fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
2r5/4k1p1/3nP2p/p1rp4/P4P2/3B3P/1R6/4R1K1 b - - 0 49 | Rc1 | What piece is on c6? | Empty | occupancy |
1k1r3r/pp1nbppp/2p5/4pP2/4N1P1/3PB2P/PP3P2/R3K2R w KQ - 3 17 | Ke2 | Does Black have any isolated pawns? | No | structure |
3r1R1k/2p3pp/p3B3/1p6/4P3/P3K2P/8/6R1 b - - 0 28 | f1f8 | Is the White king in check? | No | check |
r2q1rk1/pp3ppp/1bn5/3p1b2/1P6/P4NP1/4PPBP/R1BQ1RK1 w - - 1 13 | Bb2 | What is the material balance in this position? | Equal | material |
r1bq1b1r/ppN2kpp/2np1n2/3Np3/2B1P3/4pQ2/PPP2PPP/R3K2R b KQ - 5 12 | Nd4 | Is the move from c6 to a1 legal? | No | legality |
r2qkb1r/1p2pppp/p4n2/3pnP2/3P4/2N1P3/PP3P1P/R1BQKB1R b KQkq - 0 9 | Nc6 | What is the material balance in this position? | Equal | material |
r5k1/pp4p1/2b1pr1p/n2n4/3PN3/P2BB3/5PPP/2R2RK1 b - - 1 22 | Rff8 | Does White have any isolated pawns? | Yes: a3, d4 | structure |
6Q1/8/2p5/p6K/8/P1p5/1k6/8 w - - 1 47 | b3b2 | What is the material balance in this position? | White is up 7 pawns of material | material |
r1bn1rk1/pp1nbppp/1q2p3/2ppP3/3P1N2/2PB1N2/PP3PPP/R1BQ1RK1 w - - 9 11 | Qc2 | Identify any Black knight outposts on the board. | None | outposts |
6r1/pp3k1p/1q6/3pPn2/3n1Q2/2BB1P2/PP5K/2R2R2 b - - 0 30 | Qg6 | Does Black have any passed pawns? | Yes: d5, h7 | structure |
8/8/8/7p/3p2qK/4kp2/8/8 w - - 6 63 | g2g4 | Is the White king in check? | Yes | check |
4kb1r/5ppp/2Np3q/3PpQ2/8/6PK/7P/8 w - - 5 36 | d2h6 | Is the White king in check? | Yes | check |
r3k2r/3p1pp1/p1q1p3/1pb1P1Bp/P4P2/3Q1b2/1PP3PP/R4R1K w kq - 0 17 | Rxf3 | Does Black have any isolated pawns? | No | structure |
1r2qk2/3nNpb1/1r1P4/1ppBp1PQ/8/7P/1P3P2/4R1K1 w - - 11 36 | Nf5 | Is the move from d5 to f3 legal? | Yes | legality |
4k3/p2P1pp1/7p/1p3B2/q7/3R2P1/P4P1P/6K1 b - - 0 32 | Kd8 | What piece is on g2? | Empty | occupancy |
r5k1/5pp1/1P5p/3Pp3/1br5/P4N1P/5PP1/3R2K1 w - - 0 34 | b7 | Is the move from f3 to h4 legal? | Yes | legality |
r6r/pN1nkpp1/1qp1pn1p/7P/8/1Q6/PPPN1PP1/2KR3R w - - 2 19 | Qa3+ | What piece is on h8? | Black Rook | occupancy |
3r4/pp2kpp1/2p1p2p/4n3/4N3/1PP2P2/P5PP/3R1K2 w - - 7 28 | d3e5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
4rr2/1p3qk1/2p3pp/p2p2B1/3P4/5P2/PP4Pb/1B1RRQ1K b - - 0 34 | Bg3 | Is the move from h2 to d6 legal? | Yes | legality |
r1bqkb1r/pppp2pp/2n5/4p3/4N3/5Q2/PPPP1PPP/RNB1K2R w KQ - 2 8 | d3 | Identify any Black knight outposts on the board. | None | outposts |
