[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. e3 cxd4 3. exd4 e6 4. Nf3 d6 5. Bd3 Nf6 6. O-O Be7 7. c3 O-O 8. Nbd2 Nc6 9. Re1 e5 10. dxe5 dxe5 11. Qc2 h6 12. Nxe5 Nxe5 13. Rxe5 Bg4 14. f3 Bh5 15. Re1 Qd6 16. Ne4 Nxe4 17. Bxe4 Rad8 18. g3 Qb6+ 19. Be3 Qb5 20. a4 Qa6 21. b4 f5 22. b5 Qf6 23. Bxb7 f4 24. Bd4 Qg5 25. g4 Bxg4 26. fxg4

[Assistant] Qxg4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. e3 Nf6 7. Nxc6 bxc6 8. Bd2 O-O 9. Be2 Rb8 10. O-O Rxb2 11. Na4 Rxd2 12. Qxd2 Ne4 13. Qd3 Bxa1 14. Rxa1 d5 15. cxd5 cxd5 16. Bf3 Nf6 17. Rd1 Bf5 18. Qd2 e6 19. Nc3 Qa5 20. Ne2 Qxd2 21. Rxd2 Rb8 22. h3 Be4 23. Bxe4 Nxe4 24. Rc2 Kg7 25. Nd4 a5 26. f3 Nd6 27. Kf2 Nc4 28. Nc6 Rb1 29. Nd4 a4 30. e4 a3 31. exd5 exd5 32. Ne2 Rb2 33. Rc1 Rxa2 34. Rd1 Nb6 35. Rd4 Rb2 36. Rd1 a2 37. Ra1 Nc4

[Assistant] Ke1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 e6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 e5 6. Nb3 Nf6 7. f3 Be7 8. Bg5 h6 9. Bxf6 Bxf6 10. Nd5 Bg5 11. Bb5+ Bd7 12. g3 Bxb5 13. c4 Bc6 14. h4 Be7 15. Qc2 Bxd5 16. exd5 Nd7 17. O-O O-O 18. Rae1

[Assistant] f5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. f4 c6 2. Nf3 Nf6 3. g3 d6 4. Bg2 Bg4 5. O-O Bxf3 6. Bxf3

[Assistant] Nbd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1b3k1/p5p1/1ppN4/3p4/7P/5p2/P5P1/4R1K1 w - - 0 31

[Assistant] Re8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bf4 Ne4 7. e3 Nxc3 8. bxc3 Bf5 9. Bd3 Bg6 10. O-O e6 11. Rb1 Qc8 12. Bxg6

[Assistant] hxg6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4k1r1/p3p2p/1pb5/2p2BB1/3nP2Q/3P2P1/4q2P/3R1R1K b - - 2 30

[Assistant] Nxf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. c4 d5 3. e3 f5 4. Nf3 c6 5. cxd5 Nf6 6. Nc3 exd5 7. Be2 Bd6 8. Ne5 Qe7 9. f4 Be6 10. O-O Nbd7 11. Bh5+ g6 12. Bf3 O-O 13. Qb3 Ne4 14. Nxe4 fxe4 15. Be2 Rab8 16. Bd2 a6 17. Ba5 Nf6 18. Rac1 Kg7 19. Qc2 Rbc8 20. Bd2 h5 21. Kh1

[Assistant] Ng4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Bd3 Nxd2 9. Qxd2 c5 10. f4 Qe7 11. Nf3 Nd7 12. O-O c4 13. Be2 Qa3 14. g4 Nb6 15. Ne1 Na4 16. Rf3 h5 17. h3 hxg4 18. hxg4 Bd7 19. Qc1 Qxc1

[Assistant] Rxc1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. e4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. Be3 c6 6. Qd2 b5 7. Bd3 Nbd7 8. e5 dxe5 9. dxe5 Ng4 10. e6 fxe6 11. Ng5 Nde5 12. O-O-O O-O 13. Bc5 Nxd3+ 14. cxd3 Bd4 15. f3

[Assistant] Nf2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6r1/p4pBk/2p4P/2p1PP1Q/2bq4/2p5/P1P2RP1/6K1 b - - 4 31

[Assistant] Rb8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3b4/p4bk1/4p1pp/2P1Pp2/3P1P2/5BP1/r2r1B1P/R4RK1 b - - 4 34

[Assistant] Rxf2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. h4 h6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Qc7 12. O-O-O Ngf6 13. Ne4 Nxe4 14. Qxe4 Nf6 15. Qe2 Bd6 16. Ne5 O-O-O 17. g3 Bxe5 18. dxe5 Nd5 19. c4 Ne7 20. f4 Nf5 21. Qf2 Rd4 22. g4 Rxc4+ 23. Kb1

[Assistant] Ne7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r5k1/p4p1p/1p1R2n1/4p1Q1/1P2qn2/P7/1B3PP1/R5K1 b - - 1 24

[Assistant] h6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4br1k/1N4p1/nP1p2qp/8/1nPP2P1/5p1P/5Q1B/R3R1K1 b - - 0 36

[Assistant] Nd3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 b6 5. bxc5 bxc5 6. c3 Ne7

[Assistant] d4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. e3 Nbd7 6. Nf3 Bb4 7. Qb3

[Assistant] Qa5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 Be7 5. c4 Nbd7 6. O-O dxc4 7. Qc2 Nb6 8. a4 a5 9. Na3 c6 10. Nxc4 Nbd5 11. Rd1 O-O 12. Bd2 b6 13. Be1 Ba6 14. Rac1 Nb4 15. Qb1 b5 16. Nce5 Rc8 17. Bxb4 Bxb4 18. Nxc6 Qd7 19. Nfe5 Qd6 20. Nxb4 Qxb4 21. axb5 Bxb5 22. e3 Nd5 23. Rxc8 Rxc8 24. Rc1 Rb8 25. Bf1 Bxf1 26. Kxf1 f6 27. Nd3 Qb5 28. Kg2 Nb4 29. Nc5 e5 30. Qf5 exd4 31. exd4 Qc6+ 32. f3 Qd5 33. Qxd5+ Nxd5 34. b3 Rb4 35. Rc4 Ne3+ 36. Kf2 Nxc4 37. bxc4 Rxc4 38. Ke3 a4 39. Kd3 Rb4 40. Kc3 Rb1 41. Nxa4

[Assistant] Kf7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. Nxd5 Qxd5 6. g3 Nc6 7. Bg2 e5 8. O-O Be7 9. d3 O-O 10. b3 Qd8 11. Bb2 f6 12. a4 Be6 13. Nd2 Rc8 14. Nc4 Qd7 15. Qc1 Rfd8 16. Ra2 b6 17. Bc3 Nd4 18. Bxd4 Qxd4 19. Rc2 Qd7 20. Qb1 Kh8 21. Rd1 Bd5 22. Rcd2 Bxg2 23. Kxg2 Qd5+ 24. e4 h5 25. exd5 Rxd5 26. Re2 Rcd8 27. h4 Rd4 28. Re4 R4d7 29. Re2 g6 30. Red2 Kg7 31. f4 exf4 32. gxf4 Rd4 33. Rf2 f5 34. Rf3 Bxh4 35. Rdf1 Bf6 36. Ne5 Re8 37. Qc2 Bxe5 38. fxe5 Rxe5 39. R1f2 Rg4+ 40. Rg3 Rd4 41. Re2 Red5 42. Rge3 Kf6 43. Re6+ Kg5 44. Qd2+ f4 45. R2e5+ Rxe5 46. Rxe5+ Kf6 47. Re4 Rxe4 48. dxe4 Ke5 49. Qd5+ Kf6 50. e5+ Kf5 51. e6+ Kg4 52. e7 f3+

[Assistant] Kf2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/ppB2ppp/q1n1b1n1/bN1p3Q/P7/5N2/1KB2PPP/3R3R w - - 5 18

[Assistant] Ng5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 d5 2. d4 Nf6 3. f3 Bg4 4. f4 Bh5 5. Be2 Bxe2 6. Qxe2 e6 7. Nf3 c5 8. Nbd2 Nc6 9. c3

[Assistant] cxd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. g3 Bg7 3. Bg2 c5 4. Nf3 cxd4 5. O-O Nc6 6. e3 dxe3 7. fxe3 Nf6 8. c3 d5 9. Nbd2 Ng4 10. Nb3 Qb6 11. Qe2 O-O 12. Nfd4 Nce5 13. h3 Nf6 14. g4 Ne4 15. Bxe4 dxe4 16. Nd2 f5 17. gxf5 gxf5 18. b3 Nd3 19. Ba3 Re8 20. Kh1 e5 21. Nxf5 Bxf5 22. Rxf5 Qg6 23. Rff1 Qh6 24. Kh2 Kh8 25. Nxe4 Nf4 26. exf4 exf4

[Assistant] Qf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r2b2/6kp/3nq1p1/2R1p1B1/1p1n2N1/1P3P2/1P4PP/3Q2K1 w - - 3 37

[Assistant] Rxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1k1r4/1p6/p6p/3p1R2/3Q3P/1KPR2P1/PP2r3/4q3 b - - 2 34

[Assistant] Qb1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/1pp1k3/p5pP/2P1K3/2P5/P7/8 b - - 0 46

[Assistant] Kf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1n3rk1/r3bppp/p2q1n2/1pp1N3/3pPB2/P2P2NP/RPP2PP1/3Q1RK1 b - - 2 15

[Assistant] Qe6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/5p1p/5P2/p5p1/2pP2P1/P2pPk1P/3K4/8 w - - 3 43

[Assistant] d5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. g3 d5 3. Bg2 Nf6 4. b3 Be7

[Assistant] Bb2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/3n2p1/1B3p1p/1K1kp3/1P6/5P2/6PP/8 b - - 0 36

[Assistant] Nxb6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/pp6/1P2k1pp/P1Pp1p2/3K1P1P/6P1/8 b - - 0 35

[Assistant] a5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 e5 3. Nc3 dxc4 4. d5 c6 5. e4 b5 6. Nf3 b4 7. Ne2 cxd5 8. exd5 Nf6 9. Nxe5 Qxd5 10. Qxd5 Nxd5 11. Nxc4 Bc5 12. Bd2 O-O 13. f3 Re8 14. O-O-O Bf5 15. Nf4 Nxf4 16. Bxf4 Nd7 17. Bd3

[Assistant] Bxd3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r7/5pk1/p2p2p1/2qn4/1pp2P2/3R2PP/PP1Qr1BK/5R2 w - - 0 26

[Assistant] Qxe2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r4/6bk/8/p4p1p/4nP1P/BR1P4/P7/3KR3 b - - 0 33

[Assistant] a4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5rk1/7p/R7/6p1/3Bn1K1/5P1P/6P1/8 b - - 0 42

[Assistant] Rf4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 d6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nxc6 bxc6 7. Bd3 g6 8. O-O Bg7 9. h3 O-O 10. a3 e5 11. Rb1 Be6 12. f4 exf4 13. Bxf4 Qe7 14. Be2 Rad8 15. Bg5 h6 16. Bh4 g5 17. Bf2 d5

[Assistant] e5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nbd7 8. Qf3 Qc7 9. O-O-O b5 10. g4 Be7 11. e5 Bb7 12. exd6 Bxd6 13. Ndxb5 axb5 14. Nxb5 Bxf3 15. Nxc7+ Bxc7 16. Bb5 Bxh1 17. Rxh1 h6 18. Bh4 Rxa2 19. Kb1 Ra5 20. Bc4 Bxf4 21. Rf1 g5 22. Be1 Rc5 23. Bb3 O-O 24. Bb4 Rb5 25. Bxf8 Nxf8 26. h4 Nxg4 27. hxg5 hxg5 28. Rg1 f5 29. Bc4

[Assistant] Rc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. f4 e6 5. Nf3 c5 6. g3 Nc6 7. Bg2 Be7 8. O-O O-O 9. a4 f6 10. exf6 Bxf6 11. d3 Re8 12. Re1 a6 13. Kh1 Rb8

[Assistant] Bd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 c6 2. c3 d5 3. Nd2 Nd7 4. Qc2 Nb6 5. e4 e6 6. Ngf3 dxe4 7. dxe4 Nf6 8. g3 Be7 9. Bg2 Nfd7 10. O-O O-O 11. Re1 e5 12. Nf1 Qe8 13. Ne3 f5 14. Nxf5 Nf6 15. Nxe7+ Qxe7 16. b3 Bg4 17. a4 Bh5 18. Ba3 Nbd7 19. Bxe7 Rf7 20. Bd6 h6 21. Nxe5 Nxe5 22. Bxe5 Ng4 23. Bf4 g5 24. Be3 Ne5 25. f3 Bxf3 26. Bxf3 Nxf3+ 27. Kg2 Nxe1+ 28. Rxe1 Raf8 29. Bd4 Rf3 30. Bxa7 g4 31. Bd4 h5 32. Re2 h4 33. Rf2 h3+ 34. Kg1 c5 35. Rxf3 Rxf3 36. Bxc5 Kf7 37. Bf2 Ke6 38. Qe2 b6 39. Qxf3 gxf3 40. Kf1 Ke5 41. Bxb6 Kxe4 42. Kf2 Kd5 43. Be3 Ke4 44. Bd4 Kd5

[Assistant] b4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. b3 Nc6 3. Bb2 e6 4. f4 a6 5. Nf3 d5 6. Nc3 d4 7. Ne2 f5 8. Ng3 Nf6 9. Qe2 Be7 10. O-O-O O-O 11. Kb1 b5 12. d3 Re8 13. Nd2 Bf8 14. Qf3 Bb7 15. Be2 Qa5 16. Nh5 Nxh5

[Assistant] Qxh5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. exd4 Nf6 6. h4 O-O 7. h5 d5 8. hxg6 fxg6 9. Ne5 Ne4 10. Be3 Nc6 11. c3 Nxe5 12. dxe5 Bf5 13. Nd2 Nxd2 14. Qxd2 Bxd3 15. Qxd3 e6 16. f4 Qe7 17. O-O-O Qf7 18. g4

[Assistant] a6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. d4 cxd4 3. Nf3 e5 4. c3 d3 5. Bxd3 d6 6. c4 f5 7. exf5 Nf6 8. O-O Be7 9. Nc3 O-O 10. Re1 Nc6 11. h3 Nd7 12. Nd5 Nc5 13. Bc2 Bxf5

