fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
2Q3k1/2p1qp2/7p/4p2p/2Pp4/2nP1BP1/5PK1/8 b - - 1 38 | Kg7 | Is the move from g8 to h7 legal? | Yes | legality |
1k6/1p6/8/4P3/P3rPP1/7r/3K4/1RB2B1b b - - 7 34 | Rd4+ | Does Black have any isolated pawns? | Yes: b7 | structure |
5k2/3R3p/8/2p1P3/8/7r/5K2/r5R1 b - - 7 39 | f1f2 | What is the material balance in this position? | Black is up 1 pawn of material | material |
2kr3r/p1pn1ppp/1pb1p3/4P3/5P2/4B1P1/PPP1B2P/R2R2K1 b - - 2 15 | Nb8 | Does White have any isolated pawns? | No | structure |
3b1r2/3R1pk1/1p6/p5P1/5K2/1P1B4/P7/8 w - - 1 39 | Kf5 | What piece is on g1? | Empty | occupancy |
3k1r2/pr4QR/1p2ppp1/1P1p4/P2P4/5P2/4PK2/8 w - - 0 23 | Qxf8# | What is the material balance in this position? | White is up 3 pawns of material | material |
k1r5/1p1r1pp1/p3p1p1/q1Pn4/3P1P2/3R4/1Q4PP/1R3NK1 w - - 2 36 | Nd2 | Identify any White knight outposts on the board. | None | outposts |
8/1R6/1p4p1/8/6Qk/1r2p2P/8/4R1K1 b - - 0 48 | c8g4 | Is the White king in check? | No | check |
r1bq1rk1/pp2nppp/4pb2/3nN3/3PB3/2N5/PP3PPP/R1BQR1K1 b - - 9 12 | Nc6 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
rn1qkb1r/pp1Bpppp/3p1n2/2p5/5P2/4PN2/PPPP2PP/RNBQK2R b KQkq - 0 5 | b5d7 | Is the Black king in check? | Yes | check |
r3kbnr/1p1b1ppp/1qn1p3/p1ppP3/3P4/P1P2N2/1PB2PPP/RNBQK2R b KQkq - 3 8 | Nh6 | Is the h-file open, semi-open, or closed? | closed | files |
r3k2r/pp1b1p1p/2np2p1/2p4n/2P1PPPq/2PB3P/P3N1K1/R1BQ1R2 b kq - 2 14 | O-O-O | Is the Black king in check? | No | check |
r6r/p1pk3p/p5p1/6p1/4QbPP/q1P1P3/P5P1/3K1R1R w - - 10 22 | exf4 | Does White have any isolated pawns? | Yes: a2, c3, e3 | structure |
rn1qk2r/pp2bp2/2p1p1pn/3pPb2/3P1P1p/2NB1N1P/PPP2BP1/R2Q1R1K w kq - 0 13 | Ne2 | Is the move from b2 to e8 legal? | No | legality |
rn1qkbnr/1b3ppp/p2pp3/1p6/3NP3/2N1BP2/PPPQ2PP/R3KB1R b KQkq - 3 8 | Nf6 | Is the move from h8 to g8 legal? | No | legality |
5rk1/4n3/1NrqppPb/1R1p3p/3P4/1Q2PN2/P6P/6RK w - - 1 27 | Na4 | Does Black have any isolated pawns? | Yes: h5 | structure |
4k3/p2n1pp1/8/1P1pP1p1/P4q2/2Q2P2/1P4B1/5K2 b - - 0 27 | Qxa4 | What piece is on f7? | Black Pawn | occupancy |
r1b1r1k1/1p2qpp1/2p2n1p/p2p3n/P2P4/2NBP3/1PQ2PPP/2N1RRK1 b - - 3 15 | Ne4 | Does Black have any isolated pawns? | No | structure |
r1bq1rk1/ppp1nppp/4p3/b7/2PP4/1QN3P1/P2P1PBP/R1B2RK1 b - - 4 11 | Nf5 | Is the Black king in check? | No | check |
4r1k1/5pp1/1Q5p/p7/P3P3/6R1/1P3P2/3q1K2 w - - 2 44 | h5d1 | Is the White king in check? | Yes | check |
