fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
2k1r2r/1p3pb1/p1nn2pp/3p4/3N4/2PBB2P/PP3PP1/3RR1K1 b - - 10 23 | Ne5 | What piece is on d5? | Black Pawn | occupancy |
5k2/Q5p1/b4r2/3BRP2/1p6/1P4K1/2q5/8 b - - 1 43 | Qd3+ | What is the material balance in this position? | Equal | material |
1k1r1b1r/2p2p2/Q3b2p/1N1p2q1/3P2pN/1P4P1/PP3PP1/K6R b - - 0 24 | Bd6 | Is the a-file open, semi-open, or closed? | semi-open for Black | files |
rn2k2r/pp1q1ppp/1n6/4PNB1/1bP5/2N5/PP4PP/R2QK2R b KQkq - 0 13 | Qxd1+ | Are there any open files in this position? | Yes: d | files |
r1bq1rk1/4bppp/p1p1pn2/4p1B1/5P2/2N5/PPPQ2PP/2KR1B1R w - - 0 12 | fxe5 | Does Black have any isolated pawns? | Yes: a6, c6 | structure |
8/1Kbk4/3P3p/2P1p1pP/4P1P1/8/8/8 b - - 0 68 | Bd8 | Is the move from c7 to b6 legal? | Yes | legality |
5rk1/pp3rpp/2p1Q3/3pP3/1q6/3P4/2PK3P/5R2 w - - 1 33 | c5b4 | What is the material balance in this position? | Black is up 7 pawns of material | material |
2r1r1k1/1b3p2/ppp1qnpp/4p2n/PPP1P3/1N2bP2/2Q2BPP/R3RBK1 w - - 0 23 | Bxe3 | Is the d-file open, semi-open, or closed? | open | files |
4r3/3n4/p1k2pbp/2pP4/2P5/2K2P2/PP5r/3R4 b - - 0 30 | d4d5 | Is the Black king in check? | Yes | check |
7R/2P2pk1/p3p3/4n2p/7P/5R2/BKP1n3/6q1 w - - 0 47 | Rg3+ | What piece is on e5? | Black Knight | occupancy |
8/p7/8/k5K1/4q3/5q2/8/8 b - - 5 63 | f6g5 | What is the material balance in this position? | Black is up 19 pawns of material | material |
4k2r/p2r1ppp/2p1p3/5P2/2Nbn3/1P6/PB4PP/2R2RK1 w - - 0 25 | c5d4 | Is the White king in check? | Yes | check |
8/7p/1p1k2p1/p2r1p2/5P2/P5PP/1PR3K1/8 w - - 0 37 | h4 | Is the White king in check? | No | check |
rn1q2k1/p1ppp1br/1p6/8/3PQ3/8/PPP2P1P/RNB1K1R1 b Q - 0 14 | d5 | Is the move from h7 to h6 legal? | Yes | legality |
r2q1bkr/ppp3p1/2n4p/3pp3/6b1/3P1N1N/PPP2PPP/R1BQK2R w KQ - 2 10 | Qd2 | Is the f-file open, semi-open, or closed? | semi-open for Black | files |
r4qk1/5rp1/2p4p/p1NpPb2/PP6/R6P/5PP1/2BQ2K1 w - - 0 23 | e6 | Identify any Black knight outposts on the board. | None | outposts |
r1b1k2r/pp2qp1p/2pp2p1/2n1b3/8/1PP3P1/P2QPPBP/RNBR2K1 w kq - 2 13 | e4 | Identify any Black knight outposts on the board. | None | outposts |
3q1rk1/pp1bppbp/3p1np1/8/2rNP1P1/2N1BP2/PPPQ4/2KR3R w - - 1 16 | Nde2 | What is the material balance in this position? | Black is up 1 pawn of material | material |
k5r1/p3Rp2/5P2/2p5/1p1q1P2/1P3P1K/P3Q3/8 b - - 6 41 | Rh8+ | Is the move from d4 to h8 legal? | No | legality |
