[System] You are a 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. c4 Nf6 3. cxd5 c6 4. dxc6 Nxc6 5. Nf3 e5 6. Nc3 Bc5 7. Bb5 O-O 8. Bxc6 bxc6 9. Nxe5 Re8 10. d4 Bd6 11. Nf3 Bg4

[Assistant] h3


[System] You are a 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. c4 Nf6 4. cxd5 exd5 5. Nf3 Be7 6. O-O O-O 7. a3 b6 8. b4 Bb7 9. Bb2 Nbd7 10. d4 a5 11. bxa5 Rxa5 12. Qc2 c5 13. dxc5 Nxc5 14. Nc3 Nce4 15. Rfd1 Rc5 16. Qb3 Qc7 17. Nb5 Qc6 18. a4 Ba6 19. Nfd4 Qc8 20. Rac1 h6 21. Rxc5 bxc5 22. Nf3 c4 23. Qc2 Bc5 24. Nfd4 Re8 25. f3 Nd6

[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. c4 g6 2. g3 Bg7 3. Bg2 d6 4. Nc3 c6 5. d3 Nf6 6. e4 O-O 7. Nge2 Nbd7

[Assistant] 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] FEN: r3r1k1/p4pp1/2b4p/2p5/2Pq4/P2P2P1/1Q3PP1/1R2RBK1 b - - 3 22

[Assistant] Rxe1


[System] You are a 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. c3 c5 2. d4 cxd4 3. cxd4 g6 4. Nc3 Bg7 5. Nf3 d5 6. g3 Nf6 7. Bg2 O-O 8. O-O Nc6 9. Be3 Ne4 10. Re1 Qa5 11. Bd2 Nxd2 12. Qxd2 e6 13. a3 b5 14. b4 Qb6 15. Qd3 a5 16. Qxb5 Qxb5 17. Nxb5 axb4 18. axb4 Ba6 19. Nc7 Nxb4 20. Reb1 Rab8 21. e3 Bd3 22. Rb3 Bc4 23. Rb2 Bf6 24. Rab1 Bd3 25. Rc1 Be4 26. Ne5 Bxe5 27. dxe5 Nd3 28. Rxb8 Rxb8 29. Rd1 Bxg2 30. Kxg2 Nxe5 31. f4 Kg7 32. fxe5 Rb2+ 33. Kf3 Rc2 34. Ne8+ Kh6 35. Nf6 g5 36. h4 g4+ 37. Kxg4 Kg6 38. Rb1 h5+

[Assistant] Nxh5


[System] You are a 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 e5 4. d3 d6 5. Be2 Nf6 6. O-O Be7 7. Be3 O-O 8. Qd2 Be6 9. Nb1 b6 10. c3 d5 11. Qc2 d4 12. cxd4 cxd4 13. Bg5 Rc8 14. Bxf6 Nb4 15. Qd2 Bxf6 16. Qxb4 Be7 17. Qd2 a5 18. Na3 b5 19. Rac1 b4 20. Rfe1 bxa3 21. bxa3 Bxa3 22. Rxc8 Qxc8 23. Rb1 Bb4 24. Qd1 Qc3 25. Rc1 Qb2 26. Nxe5 Bxa2 27. Nc4 Bxc4 28. dxc4 a4 29. c5 a3 30. c6 a2 31. c7 Bc3 32. Bc4 a1=Q 33. Rxa1 Qxa1 34. Qxa1 Bxa1

[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: 2r3k1/3R1pp1/4p2p/8/1pPBP3/1B5q/1KQ2Pn1/8 b - - 0 32

[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. d4 c6 2. c3 d5 3. e3 Nf6 4. Nf3 Bf5 5. Bd3 Bg6 6. Qc2 Bh5 7. Nbd2 Bg6 8. e4 e6 9. e5 Nfd7 10. O-O c5 11. Re1 c4 12. Bxg6 hxg6 13. Nf1 Be7 14. Ng3 Nc6

