fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
1R2k2r/4qp2/1prp1n1B/4p2p/4P3/2P5/1P1N1PPP/3Q1RK1 b - - 0 22 | a8b8 | Is the Black king in check? | Yes | check |
r1k1r3/ppp1np1p/5N2/8/2BQ2bq/3P4/PPP5/5RK1 w - - 2 23 | Be6+ | Is the f-file open, semi-open, or closed? | semi-open for White | files |
2b2r1k/3q1rp1/pp4Qp/2bp3B/3NpP2/4B3/PP5P/3R2RK w - - 4 34 | f5 | Does Black have any passed pawns? | Yes: d5, e4 | structure |
2r2rk1/pb2p1B1/1p3ppQ/n3P3/3P4/5N2/P3BPP1/1q3K1R w - - 6 24 | Ne1 | What piece is on d2? | Empty | occupancy |
5b1k/p7/1p4Bp/8/4N3/7P/n5P1/7K w - - 0 39 | Be8 | Are there any open files in this position? | Yes: c, d, e, f | files |
5rk1/2q2p1p/2p2n2/p7/2BRPP2/P6P/1pQ5/5RK1 b - - 0 25 | Qb6 | What piece is on d4? | White Rook | occupancy |
rnb2rk1/p2qb1pp/4p3/1p2Pp2/2pP4/2Nn1NP1/1P2QPBP/R1B2RK1 w - - 0 16 | Ne1 | Identify any Black knight outposts on the board. | b3, d3 | outposts |
5r1k/3n1p1p/8/p1pP4/Pp3R2/1P1b4/6BP/2R4K b - - 0 33 | c4 | Identify any White knight outposts on the board. | c6 | outposts |
r2qkb1r/pb1n1ppp/4p3/2NnP3/1p1P4/3B1N2/PP3PPP/R1BQK2R b KQkq - 0 12 | Nxc5 | Identify any Black knight outposts on the board. | None | outposts |
r4r1k/1p2qppp/pQ2pb2/4N3/Pn1P4/1B4R1/1P3PPP/3R2K1 w - - 8 27 | Ng4 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
2rqk3/rp2b1pp/p1p1Q3/4P3/2B5/8/PPP3PP/R6K w - - 4 24 | Rf1 | Is the move from c2 to b6 legal? | No | legality |
r1b3r1/ppkn1p2/2p1p3/7p/4R1pN/2P3P1/PPK1B1PP/5R2 b - - 1 24 | Rg7 | Is the Black king in check? | No | check |
3rrb1k/2pq3p/2pp1p2/5N2/3QP3/1P6/P1P2KPP/R3R3 b q - 2 2 | Re5 | Is the move from c6 to g2 legal? | No | legality |
r1b1kb1r/1p1n1p1p/p7/4pP2/P3q3/B4N2/2PQB2P/R3K1R1 b Qkq - 3 18 | Nc5 | What piece is on g6? | Empty | occupancy |
2k4r/1p3pb1/p2n2pp/3p4/2nN4/2P4P/PPB2PP1/2B1R1K1 b - - 0 26 | Nb5 | Is the Black king in check? | No | check |
r2kq1r1/4bQ1p/p2p1n2/8/1p3P2/3B4/PPP3PP/2KRR3 w - - 1 20 | Qc4 | Identify any Black knight outposts on the board. | None | outposts |
1nq3k1/3n1pbp/p3p3/5N2/4P1N1/1P2QPP1/6KP/8 w - - 0 4 | Ne7+ | Are there any open files in this position? | Yes: c, d | files |
8/8/3k2Kp/8/8/8/6P1/8 b - - 7 4 | Ke5 | Is the move from d6 to c6 legal? | Yes | legality |
2r5/5kp1/7n/3pP2p/1p6/1P1N1P2/8/2N4K w - - 1 35 | g4h6 | What is the material balance in this position? | Black is up 3 pawns of material | material |
r1bq1rk1/4bppp/ppn1p3/2npP3/5P2/P1N1BN2/1PP2QPP/R3KB1R w KQ - 0 12 | b4 | Is the move from h2 to a7 legal? | No | legality |