r3kb1r/ppqn1ppp/2p1pn2/6B1/8/3B1N2/PPP1QPPP/R4RK1 b kq - 5 12 | Bd6 | Is the move from e6 to c5 legal? | No | legality |
r2qk2r/pb1n1ppp/1ppbpn2/3p4/2P3P1/1PN1PN2/PBQPBP1P/R3K2R b KQkq - 0 9 | O-O | Is the White king in check? | No | check |
6k1/p1q3p1/2p2b2/P1Pp4/3PrP2/2B4r/1PQ4P/2K2RR1 w - - 5 35 | Rg4 | Is the move from c2 to d3 legal? | Yes | legality |
rnbq1rk1/pp1nppbp/6p1/2P5/2B1NP2/4P3/P2B2PP/1R1QK1NR w K - 2 12 | Nf3 | Is the move from c4 to e6 legal? | Yes | legality |
6k1/pp1bppbp/3p1np1/8/2r1P1PP/1NP1BP2/PKP5/3R3R b - - 1 18 | Nxe4 | What piece is on g4? | White Pawn | occupancy |
5rk1/6b1/p2p4/3P2Q1/b3PPNp/7P/3n2K1/8 b - - 4 39 | Bc2 | Are there any open files in this position? | Yes: b, c, g | files |
r4rk1/1p1b2p1/p2qppN1/3p3Q/1n1P4/2N2R2/PP5P/R6K w - - 2 25 | Rg1 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2r3k1/4rppp/p1q1p3/1p1n4/3PB3/P4Q1P/1P3PP1/3RR1K1 w - - 0 2 | Bxd5 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
3qk2r/p1pn1ppp/1r2p3/2bp4/Q2PB3/8/PP3PPP/R1B1K1NR b KQk - 4 13 | Bb4+ | Is the move from d8 to f6 legal? | Yes | legality |
2kr2r1/1b5p/p2pn1qB/1pp1p1p1/4P3/1PPPQNP1/1P3P1R/3RK3 b - - 0 25 | Rd7 | Are there any open files in this position? | No | files |
r2qr1k1/1bpp1ppp/1pn5/4P3/1p3Q2/1N3N2/PPP2PPP/R3R1K1 b - - 3 15 | h6 | Is the move from a8 to e1 legal? | No | legality |
2r3k1/4rppp/p1q5/1p1p4/3P4/P4Q1P/1P3PP1/3RR1K1 w - - 0 3 | Rxe7 | What piece is on d5? | Black Pawn | occupancy |
3q2k1/6b1/3p4/p1pN1p1p/PpP2PbP/1P4P1/7K/2B1Q3 b - - 0 34 | Kf7 | What piece is on d5? | White Knight | occupancy |
rnbqk2r/pp1p1ppp/4pn2/8/1bPN4/2N3P1/PP2PP1P/R1BQKB1R b KQkq - 0 6 | O-O | Identify any Black knight outposts on the board. | None | outposts |
rnbqkb1r/ppp1pppp/5n2/8/2pP4/4PN2/PP3PPP/RNBQKB1R b KQkq - 0 4 | Bg4 | What piece is on h7? | Black Pawn | occupancy |
r3kbr1/pp2pp1p/2p5/8/2Q2Bq1/6P1/PPP2P1P/R2R2K1 b q - 0 18 | e5 | Is the move from g8 to d1 legal? | No | legality |
6k1/6bp/r2n1pp1/q7/1pPBpP2/4P1P1/5N1P/1Q2R1K1 b - - 0 33 | f5 | Identify any Black knight outposts on the board. | a3, c3 | outposts |
r2qrnk1/pbp2pbp/1p4p1/3n4/3P4/1QN2B1P/PP1N1PPB/R4RK1 b - - 1 15 | c6 | What is the material balance in this position? | Equal | material |
r1bqrk2/p2nbppB/2p2n2/1p4N1/7Q/2N5/PPP2PPP/2KRR3 w - - 3 16 | Bf5 | What is the material balance in this position? | Black is up 2 pawns of material | material |
