fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
r1b2rk1/ppqnbppp/3pp3/4P3/3P1B2/1QPB1N2/P4PPP/R3K2R w KQ - 7 12 | O-O | Is the move from a2 to a3 legal? | Yes | legality |
rnq1k2r/pb1p1pp1/1p2pb1p/8/Q1P5/2N2NP1/PP2PPBP/R4RK1 w kq - 0 12 | Nb5 | Identify any Black knight outposts on the board. | None | outposts |
rq1b2rk/1p5p/p2p1pp1/3NpP1b/4P3/2B4Q/PPP4P/2K2BR1 w - - 1 23 | Bc4 | Is the move from d5 to b2 legal? | No | legality |
r2qk1r1/pb1n1p2/5n1p/1NbP4/2p3pP/6B1/PP2BPP1/R2Q1RK1 w q - 1 17 | Bxc4 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
3r1bk1/3r2p1/1pq1b1Qp/p2p1p2/5P2/P1BRP1PP/1P1R2BK/8 w - - 2 33 | Be5 | What piece is on f7? | Empty | occupancy |
3q3k/2p4p/p2pB3/7P/1n1PPQP1/r1p5/8/1K1R2R1 b - - 0 26 | Nd3 | What piece is on a5? | Empty | occupancy |
r1bqk2r/pppp1ppp/2n5/2b1P3/2Bpn3/5N2/PPP2PPP/RNBQ1RK1 w kq - 1 7 | Bd5 | Is the move from c2 to c3 legal? | Yes | legality |
5k2/8/1R3p1p/4b1p1/3p4/6P1/3r1PKP/4R3 b - - 1 35 | Kg7 | Are there any open files in this position? | Yes: a, b, c, e | files |
r3r1k1/1p3p1p/2pQ2pq/8/N1P1Pn2/5P1P/PPBR4/5R1K b - - 0 23 | Re6 | What piece is on e4? | White Pawn | occupancy |
2rr2k1/1b1nR1p1/8/p2p2Q1/Pp6/1Bq5/5PPP/4R1K1 w - - 1 28 | h3 | Does White have any isolated pawns? | Yes: a4 | structure |
k7/R7/5p1p/8/6P1/2K4P/8/8 b - - 0 43 | g7a7 | Is the Black king in check? | Yes | check |
r4rk1/4npb1/bqn1p1pp/p2pP3/1ppP1PP1/2P1NB1N/PP1B3P/R2Q1RK1 b - - 1 17 | Rad8 | Identify any White knight outposts on the board. | None | outposts |
rn3b2/p1pk4/5P1p/8/7P/5p2/PPPP2b1/RNB1K1R1 b Q - 0 17 | Bc5 | Does Black have any isolated pawns? | Yes: a7, c7, f3, h6 | structure |
r1bq1rk1/3nbppp/p2pp3/1p4P1/3BP2P/2N2P2/PPPQ4/2KR1B1R b - - 0 13 | b4 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
r1bqkb1r/pppp1ppp/5n2/4p3/2Pn4/2N2NP1/PP1PPP1P/R1BQKB1R w KQkq - 1 5 | Nxe5 | Identify any White knight outposts on the board. | None | outposts |
7R/4kp2/2R4p/6p1/3Pp3/rb2N1P1/5P1P/6K1 b - - 0 31 | c1c6 | Identify any Black knight outposts on the board. | d3 | outposts |
8/pp3Ppp/P1p2k2/3p4/8/8/1PPr2PP/6K1 b - - 0 27 | Rd1+ | What piece is on c2? | White Pawn | occupancy |
r2r2k1/pp3p1p/4p1p1/3p4/8/3P2P1/5K1P/2R5 b - - 0 32 | Rac8 | What piece is on d7? | Empty | occupancy |
r1k4r/6pp/3p1n2/8/4p1q1/1Q6/PPPP2PP/R1B1K2R w KQ - 0 23 | O-O | Is the move from c1 to b3 legal? | No | legality |
r1b2rk1/ppp2p1p/2n3p1/4b1B1/2P1N3/8/PP2BPPP/2KRR3 b - - 3 13 | Bf5 | What piece is on d1? | White Rook | occupancy |