[Assistant] b3


[System] You are a 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 e6 3. c4 exd5 4. cxd5 d6 5. Nc3 Nf6 6. e4 Be7 7. a4 O-O 8. Nf3 Nbd7 9. Be2 Ne5 10. O-O Bg4 11. Nxe5 Bxe2 12. Qxe2 dxe5 13. Bg5 h6 14. Bxf6 Bxf6 15. Rad1 Re8 16. d6 Rc8 17. Nd5 Qd7 18. Nxf6+ gxf6 19. Qh5 Kg7 20. h4 Rg8 21. f4 Kh7 22. fxe5 fxe5 23. Rxf7+ Rg7 24. Rxd7 Rxd7 25. Qf5+ Kh8 26. Qxd7 Rg8 27. Qe7 Rg7 28. Qf8+ Kh7 29. Qf6 Rg6 30. d7 Rg7 31. d8=Q h5

[Assistant] Rd7


[System] You are a 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. c4 Nf6 5. Nc3 Nc6 6. Bf4 e6 7. c5 Be7 8. Bb5 O-O 9. Nf3 Qa5 10. O-O Bd7 11. a3 a6 12. b4 Qd8 13. Bxc6 Bxc6 14. Ne5 Re8 15. Re1 Nd7 16. Nxc6 bxc6 17. Rb1 Bf6 18. Qd2 g6 19. a4 e5 20. Be3 exd4 21. Bxd4 Rxe1+ 22. Rxe1 Rb8 23. Rb1 Kg7 24. h3 Ne5 25. Ne2 Nc4 26. Qc3 Bxd4 27. Qxd4+

[Assistant] Qf6


[System] You are a 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 c5 3. d5 e5 4. Nc3 d6 5. g3 Be7 6. Bg2 O-O 7. e4 Ne8 8. h3 Nd7 9. Nge2 a6 10. O-O Rb8 11. f4

[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] FEN: r4rk1/pp1n2p1/3Q3p/2p1p2b/4P2q/1P6/PBP2N2/R3KB1R b KQ - 0 19

[Assistant] Qxf2#


[System] You are a 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 g6 3. g3 Bg7 4. Bg2 O-O 5. e3 c5 6. Nge2 Nc6 7. O-O d6 8. d4 cxd4 9. exd4 Rb8 10. d5 Ne5 11. b3 a6 12. Nd4 Bg4 13. Qd2 Bd7 14. f4 Neg4 15. h3 Nh6 16. g4 Ne8 17. f5 b5 18. cxb5 axb5 19. Bb2 Qb6 20. Rad1 gxf5 21. g5 Ng4 22. hxg4 fxg4

[Assistant] Kh1


[System] You are a 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 d6 3. Bg2 g6 4. Nc3 Bg7 5. e4 O-O 6. Nge2 c5 7. O-O Nc6 8. d3 Rb8 9. h3 a6 10. a4 Nd7 11. Be3 Nd4 12. Rb1 a5 13. Nb5 Nxb5 14. axb5 e5 15. f4 f5 16. Nc3 Nb6 17. exf5 Bxf5 18. g4 Be6 19. Be4 Bh6 20. Qd2 Qh4 21. Bg2 Qg3 22. Rbe1 Rbe8 23. fxe5 Bxe3+

[Assistant] Qxe3


[System] You are a 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 c5 3. Bxf6 gxf6 4. d5 Qb6 5. Qc1 f5 6. c4 Bg7 7. Nc3 O-O 8. e3 Qh6 9. Bd3 d6 10. Nge2 e6 11. Nf4 a6 12. a4 Nd7 13. Qc2 Ne5 14. Be2 Ng6 15. g3 Nxf4 16. gxf4 Kh8 17. O-O-O e5 18. fxe5 Bxe5 19. f4 Bf6 20. Bd3 Qh3 21. Rde1 Bd7 22. Rhg1 Rg8 23. Qf2 Bxc3 24. bxc3 Bxa4 25. Rg5 Bd7 26. Reg1 Rg6 27. R1g3 Qh6 28. Bxf5 Bxf5 29. Rxf5 Qg7 30. Kc2 b5 31. Rfg5 bxc4 32. Rxg6 hxg6 33. Qe2 a5 34. Qxc4 a4 35. Rg1 a3 36. Ra1 Qh6 37. Kb3 Qxh2 38. Rxa3 Rxa3+ 39. Kxa3 Qd2 40. f5 gxf5 41. Qh4+ Kg8 42. Qg5+ Kf8 43. Qd8+ Kg7 44. Qg5+