8/8/3N1K1r/bNk1p3/P1p1P3/6P1/1P3P2/8 w - - 17 46 | h5h6 | Is the White king in check? | Yes | check |
8/8/8/2R3p1/2P2P2/1P3kPP/r7/6K1 b - - 0 35 | Ra1+ | Does White have any passed pawns? | Yes: b3, c4 | structure |
rnb1k2r/p3ppbp/2p2np1/qp1p4/3P1B1P/2N1P3/PPPQBPP1/R3K1NR w KQkq - 0 8 | a3 | Is the b-file open, semi-open, or closed? | closed | files |
r2q1rk1/3n1ppp/2p1p3/p7/PnBP3b/2N3B1/1P2QPPP/R2R2K1 w - - 10 21 | Bd6 | Does Black have any isolated pawns? | Yes: a5, c6 | structure |
5rk1/3q1ppp/Q2Pp3/2p5/6n1/2N2N2/PPP2PPP/2KR3R w - - 1 17 | Ne4 | What piece is on f7? | Black Pawn | occupancy |
1qrr2k1/p3bppp/bpn1pn2/6B1/3P4/P1N2N2/1P1Q1PPP/1B1RR1K1 w - - 10 17 | Qc2 | Are there any open files in this position? | Yes: c | files |
2R2rk1/5p2/p2pp1p1/1p1P3p/1P2P3/7Q/P4PPP/3q2K1 w - - 0 24 | a1d1 | Is the Black king in check? | No | check |
1r3k1r/p1NR3p/8/8/1p2PP1P/2p3PB/1B1R1K2/1q6 w - - 5 42 | Be6 | Is the move from f2 to g1 legal? | No | legality |
8/1p6/2p1p2N/p1Pp1kp1/8/1P4P1/P2K4/r2B4 b - - 15 54 | Ke4 | Does Black have any isolated pawns? | Yes: g5 | structure |
6k1/5pp1/4p2p/1pp1P2P/3bqBP1/P7/KP5Q/8 w - - 0 43 | Qd2 | Does White have any isolated pawns? | Yes: e5 | structure |
8/8/8/pN3k2/3P1p2/8/3K4/8 b - - 0 48 | Ke4 | Identify any White knight outposts on the board. | c5, e5 | outposts |
r3k2r/p1p2pp1/2p1b3/2bpP1Bp/8/3B1NqP/PPP1QPPn/R4RK1 w kq - 6 14 | Kh1 | What piece is on g4? | Empty | occupancy |
3r2k1/1p4p1/2q2bQp/1r2p3/p2pPPB1/6P1/PP1R2KP/3R4 w - - 0 27 | Bf5 | Are there any open files in this position? | Yes: c | files |
rnbqk1r1/4ppb1/1n1p2p1/p1pP2P1/PpP1P3/5N2/1P2BP2/RNBQK2R b KQq c3 0 14 | Kd7 | Are there any open files in this position? | Yes: h | files |
5rk1/2p2ppp/p2r4/1p1Pp3/4Pn1q/1B1P1P1b/PP1Q1P1P/R2N2RK b - - 7 21 | Bd7 | Does White have any passed pawns? | No | structure |
1r3rk1/pppq2p1/2nbbp1p/4p3/2P3P1/3P3P/PBPN1PB1/1R1QR1K1 b - - 1 16 | Rbe8 | Is the move from d6 to a3 legal? | Yes | legality |
r2q1rk1/pp1bbppp/4pn2/4N3/PnBP4/2N5/1P2QPPP/R1BR2K1 w - - 3 13 | h4 | What piece is on c4? | White Bishop | occupancy |
8/6k1/5p2/3p2p1/6R1/4q1P1/6KP/5B2 w - - 0 55 | Ra4 | Are there any open files in this position? | Yes: a, b, c, e | files |
rn1qr1k1/3nbppp/1p2p3/pPppP3/3P4/2P2N2/1P3PPP/R1BQRNK1 w - - 1 13 | Ng3 | Is the Black king in check? | No | check |
1r2r1k1/p3qpb1/3p2p1/1NpP4/8/3b1PPp/PP1N1B1P/R2QR1K1 b - - 1 22 | Qxe1+ | What is the material balance in this position? | White is up 3 pawns of material | material |
