fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
8/1k6/pb6/4Q1p1/7p/P7/1P3PPP/6K1 b - - 0 39 | e6e5 | What is the material balance in this position? | White is up 8 pawns of material | material |
1r1q1rk1/ppp1bppp/2n5/3p4/3P1Bb1/2PB1N2/P1P2PPP/1R1Q1RK1 w - - 5 12 | Re1 | Identify any Black knight outposts on the board. | None | outposts |
8/1p2b3/2p1n3/3pPp1k/3P1P1p/pP1N1K1P/P4B2/8 w - - 6 43 | Be3 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
r1b1kb1r/p4ppp/2p1p3/P7/2B1P1n1/2N5/1P3PPP/R1BK1R2 b kq - 2 12 | Nxh2 | What piece is on f4? | Empty | occupancy |
2kr3r/ppp3pp/2nbR3/8/3P4/5N2/PP3PPP/R1B3K1 b - - 0 19 | d2d4 | What is the material balance in this position? | White is up 1 pawn of material | material |
r1bqk2r/1pp3pp/p5nn/P2P1p2/1PBNp3/2N1P3/5PPK/R1BQ1R2 b kq - 0 13 | Qh4+ | Does White have any passed pawns? | No | structure |
b1r3k1/4bp1p/p2p1Pp1/Q3p3/8/pP2B1NP/4KPq1/R3R3 b - - 4 35 | Qf3+ | What piece is on g1? | Empty | occupancy |
r3k3/pppb1p2/3p1q1B/8/Q7/N2P1N1P/Pb2BP2/R3K3 w Qq - 2 19 | c8d7 | What is the material balance in this position? | White is up 5 pawns of material | material |
2kr3r/2q1bpp1/pn1pbn2/Np2p1BP/4P3/2N2P2/PPPQ4/R3KB1R w KQ - 1 16 | Bxb5 | Identify any Black knight outposts on the board. | None | outposts |
r7/q5k1/3p2pp/1Qp2p2/4nP2/5N1P/1P4P1/4R1K1 w - - 1 28 | Qc4 | Are there any open files in this position? | Yes: a, e | files |
2rq1rk1/pp1bbpp1/4p2p/n3P3/8/P1NB1N2/1P2QPPP/3R1RK1 b - - 5 17 | Qc7 | Is the d-file open, semi-open, or closed? | open | files |
r2k4/1p1r3p/p3Q3/4p3/4P2P/8/P4PP1/5K2 w - - 2 33 | Qg8+ | What piece is on e6? | White Queen | occupancy |
2R5/1kR5/r2p4/p7/4B3/8/PP3KPP/8 b - - 6 38 | c6c7 | Is the Black king in check? | Yes | check |
r1b1k2r/pp3ppp/4p3/3q4/1n1PB3/2n2N2/1P1B1PPP/R2QK2R w KQkq - 2 13 | Bxd5 | Does Black have any isolated pawns? | No | structure |
r3rn2/2p1q1pk/1b3p1p/p1p1p2N/2P1P1b1/1P2BQ1P/P4PP1/3RR1K1 w - - 0 25 | Qxg4 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
r2q3r/1p1k1pQ1/7n/3bP2p/p2p4/P2B4/1P4PP/2R2R1K w - - 0 23 | e6+ | Is the move from h1 to g1 legal? | Yes | legality |
2rq1brk/5p1p/p3bp2/1p1n4/2pPB2N/P1N3P1/1PQ2P1P/3RR1K1 b - - 1 21 | Nf4 | What piece is on d8? | Black Queen | occupancy |
8/3k4/5P2/7p/p2B4/Kp4P1/8/3b4 w - - 4 49 | Bb2 | Is the move from f6 to b6 legal? | No | legality |
r4b1r/pp1R1Q1p/2p2p2/1q6/4k1P1/2P1B2P/PP3P2/2K5 w - - 1 26 | Qxf6 | What piece is on a8? | Black Rook | occupancy |
8/R7/3k4/1P6/P2K2r1/3P4/8/8 w - - 1 48 | g1g4 | Is the White king in check? | Yes | check |