r3kb1r/1p1nnpp1/1qp1p3/p2pPb1p/P2P3P/1NP3P1/1P2BP2/R1BQK1NR b KQkq - 0 10 | Ng6 | Are there any open files in this position? | No | files |
rnbqkbnr/5ppp/p2pp3/1p6/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq - 0 7 | Bf3 | Does Black have any isolated pawns? | No | structure |
8/5p2/4p1p1/1k2P2n/p6P/B4K1P/8/8 b - - 3 53 | Kc4 | Is the f-file open, semi-open, or closed? | semi-open for White | files |
1r3rk1/ppp5/2pbb3/N5pp/4P3/2q2N2/PPP2PPP/R4RK1 w - - 0 20 | bxc3 | Is the move from a5 to c6 legal? | Yes | legality |
r3kb1r/pp3ppp/q3P3/3pP3/3P4/P4N2/1n1BKP1P/R2Q1R2 w kq - 0 16 | d3b2 | Is the White king in check? | Yes | check |
2r2rk1/5pq1/b3p2p/pN2P3/1b1Q1p2/5B2/PP4PP/3R1R1K w - - 2 23 | a4 | Is the move from a2 to a4 legal? | Yes | legality |
7r/2r1qk1p/3Rb1pQ/1BpR1p2/4p1P1/2P5/1P3P1P/6K1 w - - 5 33 | Bc4 | Is the move from b5 to d3 legal? | Yes | legality |
6k1/6pp/p5b1/2pR4/1p3b2/1P3P2/P3r1PP/K3N2R b - - 2 32 | Bd2 | Is the White king in check? | No | check |
2bq1rk1/r1p1npbp/1n1p2p1/pp6/1P1PPNP1/PNP4P/5RB1/2BQ1RK1 b - - 4 13 | Nc4 | Identify any Black knight outposts on the board. | None | outposts |
r2q1rk1/1b3p1p/pp1b1np1/3p4/3N4/2NQP3/PP1B1PPP/2R2RK1 w - - 0 16 | Nf3 | Is the move from e3 to g3 legal? | No | legality |
3r1bk1/p1q2pp1/1n2r1p1/1R1p4/3B2P1/2PQ1N1P/P4PK1/1R6 w - - 11 24 | Ra5 | Is the move from d4 to e5 legal? | Yes | legality |
4k2r/1p1bqpp1/pb2p3/3pPnN1/PP1p1P1p/2BB4/2P1Q1PP/R1R4K b k - 0 20 | dxc3 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
3q1rk1/3bppbn/3p2p1/1pr3B1/p1BNPP1P/2N5/PPPQ4/1K1R3R b - - 0 21 | Rxc4 | What piece is on d2? | White Queen | occupancy |
r2qkb1r/5pp1/1np1pnp1/1p1p4/3P2P1/1QN1P2P/PP1B1PB1/R4RK1 w kq - 4 15 | a4 | Does White have any isolated pawns? | No | structure |
1r2kb1r/3n1pp1/pp5p/2p3q1/2P5/1QB1P2P/PP3PBP/3R1RK1 b k - 1 21 | a1d1 | What is the material balance in this position? | White is up 1 pawn of material | material |
8/1p3k2/p7/2pq2pp/P3R3/1P3PPP/3r3K/8 w - - 1 43 | d1d2 | What is the material balance in this position? | Black is up 9 pawns of material | material |
r5k1/p4ppp/2np4/3q4/2PPr3/5N2/P2Q2PP/2R2RK1 b - - 0 18 | Qh5 | Is the Black king in check? | No | check |
r4R1k/pp1qn1b1/3p3p/3Pp3/4P1n1/2NNB3/PP4P1/2RQ2K1 b - - 0 21 | Bxf8 | Does White have any passed pawns? | No | structure |
r1bq1rk1/4ppbp/p2p1np1/1PpPn3/4P3/2N1BPN1/PP4PP/R2QKB1R w KQ - 0 11 | a4 | Identify any White knight outposts on the board. | a6 | outposts |
4b3/1p4bp/1pp1k1p1/4np2/1NP1p3/1P6/r4PPP/3B1RK1 w - - 0 26 | Nxa2 | What piece is on e8? | Black Bishop | occupancy |