rn2kbnr/pp1q4/2p1p3/6pp/2BPP3/2N2P1P/PP3P2/R2QK2R w KQkq - 0 12 | e7e6 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2kr1bnr/ppp2p1p/1qnp4/6p1/1P1PPB2/P1N2K2/2P1B1PP/R2Q3R w - - 1 13 | Be3 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
r6k/pp3Q2/1q2p3/8/8/5b2/PPP2PPP/5RK1 w - - 1 25 | Qxf3 | Identify any Black knight outposts on the board. | None | outposts |
2rq1rk1/pb3ppp/1pn1pb2/3p4/2PP4/BP3NP1/P2Q1PBP/R4RK1 b - - 1 15 | Re8 | Does Black have any passed pawns? | No | structure |
r7/5k2/3P1Bp1/1ppb1pP1/5R1K/2P4P/p1P3r1/R7 b - - 6 44 | Ke6 | Is the d-file open, semi-open, or closed? | semi-open for Black | files |
r6r/pb1k2p1/3b1q1p/1Pppp3/4P3/5NP1/PP2QP1P/RN3RK1 b - - 2 15 | d4 | Is the White king in check? | No | check |
8/1r6/8/8/2K3p1/4R1k1/8/8 b - - 1 63 | Kf2 | What piece is on e3? | White Rook | occupancy |
8/8/3K4/3P1p2/3P1pk1/8/P4p1r/5R2 w - - 1 37 | Ke5 | Is the move from d5 to c5 legal? | No | legality |
3r4/2pk1p1p/Q1p3p1/P1qp4/2n1P3/8/6PP/3RKB1R b - - 6 25 | Nb2 | Does Black have any isolated pawns? | No | structure |
r4r1k/1p5p/2p1b1p1/p3P1P1/6Pq/3B2RP/PPQ3K1/7R b - - 0 29 | Qxg5 | Identify any White knight outposts on the board. | None | outposts |
br1r1bk1/7p/pp1p4/6p1/P3P3/1PNR2P1/2P2BBP/7K b - - 0 30 | g4 | Does White have any passed pawns? | No | structure |
2r3k1/pp3rp1/1n2p3/5pB1/3Pb2R/8/PP2Q3/K7 w - - 5 30 | Qh2 | Does Black have any passed pawns? | Yes: f5, g7 | structure |
2kr1b1r/ppp2ppp/2n5/3P4/Q7/2N1qB2/PP4PP/1K1R3R b - - 1 15 | Ne5 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
r1b5/ppp5/3p2qk/2b4p/1nB2Q2/5NP1/PPPN1P1P/2KRR3 b - - 4 21 | f6f4 | Is the Black king in check? | Yes | check |
3r4/pprNb2p/4p1bk/qB2Q3/3R4/4P3/P5PP/5RK1 w - - 9 29 | Qxe6 | Is the move from f1 to b7 legal? | No | legality |
4r1k1/pp1rbppp/1qp1pnn1/8/1PPP4/P1N2NBP/4QPP1/R3R1K1 w - - 5 19 | c5 | Is the move from g1 to h2 legal? | Yes | legality |
2r2rk1/1bqnnppp/p3p3/1p1pP2Q/5B1P/P1P3P1/NP3PB1/R3R1K1 b - - 0 17 | d4 | Is the move from d5 to d4 legal? | Yes | legality |
r3kbnr/pbpn4/1p3p2/8/2P1P1p1/2N3P1/PP1N2Bq/R1BQ1RK1 w kq - 0 14 | h7h2 | Is the Black king in check? | No | check |
r1q3k1/ppp2p2/2np1Bb1/3Nr3/8/1B4Q1/PP3PPP/5RK1 w - - 1 22 | Nxc7 | What is the material balance in this position? | Black is up 2 pawns of material | material |
r5nQ/1p1kb3/p2p2b1/3pP3/2P5/7P/PP1R2P1/K6R w - - 1 26 | Qg7 | Is the move from d2 to d3 legal? | Yes | legality |
Q1b1k2r/p2qbp2/5p1p/np2p3/8/8/PPPP1PPP/RNB2RK1 w k - 0 13 | Qe4 | Are there any open files in this position? | No | files |
rq4k1/p3n1bp/b2p2p1/P2Pp3/Nr2Pp2/R4PP1/1P1Q1BBP/R5K1 b - - 1 27 | Bh6 | Does Black have any isolated pawns? | Yes: a7 | structure |