[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] 1. Nc3 d5 2. Nf3 d4 3. Ne4 Nc6 4. Ng3 f6 5. d3 e5 6. e4 h5 7. c3 h4 8. Ne2 g5 9. h3 Bc5 10. cxd4 Nxd4 11. Nexd4 Bxd4 12. Nxd4 Qxd4 13. Qb3 b6 14. Be3 Qd6 15. Rc1 Be6 16. Qc2 c5 17. Be2 Ne7 18. O-O Ng6 19. b4 Nf4 20. bxc5 bxc5 21. Bxc5 Qd7 22. Be3 Kf7 23. Bxf4 gxf4 24. Bf3 Rhg8 25. Kh1 Bxh3 26. Rg1 Be6 27. Qc7 Rad8 28. Qxd7+ Rxd7

[Assistant] Rc6


[System] You are a 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 Be7 3. Nc3 c6 4. Nf3 d5 5. Bd3 dxe4 6. Nxe4 Nf6 7. Qe2 b6 8. c3 a5 9. O-O Bb7 10. Rd1 Nxe4

[Assistant] Bxe4


[System] You are a 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. Nc3 c5 4. d5 d6 5. Bb5+ Bd7 6. a4 e5 7. dxe6 fxe6 8. Qxd6 Bxb5 9. Qxd8+ Kxd8 10. Nxb5 a6 11. Nd6 Kc7 12. Nf7 Ne7 13. Nxh8 Bxh8 14. Nf3 Nbc6

[Assistant] c3


[System] You are a 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. Nc3 Nf6 3. Bg5 d5 4. Bxf6 exf6 5. e3 Be6 6. Qf3 Qd7 7. Bd3 g5 8. Nge2 h5 9. h4 g4 10. Qg3 Nc6 11. Nf4 Nb4 12. Nxe6 Qxe6 13. Qxc7 Bd6 14. Qxb7 O-O 15. Qb5 Rab8 16. Qa4 Nxd3+ 17. cxd3 f4 18. e4 dxe4 19. dxe4 Rxb2 20. O-O f5 21. e5 Be7 22. Rfe1 Bxh4 23. d5 Bxf2+ 24. Kf1 Qe7 25. d6 Qh4 26. Qc4+ Kh8

[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] 1. d4 e6 2. c4 Be7 3. Nc3 d5 4. Nf3 dxc4 5. e3 Nf6 6. Bxc4 O-O 7. O-O b6 8. Qe2 Bb7 9. e4 Nbd7 10. Rd1 c5 11. d5 exd5 12. exd5 Bd6 13. Bg5 a6 14. Ne4 Re8 15. Nxd6 Rxe2 16. Bxe2 Qc7 17. Nxb7 Qxb7 18. a4 h6 19. Rac1 hxg5 20. Nxg5 g6

[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 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Bb5+ c6 6. Ba4 Nxe4 7. O-O Be7 8. Qf3 Nc5 9. Bb3 Nxb3 10. axb3 O-O 11. Nc3 Bf6 12. Be3 Nd7 13. Rfd1 Ne5 14. Qg3 Be6 15. Nxe6

[Assistant] fxe6


[System] You are a 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: 8/5rkp/p5p1/2Q5/5PP1/4p1KP/1q6/4B3 w - - 1 42