r1b1k2r/5ppp/2p1p3/q1p5/8/P1N5/1PQ2PPP/R3K1NR w KQkq - 0 17 | b7c6 | What is the material balance in this position? | White is up 2 pawns of material | material |
3r2k1/1pp3p1/4p1r1/5p1p/1PBP1P2/4Q3/P7/B1K2R2 w - - 0 34 | h7h5 | What is the material balance in this position? | White is up 8 pawns of material | material |
3r4/p6p/3k2p1/4p3/2N5/2P5/PP1K1PPP/R3R3 b - - 1 22 | a3c4 | Is the White king in check? | No | check |
r2q1b1r/pp2nk1p/4pn2/3p1pp1/3P4/2NBP1Q1/PP1B1PPP/2R2RK1 w - - 2 13 | f3 | Does White have any passed pawns? | No | structure |
8/4k3/8/3KP3/8/8/8/8 b - - 4 8 | Kd7 | What piece is on d7? | Empty | occupancy |
r1bbr1k1/1p3p1p/p1pq2p1/3pP3/1P1P4/P1N2P1P/2Q2P2/R2R1BK1 b - - 0 19 | Qe7 | Identify any White knight outposts on the board. | None | outposts |
r2q1rk1/pppnnpbp/3p2p1/3Pp3/2P1P3/2N2N2/PP3PPP/R1BQ1RK1 w - - 3 11 | Be3 | Is the move from c3 to b1 legal? | Yes | legality |
r2qr1k1/4bppp/pnp2n2/1p2p3/4P3/PPN2N2/2P2PPP/R1BQR1K1 w - - 0 17 | Nxe5 | Does Black have any isolated pawns? | No | structure |
2kr2r1/pp1bnp2/2n1p1p1/q2pP2p/P1pP4/2P2B1Q/2PBNPPP/R3K2R w KQ - 2 17 | Bg5 | Is the b-file open, semi-open, or closed? | semi-open for White | files |
6qk/pbp4r/6pQ/2p4p/2P3pB/2P5/P4PPP/4R1K1 w - - 2 32 | Bf6+ | Is the d-file open, semi-open, or closed? | open | files |
2k4R/8/2p4P/1p6/1P6/3p2pK/6P1/2r5 b - - 3 44 | Kd7 | Does White have any isolated pawns? | Yes: b4 | structure |
r1bqn1k1/p3n1bp/3p2r1/P1pPp1p1/2P1Pp2/1NN2P2/3BB1PP/1R1Q1RK1 b - - 3 18 | Nf6 | Identify any Black knight outposts on the board. | None | outposts |
rnb5/pp1k2b1/2p2n2/4N3/2P3p1/6P1/PP1N1P2/R1BBK3 b Q - 0 19 | f7e5 | Is the Black king in check? | Yes | check |
5k2/5p2/6p1/B6p/P7/3K2P1/1b5P/8 w - - 1 39 | Bb6 | Identify any Black knight outposts on the board. | None | outposts |
2BbR3/1bq2pk1/p2p2r1/2nP2BP/1p2nP1Q/7R/PPP4P/2K5 b - - 0 26 | b3 | Is the e-file open, semi-open, or closed? | open | files |
k6r/p6p/2n1BbpP/3p4/1ppP4/2P2N2/1P4P1/1K1bR3 w - - 0 34 | Bxd5 | Is the White king in check? | No | check |
r1b2rk1/pp3p1p/nqpp2pb/3Pp3/2P1P3/2N1PN1P/PP1QBKP1/R4R2 b - - 4 13 | Nc5 | What piece is on b5? | Empty | occupancy |
5bqk/2rr3p/pn1p1p2/1p1npP2/4B1NR/2P3P1/PP3P1R/2B3KQ w - - 6 36 | Be3 | What piece is on e2? | Empty | occupancy |
7k/7p/1p1p1p2/2bP4/2P1p3/1N2PnP1/3N1P1q/2Q2R1K w - - 0 31 | h3h2 | Is the Black king in check? | No | check |
8/2pNnBk1/p4Rp1/P7/1p2P1p1/1N1Pq1P1/1PP2RK1/7r b - - 6 32 | Qh6 | Is the f-file open, semi-open, or closed? | open | files |