r1b1kbnr/pppp1ppp/2n5/4P3/5B2/2Q2N2/PqP1PPPP/RN2KB1R b KQkq - 1 6 | Bb4 | Are there any open files in this position? | No | files |
2kr1bnr/ppp1pppp/2n5/3q3b/8/5N1P/PPPPBPP1/RNBQ1RK1 w - - 1 7 | d4 | Does Black have any isolated pawns? | No | structure |
1r6/8/2p2k2/p1Pp2pp/P2b1p2/3N1P1P/1PK3P1/1R6 w - - 0 36 | b4 | What piece is on g2? | White Pawn | occupancy |
r4rk1/pp4pp/n4p2/4B3/1bQP4/2N5/PP3q1P/2KR2R1 b - - 1 20 | d3c4 | Is the White king in check? | No | check |
r2q1rnk/p3np1p/1p1p2p1/2pPp3/2P1P2N/2PB1PPb/P6P/1RBQR1K1 w - - 0 16 | Rb2 | Does White have any isolated pawns? | Yes: a2 | structure |
r3qr1k/p2n2p1/Pp1P1p1p/1Pp1pQ1P/2P5/2B5/5PP1/R3R1K1 w - - 2 35 | Rad1 | Is the move from f2 to f8 legal? | No | legality |
r2q1rk1/1bpnbppp/p2p1n2/1p2p3/4P3/PBPP1N2/1P2NPPP/R1BQ1RK1 w - - 1 12 | Ng3 | What piece is on d4? | Empty | occupancy |
8/p7/1pBk4/1P1p4/3P4/r3N3/4K3/8 b - - 34 72 | Ra4 | What piece is on f6? | Empty | occupancy |
r6r/p3k1p1/2p1p1p1/1pb1Pp2/5PPP/1P2K3/P1P1B3/7R w - - 1 23 | b4c5 | Is the White king in check? | Yes | check |
8/8/8/6P1/8/3bk1r1/4R3/4K3 b - - 4 58 | Bxe2 | Are there any open files in this position? | Yes: a, b, c, d, e, f, h | files |
r2qrbk1/pp1b1pp1/2pp1nnp/8/P2NP3/2N3BP/1PPQ1PP1/R3RBK1 w - - 0 15 | Rad1 | Does White have any isolated pawns? | No | structure |
2Q5/1pq2ppk/3p3p/p2P3P/P3r3/1P2P1P1/5P1K/8 w - - 0 50 | Qf5+ | Identify any White knight outposts on the board. | d4 | outposts |
8/8/2pk1PB1/p7/Pp4b1/6P1/r2p4/2K5 w - - 0 55 | d3d2 | Is the White king in check? | Yes | check |
r2q1r2/ppn2kpp/2n1p1b1/3pPp2/3P1P2/2PB3P/3NN1P1/R2Q1RK1 w - - 2 16 | Nf3 | Are there any open files in this position? | No | files |
r3r1k1/pn1b2pp/2p2q2/3p4/3Np3/QP6/P1PN1PPP/R3R1K1 w - - 2 20 | c3 | What piece is on d3? | Empty | occupancy |
r4rk1/p1p2p1p/1p4p1/1Q6/7b/3B1qBb/PPPKN2P/R6R b - - 1 19 | a6 | What piece is on h2? | White Pawn | occupancy |
7R/r7/8/8/8/8/6p1/4K1k1 w - - 1 72 | Re8 | Are there any open files in this position? | Yes: a, b, c, d, e, f, h | files |
r2qk2r/pp1nbppp/2p1pnb1/3P4/3P3N/P3PPP1/1P1N3P/R1BQKB1R b KQkq - 0 10 | cxd5 | Does Black have any isolated pawns? | No | structure |
2r2qk1/7p/1pNRp1p1/1Pn1Np2/p1P1nPP1/P3Q2P/2K5/6R1 b - - 0 34 | Nxd6 | What is the material balance in this position? | White is up 5 pawns of material | material |
r1b1kb1r/pp2pppp/2n2n2/q2p4/N2P4/5N2/PP1BPPPP/R2QKB1R b KQkq - 9 8 | Qd8 | Is the move from c8 to h3 legal? | Yes | legality |
r2qk2r/3nbppp/p2p1n2/3Pp3/Pp4P1/1N2BP2/1PPQ3P/R3KB1R b KQkq - 0 13 | h6 | Does Black have any isolated pawns? | No | structure |