[Assistant] Bxf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/5N1p/1k5P/p4pp1/2K5/6P1/8 b - - 5 39

[Assistant] f3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. d4 d6 5. exd6 cxd6 6. Nc3 g6 7. Be3 Bg7 8. Rc1 O-O 9. b3 Bf5 10. g4 Bc8 11. Bg2 Nc6 12. d5 Ne5 13. h3 f5 14. f4 Nf7 15. g5 e5 16. dxe6 Bxe6 17. Nf3 Re8 18. O-O Bxc4 19. Bxb6 Qxb6+ 20. Kh1 Bxf1 21. Bxf1 Rac8 22. Bc4 Qe3 23. Nd5 Qf2 24. Nf6+ Bxf6 25. gxf6 Re3 26. Ng5 Rf8 27. Rc2 Re1+ 28. Qxe1 Qxe1+ 29. Kg2 h6 30. Re2 Qxe2+ 31. Bxe2 hxg5 32. Bc4 Kh7 33. Kf3 gxf4 34. Kxf4 Ne5 35. Be6 Rxf6 36. Bc8 Kh6 37. Bxb7 g5+ 38. Kg3 f4+ 39. Kf2 f3 40. Bxf3 Nxf3 41. Ke2 Nd4+ 42. Kd3 Nxb3 43. axb3

[Assistant] Rf3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 g6 2. Bb2 Nf6 3. Bxf6 exf6 4. c4 Bg7 5. Nc3 f5 6. g3 O-O 7. Bg2 f4 8. gxf4 Nc6 9. e3 Re8 10. Nge2 Nb4 11. d4 Nc6 12. O-O Ne7 13. Rc1 c6 14. c5 d5 15. cxd6 Qxd6 16. Ne4 Qd8 17. Nc5 Nd5 18. Nd3 b6 19. Nc3 Bb7 20. Nxd5 cxd5 21. Ne5 f6 22. Nd3

[Assistant] Rc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r4/1pk5/p3p1bp/6p1/4N3/5PN1/PPn3PP/4R1K1 w - - 0 25

[Assistant] Rc1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. c4 cxd4 3. Nc3 d6 4. Qxd4 Nf6 5. Qd1 Nc6 6. g3 e6 7. Bg2 Be7

[Assistant] Nf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 e6 3. Bg5 d5 4. Nbd2 Be7 5. e3 Nbd7 6. Bd3 c6 7. c3 h6 8. Bh4 Ne4 9. Bxe7 Qxe7 10. Bxe4 dxe4 11. Nxe4 Nf6 12. Nxf6+ Qxf6 13. Qe2 b6 14. e4 O-O 15. e5 Qg6 16. O-O c5 17. Nh4 Qg5 18. g3 Bb7 19. f4 Ba6 20. Qxa6 Qg4 21. Qd3 cxd4 22. cxd4 Rac8 23. Qf3 Qh3 24. Rac1 Rfd8 25. Qg2 Qg4 26. Qf3 Qh3 27. Qg2 Qg4 28. h3 Qh5 29. Qf2 g5 30. fxg5 hxg5 31. Nf3 Rxc1 32. Rxc1 Qxh3 33. Nxg5 Qh5 34. Qf4 Rd7 35. Rf1 Kg7 36. Ne4 Qg6 37. Nf6 Rc7 38. Kg2 Rc2+ 39. Rf2 Rxf2+ 40. Qxf2 Kf8 41. Nd7+ Kg7 42. Qf6+ Qxf6 43. Nxf6 Kg6 44. Kf3 Kf5 45. g4+ Kg6 46. Kf4 a5 47. d5 b5 48. d6 a4 49. a3 b4 50. axb4 Kg7 51. d7 Kf8 52. d8=Q+ Kg7 53. Qf8+ Kxf8 54. Ne4 Ke7 55. Nc5 a3 56. bxa3 Kd8 57. a4 Kc7 58. g5

[Assistant] Kc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 e6 2. d4 d5 3. f4 c6 4. Bd3 Nf6 5. Nd2 g6 6. Ne2 Bg7 7. Ng3 O-O 8. Qe2 Nbd7 9. c3 Ne8 10. O-O Nd6 11. e4 dxe4

[Assistant] Ngxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2Q4r/1p3pp1/pk6/8/8/7P/Pq4PK/2R5 w - - 0 29

[Assistant] Qc5#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4r2/ppp1qp1k/1b3p1p/4P3/2B2Q2/2P1n3/PP5P/2K3R1 w - - 4 22

[Assistant] exf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nc3 d6 3. Bg5 h6 4. Bh4 g5 5. Bg3 Nh5 6. Qd2 Nxg3 7. hxg3 Bg7 8. O-O-O Nd7 9. e4 c5 10. Nf3

[Assistant] cxd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. f3 g6 4. Nc3 Bg7 5. Be3 Nf6 6. Qd2 dxe4 7. O-O-O

[Assistant] exf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d6 2. Bg2 Nf6 3. Nh3 g6 4. f3 Bg7 5. Nf2 O-O 6. d3 c6 7. O-O Nbd7 8. e4 Qc7 9. Nc3 e5 10. f4 exf4 11. gxf4 Re8 12. Be3 d5 13. e5 Nh5 14. d4 c5 15. Bf3 cxd4 16. Bxd4 Qc4 17. Bxh5 gxh5 18. b3 Qb4 19. Qe1 Nb6 20. Rd1

[Assistant] Kh8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 Nc6 3. Bb5 e5 4. O-O Nge7 5. c3 g6 6. d4 cxd4 7. cxd4 exd4 8. Nxd4 Bg7 9. Nxc6 Nxc6 10. Nc3 O-O 11. Bf4 a6 12. Bc4 Ne5 13. Bb3 b5 14. Qd6 Qf6 15. Qxf6 Bxf6 16. Nd5 Bg7 17. Rac1

[Assistant] Bb7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2rqr1k1/p4p2/3P2p1/1p6/2pQNP1p/P5nP/1P2B1PK/R7 w - - 1 33

[Assistant] Nf6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 b6 2. Nf3 Bb7 3. Bg5 h6 4. Bh4 g5 5. Bg3 Bg7 6. Be5 Nf6 7. Bxf6 Bxf6 8. h4 g4 9. Nfd2 d6 10. e3 Nd7 11. Rg1 h5 12. g3 c5 13. Bg2 Bxg2 14. Rxg2 Qc7 15. c3 O-O-O 16. Na3 e5 17. Qa4 Nb8 18. Ne4

[Assistant] Be7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d6 2. g3 Nf6 3. Bg2 Nc6 4. O-O Bg4 5. b3 Qd7 6. Bb2 Bh3 7. d4 h5 8. d5 Nd8 9. e4 h4 10. e5 Bxg2

[Assistant] Kxg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/7k/4R3/3pPp2/2pPbb1P/8/R4K2/2r5 w - - 7 52

[Assistant] Ra7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 e5 2. d4 d5 3. dxe5 Nc6 4. f4 f6 5. Nf3

[Assistant] fxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 g6 2. g3 Bg7 3. Bg2 Nf6 4. O-O O-O 5. d3 c5 6. c3 Nc6 7. Nbd2 b6 8. e4 Bb7 9. e5 Ng4 10. Re1 Qc7 11. d4 cxd4 12. cxd4 Nb4 13. Ne4 Nc2 14. Bf4 Nxe1 15. Qxe1 f5 16. Neg5 Rac8 17. e6 d6 18. h3 Nf6 19. Rc1 Qb8 20. Rd1 Qa8 21. h4 h6 22. Nh3 Bxf3 23. Bxf3 Qxf3 24. Rd2 Qe4 25. Qd1 Qxe6 26. Re2 Qxa2 27. Qd2 Rf7

[Assistant] Kg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nf6 2. Nc3 e5 3. d4 d6 4. d5 c6 5. Nf3 cxd5 6. exd5 e4 7. Nd4 Be7 8. Be2 O-O 9. f3 Nbd7 10. fxe4 Nc5 11. O-O Ncxe4 12. Nxe4 Nxe4 13. Bf3 Nf6 14. c3 b6 15. Qd3 Ba6 16. Qxa6 Re8 17. Qd3 Bf8 18. Bd2 Rc8 19. Rae1 Rc5 20. Rxe8 Nxe8 21. Re1 Nf6 22. Nf5 g6 23. Ng3 Rxd5 24. Bxd5 Nxd5 25. Qxd5 h5 26. Rf1 h4 27. Bg5 Qd7 28. Bxh4 Qe6 29. Qxe6 fxe6 30. Bf6 d5 31. Bd4 Bc5 32. Re1 Bxd4+ 33. cxd4 Kf7 34. Re5 b5 35. Ne2 a5 36. b3 a4 37. bxa4 bxa4 38. a3 g5 39. g3 g4 40. Kg2 Kf6 41. h3 Ke7 42. hxg4 Kd6 43. Kf3 Kc6 44. Kf4 Kb5 45. g5 Kc4 46. Rxe6 Kb3 47. Re5 Kxa3 48. Rxd5 Kb4 49. Rc5 a3 50. Ra5 Kxa5 51. Nc3 a2 52. Nxa2 Ka4 53. d5 Ka3 54. g6 Kxa2 55. g7 Kb3 56. g8=Q Kc4 57. Qg7 Kxd5 58. Qg6 Kc4 59. Qg5 Kd3 60. Qf5+ Ke2 61. Qe5+ Kf1 62. g4 Kg2 63. g5 Kh3 64. Kf5 Kg2 65. Kf6 Kf1 66. g6 Kg2 67. g7 Kf1 68. g8=Q Kf2 69. Qg7 Kf3 70. Qg6 Kf2 71. Qgg5

[Assistant] Kf1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/1R6/P1p1p3/8/2P3p1/1P5p/3r4/6K1 w - - 0 57

[Assistant] a7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2q1rk1/1ppn2p1/pb1pp2p/4p3/1PP1P1n1/P2P1N2/4NPPP/R1BQ1RK1 b - - 4 13

[Assistant] Rxf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 d6 2. Nc3 g6 3. b3 Bg7 4. Bb2 b5 5. cxb5 a6 6. f3 axb5 7. e4 b4 8. Na4 Bxb2 9. Nxb2 Ba6 10. d4 Bxf1 11. Kxf1 Qd7 12. Nh3

[Assistant] Qb5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 e5 2. Nf3 e4 3. Nd4 Nc6 4. Nc2 Nf6 5. d4 exd3 6. exd3 d5 7. Be2 dxc4 8. O-O cxd3 9. Bxd3 Bd6

[Assistant] Re1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5rk1/1p4pp/8/1qPp1b2/8/5Q2/5P1P/R4NK1 w - - 0 34

[Assistant] Qxd5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. Bc4 e6 5. Nge2 Be7 6. Ng3 O-O 7. Ngxe4 Nbd7 8. Nxf6+ Nxf6 9. O-O b6 10. Bg5 Bb7 11. Bd3 h6 12. Bh4 Nd5 13. Nxd5 Bxh4 14. Nf4 Bg5 15. Nh3 Bf6 16. Qc1 Qxd4 17. Qd2 Qxb2 18. Rab1 Qc3 19. Qe3 Rad8 20. Nf4 Qd4 21. Qg3 c5 22. Rbd1 Qe5 23. Nh5 Qxh5 24. Qe3 Qg5 25. Qg3 Rd4 26. Qxg5 Bxg5 27. g3 Bf6 28. f4 Rfd8 29. Rfe1 c4 30. Be2 Rxd1 31. Rxd1 Rxd1+ 32. Bxd1 Bd5 33. Kf2 Bd4+ 34. Ke2 Kf8 35. Kd2 Bc5 36. c3 Ke7 37. Bc2 b5 38. f5 a5 39. fxe6 Kxe6 40. a4 b4 41. cxb4 axb4 42. a5 c3+ 43. Kd3 Bc6 44. a6 Bb5+ 45. Ke4 Bxa6 46. Bb3+ Ke7 47. g4 Bb5 48. h4 g6 49. h5 gxh5 50. gxh5 f6 51. Kd5 Bd6 52. Kd4 Be5+ 53. Kd5 Bd3 54. Kc5 c2 55. Bxc2 Bxc2 56. Kxb4 Bd1 57. Kc5 Bxh5 58. Kd5 Bf7+ 59. Ke4 h5 60. Kf3 Be6 61. Kg2 h4 62. Kh1 Bd5+ 63. Kg1

[Assistant] Ke6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3

[Assistant] Bg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Bd3 Be7 7. O-O O-O 8. Nbd2 Nc6 9. c4 Qd8 10. Nb3 Nxd4 11. Nbxd4 cxd4 12. Nxd4 b6 13. Nb5 Bb7 14. Qe2 a6 15. Nc3 Qc7 16. Be3 Bc5 17. Rfc1 Bxe3 18. Qxe3 Rad8 19. Bf1 Bc6 20. b4 Qb7 21. a4 Be4 22. b5 a5 23. Nxe4 Nxe4 24. g3 Nc5 25. Bg2 Qd7 26. Bf3 Qd4 27. Qg5 Qf6 28. Qxf6 gxf6 29. Rd1 f5 30. Kf1 Kg7 31. Ke2 Kf6 32. Bc6 Ke5 33. f4+ Kf6 34. Ke3 Nb3 35. Rab1 Nc5 36. Rbc1 h6 37. Rb1 Ke7 38. Rbc1 f6 39. Rb1 e5 40. Rbc1 e4 41. Bd5 Nxa4 42. Rg1 h5 43. h3 Nc5 44. Rg2 Nd3 45. Rcg1 a4 46. g4 hxg4 47. hxg4 fxg4 48. Rxg4

[Assistant] Kd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. dxc5 Nxc5 7. Bd3 Nc6 8. O-O Be7 9. Bf4 a6 10. a3 b6 11. b4 Nxd3 12. cxd3 O-O 13. d4 Bd7 14. Rc1 Na7 15. Qd2 Bb5 16. Rfe1 Bc4 17. Bg5 a5 18. Rb1 h6 19. Bxe7 Qxe7 20. Qe3 axb4 21. axb4 Nc6 22. b5 Nb4