rn1qk2r/ppp2ppp/4bn2/8/1bPP4/8/PP3PPP/RNBQKBNR w KQkq - 1 6 | Nc3 | Identify any Black knight outposts on the board. | None | outposts |
7R/8/PP6/r5k1/3K3p/8/5p2/8 w - - 0 59 | Rg8+ | What piece is on f2? | Black Pawn | occupancy |
5bk1/1b4p1/1pp5/p1rpr3/P7/2NN3P/BPP2PP1/3R2K1 b - - 1 29 | Rxc3 | Does Black have any isolated pawns? | Yes: g7 | structure |
r1br2k1/ppq2ppp/4p3/4P3/5P2/1PP5/4Q1BP/2R2RK1 w - - 2 22 | Rfd1 | What piece is on b8? | Empty | occupancy |
3r1rk1/6pp/1pB2p2/1P1p4/R2Pq3/P3R1P1/5P1P/5QK1 b - - 2 32 | f3e3 | Identify any White knight outposts on the board. | b4 | outposts |
r4rk1/p1p2ppp/5n2/8/b7/5PP1/PN2PB1P/R3R1K1 b - - 0 19 | Bb5 | Is the move from g7 to g6 legal? | Yes | legality |
7r/1b2n1pp/6k1/RP6/3N4/2n3P1/4PPBP/6K1 b - - 0 25 | Rb8 | Is the move from b7 to c6 legal? | Yes | legality |
7k/p2b1Pp1/2pbp2p/1q1pB3/7P/5R2/PP3PK1/R7 b - - 4 31 | Bf8 | Is the move from c6 to g7 legal? | No | legality |
8/1pq2Rpk/7p/p1br3P/3p1PP1/P2N4/1P2P3/1K6 w - - 0 51 | Rxc7 | Identify any Black knight outposts on the board. | e3 | outposts |
r7/P7/8/6pp/1R5k/7P/5KP1/8 b - - 1 50 | b7b4 | Is the Black king in check? | Yes | check |
r5k1/pp2n1q1/2ppPpp1/8/2B4Q/4R3/PP3P1P/6K1 w - - 1 25 | Bd3 | Does White have any passed pawns? | Yes: e6 | structure |
8/2b1k3/bp5p/p7/5pN1/1P6/P4PPP/4R1K1 b - - 2 38 | e5g4 | Is the Black king in check? | Yes | check |
7r/1ppb1pk1/1n1b1qp1/p2Pp2r/P3P3/1P1NQ1P1/2RN2BP/2R3K1 w - - 3 29 | Nf1 | Is the move from h2 to h4 legal? | Yes | legality |
r1bqk2r/ppp2pp1/2n2n1p/2b1p3/2B1P2B/3P1N2/PPP3PP/RN1QK2R b KQkq - 1 8 | Bg4 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
3r3r/1pqb1k2/p3pppQ/2p5/8/2P5/PP1R1PPP/3R2K1 w - - 0 23 | Qxh8 | Is the White king in check? | No | check |
8/1p6/1p3b2/2p2k2/2P1Q3/3KP3/r2P4/8 b - - 3 72 | e8e4 | Is the White king in check? | No | check |
r3k2r/1p1nbpp1/1qp1pn1p/p6P/1P1P1B2/2PQ1NN1/P4PP1/R3R1K1 w kq - 0 16 | Nf5 | Is the move from f3 to d5 legal? | No | legality |
2r1k1r1/pp2bp2/7p/5p1P/q7/3R4/PPP1QPP1/1K1R4 w - - 0 23 | Re1 | What piece is on a8? | Empty | occupancy |
r2q1rk1/1b1npnbp/p4pp1/Pp1p4/3P4/2N2N1P/1PP2PPB/R2QRBK1 w - - 0 15 | Re6 | Does Black have any passed pawns? | No | structure |
2r1r3/1pkq3p/p3RQ2/2pp4/8/1P6/1PP2PPP/4R1K1 w - - 1 24 | Qe5+ | Does White have any isolated pawns? | No | structure |
r1bqkbnr/ppp2ppp/2Bp4/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq - 0 4 | b5c6 | Is the Black king in check? | Yes | check |
