fen stringlengths 28 76 | move stringlengths 2 7 | question stringlengths 20 48 | answer stringlengths 2 34 | task_type stringclasses 7
values |
|---|---|---|---|---|
rnbqkb1r/ppp2ppp/4pn2/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq - 1 5 | Bg5 | Is the move from d1 to h5 legal? | Yes | legality |
r1b2rk1/1pp2ppp/1p1n1q2/1B1pR3/3P4/2P2P2/PP4PP/R1BQ2K1 w - - 1 15 | Bf1 | Identify any Black knight outposts on the board. | None | outposts |
r2q1rk1/1bpn1pbp/pp1p1np1/4p3/P2PP3/2NBBN1P/1PPQ1PP1/R4RK1 w - - 0 11 | Rad1 | What piece is on h2? | Empty | occupancy |
r1bqr1k1/pppp1ppp/2n5/3PpQ2/1b6/4PN2/PP1P1PPP/R1B1KB1R b KQ - 0 8 | d6 | Identify any White knight outposts on the board. | None | outposts |
rq2r1k1/1b1n1ppp/2pb1n2/1p6/1P1NP3/1QN1B1P1/4BP1P/2RR2K1 b - - 0 21 | Ne5 | Is the a-file open, semi-open, or closed? | open | files |
2brr1k1/pp1n2pp/2p1pP2/q1Pp3P/5B2/5BP1/PPQ1PP2/2RR2K1 b - - 0 21 | e5 | Is the d-file open, semi-open, or closed? | semi-open for White | files |
rnbq1rk1/ppp2ppp/4pn2/3p2B1/2PP4/P1Q5/1P2PPPP/R3KBNR b KQ - 2 7 | c5 | What piece is on e1? | White King | occupancy |
r1r3k1/q3bppp/4bn2/3p4/1P2p3/P1N3B1/2B1QPPP/R2R2K1 w - - 4 23 | Nb5 | Does Black have any passed pawns? | Yes: d5 | structure |
3rr1k1/pbpn1ppp/8/2p5/2P1N3/1P4P1/P4PBP/3RR1K1 w - - 0 22 | Nxc5 | Is the d-file open, semi-open, or closed? | open | files |
3k4/1p5p/p5r1/2R1Bp2/Pn2p3/6P1/4KP1P/8 w - - 0 30 | Bc3 | Is the g-file open, semi-open, or closed? | semi-open for Black | files |
4r3/P4pkp/4p1p1/8/8/b5P1/4PP1P/1R4K1 w - - 0 5 | Rb8 | Does White have any passed pawns? | Yes: a7 | structure |
r1bq2k1/p5bp/3p1nnr/P1pPp3/2P1Pp2/1NN2R1P/4B1P1/1R1QB1K1 b - - 0 24 | Nh8 | Is the Black king in check? | No | check |
5R2/2pb2pk/5n1p/5p2/2PPpP1P/4P1P1/5N1R/2q1nNKB b - - 3 35 | Qxc4 | What is the material balance in this position? | White is up 2 pawns of material | material |
rnbqkb1r/pp1p1ppp/4pn2/2p5/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq - 0 4 | Nc3 | Identify any Black knight outposts on the board. | None | outposts |
8/7k/5Kp1/6P1/5P2/8/8/8 w - - 5 8 | Kf7 | Identify any Black knight outposts on the board. | None | outposts |
8/8/3R4/1N1Qk3/2K5/8/1P6/8 b - - 2 69 | a8d5 | Is the Black king in check? | Yes | check |
r2q2r1/pbp1bk2/1p4p1/3pP3/3P4/3BB2Q/PPP4P/R5K1 w - - 9 23 | Rf1+ | Are there any open files in this position? | Yes: f | files |
r3kb1r/pp3ppp/2n1pn2/3q3b/3P4/4BN1P/PP2BPP1/RN1Q1RK1 b kq - 0 10 | Bb4 | What piece is on h7? | Black Pawn | occupancy |
