fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
8/pp5R/1kp2p2/3p4/6P1/1P6/6r1/1r2K3 w - - 0 39 | a1b1 | Is the White king in check? | Yes | check |
3bk2r/p2n1ppp/4pn2/8/1B6/4P3/PP3PPP/R1R3K1 b k - 0 21 | Nd5 | Is the move from f6 to g4 legal? | Yes | legality |
4kb1r/5ppp/2Np3q/3PpQ2/8/6PK/7P/8 w - - 5 36 | d2h6 | Is the Black king in check? | No | check |
5k2/3b4/1p1pp1p1/3Pn2p/2P1Pb1P/5P2/3qBP2/4NKRQ w - - 0 36 | Rg3 | What is the material balance in this position? | White is up 3 pawns of material | material |
6k1/Qp4p1/p4p1p/P2P1P2/2P1n3/1P4PP/4q3/R5K1 b - - 3 34 | Ng5 | Does White have any passed pawns? | Yes: d5 | structure |
rnbqkbnr/ppp2ppp/8/4P3/2Pp4/8/PP2PPPP/RNBQKBNR w KQkq - 0 4 | e3 | Is the e-file open, semi-open, or closed? | semi-open for Black | files |
6r1/pp3k1p/7r/3QPq1n/7P/2B2Pp1/PP4K1/2R2R2 b - - 0 31 | Re6 | Identify any Black knight outposts on the board. | None | outposts |
r2qkb1r/pp3ppp/2n3b1/4p1P1/4N3/5N1P/PPPPBP2/R1BQK2R b KQkq - 0 10 | c3e4 | What is the material balance in this position? | White is up 4 pawns of material | material |
8/2Q5/3p2k1/5bp1/2B3q1/8/5P2/5K2 b - - 7 49 | Qd1+ | Is the f-file open, semi-open, or closed? | semi-open for Black | files |
6Q1/8/p1p5/7K/8/3k3P/P3p3/8 b - - 0 47 | e1=Q | What piece is on f4? | Empty | occupancy |
1r4r1/5p1k/p2p1q1p/2b1nPpQ/p7/6RP/BBR2PPK/8 b - - 4 30 | Rge8 | What piece is on e2? | Empty | occupancy |
r1bq1rk1/pp3nbp/3p2p1/1P3p2/5P2/6P1/PB3PBP/RN1Q1RK1 w - - 1 15 | Bxg7 | Is the White king in check? | No | check |
6k1/p4ppp/1ppr1B2/8/1PP5/P4B2/5PPP/4R1K1 b - - 0 30 | g5f6 | What is the material balance in this position? | White is up 6 pawns of material | material |
6k1/pp4np/2prb3/5p2/5P2/2N5/PPB2KPP/5R2 w - - 0 25 | Ke3 | What piece is on b2? | White Pawn | occupancy |
r1bq1rk1/pp5p/n1pp2p1/5p2/2P5/BP3NP1/P3PPBP/b2Q1RK1 w - - 0 14 | Qxa1 | Is the move from h2 to a3 legal? | No | legality |
r1bq2k1/pp3pbp/2n2np1/2Pp4/3N4/2N1QP2/PP2B1PP/R4RK1 b - - 0 14 | Qf8 | Is the Black king in check? | No | check |
r5k1/2qpn1bp/b1p1p1p1/p3P3/Bn3B2/1PN4P/2P1QPP1/R3R1K1 w - - 1 19 | b7a6 | What is the material balance in this position? | White is up 2 pawns of material | material |
4k2r/2b2pp1/b2p4/q3pPP1/1p1nP3/1P6/2PQ1BB1/3NR1K1 b k - 2 28 | Rh5 | Is the move from f7 to f6 legal? | Yes | legality |
r3kb2/pb6/7r/2p1pPp1/Ppp1q1p1/4N1B1/1P2QPPP/R4RK1 w q - 2 23 | Qxc4 | Is the e-file open, semi-open, or closed? | semi-open for White | files |