r6r/p3R2p/1p3Nk1/n1p2ppN/3n4/B2B1p2/P1P2KbP/R7 w - - 0 24 | Rg7+ | Are there any open files in this position? | Yes: d, e | files |
7r/4k3/2p1pR2/p1r4b/4P1pp/PP6/1KB3PP/5R2 w - - 0 34 | Bd3 | Identify any White knight outposts on the board. | a4, c4 | outposts |
r2q1rk1/p2n1ppp/2p1pn2/3p4/P1bP4/6P1/2NQPPBP/R1B1R1K1 w - - 0 15 | Ba3 | Does White have any isolated pawns? | Yes: a4 | structure |
rnbq1k1r/pp2ppbp/6p1/1B2P3/3N2n1/2N5/PPP3PP/R1BQK2R w KQ - 3 10 | Ne6+ | Is the move from a2 to c7 legal? | No | legality |
r1b1kb1r/pp2pppp/2n5/6q1/3P4/2N5/PP3PPP/R2QKBNR w KQkq - 0 10 | Nf3 | What is the material balance in this position? | Equal | material |
2r3k1/5p1p/p4p2/8/8/1P4K1/P1B3P1/3R4 b - - 0 26 | Rxc2 | Identify any White knight outposts on the board. | a4, c4 | outposts |
8/8/1p6/7B/1P6/2Pn1pk1/8/5K2 w - - 3 71 | Bf7 | Is the move from h5 to d6 legal? | No | legality |
rnbqk1nr/1pp1ppbp/p2p2p1/8/3PPP2/2N1B3/PPP3PP/R2QKBNR b KQkq - 0 5 | b5 | Is the b-file open, semi-open, or closed? | closed | files |
2kb3r/ppp2R2/4p3/4P2p/2pP2p1/2P5/P1PB2PP/6K1 b - - 0 23 | b5 | Does White have any passed pawns? | No | structure |
r3k2r/pbpq1ppp/1pnp1n2/3Pp3/Q1P1P3/P1PBBP2/6PP/R3K1NR w KQkq - 1 12 | dxc6 | What piece is on d4? | Empty | occupancy |
r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5N2/PP2PPPP/RNBQKB1R w KQkq - 2 5 | g3 | Is the move from b1 to c3 legal? | Yes | legality |
Q7/1K6/8/8/8/7p/6k1/8 b - - 0 56 | h2 | What is the material balance in this position? | White is up 8 pawns of material | material |
r1bqk2r/pp1nbp1p/2n1p1p1/2ppP3/3P3P/2PB1N2/PP1N1PP1/R1BQK2R w KQkq - 1 9 | h5 | Identify any Black knight outposts on the board. | None | outposts |
8/8/p2k2b1/1p4p1/3p3p/1P3PP1/P1N3P1/2K5 b - - 1 33 | Kc5 | Is the move from g6 to g3 legal? | No | legality |
3k1b1r/pp5p/2r2pq1/2P1B3/2R5/4P1PQ/P2P3P/6K1 w - - 2 30 | Rd4+ | What is the material balance in this position? | Black is up 3 pawns of material | material |
1r2r3/1b3k2/p1p2p2/N1Bp1n2/RP5p/2P2P2/5KPP/R7 b - - 4 26 | Ba8 | What piece is on c3? | White Pawn | occupancy |
3r2k1/pp3ppp/1b6/8/1P4b1/P4P2/7P/R3KB1R b - - 0 21 | Bxf3 | Is the move from g8 to f8 legal? | Yes | legality |
rnb1Q3/pp5p/2p5/3k4/8/2P5/P1P2qPP/2K3NR w - - 1 24 | Nf3 | What is the material balance in this position? | Black is up 2 pawns of material | material |
2k2R2/7R/8/8/1P6/4P1P1/r2r1PKP/8 b - - 2 41 | f6f8 | Is the Black king in check? | Yes | check |
8/2k2n2/pp3p1r/4p2R/4P2P/4PK2/P1P3P1/8 w - - 0 32 | Kg4 | Does White have any isolated pawns? | Yes: a2, c2, e3, e4 | structure |