r4rk1/pp4pp/4b3/7q/2QbpB1P/6P1/PP3P2/R1R3K1 w - - 2 20 | Qxd4 | Identify any Black knight outposts on the board. | d3 | outposts |
rn1q1bnr/pppk3p/3pp3/7Q/3PPB2/8/PPP3PP/RN2K2R w KQ - 2 10 | O-O | Does Black have any isolated pawns? | Yes: h7 | structure |
2rqrk2/3b1pp1/4p3/p1bpP1NQ/1n6/8/1PP1NPPP/3R1RK1 b - - 7 22 | Qe7 | Is the move from d7 to h6 legal? | No | legality |
r3kb1r/2pbnppp/p2p1q2/1p5Q/4P3/1BN5/PP3PPP/R1B1R1K1 b kq - 2 12 | g6 | Identify any Black knight outposts on the board. | None | outposts |
r3k2r/2pb1p2/p1pb1q2/4p1pp/BP2P3/2NR2Q1/P1P2PPP/3R3K w kq - 0 19 | Ne2 | What is the material balance in this position? | Equal | material |
8/2pk2p1/1p6/p1n1PK2/8/PP6/2R5/8 b - - 2 39 | Nxb3 | Does White have any isolated pawns? | Yes: e5 | structure |
r1br2k1/pp2bppp/3ppn2/nN4B1/N3PP2/8/PPP3PP/2KR1B1R w - - 0 13 | e5 | Is the move from b2 to b3 legal? | Yes | legality |
3r2k1/2p2p1p/2p1b1p1/p1q2p2/8/P1N1P3/R1QP1P1P/4K1NR b K - 0 20 | e2e3 | Identify any Black knight outposts on the board. | h5 | outposts |
8/8/K3N3/8/7p/5k2/8/8 b - - 1 4 | Kg4 | Is the move from f3 to c5 legal? | No | legality |
6k1/5pp1/4r3/1p3q1p/3QB1n1/2N3Pb/5P1P/4R1K1 b - - 0 32 | g6 | Is the move from h3 to f1 legal? | Yes | legality |
r1bqkb1r/ppp4p/2n3N1/3n3Q/2BPp3/8/PPP2PPP/R1B1K2R b KQkq - 0 9 | Nf6 | Are there any open files in this position? | No | files |
3k4/5R2/n2B4/pb1p3p/7P/2r3n1/P3r3/3K4 w - - 7 38 | e3e2 | Identify any Black knight outposts on the board. | c4, e4 | outposts |
2r5/2P2p2/5Pk1/p7/PpRK4/8/8/8 b - - 4 66 | Kxf6 | What piece is on c6? | Empty | occupancy |
3r4/5kpp/2r1nN2/p1b1p3/4P1Q1/7P/PPP3P1/R6K w - - 1 29 | Nxh7 | Identify any White knight outposts on the board. | None | outposts |
2rq1rk1/1p1b1p1p/p4n2/2n2PP1/2B5/2N1Q3/PPP2P1P/2KR4 w - - 6 19 | gxf6 | What piece is on b4? | Empty | occupancy |
rr3q2/7k/p5Bp/8/3Q4/4PN2/2P5/2KN2R1 b - - 2 34 | f7g6 | Is the Black king in check? | Yes | check |
r3k2r/pp3b2/1qn2p2/1BQp1P1p/2P1p3/7P/PP4P1/K2R2NR w kq - 1 26 | Qd6 | Does Black have any isolated pawns? | Yes: h5 | structure |
r1bqk1nr/pppp1Qbp/4p1p1/4N3/2Bn4/8/PPP2PPP/RNB1K2R b KQkq - 1 8 | f3f7 | Is the Black king in check? | Yes | check |
r1bq1rk1/ppp2ppp/2nbpn2/8/2BP4/2N1PN2/PPQB1PPP/R3K2R b KQ - 2 9 | e5 | What is the material balance in this position? | Equal | material |
rnb2rk1/pp1p1pp1/8/4P2Q/4NP2/4p3/P1q3PP/5RK1 w - - 0 17 | Qf5 | Identify any White knight outposts on the board. | d6 | outposts |