8/8/K2p1k2/3P1p2/3r4/5R2/P7/8 b - - 0 36 | Ke5 | Does Black have any isolated pawns? | Yes: d6, f5 | structure |
r2qk2r/1pp2pp1/p1npbn1p/2b1p3/P1B1P3/2NPBN2/1PP2PPP/R2Q1RK1 w kq - 2 9 | a5 | Is the move from e3 to d4 legal? | Yes | legality |
R7/P6k/8/r4K2/7P/8/8/8 w - - 7 56 | a4a5 | Is the White king in check? | Yes | check |
8/5ppk/ppn1r2p/2p5/2P3PN/PP1RP2P/4KP2/8 b - - 4 42 | f3h4 | What is the material balance in this position? | White is up 1 pawn of material | material |
r4rk1/6pp/4pp2/1p1p1P2/8/1R4R1/2Pn2PP/1K6 w - - 1 28 | c4d2 | Is the White king in check? | Yes | check |
r4r2/1p1bqpk1/4p1pp/3pP3/p1nN3P/2P2NQ1/PP3PP1/1R2R1K1 w - - 2 22 | Ne2 | Identify any White knight outposts on the board. | None | outposts |
3b1rk1/5p1p/1p1p2p1/p1nPpP1q/P1Q5/3B1RP1/2P3KP/5R2 b - - 11 35 | g5 | Does White have any isolated pawns? | Yes: a4 | structure |
2r5/1Pk3pp/K3b3/pBB1Pp2/8/2P5/PP4PP/7q w - - 4 26 | Bf2 | Does White have any isolated pawns? | Yes: e5 | structure |
rnbqkbnr/ppp2ppp/8/4P3/4p3/2N5/PPP2PPP/R1BQKBNR b KQkq - 0 4 | Qxd1+ | Does White have any isolated pawns? | No | structure |
7k/1b3pp1/pN1qpn1p/2P5/1P2P3/5P2/6Pb/3R1B1K w - - 0 33 | cxd6 | Identify any White knight outposts on the board. | a5, c5 | outposts |
r6k/p4p2/3b2p1/3Pp1q1/1pQ3Pn/6PP/PP6/4R1RK b - - 0 30 | Nf3 | Does Black have any passed pawns? | Yes: e5 | structure |
r1bq1rk1/ppn1ppbp/5np1/8/2Pp4/1BN2N1P/PP3PP1/R1BQR1K1 w - - 0 14 | Nxd4 | Does White have any passed pawns? | No | structure |
r3kbnr/pp1npppp/2p5/q2pP3/3P4/3Q1N2/PPP2PPP/RNB1K2R w KQkq - 1 7 | d8a5 | Is the Black king in check? | No | check |
8/5p1p/1R4k1/6p1/6P1/r3P2P/5P2/6K1 b - - 0 46 | f6 | Does Black have any passed pawns? | No | structure |
r2q1rk1/pbn3pp/2p1p3/2ppPp2/1b1P4/PP1BPN2/1B2Q1PP/R4RK1 b - - 0 17 | c4 | Does Black have any isolated pawns? | Yes: a7 | structure |
5r2/3k1P1p/r2p4/4pQ2/1p1pP2P/3P4/1qPK3R/5B2 b - - 3 37 | g5f5 | Is the Black king in check? | Yes | check |
1r3rk1/p5pp/4np2/2p5/8/P1B1P3/2R2PPP/3R2K1 b - - 3 23 | Rb3 | Identify any Black knight outposts on the board. | None | outposts |
r1b2rk1/p1p3pp/2pb1q2/3p4/6n1/1P2PN1P/P1PP2P1/RNBQ1RK1 w - - 1 11 | Nc3 | What is the material balance in this position? | White is up 1 pawn of material | material |
Q1bq3k/p5bp/1n2P1p1/1pp5/5rn1/2N2N2/PP2B1PP/R3K2R w KQ - 1 17 | Qc6 | What is the material balance in this position? | White is up 2 pawns of material | material |
5r1k/pp3ppb/4p2p/P1r1N3/5P2/1P6/6PP/3RR2K w - - 0 28 | Nd7 | Is the Black king in check? | No | check |