2r1r3/2pkqQpp/2p5/4P3/8/7P/P4PP1/4R1K1 w - - 1 34 | Rd1# | Are there any open files in this position? | Yes: b, d | files |
r4rk1/1p1b2p1/p2qppN1/3p3Q/1n1P4/2N2R2/PP5P/R6K w - - 2 25 | Rg1 | Is the move from h2 to h4 legal? | Yes | legality |
2rb3k/5p1r/p2p1N2/1pq1p3/4P3/1PP3R1/P5PP/R6K w - - 0 27 | Rg8# | What piece is on e5? | Black Pawn | occupancy |
r5k1/p1p2R1p/1p4nB/8/3p4/P1n3Q1/6PP/6K1 b - - 0 27 | Ne2+ | Is the move from a8 to b1 legal? | No | legality |
8/1R6/5p2/3k4/6P1/5p1P/P3K2P/8 w - - 0 40 | f4f3 | Is the White king in check? | Yes | check |
r2qr1k1/5pp1/ppbppb1p/8/4P3/2PB4/PP1NQPPP/R2R2K1 w - - 0 16 | Bxa6 | What piece is on b6? | Black Pawn | occupancy |
r1br2k1/1p2bppp/pqnppn2/6B1/4PP2/1NN5/PPP3PP/1K1RQB1R b - - 1 12 | Qc7 | What is the material balance in this position? | Equal | material |
r1bqkbnr/1pp2pp1/2np3p/pN1N4/4P3/8/PPP2PPP/R1BQKB1R b KQkq - 1 1 | Kd7 | Does Black have any isolated pawns? | No | structure |
7k/5N2/b4n1p/1p3P2/2p1P3/K1P2B1P/P2r4/6R1 b - - 0 32 | e5f7 | Is the Black king in check? | Yes | check |
8/8/8/1k3K2/2p5/8/8/1q6 w - - 0 52 | b2b1q | Is the White king in check? | Yes | check |
rnbqk2r/pp3ppp/2p5/2bnp3/2B2P2/2NP4/PPP3PP/R1BQK1NR w KQkq - 0 7 | Nf3 | What piece is on e5? | Black Pawn | occupancy |
2b2r1k/4Npbp/3p2p1/3B4/4Pp2/2q2P2/1r2Q1PP/3R1RK1 w - - 4 27 | Qc4 | Does White have any isolated pawns? | No | structure |
rnbqk2r/ppp1bppp/4pN2/6B1/3P4/8/PPP2PPP/R2QKBNR b KQkq - 0 6 | Bxf6 | Identify any White knight outposts on the board. | None | outposts |
rnb1r1k1/pp2qpbp/3p1np1/1Np5/2PPp3/BP2P3/P1QNBPPP/R4RK1 w - - 2 14 | Rae1 | What piece is on h4? | Empty | occupancy |
r2q1rk1/2p1bp1p/p3p1p1/1p4N1/3PQ2P/8/PPP2PP1/1K1R3R w - - 0 17 | d5 | Are there any open files in this position? | No | files |
1r4k1/5p1p/4pQp1/r2pP3/3P1P1P/P7/KPn3P1/1N1R3R b - - 6 37 | a1a2 | What is the material balance in this position? | White is up 11 pawns of material | material |
1rbq1rk1/1p4pp/pN1p1b2/P2Pnp2/8/2P2B2/1P1B2PP/R2Q1RK1 b - - 0 19 | g5 | Identify any White knight outposts on the board. | d4 | outposts |
2r1r1k1/1pQ2ppp/3p1b2/p2P4/q3R3/5N2/1P3PPP/4R1K1 b - - 1 5 | Qb5 | Is the a-file open, semi-open, or closed? | semi-open for White | files |
2rk1b1r/1bqn1ppp/pp1p1n2/3P4/2PN4/1P4P1/PB2QPBP/R4RK1 b - - 2 14 | Be7 | Are there any open files in this position? | Yes: e | files |
1r4k1/3b1pPp/p3pP2/2n1P3/1r1p2P1/1PN4R/2P5/1K1R1B2 b - - 0 25 | Bc6 | What piece is on a6? | Black Pawn | occupancy |
