fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r1bqk2r/pp1nbp2/3ppn1p/2p1P1p1/3P1P2/2PB2B1/PP1NQ1PP/R3K1NR b KQkq - 0 11 | Nd5 | What piece is on a2? | White Pawn | occupancy |
2kr3r/p1pp3p/b1p3p1/2P1Pp2/3q1P2/1PR2Q2/P5PP/4KB1R b K - 0 18 | Bb7 | What piece is on b5? | Empty | occupancy |
r1bqk2r/ppppn1pp/4p3/b1P1P3/8/3N4/PP3PPP/RNBQ1RK1 w kq - 1 12 | b4 | Is the move from a1 to a3 legal? | No | legality |
4kq1r/pp1b1pp1/4p2n/1B1pP1Q1/8/1N4R1/P4PPP/6K1 w k - 2 25 | Rc3 | Is the move from b5 to c1 legal? | No | legality |
5k2/8/5P2/2K5/1p6/3B4/1p6/8 w - - 0 5 | Kd6 | What is the material balance in this position? | White is up 2 pawns of material | material |
4rr1k/2p3p1/p1qpp1np/1p2p2n/PP2P1NP/1QPPR1P1/R4PKN/8 w - - 0 27 | Nf3 | What is the material balance in this position? | Equal | material |
r6k/6bp/p3Q1p1/4P3/1B3Pn1/8/1qPK2PP/3R3R w - - 3 27 | Qc4 | Is the move from e6 to g8 legal? | Yes | legality |
4k2r/ppq1ppbp/2bp1np1/4P3/2rB3P/1NN2P2/PPPQ2P1/2KR3R b k - 0 16 | dxe5 | Does White have any isolated pawns? | No | structure |
8/5K2/8/8/8/2Q5/3p4/3k4 b - - 11 7 | Ke2 | What is the material balance in this position? | White is up 8 pawns of material | material |
r1b1k1r1/3nb3/p1q1pn2/1p2p3/6pB/2NB4/PPPQ2PP/2KR1R2 w q - 2 24 | Qh6 | Does White have any isolated pawns? | No | structure |
4rrk1/2p4p/p7/1p1p2p1/3P4/3n1N1P/PP4P1/R1BB2K1 b - - 0 22 | Rxf3 | What piece is on f3? | White Knight | occupancy |
2r1r1k1/2p2p2/np4p1/p3NnPp/1qP2P1P/1P6/PQ1R3K/2B1R3 b - - 9 8 | Nxh4 | Identify any Black knight outposts on the board. | None | outposts |
3k4/2p2p2/1p5p/p1p1P1p1/P1PB2P1/1P3P1P/5K2/8 b - - 0 30 | cxd4 | Is the move from f7 to f4 legal? | No | legality |
r1bb1rk1/pp1p1p2/5n1p/3NB1p1/1p2P3/1P6/P1P2PPP/R3KB1R w KQ - 2 15 | e7d8 | Identify any White knight outposts on the board. | d5 | outposts |
8/1r3pk1/6pp/1p1R4/2p5/2P4P/1P4PK/8 w - - 2 42 | Rd6 | What piece is on g8? | Empty | occupancy |
3r1r1k/1p2q1pp/2pnbb2/p1QpBp2/3P2P1/3BPP1P/PP2N3/R4RK1 w - - 3 21 | Qxa5 | Are there any open files in this position? | No | files |
r1b1kb1r/1pqn1ppp/p2pp3/6B1/3NP3/2N5/PPP2PPP/R2QR1K1 b kq - 0 10 | Ne5 | Identify any Black knight outposts on the board. | None | outposts |
r1b3k1/2q5/p3p1p1/2pp4/Pp6/1P1P3R/1P4PN/R1B4K b - - 0 28 | e5 | Does Black have any passed pawns? | No | structure |
rnbq1rk1/ppp1ppbp/3p1np1/8/2BPP3/2N2N2/PPP2PPP/R1BQK2R w KQ - 4 6 | Bg5 | Is the h-file open, semi-open, or closed? | closed | files |
