1b1nrk1/p3qpbp/1pp3p1/2p1pP2/4P3/2NP1N2/PPP3PP/R1B1QR1K w - - 2 12 | fxg6 | Identify any Black knight outposts on the board. | None | outposts |
5r2/1p1Np1k1/2ppB3/p1P3p1/8/1P4P1/P3p3/5K2 w - - 0 43 | Kxe2 | Does Black have any passed pawns? | Yes: e2, e7 | structure |
2R2k2/5p2/6p1/2P5/8/5KN1/8/3r4 b - - 2 40 | c6c8 | What is the material balance in this position? | White is up 2 pawns of material | material |
2R5/2p5/pp2r3/5pk1/PKP4p/4P2P/5P2/8 b - - 27 52 | f4 | What piece is on g5? | Black King | occupancy |
2kr3r/ppp2ppp/2n1bq2/8/2P3n1/2NPPN2/PP2Q1PP/2KR1B1R b - - 6 11 | Qh6 | What piece is on d5? | Empty | occupancy |
1k2r3/pp3pb1/7p/2R5/4p3/3bNNPB/PP3P1P/1K5R w - - 1 22 | c4d3 | Is the White king in check? | Yes | check |
8/1p1nk1p1/p3pp2/7r/3N4/8/PPP2P2/2K1R2B b - - 1 26 | f3d4 | What is the material balance in this position? | White is up 2 pawns of material | material |
8/2k5/Kpqp1n2/p1p4p/P1P2P2/3p3Q/8/2B5 b - - 2 57 | b5+ | Is the White king in check? | No | check |
r1bQ1b1r/p4kp1/2p2n1p/1p6/4P3/2NKB3/PPP2P1P/R5n1 b - - 1 15 | Nf3 | Is the move from f7 to b5 legal? | No | legality |
R1rk4/8/1P1K2p1/3P1pP1/4pP2/1b6/8/8 w - - 2 59 | b7 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r1bqnrk1/3nbppp/pp1p4/2pPp3/P1P1P2P/2N3P1/1P2QPB1/R1B1K1NR w KQ - 1 11 | Bh3 | Is the move from a4 to a5 legal? | Yes | legality |
3rr3/pp1q1kpp/2n5/2Pp1np1/B5b1/6BP/PP2QPP1/3RR1K1 w - - 0 23 | Qxg4 | What piece is on b4? | Empty | occupancy |
r2q2r1/p2k1p2/b4N2/8/1n4Pp/2N2P1P/PPP3B1/4RRK1 b - - 2 23 | d5f6 | Is the Black king in check? | Yes | check |
r1bqk2r/1pp2pp1/2np1n1p/p1b1p3/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 w kq - 0 8 | b3 | Is the h-file open, semi-open, or closed? | closed | files |
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