r1b2r2/1p1np1bk/p7/q3Np1p/3P1QpP/1B2P1B1/PP3PP1/R3K2R w KQ - 4 19 | d8a5 | Is the Black king in check? | No | check |
1q1r4/6pp/6k1/4P1b1/8/2p2Q2/2P3PP/3R3K w - - 9 38 | Qc6+ | Is the move from h2 to h6 legal? | No | legality |
2bq1r1k/1pp2nbp/3p1np1/3Pp3/1PP1PP2/1NN2P2/3BBR1P/2Q3K1 b - - 0 22 | Nh5 | Does White have any passed pawns? | No | structure |
r1b3k1/pp2b1pp/P1p3q1/2BpP3/8/2Q5/1PPN2PP/5RK1 b - - 2 19 | Bh3 | Is the Black king in check? | No | check |
rnb2rk1/pp4pp/4p1p1/2qpP3/8/P3BN2/2P2PPP/R2Q1RK1 b - - 1 15 | g5e3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq - 0 3 | Nd2 | Is the move from g1 to h3 legal? | Yes | legality |
3k4/7R/8/3K4/8/6B1/8/4r3 b - - 43 84 | Rc1 | Does Black have any isolated pawns? | No | structure |
r2qk2r/1p1b3p/n5B1/p1bp3Q/3N4/P3B3/1P4PP/R4RK1 b kq - 0 20 | d3g6 | Is the Black king in check? | Yes | check |
r1bq1rk1/3nbppp/1pp1pn2/p1Pp4/1P1P1B2/P1N1PN1P/5PP1/R2QKB1R b KQ - 0 10 | Ba6 | What piece is on c6? | Black Pawn | occupancy |
r1rq1bk1/Bnnb1p1p/3p2p1/1p1Pp3/1Pp1P3/2P2NNP/R1BQ1PP1/4R1K1 w - - 4 26 | Rea1 | What is the material balance in this position? | Equal | material |
8/8/k1q1p1Q1/p3Pp2/PbP2Pp1/1P1p4/K7/2R5 b - - 1 123 | Bd2 | Is the move from a6 to a7 legal? | Yes | legality |
rn4k1/ppp2rbp/4Q1p1/4p3/1q2N3/5N1P/PPPB1PP1/R3K2R b KQ - 0 13 | Qxe4+ | Is the move from a7 to a6 legal? | Yes | legality |
2k4r/p5p1/2ppq1p1/np6/1P1PP3/2p1Q3/P1P3P1/1K1R4 w - - 1 23 | e5e6 | What is the material balance in this position? | Black is up 4 pawns of material | material |
r1bqk2r/ppp2ppp/2p2n2/2b5/2P1p3/1P6/PB1PPPPP/RN1QKB1R w KQkq - 0 7 | e3 | What piece is on d3? | Empty | occupancy |
r1bqkb1r/pppn2pp/2n1pp2/3pP1N1/3P4/3B4/PPPN1PPP/R1BQK2R b KQkq - 1 7 | Ndxe5 | Identify any Black knight outposts on the board. | None | outposts |
2rk4/5R2/n2B4/pb1p3p/7P/4r1n1/P2K4/8 b - - 4 36 | c2d2 | Identify any Black knight outposts on the board. | c4, e4 | outposts |
r1bqk2r/pp1p1ppp/3b1n2/8/1n6/2N2N2/PP3PPP/R1BQKB1R w KQkq - 0 10 | Qxd6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
1n1r2k1/2R3pp/4p3/pp2Np2/3P4/P3P1P1/1P3P1P/5RK1 w - - 0 23 | a7a5 | What is the material balance in this position? | White is up 6 pawns of material | material |
1k1r3r/1pqnb1p1/p1p1p1p1/3n1pP1/N2P1P2/4P1QP/P2B2B1/1RR3K1 b - - 3 22 | Ka7 | Are there any open files in this position? | No | files |
r1b2r1k/ppp2ppB/3p4/8/1nP5/1q2P3/P2K1PPP/3R3R w - - 0 19 | a3b3 | Identify any Black knight outposts on the board. | c5 | outposts |