1r3rk1/p1p2ppp/5n2/b7/2B2P2/P3P3/1P2K1PP/R1nN3R w - - 0 16 | d3c1 | Is the Black king in check? | No | check |
r3k2r/pb2b1pp/1q2p3/3p4/3P4/P2BP3/6KP/RN1Q1R2 w kq - 1 17 | Nd2 | Does White have any passed pawns? | No | structure |
1r6/2p2kpp/p2p4/Pp6/8/2P5/1P1N2K1/R7 b - - 1 25 | Re8 | What is the material balance in this position? | Equal | material |
r1b1k2r/pp3pbp/1nnqp1p1/1N6/3P4/4BN2/PP3PPP/R2QKB1R b KQkq - 3 13 | Qd8 | Are there any open files in this position? | Yes: c | files |
2r2rk1/2p1bppp/p2qpn2/1p4N1/3P3P/3B4/PPP1QPP1/1K1R3R w - - 3 17 | g4 | Does Black have any isolated pawns? | No | structure |
nbr2kbr/6pp/3n4/pp1Np3/2p4q/2P2P2/PP2P1PB/1BRQNK1R w KQkq - 0 12 | g4 | Are there any open files in this position? | Yes: d | files |
1r1r1k2/pp3ppp/2n5/1R1p4/3P4/2P5/P1B2PPP/4R1K1 w - - 2 18 | h4 | Does White have any passed pawns? | No | structure |
5rk1/pp3pp1/4p2q/4N2P/1b1Pb2R/1P2P1Q1/P2r1P2/3K4 w - - 12 31 | c2d2 | Is the White king in check? | Yes | check |
rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq - 0 3 | d5c4 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1r4k/pp2bpp1/4p2p/3pP2P/1qPNnB2/4R3/5PP1/2RQ2K1 w - - 0 27 | cxd5 | Does Black have any passed pawns? | Yes: a7 | structure |
1r4k1/4ppbp/3p2p1/3P4/q1p1P3/Pr4PP/QP2RPK1/2BN4 w - - 1 28 | f4 | Identify any Black knight outposts on the board. | d3 | outposts |
6k1/pp3p1p/6p1/8/3p4/1P2q3/1P1Q2PP/5K2 w - - 4 34 | Qxe3 | What piece is on d8? | Empty | occupancy |
1k6/pp5p/3r1np1/2pP1p2/2P2P2/R3PB2/P6P/6K1 w - - 3 28 | Rb3 | Is the move from g1 to e6 legal? | No | legality |
1r2r1k1/1b4b1/ppp1p3/6Q1/3P4/5R2/PPP2PPP/6K1 w - - 1 30 | Rg3 | What is the material balance in this position? | White is up 1 pawn of material | material |
2r1k2r/1p1b1ppp/p3p3/2p5/2N1P2b/2N5/PPP2P1P/2KR2R1 w k - 0 18 | Nd6+ | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1b2rk1/p4p1n/1pP3p1/1B1p3Q/4p2B/P1P1P2q/3K1P1P/R5R1 w - - 1 23 | Rxg6+ | What is the material balance in this position? | Equal | material |
r2r2k1/1p3p2/nppqb2Q/4p3/1P2B3/2PP4/P4PPP/R3K2R w KQ - 3 24 | f4 | Is the move from h6 to f6 legal? | Yes | legality |
3r3k/pp4b1/2p1B3/2P1p2p/1P2P3/6NK/PB6/5r2 b - - 0 35 | Rf2 | Does White have any isolated pawns? | Yes: e4 | structure |
5rk1/2p1q1b1/p1n1p1pp/1p6/nP1pPpN1/PN1P1Q1P/2P2PP1/4RRK1 b - - 1 32 | e5 | Identify any White knight outposts on the board. | None | outposts |
r4r1k/1p2q2p/2pnb1p1/p2pPp2/6P1/3BPPNP/PPQ5/4RRK1 b - - 0 22 | Nf7 | Are there any open files in this position? | No | files |