8/2k5/2p5/8/7r/1R1N3r/1PK5/8 b - - 21 57 | Rh2+ | Are there any open files in this position? | Yes: a, d, e, f, g, h | files |
r4rk1/2pqbpp1/p1n4p/P2Bp3/1pN1P1n1/3PPN2/1PP3P1/R2QR1K1 b - - 3 17 | Bd6 | Identify any White knight outposts on the board. | None | outposts |
8/8/8/6R1/7p/5k1P/8/1r4K1 w - - 3 54 | b7b1 | Is the White king in check? | Yes | check |
5rk1/1p3p1p/1n4p1/p7/P3p2B/4P3/4BPPP/2N3K1 b - - 0 25 | Nxa4 | Is the move from b6 to c4 legal? | Yes | legality |
r1b2rk1/p1p2ppp/2B5/8/1Q6/3q1Nn1/1P3PPP/R4K1R w - - 5 17 | Kg1 | Is the White king in check? | Yes | check |
r4rk1/p1p2ppp/4p1b1/1N2q3/P2p4/3P3P/1P2Q1P1/R3K2R b KQ - 1 19 | d1e2 | What is the material balance in this position? | Black is up 2 pawns of material | material |
4r3/k1pR4/2PB2p1/b6p/8/6P1/5P1P/5K2 b - - 2 36 | Kb6 | What piece is on h5? | Black Pawn | occupancy |
r1b1r1k1/p2p1pbp/2pB2p1/6N1/n3n1PP/4P3/PP3N2/1K1R1B1R w - - 0 23 | Ngxe4 | What piece is on f4? | Empty | occupancy |
r2qr1k1/p1p2p2/1pn1b1BQ/3pP1N1/3P4/2P5/P1P3PP/1R3RK1 b - - 0 16 | fxg6 | Are there any open files in this position? | No | files |
r2k4/pp5R/2p3p1/2qpb1P1/6B1/1PP1n2Q/P4r2/1N1K4 w - - 0 27 | c2e3 | Is the Black king in check? | No | check |
8/3R2pp/1N3pk1/8/8/1rn3P1/5P1P/5K2 b - - 0 32 | Rxb6 | Identify any Black knight outposts on the board. | None | outposts |
4q1k1/1pp1rp1n/1n1p1bp1/1P1P4/1P3Pp1/3QBB2/7P/2RN3K w - - 0 37 | Bxg4 | What piece is on g1? | Empty | occupancy |
r3kbnr/p3pppp/2p1q3/2p5/8/3P1PP1/PPP4P/RNBQK2R w KQkq - 1 9 | h3e6 | Is the White king in check? | Yes | check |
8/3k1p2/1R2b1p1/r6p/3B1K1P/2P3P1/5P2/8 b - - 0 49 | Rf5+ | What piece is on a5? | Black Rook | occupancy |
8/6p1/5pk1/1R5p/8/1p2PKPP/1r6/8 b - - 1 4 | Rb1 | Does White have any passed pawns? | No | structure |
r2q1rk1/pb4bp/3p2pn/3Pp3/5p2/NQPB4/1P3PPP/R1B2RK1 b - - 1 19 | Rb8 | Is the c-file open, semi-open, or closed? | semi-open for Black | files |
6k1/5pp1/r6p/2P5/1p5P/1Q4P1/1P3PK1/2r5 b - - 0 34 | Rxc5 | What piece is on b7? | Empty | occupancy |
2k3r1/1pq2p2/p1bPp3/n2p4/P4PPn/3Q3P/2P1N3/R3KB1R b KQ - 0 20 | Qxd6 | Is the move from f7 to g1 legal? | No | legality |
1n1qk2r/3pbppp/2p1p3/1p2P3/r2P4/2PQ4/P2N1PPP/R1B2RK1 b k - 3 15 | d5 | Is the White king in check? | No | check |
1Q6/8/5p2/R4Pp1/3p1kr1/8/3K4/8 b - - 3 55 | a8b8 | What is the material balance in this position? | White is up 7 pawns of material | material |
1r4rk/1b2np1p/pq3p1Q/1p6/3Np1BP/2P4R/1P3PP1/2KR4 w - - 8 24 | Ne6 | What piece is on g1? | Empty | occupancy |