r2q1rk1/pb1n1pp1/1p1ppn1p/2p5/2PP3B/P1NBP3/1P3PPP/R2Q1RK1 b - - 1 15 | Qc7 | Are there any open files in this position? | No | files |
5k2/3n1pp1/p1n4p/1pP1p3/1P2P3/P7/1B3NPP/6K1 w - - 0 33 | Kf1 | What is the material balance in this position? | Equal | material |
2brnrk1/1p6/p5B1/8/3p4/8/PPP1N2P/2KRR3 b - - 0 27 | Rf2 | Is the White king in check? | No | check |
r4r1k/pp3pp1/2n3n1/3pP1q1/8/3Q3R/P1BN2PP/B6K b - - 4 21 | f3h3 | Is the Black king in check? | Yes | check |
8/4Nppk/p1pr3p/3b4/nP2p3/P5P1/3R1P1P/4R1K1 w - - 0 34 | Nxc6 | Is the White king in check? | No | check |
1rb2rk1/4ppbp/pn1p2p1/8/4P3/2p2P2/PPBQN1PP/1K5R w - - 0 21 | Qd3 | Are there any open files in this position? | No | files |
5rk1/4b1pp/4P3/1q2np2/PP2p3/8/N5PP/2R3BK w - - 0 31 | axb5 | Does White have any isolated pawns? | Yes: e6 | structure |
1kr5/p2qb1p1/P1Rp3p/3Pp1pP/1BQpP3/5P2/K2P4/8 w - - 3 37 | Ba5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r7/3R4/P7/1K6/6p1/6k1/2P3P1/8 w - - 0 39 | a7 | Is the Black king in check? | No | check |
2b5/q4kb1/2pQ4/2N1p1R1/8/1P2nP2/P1P5/1K6 w - - 12 42 | Rxg7+ | Identify any White knight outposts on the board. | a4, c4, e4, g4 | outposts |
8/8/5PK1/7p/7P/1k6/8/6q1 w - - 1 54 | c1g1 | Is the White king in check? | Yes | check |
r1q1r1k1/1ppb1pb1/3p1np1/2nN3p/p1PNP3/4B1PP/PPQ2PBK/R2R4 w - - 2 18 | Nb5 | What piece is on h8? | Empty | occupancy |
6k1/rp1r1ppp/q1p2n2/Q7/pPN3b1/4P1P1/P4PBP/R1R3K1 w - - 2 25 | Qc5 | Identify any White knight outposts on the board. | None | outposts |
8/nrrpk3/Np1R1p2/p5p1/4P2p/PP3P1P/6P1/3R1K2 b - - 2 46 | Rc6 | What piece is on f6? | Black Pawn | occupancy |
1n3b1r/4kpp1/2b1p2p/1P1n4/8/1P1B1N2/2Q2PPP/R3R1K1 w - - 3 22 | c3d5 | What is the material balance in this position? | White is up 9 pawns of material | material |
r5r1/pQ5p/2q5/2k1p3/4P3/2PP4/P1P3PP/6K1 w - - 0 25 | Qb4# | What is the material balance in this position? | Black is up 6 pawns of material | material |
rnbq1rk1/pp2bppp/4p3/2ppP3/3P3P/2NB1N2/PPP2PP1/R2QK2R b KQ - 0 9 | c4 | What piece is on b1? | Empty | occupancy |
r2qk2r/pbpp1p1p/1pn1pbp1/8/2BP4/2P2PQ1/PP2N1PP/RN2K2R w KQkq - 3 11 | b8c6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r1b1k2r/1p3ppp/p1n1Pn2/2bp4/8/q2B1NB1/P1P2PPP/1R1QR1K1 w kq - 1 15 | exf7+ | Is the move from g1 to h1 legal? | Yes | legality |
2kr1b1r/p4p1p/1pp1b3/2pNPp2/2Pn1P2/4B3/PP3KPP/3R1B1R w - - 0 20 | Nf6 | Does White have any isolated pawns? | No | structure |
rn1qkb1r/1b3ppp/pp1ppn2/8/2PNP3/2N1BP2/PP4PP/R2QKB1R w KQkq - 1 9 | g4 | Does White have any passed pawns? | No | structure |