r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq - 2 6 | Nxc6 | Are there any open files in this position? | No | files |
2br4/pp2kpr1/2p1p1BQ/6R1/3P4/P1P2q2/1P3PP1/6K1 w - - 0 32 | gxf3 | What is the material balance in this position? | Black is up 4 pawns of material | material |
r2q1rk1/p4pp1/1p2pn1p/n7/3P1B2/P1N2QP1/1P3P1P/R4RK1 w - - 2 18 | d5 | Identify any Black knight outposts on the board. | d5 | outposts |
2r2rk1/R2n1p1p/4pn2/1pq3p1/5Q2/5BP1/1P1NPP1P/R5K1 w - - 0 22 | Qe3 | Identify any Black knight outposts on the board. | None | outposts |
8/1p4pk/3BB2p/8/1P2p2P/p2n2K1/q7/8 w - - 0 44 | Bxa2 | Identify any White knight outposts on the board. | None | outposts |
1R6/p4Q2/1pkp4/3Bp3/3pP1bp/P2P4/1PP3PP/R5K1 b - - 1 30 | a2d5 | Is the White king in check? | No | check |
r3kbnr/pppq1ppp/3p4/1Q6/2n1P3/2N4P/PPPP1PP1/R1B1K2R w KQkq - 2 9 | Qxc4 | What piece is on e7? | Empty | occupancy |
r2r2k1/pp1bqppp/1bn1pn2/3p4/2PP4/P2BPN2/1B1N1PPP/R2Q1RK1 w - - 7 12 | Ne5 | Is the move from f3 to e1 legal? | Yes | legality |
r3k3/p4p2/n1pb4/1p1p3p/3PpPn1/P3P3/2PBN1Kq/R2Q4 w q - 1 22 | h4h2 | What is the material balance in this position? | Black is up 5 pawns of material | material |
2r2k2/5bp1/7p/5N1P/5KP1/1p3P2/1P1R4/8 w - - 5 41 | Rd7 | Is the move from f5 to e7 legal? | Yes | legality |
2r3k1/3bppbp/3p2p1/3P4/1p1B4/5P2/qPBK1QPP/3R3R b - - 3 19 | Rxc2+ | What is the material balance in this position? | White is up 4 pawns of material | material |
r1b3k1/ppq3p1/4pr1p/3pn3/5P2/PNNRQ3/1PP3PP/5R1K w - - 3 21 | Rxd5 | Are there any open files in this position? | No | files |
r3b1k1/p3rppp/2p1nq2/3p4/8/1P2BPN1/P1PQ2PP/3RR1K1 w - - 1 22 | Ne2 | Does White have any isolated pawns? | No | structure |
8/p2nk1p1/1q5p/3pPp1P/2pP1P2/2P5/4N3/Q5K1 w - - 0 34 | Ng3 | Does White have any passed pawns? | Yes: e5 | structure |
4Q3/1p3rbk/p1p2r1p/3p2q1/2nP4/5P2/P3RR1P/6K1 w - - 0 38 | f4g5 | Is the White king in check? | Yes | check |
rnb1k2r/pp2ppbp/1qpp1np1/8/3PP3/2N1B3/PPPQ1PPP/1R2KBNR w Kkq - 2 7 | f3 | Are there any open files in this position? | No | files |
rr4k1/4ppbp/3p2p1/q1pP4/2n1P3/P1N3P1/1PQ2PKP/R1B2R2 b - - 0 18 | Rb7 | What piece is on g2? | White King | occupancy |
r1bq1rk1/pp3ppp/2n2n2/2bp4/8/2N1PN2/PP2BPPP/R1BQ1RK1 b - - 3 9 | Be6 | What piece is on d1? | White Queen | occupancy |
r4rk1/ppqn1ppp/2pb1n2/3p2B1/3P2b1/2PB1N2/PPQN1PPP/R3R1K1 b - - 7 11 | Rae8 | Is the move from f6 to g6 legal? | No | legality |
1r1r2k1/5p2/6p1/2qpR2p/P7/2P2P2/P2Q2PP/4R2K w - - 0 32 | f4 | Is the move from d2 to d3 legal? | Yes | legality |