[Assistant] Rec1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 d5 3. Bg2 Bf5 4. O-O e6 5. Re1 h6 6. d3 Be7 7. Nbd2 Bh7 8. c4 c6 9. cxd5

[Assistant] cxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1k1r1r2/p5p1/1p1P1n1p/1Np1q3/PPQ5/4p2P/5PP1/R3R2K b - - 1 24

[Assistant] Ne4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4rr1k/1p4p1/4Q2p/p3B3/P2P4/7P/1q4PK/8 w - - 3 30

[Assistant] Qxh6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/1B3b2/p3kP2/1p6/1p1K4/1P6/2P5/8 w - - 5 48

[Assistant] Bd5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r4/1p3kp1/2pn2p1/P4p2/1P3P2/4K3/1B4PP/3R4 b - - 4 37

[Assistant] Nc4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bf4 c5 3. e3 cxd4 4. exd4 e6 5. c3 b6 6. Nf3 Bb7 7. Nbd2 d6 8. Bd3 Be7 9. h3 O-O 10. Qe2 Nbd7 11. O-O Re8 12. Rfe1 Bf8 13. Bh2 g6 14. a4 a6 15. Ng5 Qc7 16. Nge4 Nxe4 17. Nxe4

[Assistant] Kg7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r4k1/2p2pb1/5qpp/2QN4/pr3P1P/1P1RP3/P1P3P1/2K4R b - - 1 21

[Assistant] Qa1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 e6 2. c4 f5 3. Nc3 Nf6 4. d4 Bb4 5. Bd2 O-O 6. Rc1 d6 7. e3 Qe8 8. Qb3

[Assistant] Bxc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/1p3p1p/p2q1p2/8/2PP4/1P3R2/P3Q1PP/R5K1 b - - 0 19

[Assistant] Qxd4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c5 2. e3 d6 3. d4 Nf6 4. Bd3 g6 5. O-O cxd4 6. exd4 Bg7 7. c3 O-O 8. Re1 Nc6 9. Bg5 Bg4 10. h3 Bxf3 11. Qxf3 Rc8 12. Nd2 Qb6 13. Nc4 Qc7 14. Re2 Rfe8 15. Rae1 b5

[Assistant] Ne3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bc5 6. Be3 Bb6 7. Nxc6 bxc6 8. Qd2 Qe7 9. Bd3 d5 10. exd5 cxd5 11. Bb5+ Bd7 12. Nxd5 Nxd5 13. Qxd5 Rad8 14. Bxd7+ Rxd7 15. Qa8+ Rdd8 16. Qc6+

[Assistant] Kf8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r2k/pp4pp/2p5/7Q/1P1qN3/5B2/1P4PP/2b4K w - - 4 30

[Assistant] Qxe8#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Bd3 Be7 7. O-O O-O 8. c4 b6 9. Nc3 Bb7 10. Bf4 c5 11. d5 exd5

[Assistant] cxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2kr1r2/p1q3p1/Pp4b1/2p1p1Pp/3p3P/3P1Q2/1PP3B1/R4RK1 w - - 1 24

[Assistant] Bh3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/p1p2b2/1p6/3kp3/5P2/2P1K1N1/1P5P/8 b - - 0 30

[Assistant] exf4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Be7 5. Nf3 O-O 6. O-O d6 7. d3 Be6 8. Rb1 Nd7 9. b4 a6 10. a4 Nd4 11. b5 axb5 12. axb5 f5 13. Nxd4 exd4 14. Nd5 Nc5 15. Bb2 Bxd5 16. Bxd5+ Kh8 17. Bxd4 Bf6 18. Bxc5 dxc5 19. Bxb7 Rb8 20. Bf3 Be5 21. Qa4 f4 22. Kg2 Qd4 23. Qa6 Rb6 24. Qa1 Qxa1 25. Rxa1 Bxa1 26. Rxa1 fxg3 27. hxg3 g5 28. g4 Kg7 29. Ra7 Rf7 30. Bc6 Re7 31. e3 h6 32. Ra8 Rf7 33. Re8 Kf6 34. Rh8 Kg7 35. Rd8 Kf6 36. Rd5 Rb8 37. Rxc5 Re7 38. Be4 Rh8 39. Rc6+ Kg7 40. f3 h5 41. Rg6+ Kf7 42. Rxg5 hxg4 43. Rxg4 Ke6 44. Rg6+ Kd7 45. f4 Rf8 46. Kf3 Kc8 47. Ra6 Kd7 48. Bc6+ Kd6 49. d4 Rh7 50. c5+ Ke7 51. Ra7 Kf6 52. Ra8 Rh3+ 53. Ke4 Rf7 54. Re8 Rh1 55. Bd5 Re7+ 56. Rxe7 Kxe7 57. Ke5 Rb1

[Assistant] Bc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. c4 Nf6 3. Nf3 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2 e5 7. O-O exd4 8. Nxd4 c6 9. h3 Re8 10. f4 Nxe4 11. Bf3 Nc5 12. Qd2 Qb6 13. Kh1 Nbd7 14. Rb1 a5 15. Nc2 Nf6 16. Ne3 Nce4 17. Qc2 Nxc3 18. bxc3 Qc7 19. Ba3 Bd7 20. Rbd1 Bf8 21. Qd3 Rad8 22. Bxd6 Bxd6 23. Qxd6 Qxd6 24. Rxd6 Rxe3 25. Rxf6 Be6 26. f5 gxf5 27. Rh6 Kg7 28. Rh4 Rxc3 29. Be2 Rd2 30. Bh5 Rxc4

[Assistant] Rxc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 Nf6 2. Nc3 d5 3. e4 dxe4 4. Nxe4 Nxe4 5. dxe4 Qxd1+ 6. Kxd1 e5 7. c3 Be6 8. Kc2 Nd7 9. Bd3 Bc5 10. f3 O-O-O

[Assistant] Ne2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/2pk2P1/1p4r1/6R1/6K1/6P1/8 b - - 2 40

[Assistant] Rxg4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. f4 d5 2. Nf3 Nf6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d3 c5 7. Nc3 Nc6 8. e4 dxe4 9. dxe4 Qxd1 10. Rxd1 Nb4 11. e5 Nxc2 12. Rb1 Ng4 13. Rd2 Nce3 14. Bh1 Nc4 15. Re2 Bf5 16. Ra1 Rfd8 17. b3 Nb6 18. h3 Nh6 19. Be3 Nd5 20. Nxd5 Rxd5 21. Nh4 Bd3 22. Rd2 Rd7 23. Rad1 Rad8 24. Bxb7 Bb5 25. Rxd7 Rxd7 26. Rxd7 Bxd7 27. Bxc5 a5 28. g4 Bf8 29. Nf3 f5 30. Ng5 Nf7 31. e6 Be8 32. exf7+

[Assistant] Bxf7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rnb2rk1/p3ppbp/1p4p1/2p1P3/q1BP4/2P2N1P/1RPQ2P1/2B1K2R w K - 2 15

[Assistant] Bd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1k3q1/1pp3r1/1n2PQ2/1p5p/3P4/1P6/P2b2PP/R4RK1 w - - 1 27

[Assistant] Qf8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. e5 c5 4. Nf3 Nc6 5. Bb5 f6 6. Bxc6+ bxc6 7. O-O fxe5 8. Nxe5

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 d3 5. Bxd3 d6 6. c4 Nf6 7. Nc3 Be7 8. O-O O-O 9. Re1 Nc6 10. h3 Bd7 11. Bg5 Rc8 12. Rc1 h6 13. Bh4 Ne5 14. Nxe5 dxe5 15. b3 Bc6 16. Bb1 Qxd1 17. Rcxd1 Rfd8 18. f3 Bc5+ 19. Bf2 Bd4 20. Ne2 Bxf2+ 21. Kxf2 Rxd1 22. Rxd1 Kf8 23. a4 Ke7 24. g3 Rd8 25. Rxd8 Kxd8 26. Ke3 Kc7 27. f4 Nd7 28. Nc3 exf4+ 29. gxf4 Nc5 30. Bc2 a6 31. f5 e5 32. h4 Kd6 33. h5 Nd7 34. Nd5 Bxd5 35. exd5 Nf6 36. Be4 Nxh5 37. Bf3 Nf6 38. Be4 Nxe4 39. Kxe4 f6 40. Kf3 h5 41. Kg3 e4 42. Kh4 Ke5 43. Kxh5 e3 44. Kg6 e2 45. Kxg7 e1=Q 46. Kf7 Kd6 47. Kxf6 Qe5+ 48. Kg6 Ke7 49. f6+ Qxf6+ 50. Kh5 Qd6 51. Kg4 Kd7 52. Kf5 Qc5 53. Ke4

[Assistant] b5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r4rk/3b2b1/p4q2/4pPn1/3pP3/3P2R1/1p1B1PQK/1R6 w - - 0 41

[Assistant] Bxg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4rr2/p1q2pk1/1p3Rpp/3Pp3/2PnB1PP/1P4Q1/P7/5RK1 b - - 4 35

[Assistant] Ne2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 g6 2. Bg2 Bg7 3. d3 d6 4. Nf3 Nf6 5. O-O O-O 6. c4 c6 7. Nc3 Nbd7 8. Qb3 e5 9. Be3 Qc7 10. h3 a6 11. Rac1 Re8 12. Rfd1 Nf8 13. Qc2 Ne6 14. b4 Qd7 15. b5 axb5 16. cxb5 d5 17. Bd2 Qd6 18. Rb1 e4 19. dxe4 Nxe4 20. Nxe4 dxe4 21. Bc3 Qa3 22. Bxg7 Nxg7 23. Nd4 Qxa2 24. Qxa2 Rxa2 25. bxc6 bxc6 26. Nxc6 Be6 27. e3 Bf5 28. g4 Bc8 29. Rb8 Rc2 30. Bxe4 Rc4 31. Rxc8 Rxe4 32. Rxe8+ Rxe8 33. Rd7 Ne6 34. Kg2 Kf8 35. Nd4 Nxd4 36. Rxd4 Re5 37. Rf4 Kg7 38. Kg3 f6 39. h4 Ra5 40. Kf3 h5 41. gxh5 Rxh5 42. Kg3 Ra5 43. Rd4 f5 44. Rd7+ Kh6 45. Rd4 Rb5 46. Rf4 Rc5 47. f3 Re5 48. e4 Kh5 49. exf5 gxf5 50. Rc4 Rd5 51. Rc7 Rb5 52. Rh7+ Kg6 53. Re7 Rd5 54. Re3 Kf6 55. Ra3 Rb5 56. Ra4 Rb1 57. Kf4 Rg1 58. Ra6+ Ke7 59. Kxf5 Rh1

[Assistant] Re6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. Bb3 b5 7. a4 Bb7 8. O-O Nbd7 9. Nc3 b4 10. Ne2 c5 11. Ng3 Be7 12. Qe2 a5 13. Rd1 Qc7 14. e4 cxd4 15. Nxd4 Nc5 16. Bc4 O-O 17. e5 Nfd7 18. Nb5 Qc6 19. f3 Rfd8 20. Bf4 Nb6 21. Nd6 Nxc4 22. Qxc4 Bxd6 23. exd6 Nxa4 24. Qb3 Nc5 25. Qe3 Nd7 26. Ne4 Qb6 27. Qxb6 Nxb6 28. Nc5 Bd5 29. d7 Nxd7 30. Bc7 Nxc5 31. Bxd8 Rxd8 32. Rxa5 Nd7 33. Rda1 b3 34. Rc1 Kf8 35. Kf2 Ke7 36. Ke3 Ne5 37. Ra7+ Rd7 38. Ra4 g5 39. h4 h6 40. hxg5 hxg5 41. Rc8 f5 42. Rg8 Kf6 43. Rc8 f4+ 44. Ke2

[Assistant] Rh7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nc3 b6 2. d3 Bb7 3. e4 e6 4. Be2 d5 5. f4 d4 6. Nb1 c5 7. Nf3 f5 8. O-O Nf6 9. e5 Nd5 10. c4 dxc3 11. bxc3 Be7 12. c4 Nb4 13. a3 N4c6 14. Nbd2 Nd4

[Assistant] Nb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/P1p2ppp/2Qb2q1/7N/8/5N2/5PPP/R2R2K1 b - - 0 28

[Assistant] Bxh2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 dxc4 7. Nbd2 c6 8. Nxc4 Be6 9. Ne3 Na6 10. b3 Nc7 11. Bb2 Nfd5 12. Nxd5 Bxd5 13. e3 a5 14. Qe2 a4 15. bxa4 Rxa4 16. Nd2 Bxg2 17. Kxg2 Rxa2 18. Rxa2 Qd5+ 19. Nf3 Qxa2 20. Ra1 Qd5 21. Ra7 c5 22. e4 Qc6 23. d5 Qb6 24. Ra2 Bxb2 25. Rxb2 Qa7 26. Qe3 b5 27. Qh6 f6 28. Nh4 c4 29. Nxg6 hxg6 30. Qxg6+ Kh8 31. Qh6+ Kg8 32. Qg6+ Kh8 33. Re2 e5 34. Qh6+ Kg8 35. Qg6+

[Assistant] Kh8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 c5 2. Bg2 g6 3. d3 Bg7 4. e4 Nc6 5. c3 Nf6 6. Nf3 d5 7. e5 Nd7 8. d4 e6 9. O-O h6 10. Be3 cxd4 11. cxd4 Nb6 12. Na3 a6 13. Rc1 Bd7 14. Qd2 Rc8 15. Rc3 Na7 16. Rfc1 Rxc3 17. Rxc3 Nb5 18. Nxb5 Bxb5 19. b3 a5 20. a4 Ba6 21. Rc5 g5

[Assistant] Qxa5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1n1r2k1/p4pp1/1p2p2p/3qP3/1P6/P6P/4RPP1/2B1Q1K1 w - - 1 25

[Assistant] Rd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 Nf6 3. d3 Nc6 4. Nd2 g6 5. Ngf3 Bg7 6. g3 O-O 7. Bg2 d5 8. O-O Bg4 9. h3 Bxf3 10. Qxf3 d4 11. c4 Rab8 12. b3 Nd7 13. Qe2 Qc7 14. f4 b5 15. Nf3 bxc4 16. bxc4 Rb6 17. g4 Rfb8 18. e5 Rb6b1 19. Raxb1 Rxb1 20. Kh2 Bh6 21. g5 Bf8 22. Nd2 Rb8 23. Ne4