[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. c4 e6 2. g3 d5 3. Nf3 Nf6 4. Bg2 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Rd1 Ra7 11. Nc3 b4 12. Na4 Be4 13. Qd2 Nc6 14. Nc5 Bxf3 15. Bxf3 Nxd4 16. Qxd4 Qxd4 17. Rxd4 Bxc5 18. Rc4 Bb6 19. Be3 a5 20. Rac1 g6 21. Rc6 Nd7 22. Bxb6 cxb6 23. Rd6 Rb8 24. Rcc6 Ne5 25. Rxb6 Rxb6 26. Rxb6 Nxf3+ 27. exf3 Rc7 28. Rb5 Rc2 29. Kg2 Rxb2 30. Rxa5 Rc2 31. Ra4 Rb2 32. a3 Kg7 33. Rxb4 Ra2

[Assistant] Rb3


[System] You are a 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 d5 3. c3 cxd4 4. cxd4 dxe4 5. Nc3 Nf6 6. f3 exf3 7. Nxf3 g6 8. Bb5+ Bd7 9. O-O Bg7 10. Bxd7+ Nbxd7 11. Re1 O-O 12. Bg5 e6 13. Qd2 Re8 14. Bh6 Qb6 15. Bxg7 Kxg7 16. Rad1 Rad8 17. b3 e5 18. Kh1 exd4 19. Rxe8 Rxe8 20. Ne2 Ne4 21. Qxd4+ Qxd4 22. Nexd4 Nf2+ 23. Kg1 Nxd1 24. h3 Ne3 25. Kf2

[Assistant] Nf5


[System] You are a 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 f5 2. Bg2 Nf6 3. c4 g6 4. Nc3 Bg7 5. d3 O-O 6. Nf3 d6 7. O-O e5 8. Rb1 c6 9. b4 h6 10. Qc2 g5 11. a4 f4 12. b5 Qc7 13. Ba3 Ne8 14. Nd2 Bf5 15. Nde4 Nd7 16. bxc6 bxc6 17. c5 d5 18. Nd6 Nxd6 19. cxd6 Qa5 20. Bb4 Qa6 21. e4

[Assistant] fxe3


[System] You are a 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: r1br2k1/2qN1p1p/1pPnn1p1/4N3/1p6/5Q2/5PPP/2R1R1K1 w - - 2 28

[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 e5 2. Nf3 Nc6 3. Bb5 d6 4. c3 Bd7 5. O-O Nf6 6. Re1 Be7 7. d4 O-O 8. d5 Nb8 9. Bxd7 Nbxd7 10. h3 h6 11. c4 Nh7 12. Nc3 Ng5 13. Bxg5 Bxg5 14. Nxg5 Qxg5 15. Qg4 Qxg4 16. hxg4 g6 17. f3 a6 18. Kf2 f5 19. gxf5 gxf5 20. Rh1 Kg7 21. Rh4 Nc5 22. Ke3 f4+ 23. Ke2 Rf6 24. Rg4+ Kf7 25. Rh1 Rg8 26. Rhh4 Rfg6 27. Rxg6 Rxg6 28. Kf1 Nd3 29. b3 Nb4 30. Rh5 Nc2 31. Nd1 b6 32. Kf2 Nb4 33. Nc3 Nd3+ 34. Kf1 Nc5 35. Rf5+ Kg7 36. Rh5 Nd7 37. b4 Nf6 38. Rh4 Nh7 39. c5 Nf6 40. cxd6 cxd6 41. Kf2 Kh7 42. Rh1 Rg8 43. Rc1 Rc8 44. Ne2 Rxc1 45. Nxc1 Ne8 46. Nd3 Nc7 47. a4 b5 48. axb5 axb5 49. Ke2 Na6 50. Kd2 Kg6 51. Ke2 Kh5 52. Kf2 Kg5 53. Kg1 h5 54. Kf1 Kf6 55. Kf2 Kg6 56. Kf1 Kg5 57. Ke2 h4 58. Kf2 Kh5