rn2k1nr/pp3p1p/2p1b2b/q7/4P3/2PP2B1/P3Q2P/R2NKBNR b KQkq - 0 12 | Nd7 | Identify any White knight outposts on the board. | f5 | outposts |
rnb2rk1/pp2ppbp/2p2n1B/q6p/3P4/2N5/PPPQ1PP1/2KR1BNR w - - 0 11 | Bd3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4rk1/pp2bpp1/2p2n1p/4p3/4q3/1B5P/PPP1QPP1/RN3RK1 w - - 0 15 | Qxe4 | Does White have any isolated pawns? | No | structure |
r1bq1rk1/ppp1n1bp/3p1n2/P1PPp1p1/1P2Pp2/2N5/3NBPPP/R1BQ1RK1 w - - 0 14 | g4 | What piece is on g7? | Black Bishop | occupancy |
rn1q1rk1/pbp1bppp/1p2pn2/3pN3/2PP4/2N3P1/PP2PPBP/R1BQ1RK1 b - - 1 8 | c6 | Are there any open files in this position? | No | files |
rnbqkb1r/pppp1ppp/8/8/2BQn3/5N2/PPP2PPP/RNB1K2R b KQkq - 0 2 | Nf6 | Identify any Black knight outposts on the board. | None | outposts |
8/8/N2k2b1/1p6/3p3p/1P3P2/P5P1/2K5 b - - 0 34 | Bd3 | What piece is on d4? | Black Pawn | occupancy |
5Q2/2q2p1k/p4P1p/4P1pP/1P2R3/P7/6PK/2q5 b - - 2 40 | Qxe5+ | Does Black have any isolated pawns? | Yes: a6 | structure |
7k/1p4p1/1r6/p4pq1/3Qp2p/8/K3R1PP/8 b - - 0 40 | Qf6 | Is the move from e4 to e3 legal? | Yes | legality |
r4k2/p3p1bB/2ppq3/3n2P1/2QP4/P1N1p3/1P3r2/2K1R2R b - - 6 29 | Rc8 | Does White have any isolated pawns? | Yes: d4, g5 | structure |
3r1rk1/p4p1p/6p1/2p5/3P2q1/1P6/PBQN1P1K/2R2R2 b - - 2 23 | Rd5 | Identify any White knight outposts on the board. | a4, c4, c5 | outposts |
5r2/7p/8/2N1k3/1p5R/5P2/1PP3PP/r1K5 w - - 2 32 | Kd2 | Identify any White knight outposts on the board. | e4 | outposts |
5q1k/pp5p/2np4/2p1rp2/P1B5/1P4Q1/2P3PP/5RK1 w - - 3 22 | Rd1 | Does White have any passed pawns? | No | structure |
1r3r1k/pp1b2q1/4p2p/1PPpNp2/5P2/7P/P2Q2P1/3RR1K1 w - - 2 29 | Qd4 | Does White have any passed pawns? | No | structure |
7k/Q7/6Rp/p4P1P/P7/8/5PqK/8 w - - 3 46 | Kxg2 | Is the move from a7 to b5 legal? | No | legality |
2krr3/1pp2ppp/8/p2Pnn2/1b6/1PN1B3/1P2BPPP/R2R2K1 w - - 3 17 | Ba7 | Is the Black king in check? | No | check |
6k1/6P1/7K/8/8/8/8/8 w - - 1 18 | Kg6 | Is the d-file open, semi-open, or closed? | open | files |
3qr1k1/1p3pp1/2p4p/3p1P1b/1PP3PN/3Q3P/6B1/b4RK1 w - - 0 31 | Nf3 | Are there any open files in this position? | Yes: a, e | files |
3Q4/8/2K3p1/6k1/7p/8/8/8 b - - 1 60 | b8d8 | Is the Black king in check? | Yes | check |
7r/p1pkn1q1/1p1b4/5p2/3P2p1/3NP1Pp/PPP1QPKP/RNB2R2 w - - 0 19 | h4h3 | Is the Black king in check? | No | check |
rn3rk1/pb1qb1pp/8/1p1pPp2/2p5/2N3P1/1P2QPBP/2R1NRK1 w - - 1 19 | e6 | Is the move from c1 to c2 legal? | Yes | legality |