3r1k1r/p4Qpp/n2P4/q1p5/8/1BP4P/P4PP1/R3K2R b KQ - 0 19 | f3f7 | Is the Black king in check? | Yes | check |
5Q2/p1k5/1p1Q3K/2p1P3/8/8/PP6/8 b - - 2 64 | g6d6 | What is the material balance in this position? | White is up 18 pawns of material | material |
r2qkbnr/1pp2ppp/p1p5/4p3/4P1b1/5N2/PPPP1PPP/RNBQ1RK1 w kq - 2 6 | h3 | Is the move from b1 to h2 legal? | No | legality |
2k2r2/1b3p2/pn1qp2p/1p4p1/3P4/5B2/5PPP/R2Q1RK1 w - - 0 26 | Rc1+ | Is the Black king in check? | No | check |
2r5/1b1nkp1p/4p3/1B2q3/P2p1pQ1/5N2/1P3PPP/R5K1 b - - 5 26 | Qf6 | Are there any open files in this position? | Yes: c | files |
2r2r1k/pq2bpp1/1p2pn1p/8/1PP1p2P/P3PN2/4BPP1/RQ2K2R w KQ - 0 21 | Nd4 | Is the move from b1 to g7 legal? | No | legality |
2kr1bnr/ppp1pppp/2n5/3q3b/8/5N1P/PPPPBPP1/RNBQ1RK1 w - - 1 7 | d4 | What piece is on b2? | White Pawn | occupancy |
r1r2k2/pp1qR2p/5pp1/3p2N1/6Q1/8/PP3PPP/2R3K1 w - - 1 23 | Rf7+ | What is the material balance in this position? | White is up 2 pawns of material | material |
r3qr1k/p2n2p1/Pp1P1p1p/1Pp1pQ1P/2P5/2B5/5PP1/R3R1K1 w - - 2 35 | Rad1 | Identify any Black knight outposts on the board. | None | outposts |
4k2r/rppn2pp/8/1QP2q2/4p3/4B3/PPP3PP/R3K2R b KQk - 1 15 | O-O | Does Black have any isolated pawns? | Yes: e4 | structure |
8/P1B5/6K1/8/8/5k2/8/7q w - - 0 5 | a8=Q+ | What piece is on g5? | Empty | occupancy |
r1b1k2r/2qnbppp/p2pp3/1p3PP1/3NP3/2N2Q2/PPP4P/2KR1B1R b kq - 0 13 | Nc5 | Identify any Black knight outposts on the board. | None | outposts |
3q1rk1/p1R1bp2/2Qnp2p/8/3P4/6P1/PP2PP2/3R2K1 b - - 3 22 | Re8 | Is the Black king in check? | No | check |
rnbqkb1r/pp2pp1p/3p1np1/2pP4/4P3/2N5/PPP2PPP/R1BQKBNR w KQkq - 0 5 | f4 | Is the f-file open, semi-open, or closed? | closed | files |
5k2/1p4pP/p7/1p1p4/8/2r3K1/6PP/8 w - - 5 38 | Kg4 | Is the f-file open, semi-open, or closed? | open | files |
5r2/pp4p1/2p4k/6P1/5p1K/2P5/P1P3r1/2R2R2 b - - 0 28 | g4g5 | Is the Black king in check? | Yes | check |
2k5/1p1r4/p1p1Q3/4bpBn/2PP4/P6q/KP5P/8 w - - 0 42 | Qe8+ | What is the material balance in this position? | Black is up 7 pawns of material | material |
r1bqkb1r/pppn1ppp/8/3pN3/3Pn3/3B4/PPP2PPP/RNBQK2R w KQkq - 1 6 | Nxf7 | What piece is on e1? | White King | occupancy |
8/1r1nkp2/b3p3/4n2p/P2NP3/1P3P2/1BP4P/1K4R1 w - - 9 30 | Rg5 | Is the move from g1 to c6 legal? | No | legality |
1rbqr1k1/5p1p/p2p1npb/1pnPp1B1/P1p1P3/2P3NP/1PBQ1PP1/R3R1K1 w - - 0 22 | Bxh6 | Is the c-file open, semi-open, or closed? | closed | files |