[Assistant] Kg1


[System] You are a 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. g3 Nc6 3. Bg2 g6 4. O-O Bg7 5. c4 Nf6 6. Nc3 O-O 7. d3 d6 8. Rb1 Bd7 9. a3 b6 10. b4 Rb8 11. bxc5 dxc5 12. a4 Nb4 13. Bd2 Bc6 14. Nb5 a5 15. Bc3 Qd7 16. Qd2 Qb7 17. Qb2 Nh5 18. Bxg7 Nxg7 19. e3 Rfd8 20. Qe2 e6 21. Rfd1 Nf5 22. d4 Be4 23. Rbc1 Nd6 24. dxc5 bxc5 25. Nxd6 Rxd6 26. Rxd6 Rc8 27. Ne1 Bxg2 28. Nxg2 Qc7 29. Rcd1 Qe7 30. Rd7 Qf6 31. Nf4 Rf8 32. Qd3 Nxd3 33. R1xd3 g5 34. Kg2 gxf4 35. exf4 Kh8 36. Rb7 Rd8 37. Rdd7 Rxd7 38. Rxd7 Kg7 39. Rd2 Qc3 40. h4 Qxd2 41. h5 Qd4 42. h6+ Kxh6 43. f3 Kg7 44. g4 Qxc4 45. Kg3 Qe2 46. f5 c4 47. Kf4 exf5 48. Kg5 f6+ 49. Kxf5 Qxf3+ 50. Ke6 Qxg4+ 51. Kd5

[Assistant] c3


[System] You are a 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: r1kn4/pp5p/4b1rq/8/2N5/8/P4PPP/2RR2K1 w - - 0 25

[Assistant] Nb6+


[System] You are a 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: 4n3/8/3N4/2P1K3/p5kp/P7/8/8 w - - 0 57

[Assistant] Nxe8


[System] You are a 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/pb3ppp/8/8/2q5/5P2/PPPQNKnP/R5R1 b - - 1 22

[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. c4 f5 2. g3 g6 3. Bg2 Nf6 4. Nc3 Bg7 5. d3 O-O 6. e4 d6 7. Nge2 c6 8. O-O a5 9. h3 fxe4 10. dxe4 Be6 11. b3 Qc8 12. Kh2 Nbd7 13. f4 Nc5 14. Be3 Nfxe4 15. Nxe4 Nxe4

[Assistant] Bxe4


[System] You are a 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. Nb1 e5 4. d3 Nf6 5. g3 Bd6 6. Bg2 O-O 7. Ne2 c5 8. h3 Nc6 9. O-O Nd7 10. Kh2 f5 11. f4 fxe4 12. dxe4 exf4 13. Nxf4 Nde5 14. Nd2 b5 15. a4

[Assistant] bxa4


[System] You are a 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/bpp1P1pp/n7/1pPP4/6n1/2B3Pq/P4P1P/RN3RK1 w - - 0 29

[Assistant] exf8=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 c5 2. g3 Nf6 3. Bg2 e6 4. f4 d5 5. e5 Nfd7 6. Nf3 Nc6 7. O-O Be7 8. c3 f6 9. d4 fxe5 10. Nxe5 O-O 11. Be3 Ndxe5 12. dxe5 Bd7 13. Nd2 b5 14. Nf3 Rb8

[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: 4r1k1/1Q4pp/p4np1/3p2N1/P2n1qP1/2N4P/1P3P2/R5K1 w - - 1 26

[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: 2b3k1/4N3/1n2r2p/1p1BP3/r5pP/bNP5/6P1/1K1R1R2 b - - 6 32

[Assistant] Bxe7


[System] You are a 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: 2rr1nk1/R4ppp/4p3/p2n4/3P4/q3PQ1P/5PP1/1B1R2K1 w - - 4 27

[Assistant] Qxf7+


[System] You are a 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: 8/1p6/p1p2kp1/P7/1PP2K2/6P1/8/8 w - - 0 40