5rk1/p4p1r/1n1q2p1/2p3Bp/3b1R1P/1B3QP1/PP3P2/2R3K1 w - - 6 26 | Bh6 | Are there any open files in this position? | Yes: d, e | files |
rnb1kq1r/1p3p1p/pn2p1p1/3pP3/5N2/2NB2Q1/PPP2PP1/2KR3R w kq - 2 15 | Be4 | Is the move from d3 to e2 legal? | Yes | legality |
1q5r/1b2P1b1/p5kp/1p1p1p2/8/4QP2/PP3BPP/4R1K1 b - - 3 3 | Qe8 | Is the move from b8 to f3 legal? | No | legality |
r3r1k1/1p3p2/p3bp2/q1p4p/4PQ2/1P4PP/P5B1/R4RK1 w - - 0 25 | e5 | Does Black have any isolated pawns? | Yes: f6, f7, h5 | structure |
r1b1r1k1/pp3ppp/2n1p3/2b2q2/2P1N3/P2B1N2/1PQ2pPP/R4RK1 w - - 0 15 | Kh1 | Is the White king in check? | Yes | check |
5bkr/4pq1r/bp1n3p/p1pPBPp1/P1P1P1PP/1P3B1R/5K1Q/7R w - - 1 63 | hxg5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
rnb1k2r/3qbppp/p2ppn2/8/1p1NP3/1B2BQ2/PPP1NPPP/R3K2R w KQkq - 2 11 | O-O | Identify any White knight outposts on the board. | None | outposts |
8/2pk4/1p4p1/p2P1p1p/2r2r2/4RK2/P4RPP/8 w - - 4 31 | e4f4 | Is the White king in check? | Yes | check |
rnbq1rk1/ppp3bp/3p1np1/4Pp2/1PP5/5NP1/PB2PPBP/RN1QK2R b KQ - 0 8 | Nfd7 | What piece is on g8? | Black King | occupancy |
4r1k1/1pp2ppp/1b4r1/p2P4/6n1/1P3NPb/P3B2P/R2QR2K w - - 2 23 | Qb1 | Are there any open files in this position? | Yes: e | files |
r4rk1/1b3ppp/1q3b2/p3p3/2Pp4/8/PPB1QPPP/RN1R2K1 w - - 3 16 | Nd2 | What piece is on f6? | Black Bishop | occupancy |
8/8/8/5p2/1N2k3/p7/K7/8 b - - 0 63 | f4 | What piece is on e2? | Empty | occupancy |
r2qkbnr/ppp1nppp/8/3p4/3P4/2N1PQ2/PP3PPP/R1B1KB1R w KQkq - 0 8 | Bd3 | Identify any White knight outposts on the board. | None | outposts |
1n1r2rk/pq3p1p/1p2pP2/2p5/2P3Q1/6P1/PP3P1P/3R2K1 w - - 0 26 | Rxd8 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r3k2r/pp2bppp/2bppn2/q5B1/3QP3/2N2N2/PPP2PPP/2KRR3 w kq - 4 11 | Nd5 | Is the move from h2 to h8 legal? | No | legality |
5k2/1p3Np1/4n3/p7/6K1/4P1P1/P2P3P/8 b - - 0 37 | h5g4 | Identify any White knight outposts on the board. | d4 | outposts |
r1bqr1k1/1p3pp1/p1nb1n1p/3p4/3N4/2P1B2P/PP1N1PP1/R2QRBK1 w - - 0 14 | Rc1 | Is the White king in check? | No | check |
2r2rk1/1p3pp1/1q2b2p/p1bpPn2/8/P2B1N2/1PRBQPPP/5RK1 b - - 7 19 | Nd4 | What is the material balance in this position? | Equal | material |
r7/3n1p1p/1p1pk3/p2Np1P1/RPr1P2p/5P2/1PP1K3/R7 w - - 3 27 | c3 | Are there any open files in this position? | No | files |
8/5p1k/2R1q2p/1P4p1/4p3/P5Q1/1B3PK1/3r4 b - - 2 37 | Qf5 | Does White have any passed pawns? | Yes: a3, b5 | structure |
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