8/8/4kp2/N3p2p/3Pn3/4PpPP/1r3P2/5RK1 b - - 3 47 | Kd5 | Are there any open files in this position? | Yes: a, b, c | files |
rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq - 0 6 | O-O | Identify any White knight outposts on the board. | None | outposts |
5Q2/p1pQ2qk/np5p/3p3P/3Pp3/4P3/PPP5/RNB1K1R1 w - - 3 27 | f6g7 | What is the material balance in this position? | White is up 22 pawns of material | material |
3r4/pb3pkp/1p2p1p1/1B2b2P/Pq1nP3/3Q4/4NPP1/2RR2K1 w - - 1 22 | Kf1 | Does Black have any isolated pawns? | No | structure |
r2qnrk1/pb1nbppp/1pp1p3/3PP3/3P4/5NP1/PPQN1PBP/R1B2RK1 b - - 0 11 | cxd5 | Is the White king in check? | No | check |
3r1k2/5ppQ/pp2n2p/1b1pRB2/1P1P1q2/P5NP/5PP1/6K1 b - - 10 29 | Bd7 | Does White have any isolated pawns? | Yes: d4 | structure |
1Q6/8/4k3/p3p1P1/8/1P6/2p5/6K1 w - - 0 50 | Qc8+ | Are there any open files in this position? | Yes: d, f, h | files |
2r4r/1p2kp1p/pq1p1p2/4p3/2b1P3/1PN1P3/P1PQ2PP/R4RK1 b - - 0 3 | Be6 | Are there any open files in this position? | No | files |
8/8/4k3/7R/5K1P/6P1/8/8 b - - 4 45 | f3f4 | What is the material balance in this position? | White is up 7 pawns of material | material |
rnbq1r1k/pppp1N1p/3n1Pp1/8/2B2Q2/8/PB3PPP/R4K1R b - - 0 1 | Nxf7 | What piece is on b7? | Black Pawn | occupancy |
r1b2rk1/ppp2p2/2np3p/2bB4/4PB2/8/PqPQ1PPP/R4K1R b - - 1 13 | e1f1 | Identify any Black knight outposts on the board. | c5 | outposts |
rnbq1rk1/ppp3pp/5n2/2bPp3/8/2N5/PPPB1PPP/R2QKBNR w KQ - 3 8 | Be3 | What piece is on d3? | Empty | occupancy |
r3k1nr/pppb2pp/5p2/1B1P4/8/2P5/P1P2PPP/R1B1K2R w KQkq - 2 13 | c8d7 | What is the material balance in this position? | White is up 1 pawn of material | material |
3rr2k/p1pqbp1p/2pp4/5N2/3QP3/1P6/P1P2KPP/R3R3 b - - 3 5 | f6 | Identify any White knight outposts on the board. | a4, f5 | outposts |
r1k2b2/1p2r3/p1b3Qp/q7/2p1P3/2N5/PPP2PPP/R2R2K1 w - - 5 21 | Rd5 | Does White have any passed pawns? | Yes: e4, f2 | structure |
r3r1k1/p4pp1/1bp4p/6Pn/3P2R1/2NQPq1P/PP3B2/3R1K2 b - - 1 24 | Qxh3+ | Identify any Black knight outposts on the board. | None | outposts |
6k1/1p4p1/pP3r1p/P1Pp1p2/3PrPn1/3R1P2/3Q2Bq/R4K2 w - - 0 33 | c6 | Are there any open files in this position? | Yes: e | files |
4k3/p2n4/1n2pr1p/2b2N2/1p1N4/1B6/PP3PKP/4R3 b - - 0 29 | e5 | Identify any Black knight outposts on the board. | d5, f5 | outposts |
r2q1rk1/pppnBppp/2n1p3/3pNb2/3P4/P1N4P/1PP1PPP1/R2QKB1R b KQ - 0 9 | g5e7 | What is the material balance in this position? | White is up 3 pawns of material | material |