[Assistant] Kg4


[System] You are a 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. d4 Qd8 4. Nf3 e6 5. c4 Nf6 6. Nc3 Be7 7. Be2 O-O 8. O-O c5 9. Be3 cxd4 10. Bxd4 Nc6 11. Bxf6 Bxf6 12. Qc2 a6 13. Rad1 Qc7 14. Ne4 Nb4 15. Qb3 Be7 16. Nf6+ gxf6 17. Nd4 Nc6

[Assistant] Nxc6


[System] You are a 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. c3 Nc6 5. Nf3 Bd7 6. a3 f6 7. Bd3 fxe5 8. dxe5 Qc7 9. Qe2 c4 10. Bc2 Nge7 11. O-O h6 12. Re1 g5 13. h3 Bg7 14. Nbd2 Nxe5 15. Nxe5 Bxe5 16. Qxe5 Qxe5 17. Rxe5 Kf7 18. Nf3 Ng6 19. Bxg6+ Kxg6 20. Be3 Rhf8 21. Bd4 Rf5 22. Rae1 b6 23. Rxf5 Kxf5

[Assistant] g4+


[System] You are a 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 c5 4. d5 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 9. Bd3 Bg4 10. O-O Re8 11. h3 Bxf3 12. Qxf3 Nbd7 13. Bd2 a6 14. a4 Rb8 15. Rae1 Qc7 16. Qg3 c4 17. Bc2 b5 18. axb5 axb5 19. e5 Nh5 20. Qh2 b4 21. Ne4 dxe5 22. d6 Qa7+ 23. Be3 Qa2

[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. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. Bxc6 dxc6

[Assistant] 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. d4 d5 2. Nf3 Nf6 3. g3 c6 4. Bg2 Bg4 5. Nbd2 Nbd7 6. O-O e6 7. Re1 Bd6 8. e4 dxe4 9. Nxe4 Nxe4 10. Rxe4 Bf5 11. Re1 O-O 12. c3 Nf6 13. Qb3 Qb6 14. Nd2 Qxb3 15. axb3 a6 16. Nc4 Bc7 17. Bg5 Nd5 18. b4 h6 19. Bd2 Rad8 20. h4 Rd7 21. Bf3 Rfd8 22. Kg2 Nxb4 23. cxb4 Rxd4 24. b3 Rxd2 25. Nxd2 Rxd2 26. Re2 Rd8 27. Raa2 e5 28. Rad2 Bd3 29. Re3 Bf1+ 30. Kxf1 Rxd2 31. Re2 Rxe2 32. Kxe2 Bd6 33. b5 axb5 34. Be4 Kf8 35. h5 Ke7 36. g4 Kf6 37. f3 Bc5 38. Bd3 g6 39. hxg6 fxg6 40. Be4 h5 41. gxh5 gxh5 42. Kf1 Kg5 43. Kg2 h4 44. Kh3 Bd4 45. Bd3 b6 46. Be4 c5 47. Bc6 b4 48. Bd5 Bf2 49. Kg2 Bg3

[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. e4 d5 2. exd5 Nf6 3. Bb5+ Bd7 4. Be2 c6 5. d4 cxd5 6. c4 Nc6 7. cxd5 Nxd5 8. Nc3 Nxc3 9. bxc3 e5 10. d5 Ne7 11. c4 Ng6 12. Nf3 Bc5

[Assistant] 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. d3 d5 2. e4 dxe4 3. dxe4 Qxd1+ 4. Kxd1 Nc6 5. c3 Bg4+ 6. Kc2 Bd7 7. f4 O-O-O 8. Nf3 f5 9. Bc4 fxe4 10. Ne5 Nxe5 11. fxe5 Bf5 12. Be3 Nh6 13. h3 e6 14. Nd2 Bg6 15. g4 Be7 16. Raf1 Rhf8 17. Bxe6+ Kb8 18. g5 Ng8 19. Bxg8 Rxg8 20. Rf4 Bxg5 21. Rxe4 Bxe3 22. Nc4 Bxe4+ 23. Kb3 Bxh1 24. a4 Bd5 25. a5 Bxc4+ 26. Kxc4 Rge8 27. b4 b6 28. e6 Rxe6 29. axb6 Rc6+ 30. Kb3 Rxb6 31. h4 c5 32. h5 cxb4 33. h6 bxc3+ 34. Kxc3 gxh6 35. Kc4 Rc6+ 36. Kb4 Kc7 37. Kb3 Rb8+ 38. Ka4 Rbb6 39. Ka5