6k1/1p2qp2/p1rp2p1/4p2p/2P1P3/1P1Q2P1/P4PKP/3R4 w - - 0 26 | h4 | What piece is on f5? | Empty | occupancy |
r3r1k1/2q2ppp/p1N4Q/2nP4/2p1P3/1p3P2/PPB4P/2KR2R1 b - - 1 23 | d2h6 | What is the material balance in this position? | White is up 3 pawns of material | material |
8/8/1b6/2k5/1p6/1K6/5p2/5B2 w - - 0 98 | b5b4 | What is the material balance in this position? | Black is up 2 pawns of material | material |
1r3rk1/5p1p/2pb4/1p1n1bp1/3PR3/1BP3P1/1P1N1P1P/R1B2K2 b - - 2 20 | Rfe8 | What piece is on f2? | White Pawn | occupancy |
r3r1k1/pp2qppp/1bn5/3p4/N3n1b1/1P2PNPP/PB3PB1/2RQ1RK1 b - - 0 16 | Nxf2 | Is the c-file open, semi-open, or closed? | open | files |
2rq2k1/p3Bppp/1p6/3n4/8/4R1P1/P4PBP/R2b2K1 w - - 0 22 | Rxd1 | What piece is on f3? | Empty | occupancy |
2r5/1b6/1n2Nrpk/p7/1P2p2p/1BP1R2P/6P1/3R2K1 w - - 0 43 | Rd6 | Identify any Black knight outposts on the board. | None | outposts |
r2q1rk1/1b2bppp/ppn1pn2/8/3P4/P1NQ1N2/1PB2PPP/R1B1R1K1 w - - 0 14 | d5 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
r4r2/p4p2/1p3Pk1/2pp2p1/3P3R/2P1Q2P/P1P3P1/1R4K1 w - - 2 23 | Rg4 | Does Black have any passed pawns? | No | structure |
1r3b2/3bnpk1/B4npp/pNp1p3/P1P5/4B1PP/4PP1N/1R4K1 b - - 6 27 | Bc8 | Does White have any isolated pawns? | Yes: a4, c4 | structure |
8/2R2p1k/p3R2p/3pP3/3P2r1/5QP1/q5rK/8 w - - 0 43 | b2g2 | Is the White king in check? | Yes | check |
5bk1/7p/4p1p1/pp1p1p2/n1pP1P2/2P2PP1/PPN4P/2B1K3 w - - 0 32 | a3 | What piece is on b2? | White Pawn | occupancy |
r2q1k2/pp4bp/3prpp1/8/2Q5/8/P4PPP/R2R2K1 w - - 0 29 | Qxe6 | What piece is on h1? | Empty | occupancy |
1Q6/p3ppkp/3p2p1/4P3/5nP1/q4N1P/5P1K/5N2 b - - 0 30 | Qxf3 | What is the material balance in this position? | White is up 1 pawn of material | material |
r2r2k1/pbq2pbp/1p4p1/n1p2P2/3P4/2PBB3/P3N1PP/2RQ1R1K w - - 1 17 | Qd2 | What is the material balance in this position? | Equal | material |
r1b2rk1/pp2b1pp/2p2p2/P2pP3/5P1q/3QB3/1PPN2PP/R4RK1 w - - 0 15 | Qc3 | What is the material balance in this position? | Equal | material |
r1b1k2r/pp1n1p2/7p/2Pp2p1/1b2n3/2N1P1B1/qPQ1NPPP/2R1KB1R w Kkq - 0 13 | Kd1 | What piece is on c1? | White Rook | occupancy |
r2q1r1k/1pp1bppp/pnn5/3p3b/3PP3/1B2BN1P/PP1N1PP1/R2QR1K1 w - - 0 15 | e5 | Is the move from d1 to c2 legal? | Yes | legality |
5rk1/3qb1pp/1p2b3/1Pp1P3/3PpP2/2B4P/r2QB1P1/2R2RK1 w - - 1 27 | a8a2 | What is the material balance in this position? | White is up 1 pawn of material | material |
2kr3r/1p6/p1n1p3/3nB3/2R2PP1/3B1QKP/q7/1R6 w - - 3 40 | Rxc6+ | What piece is on a8? | Empty | occupancy |