r3r1k1/1pp1q1np/3p2p1/p2Pp3/2P1Q3/6PP/PP2BP2/R3K2R w KQ - 1 2 | h4 | Is the move from e4 to b8 legal? | No | legality |
1Q6/8/2p5/p6K/8/P1p5/1k6/8 b - - 2 47 | g8b8 | What is the material balance in this position? | White is up 7 pawns of material | material |
1r3bk1/3RpR1p/pp2P1p1/8/4KP2/1P6/P7/8 b - - 0 47 | Rc8 | Identify any Black knight outposts on the board. | f5, h5 | outposts |
2N3k1/5pp1/8/3B2B1/4pP1K/3b4/6r1/8 w - - 0 44 | Nd6 | Is the move from d5 to c5 legal? | No | legality |
2rb1rk1/1p4pp/p1qpb3/3NpP2/2P5/1P3N2/1P2QPPP/2RR2K1 b - - 0 1 | Bxd5 | Is the White king in check? | No | check |
4r1k1/3n1ppp/b4r2/p1b5/2p5/5KP1/P2N2BP/1R1QR3 w - - 0 24 | Kg4 | What piece is on b3? | Empty | occupancy |
8/3nKP2/2kB4/8/8/8/8/8 w - - 7 10 | Bf4 | Are there any open files in this position? | Yes: a, b, c, d, e, g, h | files |
r1bq1rk1/ppp2pbp/2np1np1/4p3/2P5/2NP1NP1/PP2PPBP/1RBQ1RK1 b - - 2 8 | a5 | Are there any open files in this position? | No | files |
rnb1k2r/pp1pq1pp/2p5/4Pp2/4n3/2NQ1N2/PPP1KbPP/R1B2B1R w kq - 2 9 | Bg5 | Is the move from c3 to e1 legal? | No | legality |
3rn1k1/1pqr3p/p2p2pQ/4pPP1/4P3/1PN5/1PP1b3/2KR3R w - - 0 24 | Nd5 | Does White have any isolated pawns? | No | structure |
5r2/2p3kp/p2b1rbN/3P2Q1/qp6/8/PB1R1PPP/4R1K1 w - - 3 36 | Re6 | Identify any White knight outposts on the board. | c6, e6 | outposts |
r2qk2r/1p3p2/p2p2nB/3P4/6R1/2P5/PPKQB2b/R7 b kq - 1 23 | Be5 | What piece is on c2? | White King | occupancy |
5k1r/1pp1q3/3pB1Rn/1p1PpP2/2P1P3/8/rP1Q4/2K5 w - - 0 25 | Qxh6+ | Does Black have any isolated pawns? | No | structure |
5rr1/p1k4p/1p1p1Bp1/n1p1ppP1/P1P5/2P2P1P/4BP2/3R1RK1 w - - 2 24 | c8c7 | What is the material balance in this position? | White is up 2 pawns of material | material |
r4k2/pp3q2/2pB4/3P1pQ1/8/8/PPP3PP/4R1K1 b - - 0 23 | f4d6 | Is the White king in check? | No | check |
6Q1/2B4b/5K1k/8/3p2P1/8/8/8 b - - 0 2 | Bxg8 | What piece is on g4? | White Pawn | occupancy |
r1b2rk1/pp2qppp/2n1pn2/2b5/2N5/1P3NP1/P1Q1PPBP/R1B2RK1 b - - 0 11 | b5 | Does Black have any isolated pawns? | No | structure |
2r4k/2p3p1/p1Q2p1p/8/5q2/7P/6P1/4R2K w - - 0 43 | Qxa6 | Is the move from h1 to e5 legal? | No | legality |
8/6R1/4Npk1/n6p/4P2P/5P2/P1p3PK/1r1n2B1 b - - 0 39 | Kh6 | Is the move from f6 to h4 legal? | No | legality |
8/2RR1p2/5pk1/1p2p2N/p6P/bq2P1P1/5P1K/8 w - - 1 38 | Rc6 | What piece is on f2? | White Pawn | occupancy |
7r/R6P/p7/5k2/8/1P6/P3K3/7R b - - 1 38 | c7a7 | What is the material balance in this position? | White is up 7 pawns of material | material |
6k1/4Rb2/3P3p/p1n2p2/3p1B2/1p1P3P/1P4PK/rB6 w - - 2 43 | Be5 | What piece is on f8? | Empty | occupancy |