[Assistant] e6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Bg5 c5 3. dxc5 Nc6 4. e4 dxe4 5. Qxd8+ Kxd8 6. Nc3 Bf5 7. O-O-O+ Kc8 8. Bb5 Nf6 9. Nge2 Bg6 10. Nf4 Nd7 11. Nxg6 hxg6 12. Bxc6 bxc6 13. b4 f5 14. Kb2 Rh5 15. Be3 e5 16. g3 Be7 17. h4 Kc7 18. Kb3 Rd8 19. a4 a6 20. Nb1 Nf8 21. Rxd8 Kxd8

[Assistant] Rd1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 e6 3. e3 c5 4. Be2 Nf6 5. O-O Be7 6. b3 b6 7. Bb2 Bb7 8. Nbd2 O-O 9. Ne5 Nbd7 10. Ndf3 Ne4 11. Bd3 Nxe5 12. Nxe5 f6 13. Nf3 cxd4 14. Nxd4 Qd6 15. c4 Nc5 16. Be2 Rfd8 17. Qc2 Rac8 18. Rfd1 Kh8 19. Bg4 f5 20. Be2 Bf6 21. Nb5 Qe7 22. Nxa7 Ra8 23. Nb5 dxc4 24. Bxc4 Bxb2 25. Qxb2

[Assistant] Qg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 e6 3. dxe6 Bxe6 4. d4

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2k4r/pRp3p1/2p1b3/8/4pP2/3rQ1Pp/P1qB4/1R5K w - - 0 24

[Assistant] Qxa7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 d6 3. Bg2 Nc6 4. O-O e5 5. d4 e4

[Assistant] Ng5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. g4 Be6 10. Nxe6 fxe6 11. O-O-O Qa5 12. Bc4 d5 13. exd5 exd5 14. Nxd5

[Assistant] Qxd2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. Nc3 d4 3. Nce2 c5 4. Ng3 Nc6 5. Nf3 h5 6. Bc4 h4 7. Ne2 h3 8. gxh3 Bxh3 9. d3 e6 10. Rg1 Nf6 11. Bf4 Bg4 12. Ne5 Nxe5 13. Bxe5 Bh5 14. Qd2 Bd6 15. f4 Bxe5 16. fxe5 Ng4 17. O-O-O Nxe5 18. Rdf1 Bg6 19. Nf4 Nxc4 20. dxc4 Bxe4 21. Rxg7 Qf6 22. Rgg1 O-O-O 23. Nd5 Qh6 24. Ne7+ Kb8 25. Rxf7 Qxd2+ 26. Kxd2 Rxh2+ 27. Kd1 Bxc2+ 28. Ke1 d3 29. Rf2 d2+ 30. Rxd2 Rdxd2 31. Rg7 Rhe2+ 32. Kf1 Bd3

[Assistant] Nc6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. d4 cxd4 3. c3 e5 4. Nf3 Nc6 5. cxd4 exd4 6. Nxd4 Nf6 7. Nxc6 bxc6 8. Nc3 Bb4 9. Bd3 d5 10. exd5 Nxd5 11. O-O Nxc3 12. bxc3 Be7 13. Re1 O-O 14. Be3 Bf6 15. Bd4 Bxd4 16. cxd4 g6 17. Bc4 Bf5 18. d5 cxd5 19. Qxd5 Qxd5 20. Bxd5 Rab8 21. Bf3 Rfe8 22. a4 Kg7 23. Rxe8 Rxe8 24. g3 Rb8 25. a5 Rb2 26. a6 Rb1+ 27. Rxb1 Bxb1 28. Kf1 Bd3+ 29. Ke1 Bxa6 30. Kd2 Bc8 31. Kc3 Kf6 32. Kb4 Ke5 33. Ka5 Kd4 34. Be2 Kc3 35. Ba6 Bxa6 36. Kxa6 Kd3

[Assistant] Kxa7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 d5 2. Nf3 Nf6 3. e4 dxe4 4. dxe4 Qxd1+ 5. Kxd1 Nxe4 6. Ke1 e6 7. Bd3 Nc5 8. Bb5+ c6 9. Bc4 Nbd7 10. b4 Ne4 11. Bb3 Bxb4+ 12. Ke2 Bc5 13. Bb2 O-O 14. Rf1 Nef6 15. Nbd2 Bd6 16. Nc4 Bc7 17. Rad1 b5 18. Nd6 Bxd6 19. Rxd6 Bb7 20. Rfd1 Rfd8 21. Bxf6 gxf6 22. Rxd7 Rxd7 23. Rxd7 Bc8 24. Rd8+ Kg7 25. c4 a6 26. c5 a5 27. Nd4 b4 28. Ke3 Bb7 29. Rxa8 Bxa8 30. Bc2 e5 31. Nf5+ Kf8 32. Nd6 Ke7 33. Bxh7 Ke6 34. Bd3 Kd5 35. Ne4 f5 36. Nf6+ Kxc5 37. Bxf5 Kd6 38. Bc2 c5 39. Ne4+ Kd5 40. h4 f5 41. h5 f4+ 42. Kf3 Ke6 43. h6 Kf7 44. h7 Kg7 45. Kg4 Kxh7 46. Nxc5+ Kg7 47. Nb3 Kf6 48. Nxa5 Bxg2 49. f3 Bf1

[Assistant] Nb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. c4 d5 3. Nc3 e6 4. cxd5 exd5 5. Bf4 Nf6 6. e3 Bd6 7. Bxd6 Qxd6 8. Bd3 O-O 9. Nge2

[Assistant] Bg4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r6r/p1pqkpb1/Q2p2p1/4N3/4P3/2P1n3/PP4PP/RNB2RK1 b - - 0 17

[Assistant] Bxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. Nf3 d5 3. e3 Nf6 4. Be2 e6 5. O-O b6 6. c3 c5 7. b3 c4 8. bxc4 dxc4 9. Bxc4 Bb7 10. Bb5+ Nbd7 11. c4 a6 12. Ba4 Be7 13. Bb3 O-O 14. Nc3 Rc8 15. Bb2 Ne4 16. Rc1 Nxc3 17. Bxc3 f5 18. Bb2 Bf6 19. Qe2 Re8 20. d5 e5 21. Rfd1 Nc5 22. Bc2 e4 23. Bxf6 Qxf6 24. Nd4 a5 25. Qd2 Rf8 26. Qc3 Rce8 27. Qa3 f4 28. exf4 Qxf4

[Assistant] Rf1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2qkb1r/1b3ppp/p1p1p3/2ppN3/4nPP1/1P1PP3/PBP4P/RN1QK2R b KQkq - 0 10

[Assistant] Qh4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 d6 5. Bd3 O-O 6. Nbd2 c5 7. c3 cxd4 8. exd4 Be6 9. Qe2 Nc6 10. h4 Qb6 11. b3 Rac8 12. h5 Nd5 13. Nc4 Nxf4 14. Nxb6 Nxe2 15. Nxc8

[Assistant] Nxc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 g6 2. Bg2 Bg7 3. c3 Nf6 4. Qb3 O-O 5. Bxb7 Bxb7 6. Qxb7 Nc6 7. Qb3 Rb8 8. Qc2 d5 9. d4 e5 10. dxe5 Nxe5 11. Nf3 Nxf3+ 12. exf3 Re8+ 13. Kf1 Qd7 14. Kg2 Re5

[Assistant] Bf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c6 2. d4 d5 3. c3 Nf6 4. Bg5 e6 5. Bxf6 Nd7 6. Bxd8 Kxd8

[Assistant] e3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2kr4/ppp2p1p/1P2b3/1P4pq/4P3/2Qr2B1/5PPP/2R2RK1 b - - 0 26

[Assistant] Rxc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1rb2rk1/2q1bR1p/p3p1p1/p1p4Q/4p3/2PNP1P1/1P5P/5RK1 w - - 0 26

[Assistant] Qxh7#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/1p6/1p1r1p1k/3R3P/2P5/P1K5/8 b - - 4 38

[Assistant] Rxd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 d5 2. d4 c6 3. c4 Nf6 4. Nc3 dxc4 5. Be2 b5 6. Nf3 a6 7. O-O Bb7 8. Ne5 e6 9. Bf3 Nbd7 10. Nxc6 Bxc6 11. Bxc6 Rb8 12. a3 Qc7 13. Qf3 Bd6 14. h3 O-O 15. Re1 Rfc8 16. Bxd7

[Assistant] Qxd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. f4 Nc6 5. c3 Nf6 6. Bd3 Bg4 7. Nf3 e6 8. O-O Bd6 9. Be3 O-O 10. Nbd2 Qc7 11. Qe1 Bxf4 12. Bxf4 Qxf4 13. Kh1 Bxf3 14. Rxf3 Qc7 15. Qh4 h6 16. Rxf6 gxf6 17. Qxh6 f5 18. Qg5+ Kh8

[Assistant] Qh6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. Nc3 Nd7 3. d4 Ngf6 4. e5 dxe5 5. d5 g6 6. Nf3 Bg7 7. Bd3 O-O 8. Be3 c6 9. dxc6 bxc6 10. h3 Qc7 11. O-O Bb7 12. Qe2 Rad8 13. Rad1 a6 14. Na4 Rfe8 15. Bxa6 Bxa6 16. Qxa6 e4 17. Nd4 Ne5 18. Bf4 Ra8 19. Qb6 Qd6 20. Nb3 Qe6 21. Nac5 Qf5 22. Bxe5 Qxe5 23. Qxc6 Rec8 24. Qb5 Rab8 25. Qc4 e6 26. Qb4 Nd5 27. Qa3 e3 28. Nd7 Qe4 29. f3

[Assistant] Qf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d5 2. Bg2 e6 3. Nf3 Nf6 4. O-O Be7 5. d3 O-O 6. Nbd2 b6 7. e4 Bb7 8. e5 Nfd7 9. Re1 c5 10. h4 d4 11. Nf1 Bxf3 12. Nh2 Bxd1 13. Rxd1 Nc6 14. Bxc6 Rc8 15. Bg2 Nb8 16. Re1 Nc6 17. h5 h6 18. Ng4 Bg5 19. f4 Be7 20. b3 Re8 21. a4 Bf8 22. Re2 Ne7 23. Kh2 Nd5 24. Nf2 Nc3 25. Re1 Nd5 26. Bd2 a6 27. Be4 b5 28. axb5 axb5 29. Ra7 c4 30. Rea1 cxd3 31. Bxd3 Nc3 32. Ne4 Nxe4 33. Bxe4 Bc5 34. Bd3 Bxa7 35. Rxa7 Qb6 36. Ra1 b4 37. Re1 Qc6 38. Re4 Qxc2 39. Bxc2 Rxc2 40. Re2 d3 41. Rg2 Rec8 42. g4 Rxd2 43. Kg3 Rcc2 44. Rg1 Rg2+

[Assistant] Rxg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r4r/4bk1p/p2p3B/3PnNPn/1p3Q1P/5P2/PPq5/K2R3R w - - 2 25

[Assistant] Nxd6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. O-O O-O 8. Bb3 Nc6 9. Nxc6 bxc6 10. Be3 a5 11. h3 Ba6 12. Re1 Qc7 13. Qd2 Rfe8 14. Rad1 Nd7 15. Bd4 Ne5 16. f4 c5 17. Nd5 Qa7

[Assistant] Bc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Nf6 3. Bb5+ Bd7 4. Bc4 Bg4 5. f3 Bf5 6. Nc3 Nbd7 7. Nge2 Nb6 8. d3 Nbxd5 9. Nxd5 Nxd5 10. O-O e6 11. Ng3 Bg6 12. f4 Qd7 13. Qf3 O-O-O

[Assistant] f5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. d3 d6 3. f4 Nc6 4. Nf3 g6 5. Be2 Bg7 6. O-O Nf6 7. h3 O-O 8. Nc3 d5 9. Nh2 dxe4 10. dxe4 Qxd1 11. Rxd1 Be6 12. Be3 b6

[Assistant] Rf1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5r2/1p3pkp/3p4/q2Pp1Pp/5P2/pPr4P/K2Q3N/3R3R b - - 1 25

[Assistant] Rfc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d3 e5 2. Nd2 d6 3. Ngf3 g6 4. e4 Bg7 5. g3 Nh6 6. Bg2 f6 7. O-O Nf7 8. c3 O-O 9. Nh4 f5 10. Qb3 f4 11. Nc4 g5 12. Nf5 Bxf5 13. exf5 d5 14. Nd2 c6 15. Qxb7 Nd7 16. Qxc6 Nf6 17. Bxd5 Rc8 18. Bxf7+ Rxf7 19. Qg2 g4 20. Ne4 f3 21. Qh1 Qxd3 22. Nxf6+ Rxf6 23. Be3 Qxf5 24. Rad1 Re8 25. Rd5 h5 26. Rfd1 h4 27. gxh4 Qh5 28. Rd7 Qxh4 29. Bxa7 e4 30. Be3 Bh6 31. Bd4 Rf7 32. Rxf7 Kxf7 33. Kf1 Qh3+

[Assistant] Ke1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. d3 c6 3. Bg5 Nf6 4. Nc3 e6 5. e4 Be7 6. e5 Nfd7 7. Bf4 c5 8. Ne2 a6 9. h4 Nc6 10. h5 h6 11. Ng3 Qc7 12. Qe2 b5 13. a3 Bb7 14. Rh3 O-O-O 15. Nh1 Kb8 16. g4 Ka7 17. Rg3 f6 18. Bg2 fxe5 19. Bd2 Bd6 20. Rh3 Rhf8 21. O-O-O Rxf3 22. Bxf3 Nd4 23. Qf1 Nb6 24. Be3 c4 25. Bxd4 exd4 26. dxc4 dxc4 27. Rxd4 Bf4+ 28. Rxf4 Qxf4+ 29. Kb1 Bxf3 30. Ng3 Rd1+ 31. Qxd1 Bxd1 32. Rh1 Bf3 33. Re1 Bd5 34. Re2 c3 35. bxc3 Na4 36. c4 Nc3+ 37. Kb2 Nxe2 38. Kb3 Bxc4+ 39. Kb4 Nxg3 40. Kc5 Qe5+ 41. Kb4 Qd6+ 42. Kc3 Ne4+ 43. Kb2 Qd4+ 44. c3