8/1p6/pkR5/2p5/8/P7/1PP5/2K5 b - - 0 42 | d6c6 | Is the Black king in check? | Yes | check |
r1bqr1k1/pppnbppp/4p3/6B1/3PQ3/3B1N2/PPP3PP/R4RK1 b - - 0 11 | Bxg5 | Are there any open files in this position? | No | files |
r1nq1rk1/1p3ppp/2p5/2Pp1Q2/p1NP4/P7/1P3PPP/2R1R1K1 w - - 0 21 | Ne5 | What is the material balance in this position? | Equal | material |
r2q1rk1/2p1bppp/p2p1n2/np2p3/3PP1b1/1BP1BN2/PP3PPP/RN1QR1K1 w - - 3 11 | Bc2 | Is the White king in check? | No | check |
5rk1/p4p1p/6p1/6q1/3P4/1P6/PB1N1P2/2R2R1K b - - 3 27 | Qxd2 | Identify any Black knight outposts on the board. | f5, h5 | outposts |
r2q4/pbp5/1p2pP2/6P1/1k1nQ3/P1N5/5PP1/2B2K2 b - - 0 25 | a2a3 | Is the Black king in check? | Yes | check |
8/1p6/p3k3/3p1p1p/P2P3P/1r1KP1R1/8/8 w - - 2 42 | b4b3 | Is the White king in check? | Yes | check |
2rr2k1/Q4R1p/6p1/4b3/2p1N3/2Pn4/P6P/7K w - - 2 31 | Ng5 | Identify any Black knight outposts on the board. | f5, h5 | outposts |
3r1rk1/1pp2ppp/p1n5/4P3/Q7/P2qPP2/1PRB1P1P/3K3R b - - 2 19 | Nd4 | Identify any White knight outposts on the board. | None | outposts |
r1b2r2/pp1pb1pk/3qp3/2pnN1BQ/8/2P5/PP3PPP/R3K2R b KQ - 1 14 | Kg8 | Is the Black king in check? | Yes | check |
8/2k1rp1p/2Bq2p1/P7/8/5K2/1Q4PP/7R b - - 0 36 | Qxc6+ | Does Black have any isolated pawns? | No | structure |
r2q1rk1/pp1n1ppp/2pbpn2/3p4/2PP2b1/1P3NP1/PB1NPPBP/R2Q1RK1 b - - 2 9 | Bh5 | What piece is on e6? | Black Pawn | occupancy |
6k1/5p2/4p1pp/4P3/8/6qP/4rbB1/3Q1R1K b - - 5 35 | Qxe5 | Does White have any isolated pawns? | Yes: e5, h3 | structure |
r1bqkb1r/1pp2ppp/p1p2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq - 2 6 | Nxe5 | What is the material balance in this position? | Equal | material |
r1b1kb1r/p2p1pp1/7p/Qp3n2/5Bq1/5RP1/PPP1PP2/R3KB2 w Qkq - 0 14 | Rd3 | Is the move from a5 to b5 legal? | Yes | legality |
1r2b3/5pP1/p3pP1k/4P3/6P1/1Pp5/2P5/1K6 w - - 0 32 | g8=Q | Identify any White knight outposts on the board. | a4, c4, h5 | outposts |
rnbqkb1r/pp1p1ppp/4p3/2pnP3/8/2N2N2/PPPP1PPP/R1BQKB1R w KQkq - 0 5 | Ne4 | Is the move from f1 to c4 legal? | Yes | legality |
r1bqkbnr/1p1Bpppp/p2p4/8/3QP3/5N2/PPP2PPP/RNB1K2R b KQkq - 0 6 | Bxd7 | Is the Black king in check? | Yes | check |
b3qnk1/6p1/pr1p1bp1/1ppPp2p/2P1P3/3BN3/PP2QPRP/1K4R1 b - - 8 29 | Rb8 | What piece is on b1? | White King | occupancy |
6rk/R3R1p1/6Bp/p6P/5K2/8/8/2r5 w - - 3 40 | Rxa5 | Is the g-file open, semi-open, or closed? | semi-open for White | files |
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