7k/pp5p/8/3Pbp2/8/6KP/P2B1P2/8 w - - 2 35 | Bf4 | What is the material balance in this position? | Equal | material |
rn1qkb1r/pbpppppp/1p3n2/6B1/3P4/5N2/PPPNPPPP/R2QKB1R b KQkq - 3 4 | e6 | Does White have any passed pawns? | No | structure |
5qk1/p1Q3pp/2b5/3p4/3B1r2/P7/2P3PP/4R1K1 b - - 0 27 | Bb5 | What piece is on c2? | White Pawn | occupancy |
r1bqk1nr/pp1pppbp/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQR1K1 b kq - 3 5 | e5 | Is the move from c6 to b4 legal? | Yes | legality |
2b3k1/1pp3pp/1p1p4/6B1/8/2NP2rP/PPP2K2/R7 b - - 2 26 | Rxg5 | Identify any White knight outposts on the board. | None | outposts |
r2q1rk1/5ppp/4p3/pBnb4/Pp2n3/4PN2/1P1BQPPP/2R2RK1 w - - 0 18 | Nd4 | Are there any open files in this position? | Yes: c, d | files |
r2qr1k1/pp1n1pbp/6p1/2pP1P2/4N3/3Q3P/PP4P1/R1B2RK1 b - - 0 18 | Qb6 | What piece is on b8? | Empty | occupancy |
r3k2r/p1bb2pp/2p1q3/4pp2/B1N1n3/BPPQ4/P5PP/4RR1K w kq - 2 20 | Rxf5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
1r2N3/1b4Rp/3p4/np4k1/5n2/2P5/PB5P/R4K2 b - - 7 30 | e7g7 | Is the White king in check? | No | check |
4B1r1/p1N2k2/Pp6/1P1P1p2/2P2Knp/7r/8/R7 b - - 1 44 | c6e8 | Is the Black king in check? | Yes | check |
8/5pk1/5p2/1P2p2p/4P2P/q2N2P1/5P1K/3R4 b - - 0 40 | Qb3 | What piece is on b2? | Empty | occupancy |
8/6k1/7p/2p5/8/1NnK3P/pbB3P1/8 b - - 1 48 | Nb5 | Are there any open files in this position? | Yes: b, d, e, f | files |
r1bqk2r/ppp2ppp/2n5/2bn4/2Bp4/2P2N2/PP3PPP/RNBQ1RK1 w kq - 0 8 | Re1+ | Is the move from c4 to b5 legal? | Yes | legality |
1rr5/4ppkp/2Bp2p1/1p6/8/1P4P1/P2RPP1P/5RK1 b - - 0 25 | Rxc6 | Is the c-file open, semi-open, or closed? | open | files |
r1b1kb1r/1p1p2pp/p3p3/q3n3/5Bp1/2N5/PPPQ1P1P/2KR1BR1 w kq - 0 15 | Bxe5 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
rn1qkb1r/pb3ppp/1p2p3/3n4/3P4/P1N2N2/1P3PPP/R1BQKB1R w KQkq - 0 9 | Ne5 | Does Black have any isolated pawns? | No | structure |
rn1r2k1/p1p1qpp1/bp2pn1p/8/Q2P3B/P4N2/1P2PPPP/3RKB1R w K - 4 13 | g4 | What is the material balance in this position? | Equal | material |
r1b1k2r/2qnbppp/p2pp3/1p4P1/3NP3/1PN1B3/1PP1QP1P/2KR3R w kq - 1 14 | Nf5 | Does White have any isolated pawns? | No | structure |
2b1kbr1/5p1p/2np4/1N1Npp2/rP2PP1q/8/P1P3PP/R2Q1RK1 b - - 0 15 | Kd8 | Identify any White knight outposts on the board. | a5 | outposts |
8/k1p2p1p/pp6/8/2NQ4/1P4P1/r1q2P1P/4R1K1 w - - 0 27 | b7b6 | What is the material balance in this position? | White is up 2 pawns of material | material |