r3r1k1/1p3ppp/p1nq1nb1/3p4/8/1NP2N1P/PP2BPP1/R2QR1K1 w - - 1 17 | Nbd4 | What is the material balance in this position? | Equal | material |
r2Q1rk1/4bppp/p4n2/npp1N1B1/P3b3/2P4P/BP3PP1/RN3RK1 b - - 0 15 | Raxd8 | Is the move from a5 to c4 legal? | Yes | legality |
r4bk1/pb1qr1p1/2pN3p/8/3p4/6P1/PPQ2P1P/2RR1BK1 w - - 3 22 | Rxd4 | What piece is on c4? | Empty | occupancy |
8/8/4R1p1/6p1/4pk2/5P1P/4r1PK/8 w - - 0 61 | Rxe4+ | Is the move from g2 to d2 legal? | No | legality |
r7/8/2pbkp2/p3p1p1/PrP1P3/5PB1/R1P2P2/R4K2 b - - 2 26 | Rab8 | Does White have any isolated pawns? | Yes: a4, c2, c4 | structure |
5rk1/3qbppp/4p3/p2p4/3N1N2/P3P1P1/1PR2P1P/5RK1 b - - 0 25 | e5 | Does Black have any isolated pawns? | Yes: a5 | structure |
3r2k1/pp3ppp/2n1q3/1B6/4p3/2P1Q1P1/PP5P/3KR3 w - - 1 21 | e8d8 | Is the White king in check? | Yes | check |
6k1/pbr2p1p/1p1P2p1/2q5/8/2P2NQ1/PP4PP/4R1K1 w - - 1 30 | Nd4 | Identify any Black knight outposts on the board. | None | outposts |
rnbqkb1r/pp1p3p/2p2pp1/4pP2/2B4N/2P5/PPP3PP/R1BQK2R b KQkq - 0 8 | d5 | What is the material balance in this position? | Black is up 1 pawn of material | material |
8/8/8/6K1/2N5/1P6/5k2/7r b - - 1 83 | Ke2 | Is the move from h1 to g1 legal? | Yes | legality |
3rr3/R4Q2/1pk1nR1B/3qp3/P1pp4/6P1/1P5P/6K1 b - - 1 33 | Kc5 | Does White have any passed pawns? | Yes: g3, h2 | structure |
r1bq1rk1/pp1n1pp1/2p1p2p/2P5/2pP4/P3BNP1/P1Q1PPBP/5RK1 w - - 0 15 | Qxc4 | Is the move from g1 to g5 legal? | No | legality |
1kbr3r/R1R3pp/Pp2pp2/8/1p1PP3/N3KPP1/7P/8 w - - 1 37 | Nb5 | What is the material balance in this position? | Equal | material |
5b2/2pk4/1p1p3p/1K1Pp1pP/1PP1P1P1/8/5B2/8 w - - 1 63 | Bxb6 | Does White have any passed pawns? | No | structure |
2r3k1/p1pR1p1p/6p1/1p4b1/4P3/2P2P2/PP5P/3R2K1 w - - 0 24 | b7b5 | What is the material balance in this position? | White is up 2 pawns of material | material |
r1br2k1/p3qppp/2p5/2b1P3/4QB2/P4P2/1P4PP/R3K1NR w KQ - 0 16 | Ne2 | Is the move from e1 to h3 legal? | No | legality |
1rrq2n1/5pkp/p1n1p1p1/2ppP3/Pp3Q2/2PPN2P/BP3PP1/R3R1K1 b - - 0 23 | Qa5 | Is the move from b4 to c3 legal? | Yes | legality |
r2qkb1r/1p3ppp/p1n1pn2/3p4/3P1Bb1/2NBP3/PP2NPPP/R2Q1RK1 b kq - 1 9 | Bd6 | Is the c-file open, semi-open, or closed? | open | files |
8/8/8/1p6/4Kpk1/1P6/6P1/8 w - - 0 56 | b4 | Does White have any isolated pawns? | Yes: b3, g2 | structure |
r4r2/ppp2ppk/2np4/7R/2P1b3/1PK1P2P/5PP1/7R b - - 4 23 | d5h5 | What is the material balance in this position? | Black is up 6 pawns of material | material |