r3k2r/ppp2Npp/2n5/3Bp3/4K1bq/8/PPPP3P/RNB1Q2R b kq - 1 11 | Bf5+ | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
8/5pk1/3r2p1/1R1B3p/3K4/6P1/7P/8 w - - 1 45 | Rb3 | Does Black have any passed pawns? | No | structure |
8/3N2k1/5p2/3p1P2/1p1b2K1/1P6/2P5/8 w - - 0 81 | Nb8 | Identify any White knight outposts on the board. | None | outposts |
rnbq1rk1/ppp1bppp/4pn2/4N3/2pP4/6P1/PP2PPBP/RNBQ1RK1 b - - 1 7 | Nc6 | What piece is on a2? | White Pawn | occupancy |
r7/p4n2/1p2pk2/3r4/1Q6/P4P2/5P1P/R5K1 w - - 2 34 | Re1 | Identify any Black knight outposts on the board. | a5, c5, d5, f5 | outposts |
8/8/3B2p1/2K2k2/2P4p/5PbP/8/8 w - - 5 50 | Kd5 | Does White have any passed pawns? | Yes: c4 | structure |
r3kb2/8/ppp1pQp1/4P3/7B/8/2P2P1P/3q1K2 w q - 0 31 | g4d1 | Is the White king in check? | Yes | check |
3r2k1/pp3pp1/2np3p/3p3B/3Pq3/2PbNPQP/P5P1/4R1K1 b - - 0 26 | Qe7 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r2q1rk1/1pp1bppb/2n1pn1p/p2p4/2PP4/PP3NP1/1B1NPPBP/R2QR1K1 b - - 0 12 | Nb8 | Is the move from e6 to a8 legal? | No | legality |
8/8/4k2p/p3n1p1/1p1b2P1/1P1p2BK/r6P/3RR3 b - - 1 38 | Kf6 | Identify any White knight outposts on the board. | None | outposts |
rn1bR1k1/3b1ppp/p2p4/2pP4/NpP5/PP1B1N2/5PPP/R5K1 b - - 0 19 | e1e8 | Is the Black king in check? | Yes | check |
5rbk/1r2qn2/p5pp/2pPp3/2N1P3/P1Q3P1/6BP/2R2RK1 b - - 4 31 | Re8 | Is the move from e7 to c8 legal? | No | legality |
5r2/p5p1/2Pk3p/4p3/P2b2P1/8/3R1PB1/5K2 b - - 2 42 | Rf4 | Identify any Black knight outposts on the board. | d4 | outposts |
rnbq1rk1/pp1nppbp/6p1/2pP4/8/2N1BN2/PPP2PPP/R2QKB1R b KQ - 0 9 | Qb6 | Are there any open files in this position? | No | files |
1r1qkb1Q/1bpn1p1p/p3p3/6B1/3P4/5N2/P1n1BPPP/5RK1 b - - 1 15 | Bxf3 | Are there any open files in this position? | Yes: b | files |
8/8/7k/p1p2P2/1PK1p1pP/1P4P1/1P6/8 b - - 0 53 | axb4 | What piece is on e8? | Empty | occupancy |
4k3/1Q6/p3p3/4p3/6p1/1pP5/PP1K2PP/5q2 b - - 1 44 | Qf4+ | Does Black have any passed pawns? | Yes: e5, e6 | structure |
r4bnr/pp3p1p/2k3p1/1N2p3/4P3/5Q1P/PPP2KPq/3R1B2 w - - 2 20 | Qc3+ | What piece is on h2? | Black Queen | occupancy |
r1b1k2r/pp1n1pb1/2p2qpp/4p2P/2QP4/2N1PN2/PP3PP1/2KR1B1R b kq - 0 12 | b5 | Are there any open files in this position? | No | files |
5k2/q5b1/b1p1Q3/3np3/4N3/1P3P2/P1P5/1K4R1 w - - 6 39 | Rg5 | Is the move from e6 to f7 legal? | Yes | legality |
3r1r1k/q7/n2NpP2/p5Q1/pn2b3/6P1/1P3P1P/2RR2K1 w - - 3 28 | f7 | Is the White king in check? | No | check |