r6r/2q2kp1/2p1p3/b2p1p2/R2PnPP1/4B2P/Q5B1/R5K1 b - - 5 29 | Nc3 | What piece is on b8? | Empty | occupancy |
r1bqkb1r/pp2pppp/2n2n2/8/2P5/8/PP1P1PPP/RNBQKBNR w KQkq - 0 5 | b3 | What piece is on d1? | White Queen | occupancy |
1r1q1rk1/3nppbp/b1np2p1/2p5/pp2PPP1/3PB2P/PPPQN1B1/1R1N1RK1 w - - 0 15 | b3 | Are there any open files in this position? | No | files |
r1b1kb1r/p1p1pppp/2nq4/8/Q1pP4/5P2/PP4PP/R1B1KBNR w KQkq - 2 9 | Bxc4 | Are there any open files in this position? | No | files |
5r1k/1p1r2p1/6qp/P7/3B4/4PP2/4BKPP/2R5 w - - 0 32 | h7h6 | What is the material balance in this position? | Black is up 6 pawns of material | material |
6k1/ppr2p2/4p1p1/1Q1nP1Np/7P/8/P1p2RPK/2q5 b - - 3 34 | Qxg5 | Identify any Black knight outposts on the board. | None | outposts |
2r2rk1/2q1b1p1/p3p1Pp/1pnbP3/3NpP2/2P1B3/PPQ1B3/1K1R3R w - - 0 21 | Bg4 | What piece is on f7? | Empty | occupancy |
r1bqk2r/pp1p1ppp/3Q1n2/8/8/2N2N2/PP3PPP/n1BK1B1R w kq - 0 12 | Bc4 | Identify any Black knight outposts on the board. | None | outposts |
r1b1kb1r/5p2/p1pppp2/2q2P1p/4P3/2N5/P1PQB1PP/1R3R1K b kq - 2 3 | Qe5 | Does Black have any isolated pawns? | Yes: a6, h5 | structure |
r1b2rk1/5p1p/pq1p2pQ/3P2P1/1p3P1P/3P4/PP6/2K1R2R b - - 0 23 | Bg4 | Does White have any passed pawns? | No | structure |
r2qr1k1/1p3ppp/p1n2n2/1p1pp1Bb/1P2P3/1BPP1N1P/P3QPP1/R4RK1 b - - 1 15 | Bxf3 | Does Black have any passed pawns? | No | structure |
r1b1k2r/pp2pp1p/2p3p1/8/4P3/1Bq1B3/P1P1K1PP/R2Q3R b kq - 0 13 | Bg4+ | Does White have any isolated pawns? | Yes: a2, c2, e4 | structure |
4r1k1/pp5p/1n4p1/1P1p1pK1/3P1P2/7P/8/6q1 w - - 2 43 | c1g1 | Is the White king in check? | Yes | check |
r2r1nk1/1b2qppp/1p2pn2/p1b5/2NN4/PP1BP3/1B2QPPP/R2R2K1 w - - 4 16 | Ne5 | Does Black have any passed pawns? | No | structure |
1r2k2r/pp2npp1/Q1n1p2p/3pP3/3P2PP/4B2B/P4PK1/3R3R b k - 0 19 | bxa6 | Is the move from e6 to h3 legal? | No | legality |
r1bqkb1r/pp3p1p/2n1pp2/8/2Q5/2N2N2/PP2PPPP/R3KB1R b KQkq - 0 9 | Qb6 | Identify any Black knight outposts on the board. | None | outposts |
4kr2/3n1p1p/p3p1b1/2qp2P1/1QB5/8/P1PN2P1/1K1R4 w - - 3 26 | Qxc5 | Does Black have any isolated pawns? | Yes: a6, h7 | structure |
2rqr1k1/5p2/p2b1n1p/3P1bp1/1p6/1P3BB1/PQ3PPP/1N1R1RK1 b - - 0 23 | g4 | Is the c-file open, semi-open, or closed? | open | files |
8/6b1/4N1k1/7p/1p3P2/1Pr2K2/4R2P/8 w - - 2 53 | Ke4 | Is the move from e2 to e3 legal? | Yes | legality |
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