2r3k1/3n2pp/1q2bp2/ppn5/3B4/3P1NP1/4PQBP/2R2K2 w - - 8 30 | Be3 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4rk1/pp3pp1/3qb2p/3Np3/2P5/1Q1P1NPn/PP3P1P/R4R1K b - - 0 21 | Rfd8 | Are there any open files in this position? | No | files |
6k1/8/1p4p1/1B3b2/P7/2p1R3/2r5/3K4 w - - 0 54 | Rf3 | Does Black have any passed pawns? | Yes: c3, g6 | structure |
3q1rk1/3N1p1p/p3pbp1/1p6/8/P2Q1P2/1P3p1P/1BR3K1 w - - 0 20 | Kf1 | Are there any open files in this position? | Yes: c, d | files |
1k1n4/1P4pp/r1rp1p2/1R2p3/4P3/4BP2/5P1P/R4K2 w - - 0 31 | Ba7+ | Is the d-file open, semi-open, or closed? | semi-open for White | files |
8/2p5/1p1k2p1/p2P1p2/4rr1p/3R2K1/P4RPP/8 w - - 0 41 | h5h4 | Is the White king in check? | Yes | check |
6k1/1r4p1/4p1Pp/q2p1b2/p2K1P2/3N1R2/p1P3Q1/2R5 b - - 3 43 | Rb1 | Is the Black king in check? | No | check |
r3r1k1/1p3pp1/p7/5P2/6nB/1P5R/P5P1/3R2K1 w - - 1 25 | Rd4 | Does Black have any isolated pawns? | No | structure |
5r1k/1p4p1/8/3R1B1p/1P3P2/7Q/PK6/B5r1 b - - 4 40 | c1b2 | What is the material balance in this position? | White is up 10 pawns of material | material |
r1b2r2/p4pk1/1p3Np1/4p1Q1/3p3P/3P4/Pq3PP1/R4RK1 w - - 0 22 | b7b6 | What is the material balance in this position? | Black is up 1 pawn of material | material |
2r2k2/7p/6p1/3Q4/3p1P2/pP6/1q4PP/2R4K w - - 0 35 | Rxc8+ | Identify any Black knight outposts on the board. | e3 | outposts |
3r4/p1kb4/5R2/1pB3pp/1P6/8/P5PP/3R2K1 w - - 0 33 | h6h5 | What is the material balance in this position? | White is up 5 pawns of material | material |
rn2kbnr/1q4pp/p2p4/2p1pPN1/b7/3P4/B1PB1PPP/R2QK2R w KQkq - 0 15 | d7a4 | What is the material balance in this position? | Black is up 3 pawns of material | material |
2rqkr2/3b1p1B/3b3Q/p2Nn3/8/8/1PP2PPP/3RR1K1 w - - 1 32 | Qxd6 | Is the move from c2 to c5 legal? | No | legality |
rr1q2k1/5pbp/2Q1p1p1/1nPp4/3P4/pP2N1P1/P4P1P/B1RR2K1 b - - 6 25 | h5 | What piece is on f1? | Empty | occupancy |
r1b1k2r/p1pq2pp/2p2pn1/2b1p2Q/2B1P3/5N2/PPP3PP/RN3R1K b kq - 5 13 | Qg4 | Does Black have any isolated pawns? | Yes: a7, c6, c7 | structure |
r3n1k1/1bp1b1pp/p2qp3/np1p4/2pN1P2/P1N5/1P2QPBP/3R1RK1 b - - 0 18 | c6 | Is the move from g7 to f8 legal? | No | legality |
8/3n1k2/8/3PBK2/1p2P3/8/8/8 w - - 0 6 | Bd4 | Identify any White knight outposts on the board. | c6, d5, e6, f5 | outposts |
8/8/8/2p1k3/p1PpN1Pp/3K3P/P7/2b5 b - - 3 130 | Ba3 | Is the f-file open, semi-open, or closed? | open | files |