8/3k4/1p2n2p/pP1p2pP/P2P1pP1/B2K1P2/8/8 b - - 4 40 | Kc7 | Does White have any isolated pawns? | Yes: d4 | structure |
r7/p2k2p1/1pbqn2p/1B3Q2/8/8/PPP2PPP/4R2K w - - 0 28 | Rxe6 | Is the move from c2 to d5 legal? | No | legality |
8/8/4p3/p3Pk1p/1bP2Pp1/3Kp3/7P/5R2 b - - 0 41 | b3c4 | What is the material balance in this position? | White is up 1 pawn of material | material |
1rb1kbnr/Bp1p1ppp/3P1q2/1N6/5n2/8/PPP3PP/R2QKB1R b KQk - 0 13 | Nxg2+ | Is the a-file open, semi-open, or closed? | semi-open for Black | files |
1R6/pP1knp2/P3p1p1/3p3p/2r2P2/2PK2PP/8/8 w - - 1 4 | Ra8 | What piece is on h2? | Empty | occupancy |
r2r4/1p4bk/2p1b1pp/p3Pp2/P4P2/2Bn2PP/1P1N2K1/R2R1B2 b - - 2 28 | Nc5 | Identify any Black knight outposts on the board. | None | outposts |
r1b3k1/1p2p1q1/pn3r2/5p2/3p2PQ/2NB4/PPP5/R3K2R w KQ - 1 25 | Ne2 | Identify any Black knight outposts on the board. | e3, e4, g4 | outposts |
r5kr/pp1q2bp/3P1pn1/2p5/8/1PN1P1P1/PBQP3P/5RK1 w - - 3 22 | Ne4 | What is the material balance in this position? | Black is up 3 pawns of material | material |
6b1/ppp5/6k1/3p1pN1/5P2/2P4P/Pn6/RN4K1 w - - 1 27 | e6g8 | What is the material balance in this position? | White is up 4 pawns of material | material |
rnb2rk1/p4pb1/1qp2n1p/3P2p1/B4p2/2PP1N2/PP1N2PP/R1BQ1R1K b - - 0 12 | cxd5 | Does White have any isolated pawns? | No | structure |
r1bq1rk1/1pp2pQn/p3p3/4B1bp/2BPP1pP/2N3P1/PP3P2/R3K2R b KQ - 6 16 | h6g7 | Is the White king in check? | No | check |
2k1r3/1pp3pp/p2b3B/8/3P2P1/3R1N1P/PP3P2/6K1 b - - 0 27 | e3h6 | What is the material balance in this position? | White is up 4 pawns of material | material |
r1bqkb1r/pp3ppp/2n2n2/3p4/3N4/1P2P3/PB1N1PPP/R2QKB1R b KQkq - 0 9 | Bd6 | What piece is on a5? | Empty | occupancy |
2r5/2r1qk1p/3Rb3/1Bp2p2/4pQ2/2P5/1P3P1P/3R2K1 w - - 0 35 | Kh1 | Does White have any isolated pawns? | Yes: f2, h2 | structure |
8/5r2/kn3Pq1/pp1pP2r/b1pP4/P1P1Q1B1/R1P4p/5RK1 w - - 0 44 | Kh1 | Does Black have any isolated pawns? | Yes: h2 | structure |
5rk1/5p1p/R2N2p1/5pQ1/3q4/3n3N/2n3KP/R7 b - - 0 34 | g1g2 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r2k1r/1q1pbpp1/p3p3/1p2P3/4NPn1/1P3Q1P/PBP4P/2R2R1K b - - 0 20 | Nh6 | Does Black have any passed pawns? | No | structure |
r1b2rk1/p4ppp/1qp3n1/3p4/1P1P4/N1PN4/5PPP/R2Q1RK1 b - - 2 15 | Re8 | Is the move from g8 to f3 legal? | No | legality |
2k4r/1pp5/p4n2/7p/3R1pp1/2P1qP2/PP4PP/3Q1RK1 w - - 2 27 | e5e3 | Is the Black king in check? | No | check |
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