1rq2r1k/2nbn1b1/p2P2pp/Pp1Pp3/2P1PpP1/4N1BP/2QNBP2/R3K2R b KQ - 0 25 | fxe3 | Is the move from c7 to d5 legal? | Yes | legality |
5rk1/3r2pp/p1q5/1pp5/8/2P1NP2/PP2Q1KP/R5B1 b - - 7 27 | Rd2 | Identify any Black knight outposts on the board. | None | outposts |
rn4k1/pppb1ppp/8/3P4/2BP1N2/2N5/PP3qP1/3RR2K b - - 0 17 | Qxf4 | Is the White king in check? | No | check |
5rk1/p2Bn3/1p2P2p/1P3rp1/P2bp3/4B2P/4RPP1/6K1 w - - 0 33 | Bxd4 | Is the move from f2 to f4 legal? | Yes | legality |
3r1rk1/pb4p1/2p2p2/5N1p/Np2P1n1/4B3/PP4Pq/R2RKQ2 b - - 1 23 | Nxe3 | Are there any open files in this position? | Yes: d | files |
r2qr1k1/pbpn1pp1/1p1b1n1p/3p1B2/3P4/1P2PN2/PB1N1PPP/2RQ1RK1 w - - 0 13 | Bh3 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
8/3q2rk/2ppp2p/Rp2p3/1P2P1PP/2PQ1P1K/8/8 w - - 0 77 | c4 | Identify any Black knight outposts on the board. | None | outposts |
6k1/pp4p1/5b1p/1q1p3Q/2rP4/P7/P2R2PP/K6R w - - 4 24 | Rhd1 | Does Black have any isolated pawns? | Yes: d5 | structure |
r1q1r1k1/1ppbnpp1/3p1n2/2PPp2p/p3P1P1/P4P1P/1PQNN1B1/R4RK1 b - - 0 16 | Bb5 | Does White have any passed pawns? | No | structure |
r4r2/p1n1pkb1/2pp4/1p3BP1/2qP4/P1N1p3/1PQ2P2/2KR3R w - - 0 25 | b3 | Is the move from f2 to b6 legal? | No | legality |
6k1/3p2pp/3Nb3/p7/1r6/3p4/1P1R1PPP/4R1K1 w - - 2 31 | Rxd3 | Is the move from d2 to f1 legal? | No | legality |
r6k/pp2q2p/3N2pb/PN1Pp3/1P2Prb1/3Q4/6PP/2R1R1K1 b - - 0 24 | Raf8 | What piece is on g3? | Empty | occupancy |
1r2r1k1/2qbbppp/ppnppn2/8/P3PP2/1NN1BB2/1PPQ2PP/R4R1K w - - 0 15 | g4 | Are there any open files in this position? | No | files |
8/8/1p6/p2p3p/PP3k2/2PK3p/7P/8 w - - 2 47 | bxa5 | Is the White king in check? | No | check |
r3r1n1/q4ppk/1bp1b2p/2p2N2/2PpP2N/1P1P3P/2RBQ1P1/1R4K1 b - - 1 28 | Qb8 | Does Black have any passed pawns? | No | structure |
5rk1/ppqb3p/2pb2p1/3p1pB1/3P3Q/2PBR3/P1P2PPP/6K1 b - - 0 16 | b5 | Does Black have any isolated pawns? | No | structure |
1r3n1k/p4R2/4pP1P/3pP3/3P4/1p6/8/2B4K b - - 1 44 | b2 | What is the material balance in this position? | Equal | material |
8/pp2kb2/1p1qP2B/3P4/8/2PQ2KP/8/8 w - - 1 38 | a3d6 | Is the White king in check? | Yes | check |
3k4/5P2/8/p3N1N1/P7/3K4/7p/5r2 w - - 0 74 | Nef3 | Is the move from d3 to b7 legal? | No | legality |
5r2/Q3qp2/p2k2pp/8/B5PP/2P5/PP3P2/3K4 w - - 4 39 | Qb6+ | Identify any White knight outposts on the board. | d4 | outposts |
rnbqk2r/ppp2ppp/4pn2/1N6/3P4/5N2/PPPb1PPP/R2QKB1R w KQkq - 0 8 | b4d2 | Is the White king in check? | Yes | check |