1k1r3r/1n6/2b2p2/3p3p/3B2p1/8/6PP/1Q3B1K w - - 0 41 | Bxf6 | Is the Black king in check? | No | check |
r5k1/4pp1p/3p2p1/q1P5/4P3/P2bB3/Nr2N1PP/2KR1B1R w - - 0 19 | Kxb2 | Is the Black king in check? | No | check |
1Q6/8/8/8/K7/8/P5k1/7q w - - 0 55 | Qb7+ | What piece is on a2? | White Pawn | occupancy |
r1b1r1k1/3n1ppp/p2q1n2/1p1PN3/5P2/1BN1Q3/PP4PP/R3R1K1 b - - 0 18 | Ng4 | Is the move from f6 to d5 legal? | Yes | legality |
2r1rnk1/pp1qb1pp/4p3/3pPpN1/P2P1PP1/3QB3/1P5P/R5RK w - - 3 22 | Nf3 | What piece is on c8? | Black Rook | occupancy |
8/p2R2p1/1k2B3/2p3p1/P3N3/5P2/1P4Pr/2K5 w - - 4 32 | c7b6 | Identify any Black knight outposts on the board. | d4 | outposts |
r1bqkbnr/1p5p/p7/2p2p2/P3p1p1/NP1nP1P1/1B1PNPBP/R2QK2R w KQkq - 0 14 | b4d3 | Is the White king in check? | Yes | check |
3k4/p1p1R3/8/5Pp1/1P6/3rp3/7P/7K w - - 2 44 | c8d8 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r4rk1/1p2bpp1/pq1p1n1p/2p1p3/2BBP3/2NP1P1P/PPP1QP2/R4RK1 b - - 0 16 | cxd4 | What piece is on b8? | Empty | occupancy |
2kr4/Bp1q1p1Q/4p3/P2p4/2r5/P1p3PP/2Pn1PK1/R3R3 b - - 4 24 | d4 | Is the b-file open, semi-open, or closed? | semi-open for White | files |
5k2/4R3/6p1/7p/r7/5KPP/5P2/8 w - - 3 42 | Re4 | Is the move from e7 to d3 legal? | No | legality |
5rB1/pb1k1pR1/3npP1p/1p1p4/5P2/P7/5P2/2R3K1 w - - 6 32 | f3 | Are there any open files in this position? | Yes: c, g | files |
r3r1k1/pppqbpp1/3p1n1p/8/7B/P1PQ1N2/1PP2PPP/2KRR3 w - - 0 16 | c4 | Is the White king in check? | No | check |
8/8/5p2/4p1p1/3pP1Pp/3P1P1P/2k1K3/8 b - - 0 11 | Kc3 | What piece is on c7? | Empty | occupancy |
r3k2r/p2nqppp/1pp1pn2/8/3P2P1/P1BQPN2/1P3P1P/R3K2R b KQkq - 0 14 | O-O | What piece is on d1? | Empty | occupancy |
r1bqkb1r/pp3npp/2n1p3/2ppp3/3P4/P1PB1N2/1P2QPPP/RNB1K2R w KQkq - 0 9 | dxe5 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
8/1R3pk1/3p3p/4p1p1/5r2/6n1/B3KNP1/8 w - - 5 55 | Ke1 | Does Black have any isolated pawns? | No | structure |
4r3/5k1p/p2b1p2/1pp5/3p4/N1P3P1/PP1P1P1n/R1B2K2 w - - 0 25 | g4h2 | Is the White king in check? | Yes | check |
r1bq2rk/1p2b2p/p3p1n1/2Pp1p1Q/PP1P1p2/2NB1N1P/2R2PP1/4R1K1 w - - 2 26 | Rce2 | Does White have any passed pawns? | No | structure |
rnbqkb1r/pp1p1ppp/4pn2/2pP4/2P5/2N5/PP2PPPP/R1BQKBNR b KQkq - 0 4 | exd5 | Is the c-file open, semi-open, or closed? | closed | files |
3r2k1/2pqnpp1/1p5p/p2P4/P2p1rP1/2P1N3/1PQ2PP1/3RR1K1 w - - 3 23 | g3 | Is the e-file open, semi-open, or closed? | open | files |
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