3rr1k1/p4pbp/1pq3p1/2pp4/4n3/2P1P2P/PP1NQPP1/R1BR2K1 b - - 4 20 | c4 | Is the move from h7 to b3 legal? | No | legality |
rnnkbbqr/pppp1ppp/8/8/3pP3/5P2/PPP3PP/RNNKBBQR b KQkq - 0 3 | c5 | Is the move from f8 to a3 legal? | Yes | legality |
r2q1k2/p2n4/2p4r/7p/2BQ2P1/7P/PP6/4RRK1 b - - 0 24 | f3g4 | Is the Black king in check? | Yes | check |
1rb3k1/3nrppp/p1p1p3/q3P3/7P/2N1Q2R/PPP3P1/2KR1B2 w - - 0 17 | Rg3 | What piece is on b2? | White Pawn | occupancy |
r1rq1R2/3k1p2/p1bp1nN1/1p4Q1/4P1P1/2N5/PPP2PB1/1K1R4 w - - 1 29 | e8d7 | Identify any White knight outposts on the board. | d5, f5, h5 | outposts |
r1b1k2r/ppp2ppp/2n1pn2/5q2/1b1P4/1QN2N2/PP1BPPPP/R3KB1R b KQkq - 5 8 | O-O | Is the move from a7 to d5 legal? | No | legality |
1R2b3/3r1kPp/4pPp1/p3P3/8/1Pp5/2P5/1K6 w - - 1 33 | Rxe8 | What piece is on g7? | White Pawn | occupancy |
rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1B5/1P2PPPP/R2QKBNR b KQ - 0 6 | Ne4 | Is the move from a8 to c4 legal? | No | legality |
r3k2r/1bq1bppp/pp1p1n2/2n1pP2/P3P3/1NN2B2/1PP1Q1PP/R1B2R1K b kq - 5 14 | h6 | Is the move from c7 to c8 legal? | Yes | legality |
1rb3k1/p1p3pp/2pb4/3p4/3Pp3/4B2q/PPPQBr1P/2KR3R w - - 0 18 | Bxf2 | Is the move from e3 to f2 legal? | Yes | legality |
r4bk1/3q1pp1/1pbp4/r7/1NP1Pp1P/1PN2P2/3R1Q1P/3R2K1 b - - 1 32 | d5 | What is the material balance in this position? | White is up 1 pawn of material | material |
6R1/3k3p/p2pp3/8/1P1n4/P2P1n1P/4K3/1R6 w - - 5 35 | f5d4 | Is the White king in check? | Yes | check |
8/1p2p3/2npk3/1p2b1BP/5p2/8/5PP1/5RK1 w - - 0 32 | g3 | Does Black have any passed pawns? | Yes: b5, b7, d6 | structure |
8/8/K7/P5p1/1q3kP1/8/8/8 w - - 1 65 | a3b4 | What is the material balance in this position? | Black is up 8 pawns of material | material |
rn2kbnr/pp2pppp/2p5/3q4/2p3b1/N4NP1/PPQPPPBP/R1B1K2R b KQkq - 3 6 | b5 | Does Black have any passed pawns? | No | structure |
8/8/8/7p/7P/4pqP1/Q4k1K/8 b - - 5 61 | Qe2 | What piece is on b2? | Empty | occupancy |
2r1k3/7R/7p/2P1pbb1/1P6/5P1P/P1P3P1/1K1R4 w - - 0 34 | d7f5 | What is the material balance in this position? | White is up 4 pawns of material | material |
r1bqkb1r/ppp1pppp/2n5/3p4/3PnB2/4PN2/PPP2PPP/RN1QKB1R w KQkq - 1 5 | Qe2 | Are there any open files in this position? | No | files |
5rk1/1q4p1/1r1p3p/p1p1ppb1/2P1PnP1/1PP1Q2P/P2N1P2/R1BK3R w - - 3 24 | Qf3 | What is the material balance in this position? | White is up 1 pawn of material | material |
4Qnk1/1q3p2/6p1/8/3Np2p/2p1P2P/5PP1/6K1 w - - 8 63 | Qa4 | Is the move from f2 to f3 legal? | Yes | legality |