r3k1nr/pp1qppbp/3p2p1/3P4/Q3P3/2N2N2/PP4PP/R1B1K2R b KQkq - 1 12 | Bxc3+ | Is the White king in check? | No | check |
2rr2k1/pb3pbp/1pn1p1p1/1B4B1/1q1PP2P/3Q4/P3NPP1/2RR2K1 b - - 2 18 | Nxd4 | Is the move from g7 to f8 legal? | Yes | legality |
b2rk3/2Rn4/p3p1p1/1pBpPpNp/1P3P2/P2P4/6PP/6K1 w - - 5 35 | Bd6 | Are there any open files in this position? | Yes: c | files |
5rk1/pp4p1/4p2p/3p3Q/4q3/P7/PK2B1PP/7R b - - 1 24 | Rf2 | Does Black have any passed pawns? | Yes: d5, e6 | structure |
r3k3/ppp5/2np4/8/P1P1b3/2R2p2/1BPP1P2/3K1r2 w q - 0 25 | h1f1 | Is the White king in check? | Yes | check |
r1bq1rk1/bp3ppp/2n5/p2Q4/8/P5P1/1P2PPBP/R1B1NRK1 b - - 0 13 | Nd4 | Is the White king in check? | No | check |
rnbq1rk1/pp2bpp1/4pn1p/2pp4/3P4/2P2NP1/PP1NPPBP/R1BQR1K1 w - - 0 9 | e4 | Does Black have any passed pawns? | No | structure |
8/5kp1/5pp1/1p1p4/p2P1P2/2P1Nb2/PP3P1P/5K2 w - - 7 34 | Nc2 | Is the move from h2 to h4 legal? | Yes | legality |
1r1q1rk1/p2bpp1p/3p2pQ/3P4/2pN4/5P2/PPP3PP/2KR3R w - - 0 17 | Rhe1 | What piece is on a5? | Empty | occupancy |
2r3k1/q4pp1/1p1np2p/2n5/P7/3NPBP1/5P1P/1QR3K1 w - - 3 31 | Ne5 | Does White have any isolated pawns? | Yes: a4 | structure |
1k6/p4p2/3p4/PPpp1P2/5r2/8/5K2/1R6 w - - 1 37 | c4f4 | Is the White king in check? | Yes | check |
N1bk1b1r/p2p1ppp/8/1B6/3nPpnq/7N/PPPP2PP/R1BQ1K1R b - - 0 10 | f3 | Identify any Black knight outposts on the board. | None | outposts |
r1b2rk1/1pqnppbp/p5p1/3pP3/5PPP/1NPQB3/P1P1B3/R3K2R b KQ - 4 14 | Rd8 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
r4r2/pp2R2p/1qp4k/8/8/2n2Q1P/PPP2PP1/2K5 w - - 2 22 | Qxc3 | Is the move from b2 to f5 legal? | No | legality |
8/pp4kp/2P1Q1p1/8/5rP1/7P/P5K1/2q5 b - - 1 30 | h1g2 | What is the material balance in this position? | Black is up 5 pawns of material | material |
3q2k1/2r1b2p/pp1P2pP/3b1p2/5P2/P2PQ3/1P2N2R/2K3R1 w - - 1 30 | c6d5 | Is the White king in check? | Yes | check |
5rk1/2p3pp/p1P5/1p3p2/3P4/N1P3K1/PPB2nP1/R1B2r2 b - - 0 23 | g5 | Is the White king in check? | No | check |
2r3k1/p4ppp/1q2p3/4p1b1/1P2P3/PB5P/4QPP1/1R4K1 b - - 0 25 | Bc1 | What piece is on g1? | White King | occupancy |
r1bqk1nr/p1pp1pbp/2p3p1/4P3/8/2N1B3/PPP2PPP/R2QKB1R w KQkq - 1 9 | Bd4 | Are there any open files in this position? | No | files |
1k1r3r/pp4pp/3bQ3/qB6/8/2n4P/P1PB1PP1/R4RK1 b - - 0 1 | Qb6 | What piece is on h7? | Black Pawn | occupancy |
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