[Assistant] Qxc3+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 c5 6. c4 cxd4 7. Nxd4 Nc6 8. Nc3 Qb6 9. Nxc6 bxc6 10. b3 Ne4 11. Bxe4

[Assistant] Bxc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: N1b1r2k/pp1p2pp/3Q4/8/8/5n1q/PPP1B2P/R2K1R2 b - - 3 20

[Assistant] Qxf1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/7p/b2kNP2/8/1p1P1K1P/1r6/8/8 w - - 0 43

[Assistant] f7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. e3 a6 5. Bd3 Bg4 6. Nbd2 e6 7. Qc2 Nbd7 8. b3 Bxf3 9. Nxf3 c5 10. O-O cxd4 11. exd4 Rc8 12. Qe2 Be7 13. Bb2 O-O 14. Rac1 Bd6 15. Ne5 dxc4 16. Bxc4 Bxe5 17. dxe5 Nd5 18. Bxd5 exd5 19. e6 Nf6 20. e7 Rxc1 21. exd8=Q Rxf1+ 22. Qxf1 Rxd8 23. Bxf6 gxf6 24. Qd3 d4 25. Kf1 Kf8 26. Ke2 Ke7 27. Qxh7 d3+ 28. Kd2 Rd6 29. Qe4+ Kd7 30. Qxb7+ Ke6 31. h4 f5 32. h5 Kf6 33. h6 Kg6

[Assistant] h7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 Nf6 2. Bb2 g6 3. d4 Bg7 4. Nf3 O-O 5. e3 a5 6. Be2 a4 7. O-O Nc6 8. b4 Nxb4 9. a3 Nc6 10. c4 d5 11. cxd5 Nxd5 12. Nc3 Nxc3

[Assistant] Bxc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r5/r4kp1/5p2/6p1/8/1K2P3/2R1RPPP/8 b - - 0 40

[Assistant] Rb7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r2k1/5rpq/p1n5/1p1pR3/3PnN2/P2QP3/1P4RN/7K w - - 9 34

[Assistant] Rh5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1kbr3r/p4pp1/2pq3p/2p5/Q1N1P1n1/4B3/PPP2PPP/R4RK1 b - - 5 18

[Assistant] Qxh2#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 f5 2. e3 Nf6 3. Be2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. d5 e5 8. Nc3 e4 9. Nd4 Nbd7 10. Re1 Ne5 11. f4 exf3 12. Nxf3 Nxf3+ 13. Bxf3 Qe7 14. e4 fxe4 15. Nxe4 Nxe4 16. Rxe4 Qf6 17. Qe2 Bf5 18. Re3 Rae8 19. Rxe8 Qd4+ 20. Kh1 Rxe8 21. Qxe8+ Bf8 22. Bh6 Qf6 23. Qxf8+ Qxf8 24. Bxf8 Kxf8 25. Re1 Kf7 26. Be4 Bg4 27. Rf1+ Ke7 28. h3 Bd7 29. g4 c6 30. Kg2 cxd5 31. Bxd5 b6 32. Rf2 a5 33. Re2+ Kd8 34. Kf2 Kc7 35. Rd2 Bc6 36. Ke3 Bxd5 37. cxd5 b5 38. Kd3 Kb6 39. Kd4 b4 40. Kc4 a4 41. Kxb4 Kc7 42. Ka3 Kd7 43. Kxa4 Ke7 44. Rd4

[Assistant] Kf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/6P1/8/pk6/3R4/6r1/3K4 b - - 0 58

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. Nc3 dxe4 3. Nxe4 Qd5 4. Nc3 Qa5 5. Nf3 Nf6 6. d4 Nc6 7. Bc4 Bg4 8. h3 Bxf3 9. Qxf3

[Assistant] O-O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. c3 Bf5 8. h3 Bg6 9. Bd3 e6 10. Bxg6 hxg6 11. Qb3 Bd6 12. Be3 Qc7 13. O-O-O O-O 14. Rhe1 c5 15. dxc5 Bxc5 16. Bxc5 Qxc5 17. Qc2 b5 18. Kb1 a5 19. Rd2 Rac8 20. Red1 Nd5 21. Ne5 Rc7 22. Nd3 Qb6 23. Qb3 Rfc8 24. g4 a4 25. Qa3 Nxc3+ 26. bxc3 Rc7xc3 27. Qb4 Rc3c4 28. Qb2 b4 29. h4 a3 30. Qb3 Qb5 31. h5 gxh5 32. gxh5 Qf5 33. h6 Rc4c3 34. Qxb4 Rxd3 35. Rd2xd3 g6 36. Qd4

[Assistant] Rb8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. d5 d6 3. c4 Nf6 4. Nc3 g6 5. e4 Bg7 6. Bh6 Bxh6 7. f3 Bg7

[Assistant] Nge2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2q1rk1/2p2pp1/7p/p1b1pN2/4P3/2pP1b2/P1Q2P2/R1B1K1R1 w Q - 0 21

[Assistant] Rxg7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Qc7 6. a3 g6 7. Nc3 Bg7 8. Be3 Ne7 9. h4 h5 10. Be2 Nbc6 11. Rc1 O-O 12. g4 Nxd4 13. Bxd4 Bxd4 14. Qxd4 hxg4 15. h5 Qf4 16. Kd1 Nc6 17. Qb6 Kg7 18. Kc2 d5 19. cxd5 exd5 20. exd5 Nd4+ 21. Kb1 Bf5+

[Assistant] Ka1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d5 3. exd5 cxd5 4. d4 Nf6 5. Be2 Nc6 6. g4 h6 7. h4 Ne4 8. Nxe4 dxe4 9. c3 e6 10. g5 hxg5 11. Bxg5 Be7 12. Bxe7 Qxe7 13. Qd2 Rxh4 14. Rxh4 Qxh4 15. Qe3 Bd7 16. O-O-O

[Assistant] O-O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 Nc6 2. Bg2 e5 3. Nf3 Nf6 4. d3 d5 5. O-O Bd6 6. e4 dxe4 7. dxe4 Nxe4 8. Nxe5 Bxe5 9. Qxd8+ Nxd8 10. Bxe4 O-O 11. c3 Bf6 12. Nd2 Bd7 13. Bg2

[Assistant] Bc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. h3 O-O 6. Bg5 Nbd7 7. e3 c5 8. d5 a6 9. a4 b6

[Assistant] Bh4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 d6 3. Nf3 Nf6 4. d4 cxd4 5. Qxd4 g6 6. Bb5+ Bd7 7. e5 dxe5 8. Nxe5 Bg7 9. Bg5 O-O 10. Bxf6 Bxf6 11. Bxd7 Bxe5 12. Qxe5 Nxd7 13. Qe2 Qc7 14. O-O-O Nf6 15. Nd5 Nxd5 16. Rxd5 Rfe8 17. Rhd1 Rac8 18. Rd7 Qxh2 19. Rxe7 Qf4+ 20. Kb1 Rxe7 21. Qxe7 Qxf2 22. Rd8+ Rxd8 23. Qxd8+ Kg7 24. a3 a5 25. Qd5 Qe1+ 26. Ka2 Qf2 27. Qxb7 Qxc2 28. Qb5 Qxg2 29. Qxa5

[Assistant] h5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2R5/1p4pk/4p1np/3pN3/1q1P2PP/3Q4/5r1K/8 w - - 0 28

[Assistant] Kh3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r7/Pk6/1r6/RP6/3P1P2/7K/7P/1R6 b - - 0 47

[Assistant] Rg6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/2B2p2/p5p1/P4p1p/3p1P1P/2k5/4K3/8 b - - 4 55

[Assistant] Kc2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r1rk1/p5p1/4pq2/5p1Q/1pppB2R/8/PP5P/5RK1 w - - 3 27

[Assistant] Bxf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r3k1nr/pppn1ppp/3qb3/3N4/3P1N2/6P1/PPP2Q1P/2K1RB2 w kq - 3 15

[Assistant] Nxe6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 d5 2. Nc3 d4 3. Ne4 Nc6 4. d3 Nf6 5. Ng3 e5 6. Nf3 h5 7. e4 h4 8. Ne2 h3 9. gxh3 Bxh3 10. Bxh3 Rxh3 11. Ng3 Rh8 12. Bd2 Be7 13. Qb3 a5 14. O-O-O Qd7 15. Nf5 Bf8 16. Rhg1 a4 17. Qc2 g6 18. Ng3 Ng4 19. Be1 Nxh2 20. Rh1 Nxf3 21. Rxh8

[Assistant] O-O-O


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 d6 2. Bg2 g6 3. d3 Bg7 4. Nf3 Nf6 5. O-O O-O 6. c3 Nbd7 7. Nbd2 Re8 8. Qc2 a5 9. e4 a4 10. a3 c6 11. d4 e5 12. Re1 Qc7 13. h3 Nf8 14. Nc4 exd4 15. cxd4 d5 16. Ncd2 dxe4 17. Nxe4 Bf5 18. Bf4 Qb6 19. Nxf6+ Bxf6 20. Qc3 Ne6

[Assistant] Be5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r2r1k/1R4pp/1p2P3/p7/PnP1pq2/1Q5P/4B1PN/4KR2 b - - 1 24

[Assistant] Qc1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g4 c6 2. f3 d5 3. e3 e5 4. Qe2 Nf6 5. d3 Bd6 6. Bd2 O-O 7. Nc3 e4 8. dxe4 dxe4 9. Nxe4 Nxe4 10. fxe4 Re8 11. O-O-O Rxe4 12. Bg2 Re8 13. Bf3 Qc7 14. h3 Be6 15. Kb1 Nd7 16. e4 Ne5 17. Bg2 Bc4 18. Qe1 a5 19. Bc3 a4 20. Nf3 Nxf3 21. Bxf3 Be5 22. Bxe5 Qxe5 23. Qc3 Qxc3 24. bxc3 Rad8 25. Kb2 Kf8 26. a3 Ke7 27. Kc1 Ke6 28. Rxd8 Rxd8 29. Rd1 Rxd1+ 30. Kxd1 Ke5 31. Kd2 Kf4

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 g6 2. e4 d6 3. Nf3 Nf6 4. e5

[Assistant] dxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 c5 3. g3 Nf6 4. Bg2 cxd4 5. Nxd4 e5 6. Nb3 Nc6 7. O-O Be6 8. Bg5 Be7 9. Nc3 d4 10. Bxf6 Bxf6 11. Ne4 Be7 12. c3 dxc3 13. bxc3 Qc7 14. Nec5 Bf5 15. e4 Bc8 16. Rb1 O-O 17. h4 b6 18. Nd3 Ba6 19. Qf3 Rad8 20. Rfd1 Bc4 21. Bh3 a5 22. a4 Bf6 23. Kh2 Ne7 24. Nbc1 Rd6 25. Nb2 Ba6 26. Rxd6 Qxd6 27. Ne2 Qa3 28. Nd1 Rb8 29. Ne3 Qxa4 30. Nd5 Nxd5 31. exd5 Qe8 32. Rd1 Qd8 33. Qe3 b5 34. f4 exf4 35. Nxf4 b4 36. cxb4 axb4 37. Bg2 b3 38. Rb1 b2 39. Qa3 Bc4 40. Qa4 Bb3 41. Qa3 Bc2 42. Rxb2 Rxb2 43. Qe3 Bf5 44. h5 h6 45. Kh1 Bg4 46. Kh2 Rc2 47. Qd3 Rc3 48. d6 Rxd3 49. Nxd3 Qxd6 50. Nf4 Bg5

[Assistant] Nh3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1k1r2nr/ppqbb3/4pP2/3p4/PP1N4/2P5/1B1NQPP1/2R1R1K1 b - - 0 21

[Assistant] Qh2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bg5 Ne4 3. h4 c5 4. d5 Qb6 5. Nd2 Nxg5 6. hxg5 Qxb2 7. g6 fxg6 8. Ngf3 Qf6 9. e4 d6

[Assistant] e5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nc6 2. Nf3 d6 3. d4 Bg4 4. c3 d5 5. exd5 Qxd5 6. Be2 Nf6 7. h3 Bf5 8. Bf4 O-O-O 9. Qb3 e6 10. Nbd2 h6 11. Bc4 Qd7 12. Bb5 Qd5 13. Bc4 Qd7 14. Bb5 Nd5 15. Ne5 Nxe5 16. Bxd7+ Nxd7 17. Bh2 f6 18. O-O g5 19. Rfe1 h5 20. c4 N5b6 21. Ne4 g4 22. h4 Be7 23. a4 Na8 24. a5 a6 25. Bg3 Rhe8 26. Rad1 Kb8 27. d5 Bxe4 28. Rxe4 Nc5 29. Qe3 Nxe4 30. Qxe4 exd5 31. Qg6 dxc4 32. Rxd8+ Rxd8 33. Qxh5 Rd4 34. Qe8+ Bd8 35. h5 Kc8

[Assistant] h6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/5p1p/p2k2p1/P1pP2P1/5P1P/3K4/8 w - - 2 40

[Assistant] Kc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. Nc3 O-O 7. b3 d6 8. Bb2 Nbd7 9. d4 Re8 10. d5 e5 11. e4 Bf8 12. b4 g6 13. Ne1 h5 14. Nd3 Bg7 15. h3 a5 16. a3 Ba6 17. Qb3 Rb8 18. Nb5 Bb7 19. Bc3 Qc8 20. bxa5 bxa5 21. Bxa5 Ba6 22. a4 c6 23. dxc6 Qxc6 24. Nb4 Qa8 25. Nc7 Nc5 26. Qc2 Qb7 27. Nxe8 Rxe8 28. Nd5 Nxd5 29. exd5 Qb3 30. Rfc1 Qxc2 31. Rxc2 Nb3 32. Bc3 Nxa1 33. Bxa1 e4 34. Bxg7 Kxg7 35. c5 Bd3 36. Rc3 dxc5 37. Rxc5 Ra8 38. a5 Kf6 39. Bf1