r2q1rk1/1b1pnpp1/p4n1p/3pp3/P3P3/BBPP4/3N1PPP/R2Q1RK1 b - - 1 15 | dxe4 | Is the b-file open, semi-open, or closed? | open | files |
3qr3/1b1r4/p2p1bp1/1p2p3/6k1/P2QB3/1PP3PP/5R1K b - - 9 31 | Bxg2+ | Identify any Black knight outposts on the board. | e5 | outposts |
rnbq1rk1/ppp1ppbp/3p1np1/8/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQ - 0 6 | e4 | Identify any Black knight outposts on the board. | None | outposts |
r6r/2kbb1pp/p1p1n1q1/1p2P3/1P1N4/2Pp1B2/P5PP/R1B1QRK1 w - - 1 23 | Be4 | What piece is on c6? | Black Pawn | occupancy |
r1b1kb1r/pp3p1p/3Pp1p1/2p1P3/1n6/5NP1/PPK1Q1BP/R1B4q w kq - 4 16 | Kb3 | Does Black have any passed pawns? | No | structure |
8/p2Rk1pp/1p1npp2/3b4/PP1P4/5P2/3NKBPP/8 b - - 0 33 | Kxd7 | Does Black have any passed pawns? | No | structure |
6k1/2p2p2/1p1p2p1/2nP3p/5P1P/6P1/Pq4BK/4Q3 b - - 0 33 | Kf8 | What piece is on d5? | White Pawn | occupancy |
8/P7/2Rk4/8/5pK1/3N2p1/r5P1/8 b - - 20 50 | c7c6 | Is the Black king in check? | Yes | check |
rnb1k1nr/ppp2p1p/8/3P4/1b1P1B1q/2N2Q2/PPPK2PP/R4B1R b kq - 2 9 | Ne7 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
r4rk1/pb3pp1/2p2P1p/1ppq4/2N4n/2PB1P2/P1Q3PP/4RRK1 w - - 0 22 | Ne5 | Is the move from d3 to a4 legal? | No | legality |
r1bqk1nr/3nppbp/p2p2p1/8/P2PPP2/3B1N2/4N1PP/R1BQK2R b KQkq - 0 11 | Ngf6 | Does White have any isolated pawns? | Yes: a4 | structure |
8/6kp/8/p7/4R3/6K1/1P1r3P/8 b - - 4 45 | Rxb2 | Identify any Black knight outposts on the board. | b4 | outposts |
r2qk1r1/ppbnnppb/2p1p2p/3pP2P/1PPP2Q1/P1N1B1N1/5PP1/R3KB1R w KQq - 5 14 | cxd5 | Are there any open files in this position? | No | files |
8/p1k2p2/1p1p1P2/2pP4/4B2n/P1P5/5K2/8 w - - 2 6 | Kg3 | Is the h-file open, semi-open, or closed? | open | files |
8/p3q1kp/1p2Pnp1/3pQ3/2pP4/1nP3N1/1B4PP/6K1 w - - 5 30 | Ba3 | Is the e-file open, semi-open, or closed? | semi-open for Black | files |
8/1p1kb1pp/p2pp1q1/4p1n1/3n2B1/P7/1P1N1PPP/3QR1K1 b - - 2 8 | Qc2 | Identify any Black knight outposts on the board. | d4, d5 | outposts |
r2qr1k1/pppb1pbp/3p1np1/2nP4/2PN4/2N1B3/PP1QBPPP/4RRK1 w - - 5 14 | f3 | Identify any Black knight outposts on the board. | None | outposts |
r7/1k6/1p2R2p/2p1P2R/2P5/B1P1KP2/P1b3P1/r7 w - - 3 38 | Re7+ | Does White have any passed pawns? | Yes: e5, f3 | structure |
1n1r4/1b2p3/7k/1B3n2/7p/2N2N1P/5PP1/5RK1 w - - 3 27 | c8b7 | What is the material balance in this position? | White is up 1 pawn of material | material |
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