b5rk/p3ppbp/1p1p4/4nPQ1/2P1q3/4B2P/P1P1BR1K/6R1 b - - 8 25 | Ng4+ | Is the move from e4 to g3 legal? | No | legality |
r1bq1rk1/5pp1/2nb1n1p/pp1pN3/2pP3B/2P4P/PPB2PP1/RN1QR1K1 b - - 1 15 | Ra6 | Is the e-file open, semi-open, or closed? | open | files |
4r3/pp2r2p/2pk4/5PN1/2P5/5B2/PB3PPP/3R1RK1 b - - 4 24 | a1d1 | Is the Black king in check? | Yes | check |
r4rk1/2p1qpp1/2p1pn1p/p3N3/P2P4/4P1P1/1P1Q1PBP/R5K1 b - - 1 18 | Qd6 | Is the move from g8 to h8 legal? | Yes | legality |
Bn3rk1/p4ppp/1p2p3/8/3P3q/P1P5/3B2PP/1R1Q1bK1 w - - 0 20 | Qxf1 | Identify any White knight outposts on the board. | None | outposts |
r1bqkb1r/ppp2ppp/2n1pn2/3p4/3PP3/5N2/PPPN1PPP/R1BQKB1R w KQkq - 4 5 | e5 | What piece is on g8? | Empty | occupancy |
r3k2r/ppp2ppp/2b1pn2/8/1nNP4/4P1P1/PP1NKPBP/R6R w kq - 5 14 | f3 | Are there any open files in this position? | No | files |
r3r2k/2p5/1p2B1R1/p2pqn1P/7Q/P4p2/1PP5/1K2R3 w - - 5 33 | Rh6+ | Is the d-file open, semi-open, or closed? | semi-open for White | files |
8/1kp5/2b5/1pP1p3/4P3/4B1Q1/2qr2PK/4R3 b - - 9 43 | Re2 | Is the Black king in check? | No | check |
r1bq1k1r/ppp5/8/4P1p1/4Q2p/2P1P3/P4PPP/R3K2R w KQ - 0 17 | f4 | Is the move from h1 to f1 legal? | Yes | legality |
r1r3k1/1p2bp2/p2p3p/3PpN2/2P1P1q1/1B4P1/P2B1P2/2R2RK1 w - - 0 32 | Nxh6+ | Is the Black king in check? | No | check |
5Rrk/p1p3q1/1p1pP3/n7/3Q4/P1P5/4N3/4K3 w - - 9 39 | e7 | Does Black have any isolated pawns? | No | structure |
2k5/ppp4p/2n5/1n1N2B1/3P4/2P2PPK/P1r5/R7 w - - 0 29 | Re1 | Is the g-file open, semi-open, or closed? | semi-open for Black | files |
4qr1k/1pp1r3/p2pp2p/6pP/PP2PpNn/2PP3K/R4P1N/3QR3 w - - 4 32 | e5 | Is the move from e1 to g1 legal? | Yes | legality |
r1b1r1k1/pp3ppp/1npb4/5p2/3P4/3BP3/PP1BNPPP/R1R3K1 b - - 0 16 | a5 | Is the c-file open, semi-open, or closed? | semi-open for White | files |
rnbqkbnr/p3pppp/3p4/2pQ4/4P3/5N2/PPP2PPP/RNB1KB1R b KQkq - 1 5 | Bb7 | Is the b-file open, semi-open, or closed? | semi-open for Black | files |
2r2knr/4b1p1/p2pb1Q1/5P2/1q2P3/1Pp1B3/P1P5/1K1R2R1 w - - 0 25 | fxe6 | What is the material balance in this position? | Black is up 5 pawns of material | material |
1q2r1k1/1b3rbp/p2pp3/6P1/Pn2P2R/1NN1n3/1PPQ2BP/3R2K1 w - - 0 34 | Qxe3 | What piece is on g4? | Empty | occupancy |
k5r1/p3Rp2/5P2/2p5/1p1q1P2/1P3P1K/P3Q3/8 b - - 6 41 | Rh8+ | Identify any Black knight outposts on the board. | d4 | outposts |
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