[Assistant] Ke5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. c4 e6 3. Nc3 d5 4. e4 dxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. Nf3 h6 8. Bd3 Nd7 9. O-O Bd6 10. Qe2 Bf4 11. Re1 Bxc1 12. Raxc1 O-O 13. Ne5 Nxe5 14. dxe5 Qe7 15. c5 b6 16. Be4 bxc5 17. Qc4 Bb7 18. b3 Rad8 19. Qxc5 Qc7 20. g3 Rd7 21. f4 Rfd8 22. h4 Rd2 23. Rc2 Qd7 24. Re2 Rd1+ 25. Kf2 Ra1 26. Rc1 Rxc1 27. Qxc1 c5 28. Qe3 Bxe4 29. Qxe4 Qb5 30. Qc4 Qb6 31. Rc2

[Assistant] Rd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. b3 Nc6 3. Bb2 e5 4. Bc4 d6 5. Nc3 Be6 6. Nge2 Be7 7. O-O Nf6 8. f4 Bxc4 9. bxc4 O-O 10. d3 Nd4 11. fxe5

[Assistant] dxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 Bxc3+ 6. Nxc3 Bb7 7. f3 O-O 8. Bd3 d5 9. O-O Nbd7 10. cxd5 Nxd5 11. e4 e5 12. exd5 exd4 13. Ne4 Bxd5 14. b3 Be6 15. Bb2 g6 16. Bxd4 c5 17. Bb2 f5 18. Nf2 Rf7 19. Bc2 Qf8 20. Qd2 Rd8 21. Qc3 Nf6 22. Rad1 Re8 23. Rde1 b5 24. Re2 b4 25. Qd2 Nd5 26. Rfe1 a5 27. Rxe6 Rxe6 28. Rxe6 c4 29. bxc4 Nf6 30. Qd4 Kg7 31. Rxf6 Rxf6 32. Qxf6+ Qxf6 33. Bxf6+ Kxf6 34. c5

[Assistant] a4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2q2k1/pp1n2pp/2pb1pb1/3p1n2/3P2P1/2NB1N1P/PPPQ1P2/R1B1r1K1 w - - 0 16

[Assistant] Qxe1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. d4 g6 5. Nc3 Bg7 6. cxd5 cxd5 7. Bd3 O-O 8. h3 a6 9. Ne5 Nc6 10. f4 Nxe5 11. fxe5 Ne8 12. O-O f6 13. exf6 exf6 14. Bd2 f5 15. Ne2 Rf6 16. Nf4 Rf8 17. Qb3 Nf6 18. Bb4 Re8 19. Rae1 Qb6 20. Nxd5 Nxd5 21. Qxd5+ Be6 22. Qc5 Qxc5 23. Bxc5 Bxa2 24. b4 Bd5 25. Kf2 Re6 26. Rc1 b6 27. Bxb6 Rxb6 28. Rc5

[Assistant] Bf7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. a3 d5 3. exd5 Qxd5 4. Nf3 Nf6 5. Nc3 Qe6+ 6. Be2 Nc6 7. d4 cxd4 8. Nxd4 Nxd4 9. Qxd4 a6 10. O-O Qd7 11. Qc4 e6 12. Rd1 Qe7 13. Na4 Nd5 14. Bf3

[Assistant] Bd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3

[Assistant] e6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Ne8 10. Nd3 f5 11. Bd2 Nf6 12. f3 f4 13. c5 g5 14. Rc1 Ng6 15. cxd6 cxd6 16. Nb5 Rf7 17. a4 a6 18. Na3 Bf8 19. Nf2 h5 20. h3 g4 21. fxg4 hxg4 22. hxg4

[Assistant] Rh7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 g6 3. Nc3 Bg7 4. d4 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 Qa5 8. O-O O-O 9. f3 d6 10. a3 a6 11. Nxc6 bxc6 12. b4 Qc7

[Assistant] Bb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 d5 2. Bb2 c6 3. e4 Kd7 4. exd5 cxd5 5. Nc3 e6

[Assistant] Nf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/2p3kp/1p5P/p5K1/P1P5/1P6/8 b - - 0 45

[Assistant] Kf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nf6 2. e5 Nd5 3. Nc3 Nb6 4. d4 e6 5. Nf3 d6 6. Bd3 Nc6 7. Qe2 Be7 8. Bf4 O-O 9. O-O-O f6 10. exd6 cxd6 11. h4 e5 12. dxe5 dxe5 13. Be3 Bg4 14. h5 f5 15. Bc4+ Kh8 16. Rxd8 Raxd8 17. Be6 e4 18. Nxe4 fxe4 19. Bxg4 exf3 20. gxf3 Bf6 21. h6 g6 22. Bxb6 axb6 23. c3 Rde8 24. Qd2 Ne5 25. Re1 Nc4 26. Rxe8 Rxe8 27. Qd7 Rf8 28. Be6 Bg5+

[Assistant] Kc2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Be7 10. Nc3 h6 11. Ne2 c5 12. Rd1+ Ke8 13. c4 b6 14. b3 g5 15. Bb2 Rg8 16. Ng3 Ng7 17. Ne4 Be6 18. Nf6+ Bxf6 19. exf6 Nf5 20. g4 Nd6 21. Be5 Rd8 22. Rd2 Kd7 23. Rad1 Kc6 24. Kg2 h5 25. Nh2 hxg4 26. hxg4 Rh8 27. f3 Nb7 28. Rxd8 Rxd8 29. Rxd8 Nxd8 30. Nf1 b5 31. cxb5+ Kxb5 32. Ng3 c6 33. Ne4 c4 34. bxc4+ Bxc4 35. a3 Ne6 36. Bc3 Nf4+ 37. Kf2 Ka4 38. Nxg5 Kxa3 39. Bd2 Nd3+ 40. Ke3 Kb3 41. Nxf7 Nb4 42. Bxb4 Kxb4 43. Ne5 a5 44. Nxc4 Kxc4 45. f7 a4 46. f8=Q

[Assistant] a3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: k3b3/1r6/p2Qp2p/B3Ppp1/8/2P2P2/q5PP/5K2 w - - 4 42

[Assistant] Qxa6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5bk1/p4pp1/8/2p5/N7/P2p2QP/1PP2RK1/4q3 b - - 1 36

[Assistant] dxc2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r3k2r/ppp1qppp/2b1p3/1B6/3P4/7P/PPP1QPP1/R3K2R b KQkq - 1 14

[Assistant] Qb4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. f3 e5 5. Nge2 exd4 6. Nxd4 g6 7. Be3 Bg7 8. Qd2 O-O 9. O-O-O a6 10. Bh6 b5 11. Bxg7 Kxg7 12. g4 b4 13. Na4 Bb7 14. Kb1 a5 15. h4 c5 16. Nb5 Nxg4 17. Nxd6 Bc6 18. fxg4 Bxa4 19. h5 g5 20. Nf5+ Kg8 21. Bc4 Ne5 22. Bd5

[Assistant] Rc8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g4 h5 2. Bg2 Nc6 3. h3 hxg4 4. hxg4

[Assistant] Rxh1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/2P5/8/4K3/p7/P4p1k/6p1/8 w - - 0 51

[Assistant] c8=Q+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. c3 Nf6 6. e5 Ne4 7. Bb5 d5 8. cxd4 Bb6 9. O-O O-O 10. Bxc6 bxc6 11. h3 c5 12. Be3 cxd4 13. Bxd4 c5 14. Be3 d4 15. Nbd2 Bb7 16. Bf4 f6 17. Re1 Nxd2

[Assistant] Nxd2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1bq1k1r/pp3Nbp/2nNp1p1/2ppPn2/P4P2/8/1PPP2PP/R1BQKB1R b KQ - 0 10

[Assistant] Qh4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. e5 Nc6 6. Qf4 Nd5 7. Qe4 Ndb4 8. Na3 d5 9. exd6 Qxd6

[Assistant] Bc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. c4 d5 3. Nf3 Nf6 4. Nc3 a6 5. cxd5 cxd5 6. Bf4 Nc6 7. e3 Bf5 8. Be2 e6

[Assistant] Nh4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. Nc3 dxe4 3. Nxe4 e5 4. Ng3 Nf6 5. Qf3 Nc6 6. Bc4 Nd4 7. Qd1 h5 8. c3 Nf5 9. Nxf5 Bxf5 10. Qb3 Qd7 11. Qxb7 Be4 12. Bb5 Bxb7 13. Bxd7+ Nxd7 14. f3 Bd6 15. Ne2 O-O 16. Ng3 g6 17. Ne4 f5 18. Ng5 Rae8 19. d3 Be7 20. O-O Bxg5 21. Bxg5 e4 22. fxe4 fxe4 23. d4 Rxf1+ 24. Rxf1 Rf8 25. Re1 Rf5 26. Be3 Nf6 27. c4 Ng4 28. d5 Nxe3 29. Rxe3

[Assistant] Re5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nc3 Nc6 3. Nf3 Nd4 4. Bc4 Nxf3+ 5. Qxf3 e6 6. O-O Nf6 7. d4 cxd4 8. Ne2 e5 9. c3 dxc3 10. Nxc3 Be7 11. Bg5 h6 12. Bxf6 Bxf6 13. Rad1 O-O 14. Nd5 d6 15. Nxf6+ Qxf6 16. Qxf6 gxf6 17. Rxd6 Kg7 18. Re1 a6 19. Re3 Be6 20. Bxe6 fxe6 21. Rxe6 Kf7 22. Rd6 Rfe8 23. Rh3 Kg6 24. Rf3 Rf8 25. h3 Rac8 26. Rb6 Rc7 27. g4 Rff7 28. Kg2

[Assistant] Rc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 f5 2. Nf3 Nf6 3. Nc3 d5 4. g3 e6 5. Ne5 c5 6. Bf4 Nc6 7. e3 Bd6 8. Bb5 Bd7 9. Nxd7 Qxd7 10. Bxd6 Qxd6 11. O-O O-O 12. a4 Ne7 13. Be2 g5 14. Bf3 Ng6 15. Bg2 Rac8 16. Rc1 f4 17. Nb5

[Assistant] Qb8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/ppr2k2/2p1R1R1/8/3PP3/2r3PK/8/8 w - - 2 37

[Assistant] Ref6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d6 2. Nf3 Nd7 3. c3 e5 4. Bg5 f6 5. Bh4 g5 6. Bg3 g4 7. Nh4 Ne7 8. e3 f5 9. Bd3 e4 10. Bc4 Bg7 11. Nxf5 Nxf5 12. Qxg4 Nf6 13. Qg5 d5 14. Bb3 c6 15. Be5 Be6 16. Nd2 Qe7 17. f3 O-O-O 18. f4 h6 19. Qg6 Nd6 20. Bxd6 Rxd6 21. f5 Rdd8 22. fxe6 Rhg8 23. Qg3 Bh8 24. Qf2 Rdf8 25. Rf1 Qxe6 26. Qe2 Nd7 27. O-O-O Rg7 28. g3 Rgg8 29. Rxf8+ Rxf8 30. Rf1 Bf6 31. Qg2 Be7

[Assistant] Rxf8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. e3 g6 3. d4 Bg7 4. c3 O-O 5. g3 d6 6. Bg2 Nbd7 7. O-O e5 8. Re1 Re8 9. Nfd2

[Assistant] c6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. g3 c5 3. Bg2 g6 4. Nf3 Bg7 5. Nc3 O-O 6. O-O d6 7. d3 e5 8. a3 Nc6 9. Rb1 a5 10. Ne1 h6 11. Nc2 Be6 12. Ne3 Nd4 13. Ned5 Nxd5 14. Nxd5 Bxd5 15. Bxd5 Rb8 16. b4 axb4 17. axb4 b6 18. e3 Ne6 19. Bd2 Nc7 20. Qf3 Kh7 21. h4 f5 22. Bc6 h5 23. bxc5 bxc5 24. Ba5 Qe7 25. Bb7 Ne6 26. Bd5 f4 27. Bxe6 Qxe6 28. Rxb8 Rxb8 29. exf4 exf4 30. Qxf4 Rf8 31. Qe4 Qf7 32. Bd2 Bd4 33. Kg2 Re8 34. Qf3 Qe6 35. Re1 Qd7 36. Rxe8 Qxe8 37. Qe4 Qf7 38. Be3 Be5 39. Qd5 Qxd5+ 40. cxd5 Kg7 41. Kf3 Kf6 42. Ke4 Bc3 43. d4 c4 44. Bg5+ Kf7 45. Ke3 Bb4 46. Ke2 Ke8 47. Bd2 Ba3 48. Kd1 Bb2 49. Be3

[Assistant] Bc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 4r1k1/1qr4p/3P2pQ/1pR2p2/2p2P2/2P3PP/2P3BK/R7 b - - 0 39

[Assistant] Re2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/4kp1p/8/p2pP3/3K1P2/1pP5/1P5P/8 w - - 2 34

[Assistant] Kxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c6 2. Nc3 d6 3. Nf3 g6 4. d4 Bg7 5. e5 Nf6 6. exd6 O-O 7. Be3 exd6 8. Bd3 d5 9. O-O Bg4 10. Re1 Bxf3 11. Qxf3 Nbd7 12. Bg5 Re8 13. Bxf6 Nxf6 14. Rxe8+ Qxe8 15. Rd1 Qd7 16. Qe2 Re8 17. Qd2 Re7 18. Re1 Qe8 19. Rxe7 Qxe7 20. Qe2 Qd7 21. Nd1 Kf8 22. c3 Bh6 23. Ne3 Bxe3 24. Qxe3 Qe6 25. Qxe6 fxe6 26. f3 Ke7 27. Kf2 Kd6 28. Ke3 e5 29. Kd2

[Assistant] g5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. f4 Nc6 3. Nf3

[Assistant] exf4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e3 c5 2. d3 Nc6 3. Ne2 g6 4. g3 Bg7 5. Bg2 Nf6 6. O-O O-O 7. c4 d5 8. cxd5 Nxd5 9. Nbc3 Nxc3 10. Nxc3 Be6 11. Qa4 Qd7 12. Rd1 Rac8

[Assistant] Qb5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/8/7p/pKp1k3/8/5P1P/6P1/8 b - - 3 45

[Assistant] Kd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3r3k/6p1/1p5p/8/2Q5/1P1p3P/4q1PB/5RK1 b - - 3 36