r1b3k1/pp1prppp/5qn1/3Q1P2/8/1B6/PP4PP/R1B1R2K w - - 0 19 | Bg5 | What piece is on h8? | Empty | occupancy |
8/1p1Rr2p/p1p1P2p/2k2P2/5KP1/7P/PP6/8 b - - 3 38 | d3d7 | What is the material balance in this position? | White is up 1 pawn of material | material |
8/p5p1/3k2P1/1pp3bP/P7/2K5/8/8 b - - 0 44 | a3a4 | Identify any Black knight outposts on the board. | a4, c4, d4 | outposts |
r2qrbk1/1b4pp/p2p1n2/1p1npP2/4N3/BP1B1N1P/P4PP1/R2QR1K1 w - - 2 21 | Nfg5 | Is the Black king in check? | No | check |
r2q3r/1bn1k1bp/p1p1pnp1/1p1P2N1/P1p1P2Q/6P1/1P3PBP/R1B2RK1 w - - 1 17 | d6+ | Does White have any isolated pawns? | No | structure |
1rbq1rk1/4bpRp/p2p4/3N1P1P/n2BP3/P4P2/1PPp4/1K1R4 b - - 0 23 | Kh8 | Identify any White knight outposts on the board. | d5, f5 | outposts |
r2qkb1r/ppp2ppp/1nn5/4N2b/8/1BNP3P/PPP2PP1/R1BQK2R b KQkq - 0 9 | Bxd1 | Identify any Black knight outposts on the board. | None | outposts |
rnbqkbnr/5ppp/1pp1p3/p2pP3/B2P4/P1N5/1PP2PPP/R1BQK1NR w KQkq - 0 8 | Nce2 | What piece is on f4? | Empty | occupancy |
r1bqk2r/ppp2ppp/2np1n2/2b5/2B1P3/2N2N2/PP3PPP/R1BQ1RK1 w kq - 0 8 | Bg5 | What piece is on g1? | White King | occupancy |
2rq1rk1/pb2nppp/1p6/3p4/3P4/P1NQ1N2/1P3PPP/2R1R1K1 w - - 2 17 | h4 | What piece is on c4? | Empty | occupancy |
rnbq2k1/pp3rbp/3pp3/4P1N1/2B5/2p5/PPP3P1/R1BQK2R b KQ - 0 13 | Qa5 | Does White have any passed pawns? | No | structure |
1k1r3r/ppp2p1p/1q4p1/4Pn2/1P3P2/2P4Q/P3N1PP/3R1R1K b - - 3 20 | Ne3 | Is the White king in check? | No | check |
5r2/R4p1k/7p/3P4/3QP1q1/6R1/PP4K1/8 b - - 1 37 | Qe2+ | What piece is on a2? | White Pawn | occupancy |
3r4/R2Pkp2/6p1/5K1p/7P/6P1/5P2/8 w - - 0 45 | Kg5 | What is the material balance in this position? | White is up 1 pawn of material | material |
r2r3k/4qp1p/p2npNn1/1pp5/2P2QP1/P1NPP3/1B5P/3R2K1 w - - 1 27 | Qg5 | What piece is on f4? | White Queen | occupancy |
rnb2rk1/2q1bppp/p2ppn2/5P2/Np1NP3/1B3Q2/PPP3PP/R1B2RK1 b - - 1 12 | e5 | What piece is on c1? | White Bishop | occupancy |
3r1k1r/pR3p1p/2p1R1Bp/3n4/6P1/5P2/P1P2Kb1/2Bq4 w - - 1 23 | Bxh6+ | What piece is on e3? | Empty | occupancy |
r2q1Bk1/1b1p1p1p/p5p1/3p2N1/2p1P2P/2P5/P4PP1/b2Q1RK1 b - - 0 19 | a3f8 | What is the material balance in this position? | Black is up 1 pawn of material | material |
r3k2r/pp1b1pp1/4p1P1/3pP2p/2nP2n1/P2B1NP1/4NPK1/Rq5R w kq - 0 19 | Raxb1 | What piece is on f7? | Black Pawn | occupancy |
3r2k1/p5pp/1p6/8/4R3/3p2P1/bP1R3P/6K1 w - - 0 28 | Ra4 | What piece is on f5? | Empty | occupancy |
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