[Assistant] Qxf1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 Bg4 3. e3 Bxf3 4. Qxf3 Nf6 5. Bd3 Nc6 6. Nd2 e5 7. dxe5 Nxe5 8. Qe2 Nxd3+ 9. cxd3 Be7 10. O-O c5 11. h3 O-O 12. b3 Bd6 13. Bb2 Bc7 14. Qf3 Qd6 15. g3 Rfe8 16. Bxf6 Qxf6 17. Qxf6 gxf6 18. Rac1 Rad8 19. Rxc5 Bb6 20. Rc2 d4 21. e4 f5 22. Nc4 fxe4 23. Nxb6 exd3 24. Rd2 axb6 25. Rfd1 Re2 26. Rxd3 Rde8 27. Rxd4 Rxa2 28. Rd8 Rxd8 29. Rxd8+ Kg7 30. Rd6 Rb2 31. Rxb6 Rb1+ 32. Kg2

[Assistant] Rxb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 dxc4 5. Bxc4 e6 6. Nf3 Bb4 7. O-O O-O 8. Qe2 Nbd7 9. e4 Qc7 10. e5 Nd5 11. Ne4 Re8 12. Rd1 Nf8

[Assistant] h4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2Q4r/p2nk3/4p2p/3p1pp1/3P4/3qP2P/PK1B4/R7 w - - 2 32

[Assistant] Bb4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r1k3/1b2pp2/p2p2r1/3N3p/1p1QP2P/8/PPq3P1/K2R3R w - - 0 23

[Assistant] Qh8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/7k/7p/p2q1p2/Pp6/4P1rP/2Q3P1/5R1K w - - 1 42

[Assistant] Rxf5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 7k/8/1p5b/p1p4Q/2P1Br1P/PP1P1Pq1/6R1/6K1 b - - 2 41

[Assistant] Qe1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c6 2. g3 d6 3. Bg2 g6 4. d3 Bg7 5. Nbd2 Nf6 6. O-O O-O 7. e4 Qc7 8. Re1 Bg4 9. h3 Bxf3 10. Nxf3 Nbd7 11. c3 Rfd8 12. d4 e5 13. dxe5 Nxe5 14. Qc2 Qe7 15. Nxe5 dxe5 16. Be3 Re8 17. b4

[Assistant] Qc7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nc3 c5 2. Nf3 Nc6 3. e4 e5 4. Bc4 d6 5. d3 Be7 6. h3 Nf6 7. O-O O-O 8. Be3 a6 9. a3 b5 10. Bd5 Nd4 11. Bxa8 Be6 12. Bd5 Nxd5 13. Nxd5 Bxd5 14. exd5 f5 15. Bxd4 cxd4 16. c4 bxc4 17. dxc4 Bf6 18. b4 Qb6 19. Rb1

[Assistant] e4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c3 e6 3. Nf3 b6 4. e4 Bb7 5. e5 Nd5 6. Bg5 Be7 7. Bxe7 Nxe7 8. Bd3 d6 9. Qe2 O-O 10. exd6 Qxd6 11. Be4 Bxe4 12. Qxe4 Nd7 13. Ng5 Nf6 14. Qh4 h6 15. Nf3 Nf5 16. Qe4 Nxe4 17. O-O Ng5 18. Ne5

[Assistant] c5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 2r4k/6pp/4qb2/2Bp4/1Pb1p3/4P1P1/r4P1P/1QRR1BK1 b - - 4 25

[Assistant] Rb2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/p6n/4p3/Q4Pp1/2b3P1/7P/Pr1p1qB1/5R1K w - - 0 34

[Assistant] Qd8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. Nf3 Nxe4 5. Nxe5 Bc5 6. d4 Bb4 7. Bd2 Bxc3 8. bxc3 Qh4+ 9. g3 Nxg3

[Assistant] Nf3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 d6 2. Bb2 Nf6 3. e4 g6 4. f4 Bg7 5. Nf3 Bg4 6. Qe2 O-O 7. d4 c6 8. c4 Qa5+

[Assistant] Nc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nc6 2. Nf3 e5 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+

[Assistant] Kxd8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r1bq1rk1/ppbn2pp/2p1p3/4Np2/3P1B2/2PBP2Q/PP3PPP/R3K2R b KQ - 1 13

[Assistant] Nxe5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 f5 2. Nf3 Nf6 3. e4 fxe4 4. Ne5 d6 5. Nc4 c6 6. Ne3 d5 7. c4 e6 8. Nc3 Bd6 9. f3 O-O 10. fxe4 Nxe4 11. Nxe4 dxe4 12. Be2 Qh4+ 13. g3 Bxg3+ 14. hxg3 Qxh1+ 15. Kd2 Qxd1+ 16. Kxd1 e5 17. dxe5 Be6 18. Bd2 Na6 19. Kc2 Nc5 20. Bb4 b6 21. Bxc5 bxc5

[Assistant] Rd1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bd3 Bg4 6. O-O Be7 7. Bg5 O-O 8. Nbd2 h6 9. Bh4 c5 10. dxc5 Bxc5 11. h3 Be6 12. Re1 Nc6 13. Nb3 Bb6 14. c3 Qd6 15. Bxf6 gxf6 16. Qd2 Kg7 17. Rad1 Qg3 18. Nbd4 Nxd4 19. Nxd4 Qg5 20. Nxe6+ fxe6 21. Rxe6 Rae8 22. Qxg5+ hxg5 23. Rxe8 Rxe8

[Assistant] Kf1


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r2qkb1r/pp3ppp/2n2n2/2p1p3/4NPb1/3P2P1/PPP3BP/R1BQK1NR w KQkq - 1 8

[Assistant] Nxf6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nc6 2. Nf3 f5 3. exf5 Nf6 4. d4 d5 5. Bd3 Nb4 6. O-O Nxd3 7. Qxd3 Qd7 8. c4 Qxf5 9. Qxf5 Bxf5 10. Nc3 O-O-O 11. c5 e6 12. Ne5 Re8 13. Bg5 c6 14. Rfe1 Be7 15. b4 Ne4 16. Nxe4 Bxe4 17. Bxe7 Rxe7 18. f3 Bf5 19. a4 a6 20. b5 cxb5 21. axb5 axb5 22. Ra8+ Kc7 23. Rxh8 h6 24. g4 Bc2 25. Rc1 Bb3 26. Rg8 Bc4 27. h4 b6 28. c6 b4 29. Nxc4 dxc4 30. Rxc4 b3 31. Rb4 Kxc6 32. Rxb3 Rd7 33. Rb8 Kd5 34. R8xb6 Kxd4 35. Rxe6 Kd5 36. Re4 Kc5 37. Rc3+ Kb5 38. Rb3+ Kc5 39. Rb6 Kxb6 40. Kg2 Kc5 41. Kg3 Kd5 42. Rf4 Re7 43. Rf5+ Ke6 44. h5 Rd7 45. Rf4 Rd1 46. Re4+ Kf6 47. Kf4 Rd7 48. Ra4 Kf7 49. Kg3 Kg8 50. f4 Kh7 51. Kh4 Rd1 52. g5 Rh1+ 53. Kg4 Rg1+ 54. Kf5

[Assistant] hxg5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r3r1k/1q3Pp1/4QR1p/8/1p5P/2p3P1/P6K/3R4 b - - 1 35

[Assistant] gxf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 7k/5p2/8/pp5N/4qP1P/8/PP4RK/8 w - - 8 39

[Assistant] Rg8+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. e3 e6 3. Nf3 c5 4. Be2 cxd4 5. exd4 b6 6. c3 Bb7 7. Bf4 Be7 8. Nbd2 O-O 9. Bxb8 Rxb8 10. O-O d6 11. Re1 Qd7 12. a3 Ba8 13. Bf1 a6 14. Qe2 b5 15. a4 Bc6 16. axb5 axb5 17. Nb3 Ra8 18. Na5 Bd5 19. Qxb5 Qxb5 20. Bxb5 Bxf3 21. gxf3 Rfb8 22. c4 d5 23. Nc6 Rxa1 24. Nxe7+ Kf8 25. Rxa1 Kxe7 26. b3 dxc4 27. bxc4 Nh5 28. Ra7+ Kf6 29. Kg2 Nf4+ 30. Kg3 Ne2+ 31. Kg2 Nxd4 32. Ra5 Nxb5 33. cxb5 Ke7 34. f4 Kd6 35. Kg3 Rb7 36. Ra6+ Kc5 37. b6 Kc6 38. Kg4 Rxb6 39. Ra7 Rb7 40. Ra8 Kd7 41. Rh8 h6 42. Rg8 g6 43. Rh8 h5+ 44. Kg5 Ke7 45. Rh7 Rb5+ 46. Kh4 Kf6 47. Rh8 Rf5 48. Kg3 Rb5 49. Rc8 Rb3+ 50. f3 Rb4 51. Rc5 Rb1 52. Rc6 Rg1+ 53. Kf2 Rh1 54. Kg2 Rd1 55. Rc2 Rd4 56. Rf2 Rxf4 57. Kg3 Rf5 58. Re2 Kg5 59. Kf2 f6 60. Kg2 e5 61. Re3 Rf4 62. Re2 Kf5 63. Re3

[Assistant] g5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 O-O 9. O-O-O Nbd7 10. g4 h6 11. Bxf6 Bxf6 12. h4 Qb6 13. Nb3 Bxc3 14. Qxc3 Nc5 15. Nxc5 Qxc5 16. Qxc5 dxc5 17. e5 b5 18. Bg2 Ra7 19. Rd6 Rc7 20. Rhd1 g5 21. fxg5 hxg5 22. hxg5 Kg7 23. Be4 Rh8 24. Rd8 Rxd8 25. Rxd8 Bb7 26. Bxb7 Rxb7 27. Rd6 Ra7 28. Kd2 Kg6 29. Ke3 Kxg5 30. Kf3 c4 31. Rc6 a5 32. b3 cxb3 33. cxb3 b4 34. Rc5 a4 35. Rc4 axb3 36. axb3 Ra5 37. Ke4 Rb5 38. Rc7 Kg6 39. Kd4 Rd5+ 40. Kc4 Rxe5 41. Kxb4 Re4+ 42. Rc4 Re5 43. Kc3 Kg5 44. b4 Re3+ 45. Kd4 Rb3 46. Kc5 f5 47. gxf5 exf5 48. b5

[Assistant] f4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/3r4/4k2p/KP4p1/4B1P1/5P2/8/8 w - - 1 49

[Assistant] Bf5+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3 Bg7 5. g3 f5 6. Bg2 O-O 7. Ne2 d6 8. O-O c5 9. c4 Nc6 10. Nbc3 Rb8 11. Rc1 a6 12. b3 Re8 13. Qd2 g5 14. Rfd1 Qa5 15. h3 h6 16. Kh2 Qb4 17. Qc2 Qa5 18. Nd5 Nb4 19. Nxb4 Qxb4 20. Nc3 cxd4 21. exd4 Be6 22. Nd5 Bxd5 23. Bxd5 Re7 24. Qxf5 Rf8 25. Rc2 Qb6 26. c5 dxc5 27. dxc5 Qc7 28. Be4 Rfe8 29. Qh7+ Kf8 30. Bf3 Qe5 31. Rd6 f5 32. Bd5 Rf7 33. Bxf7 Kxf7 34. Rd7+ Re7

[Assistant] Rxe7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. g3 c5 2. Bg2 Nf6 3. Nf3 e6 4. O-O b6 5. d3 Bb7 6. Nbd2 d6 7. e4 Qc7 8. c3 Be7 9. Qe2 Nbd7 10. d4 O-O 11. e5 Nd5 12. Re1 cxd4 13. cxd4 dxe5 14. dxe5 a5 15. Ne4 Ba6 16. Qd2 Nc5 17. Nxc5 Bxc5 18. Qg5 Qe7 19. Qh5 Rfd8 20. Bg5 f6 21. exf6 gxf6 22. Bh6 Qf7 23. Qg4+ Qg6 24. Qxe6+

[Assistant] Qf7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Nf6 6. Be2 Bg4 7. h3 Bh5 8. c4 Qd7 9. d5 Nd4 10. Nxd4 cxd4 11. Bxh5 e5 12. dxe6 Qxe6+ 13. Kf1 O-O-O 14. Bf3 Bc5 15. Nd2 Rhe8 16. b4 Bxb4 17. Rb1 a5 18. a3 Bxd2 19. Bxd2 Qxc4+ 20. Kg1 Ne4 21. Bf4 Nc3 22. Bxb7+ Kd7 23. Qg4+ Re6 24. Re1 Re8 25. Kh2

[Assistant] Qb5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. e5 c5 3. Nf3 Nc6 4. Bb5 Bg4 5. d3 e6 6. O-O Ne7 7. Bf4 Ng6 8. Bg3 h5 9. h3 Bxf3 10. Qxf3 Qb6

[Assistant] Bxc6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e5 2. d5 Bc5 3. c4 d6 4. Nc3 f5 5. Na4 Bb6 6. Nxb6 axb6 7. Nf3 Nf6 8. Bg5 O-O 9. g3 h6 10. Bxf6 Qxf6 11. Bg2 Nd7 12. O-O Rf7 13. Nh4 Nf8

[Assistant] f4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5 Nd5 7. Qg4 O-O 8. Bh6 g6 9. Bxf8 Qxf8 10. Ne2 Nc6 11. Qg3 Qc5 12. O-O-O Nxc3 13. Nxc3 Bxc3 14. Qxc3 Qxc3 15. bxc3 Nxe5 16. Be2 f6 17. Rhe1 Kf8 18. f4 Nf7 19. Bf3 Rb8 20. h4 b6 21. h5 g5 22. g3 h6 23. Rd4 Ke7

[Assistant] Ra4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 O-O 5. g3 d6 6. Bg2 c5 7. O-O Nc6 8. d5 Na5 9. Qd3 e5 10. e4 a6 11. h3 b5 12. cxb5 axb5 13. Nxb5 Ba6 14. a4 c4 15. Qc2 Nb3 16. Ra3 Nxc1 17. Rxc1 Qb8 18. Nd2 Bh6 19. Nc3 Rc8 20. Rf1 Qb4 21. f4 exf4 22. gxf4 Nh5 23. f5 Qc5+ 24. Kh2 Qe3 25. Rf3 Qxd2 26. Qxd2 Bxd2 27. fxg6 hxg6 28. e5 Bf4+ 29. Kg1 Bxe5 30. Ne4 Bxb2 31. Ra2 Be5 32. Bf1 c3 33. Bxa6 c2 34. Rxc2

[Assistant] Rxc2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/6p1/8/5p2/p4P2/B1P1K3/P7/4n3 b - - 3 43

[Assistant] Nc2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 4. Nc3 e6 5. Bg5 Bb4 6. Qc2 h6 7. Bd2 Bxf3 8. gxf3 c5 9. a3 Bxc3 10. Bxc3 cxd4 11. Bxd4 Nc6 12. Bc3 Rc8 13. e4 d5 14. Rd1 d4 15. Qa4 e5 16. Bd2 O-O 17. Rg1 Kh7 18. Bh3 Rc7 19. f4 Qe7 20. Qc2 Nh5 21. f5 Qh4 22. Qd3

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. c4 c5 3. Nc3 e5 4. dxe5 d4 5. Ne4 Nc6 6. Ng3 f6 7. e3 fxe5 8. exd4 exd4 9. Nf3 Nf6 10. Bg5 Bd6 11. Bxf6 Qxf6 12. Bd3 O-O 13. O-O Bg4 14. h3 Bxf3 15. Qxf3 Qxf3 16. gxf3 Rf4 17. Be4 Ne5 18. Ne2 Rh4 19. Kg2 Rf8 20. Bd5+ Kh8 21. f4 Nd3 22. Kh2 Nxf4 23. Rg1 Nxe2+ 24. Kg2 Nxg1 25. Kxg1 Rhf4 26. Kf1 Rxf2+ 27. Kg1 Bg3 28. Rd1 h5 29. Kh1 Bf4 30. Bg2 Be3 31. Rf1 Rxf1+ 32. Bxf1 Rxf1+ 33. Kg2 Rf2+ 34. Kg3 Rc2 35. Kh4

[Assistant] Rxc4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: Qnbq1rk1/p4ppp/8/1B6/4p1n1/2N2N2/PPPP2PP/R1BQ2KR b - - 2 10

[Assistant] Qb6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5bk1/6pp/p2qp3/1p1bN3/3PpQ2/4B3/Pr4PP/R5K1 w - - 2 25

[Assistant] Qf7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r6r/1p1R1pk1/p3p1p1/4p1P1/1PB1Q1K1/2q5/8/8 w - - 4 37

[Assistant] Rxf7+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1r2r1k1/p4pbp/3p2p1/q1pP1b2/2n2P2/2NB1N1P/P2Q1KP1/1RR5 w - - 0 23

[Assistant] Rxb8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r6k/1R3Kp1/5p1p/1Pb1p2P/8/p7/B5P1/8 w - - 1 54

[Assistant] Kg6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 a6 6. h3 Nc6 7. a4 Bf5 8. Bc4 Nb4 9. Bb3 e6 10. Nh4 Bg6 11. Nxg6 hxg6 12. Bg5 c5 13. dxc5 Bxc5 14. Qf3 Be7 15. Rb1 Rh5 16. Rd1 Qc7 17. Bf4 Qc6 18. Qxc6+ Nxc6 19. O-O Bc5

[Assistant] Bd6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 d6 5. h3 Nge7 6. Nge2 Be6 7. d3 O-O 8. g4 d5 9. Ng3 d4 10. Nce2 f6 11. O-O Qd6 12. f4 Rf7 13. f5 Bd7 14. h4 b5 15. g5 Rff8 16. Kh2 Rae8 17. Bh3 Nc8 18. Bd2 Re7 19. a3 Rff7 20. b4 Bb6 21. Qb1 Kf8 22. Qb3 Ke8 23. g6 hxg6 24. fxg6 Rf8 25. Nf5 Bxf5 26. Bxf5 Kd8 27. Kg3 Ree8 28. h5 Nc8e7 29. Kg4 Nxf5 30. exf5 Kc8 31. Ng3 Kb7 32. Ne4 Qe7 33. Rh1 Rd8 34. h6 gxh6 35. Rxh6 Rg8 36. Rah1 Rg7 37. Rh7 Rdg8 38. Rxg7

[Assistant] Qxg7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1k6/8/1p1R1N2/2pPp3/pqP1PpB1/3K4/8/8 w - - 0 53

[Assistant] Rxb6+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 Nc6 2. Nf3 d6 3. d4 Bg4 4. Bb5 Bxf3 5. Qxf3 a6 6. Bxc6+ bxc6 7. c3 g6 8. h4 Bg7 9. h5 Nf6 10. h6 Bf8 11. Bg5 Qd7 12. b3 O-O-O 13. Na3 Ng8 14. Qe2 f6 15. Qxa6+ Kb8 16. Be3 Qc8 17. Qa5 Qb7 18. O-O Bxh6 19. f4

[Assistant] e5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. g3 b5 3. Bg2 d5 4. cxb5 Bb7 5. Nc3 e5 6. d4 e4 7. Nh3 Bb4 8. O-O Qd7 9. Qb3 Bd6 10. Bg5 Qe6 11. Nf4 Bxf4 12. Bxf4 Qd7 13. Be5 O-O 14. f3 exf3 15. Bxf3 Ne4 16. Bxe4 dxe4 17. e3 a6 18. bxa6 Bxa6 19. Rf2 Nc6 20. Nxe4 Nxe5 21. dxe5 Rab8

[Assistant] Qc3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 e6 2. d3 b6 3. Nd2 Bb7 4. g3 g6

[Assistant] Bg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 6k1/2q2pb1/1p4Q1/p2B3p/8/1P4P1/P6P/7K b - - 0 31

[Assistant] Qc1+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4r1k/bp4pp/p1p1pq2/8/P5Q1/1BP1B2P/1P3nP1/R4RK1 w - - 0 23

[Assistant] Qg3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 d5 2. Nf3 e6 3. Bf4 f5 4. e3 Nf6 5. Ne5 c6 6. Nd2 Bd6 7. Ndf3 O-O 8. Bd3 Qb6 9. Rb1 Qa5+ 10. c3 Qxa2 11. O-O Qa5 12. b4 Qd8 13. h3 a6 14. c4 Ne4 15. b5 Bxe5 16. Nxe5 Nd7

[Assistant] bxc6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/3r2p1/p4p2/7r/3pR2P/1R4K1/P1k1p3/8 w - - 0 43

[Assistant] Rxe2+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 e6 2. c4 Be7 3. Nc3 d6 4. e4 Nd7 5. f4 b6 6. Nf3 c5 7. d5 e5 8. fxe5 Nxe5 9. Nxe5 dxe5 10. Be2 Nf6 11. O-O a6 12. Be3 Bd7 13. Qd2 Qc8 14. Rf2 Bg4 15. Raf1 Bxe2 16. Qxe2 Qd7 17. Bg5 h6 18. Bxf6 Bxf6 19. Rxf6 gxf6 20. Rxf6 Qc7 21. d6 Qd7 22. Nd5 Rc8 23. Nxb6 Qc6 24. Nxc8 Qxc8 25. Qf3 Qd7 26. Qh5 Kd8 27. Rxh6 Rxh6 28. Qxh6 Kc8 29. Qf6 Kb7 30. Qe7 Kc6 31. Qxd7+ Kxd7 32. h4 Kxd6 33. g4 Ke6 34. h5 Kf6 35. Kf2 Kg5 36. Ke3 f6 37. Kd3 Kxg4 38. h6 f5

[Assistant] h7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 e6 6. Nc3 Nf6 7. O-O Be7 8. d4 cxd4 9. Nxd4 O-O 10. Qe2 a6 11. Rd1 Qc7 12. Bg5

[Assistant] Nbd7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Nf3 O-O 6. Bd3 Bg4 7. O-O Nc6 8. cxd5 Nb4 9. h3 Nxd3 10. Qxd3 Bxf3 11. gxf3 Nxd5 12. e4 Nxc3 13. bxc3 Qd7 14. Kh2 c5 15. d5 c4 16. Qe3 b5 17. Ba3 a5 18. Rab1 Rab8 19. f4 Rfc8 20. Rfd1 Rb7 21. e5 Qf5 22. d6 Bh6 23. Kg3 exd6 24. Bxd6 g5 25. fxg5 Bxg5 26. Qf3 Bh4+ 27. Kg2 Qxf3+ 28. Kxf3 Be7 29. Rd5 Bxd6 30. exd6 b4 31. Rxa5 Rd8 32. Rxb4 Rxb4 33. cxb4 Rxd6 34. Rc5 Rd3+ 35. Ke4 Ra3 36. Rxc4 Rxa2 37. f4 Kg7 38. Rc8 Kf6 39. Rb8 Rh2 40. Rb6+ Ke7 41. Rh6 Rb2 42. Rb6 Rh2 43. b5 Rxh3 44. Rb7+ Kf6 45. b6 Rb3

[Assistant] Rb8


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. Nf3 c6 2. g3 d5 3. Bg2 Nf6 4. O-O Nbd7 5. c4 e6 6. b3 Be7 7. Bb2 O-O 8. e3 dxc4 9. bxc4 Qb6 10. Qb3 Rd8 11. d4 c5 12. Nc3 cxd4 13. exd4 Nf8 14. Rfd1 Ng6 15. c5 Qc7 16. Nb5 Qb8 17. Rab1 a6 18. Nc3 Bd7 19. Na4 Bc6 20. Nb6 Ra7 21. Bc3 Nd5

[Assistant] Ba5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 5r1k/1q3P2/p5Qp/1p1pr3/3P4/P1P4P/8/2R3K1 w - - 0 35

[Assistant] Qxh6#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. c4 Nf6 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. e3 O-O 6. Nge2 e5 7. O-O Nc6 8. d3 h6 9. h3 Ne8 10. Rb1 f5 11. b4 Nf6 12. b5 Ne7 13. Nd5 Nexd5 14. cxd5 g5 15. f4 gxf4 16. exf4 e4 17. dxe4 Nxe4 18. Bb2 Bxb2 19. Rxb2 Qf6 20. Rc2

[Assistant] Rf7


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rn3r1k/pp4pp/4Q3/3p4/8/2NB4/PPP4q/1K1R4 w - - 0 21

[Assistant] Qxd5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c6 2. Nf3 d5 3. h3 Nf6 4. c4 Bf5 5. Nc3 e6 6. Bg5 Be7 7. e3 Nbd7 8. Bd3 Bg6 9. O-O Rc8 10. Bxg6 hxg6 11. c5 Nh5 12. b4 Bxg5 13. Nxg5 Qxg5 14. a4 Nhf6 15. b5 Ne4 16. Nxe4 dxe4 17. a5 cxb5 18. a6 b6 19. cxb6 Nxb6

[Assistant] Qb3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: r4rk1/p2b1ppp/2n1p3/7R/2Bq4/1P1Q4/3B1PPP/5RK1 w - - 0 21

[Assistant] Qxh7#


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1Q6/8/5p2/1K4p1/2P3P1/3n1Pk1/8/3B3q b - - 1 47

[Assistant] Kg2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/1p5p/4k3/1Kn5/8/8/P6P/8 w - - 0 35

[Assistant] Kxc5


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 1nk2r2/1bp1q3/p3p1p1/1pPpP2p/3P1N2/nPR3P1/4QP2/R5K1 w - - 0 28

[Assistant] Nxg6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4

[Assistant] Nf6


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3q2k1/p1p2pp1/6rp/4P3/2N2n2/5QP1/P1P2P1P/R5K1 b - - 0 23

[Assistant] Qd4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 3rr1k1/pp4pp/6q1/7N/4ppn1/PPR5/1B1PQP2/5K1R b - - 1 25

[Assistant] f3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: 8/1p1knp2/p3pQ1q/3pP1P1/5K2/1B3P2/3Q4/6r1 b - - 0 39

[Assistant] Qh4+


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 exd5 5. d4 c4 6. g3 Nc6 7. Bg2 Bd6 8. O-O Nge7 9. Re1 O-O 10. Nbd2 Bf5 11. Nf1 Bg6 12. Nh4 Bd3 13. Ne3 Bc7 14. b4 a6 15. a4 Qd7 16. f4 Rae8 17. Nf3 Nf5 18. Ne5 Nxe3 19. Bxe3 Bxe5 20. fxe5 f6 21. b5 Na5 22. exf6 Rxf6 23. bxa6 Rxa6 24. Bf4 Rxe1+ 25. Qxe1 Nb3

[Assistant] Ra2


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: b5k1/p2p2p1/1p2p1rp/5p2/1P1q4/P2BR1RQ/2P3PP/6K1 b - - 9 23

[Assistant] Rxg3


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. d4 c5 2. e3 cxd4 3. Nf3 d5 4. exd4 Nf6 5. Be2 Nc6 6. Be3 Bg4 7. c3 Bxf3 8. Bxf3 e6 9. O-O Bd6 10. Re1 Qc7 11. b3 O-O 12. Nd2 Rfe8 13. c4 dxc4 14. bxc4 b6 15. c5 bxc5 16. dxc5 Be7 17. h3 Rad8 18. Qe2 Nd5 19. Nc4 Nxe3 20. Qxe3 Bf6 21. Nd2 Rd7 22. Ne4 Bxa1 23. Rxa1 Red8 24. Rf1 Qe5 25. Qg5 Qf5 26. Qg3 Ne5 27. Be2 g6 28. Bg4

[Assistant] Qxe4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] 1. b3 c6 2. Bb2 d5 3. f4 Bf5 4. Nf3 e6 5. e3 Nd7 6. Be2 Ngf6 7. O-O Be7 8. Ne5 O-O 9. c4 Nxe5 10. fxe5 Nd7 11. d3 Bg6 12. Nd2 Qc7 13. Nf3 Bh5 14. d4 f6 15. exf6 Bxf6 16. Bd3 Rae8 17. Qc2 g6 18. e4 dxe4 19. Bxe4 Bg7 20. Rae1 Nf6 21. Bd3 Bxf3 22. Rxf3 Qd6 23. Rfe3

[Assistant] Ng4


[System] You are a chess grandmaster. Given a chess position (as a PGN move sequence or a FEN), play the best move in standard algebraic notation (SAN).

[User] FEN: rn1q1bnr/pbp1k1pp/1p1pp3/4Np1Q/3P4/3BP3/PPP2PPP/RNB1K2R w KQ - 2 7

[Assistant] Qf7#