[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. Nf3 d6 2. g3 g6 3. Bg2 Bg7 4. O-O Nf6 5. d3 O-O 6. Nbd2 c5 7. Re1 Nc6 8. a4 e5 9. e4 d5 10. h3 dxe4 11. dxe4 Re8 12. c3 Qe7 13. Qc2 b6 14. b3 Ba6 15. Bf1 Bxf1 16. Nxf1 Rad8 17. Bg5

[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: 1rr2k2/5ppQ/p3bq2/8/5P2/2PB4/PP4PP/2KR3R b - - 0 19

[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: r4r1k/1pp1qpp1/8/p2PB1PN/8/2b2NQP/nPP5/1K1R3R b - - 2 22

[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] FEN: 8/P5R1/5K2/r7/6k1/6p1/8/8 b - - 2 60

[Assistant] Kf3


[System] You are a 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. dxc5 e6 5. Be3 Nh6 6. Bxh6 gxh6 7. c4 Bxc5 8. cxd5 exd5 9. Bd3 Qb6 10. Qe2 Nc6 11. Nf3 Bg4 12. O-O Nd4 13. Qd1 Bxf3 14. gxf3 Qxb2 15. Nd2 Qxd2

[Assistant] Qa4+


[System] You are a 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 Bf5 5. Ng5 Nf6

[Assistant] Nxf7


[System] You are a 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 Nc6 2. e3 e5 3. d5 Nce7 4. c4 Ng6 5. Nc3

[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. Nc3 Nc6 3. Bc4 g6 4. d3 Bg7 5. f4 a6 6. a4 e6 7. Nf3 Nge7 8. O-O d5 9. Ba2 O-O 10. Qe1 dxe4 11. dxe4 Nd4 12. Qf2 b5 13. f5 exf5

[Assistant] Nxd4


[System] You are a 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. c4 Nf6 3. e4 h6 4. e5 Ng8 5. d4 d5 6. exd6 exd6 7. Bd3 Nf6 8. O-O Be7 9. Re1 O-O 10. Nc3

[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 Nc6 2. Nc3 e6 3. Nf3 Nf6 4. d5 exd5

[Assistant] Nxd5


[System] You are a 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: 2r3k1/pbp2pp1/1p4np/3N1R2/2P1rNq1/P1Q5/1P4PP/2R3K1 w - - 0 24

[Assistant] Nh5


[System] You are a 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/p7/1p1p1p1k/1P1Pp3/P3P1K1/8/8/8 w - - 1 41

[Assistant] Kf5


[System] You are a 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: 8/8/3k3p/pp3p2/3K1P1P/1PP5/8/8 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] 1. d4 Nf6 2. Nf3 d5 3. Bg5 e6 4. Bxf6 Qxf6 5. e3 Bd6 6. c4 O-O 7. cxd5 exd5 8. Nc3 c5 9. Nxd5 Qd8

[Assistant] dxc5


[System] You are a 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 g6 3. Bc4 Bg7 4. d3 e6 5. f4 Ne7 6. Nf3 d5 7. Bb3 O-O 8. O-O Nbc6 9. Qe1 Nd4 10. Nxd4 cxd4 11. Ne2 Nc6 12. Ng3 dxe4 13. dxe4 Kh8

[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. Nf3 c5 2. g3 e6 3. Bg2 Nf6 4. O-O a6 5. c4 Nc6 6. Nc3 h5 7. e4

[Assistant] b6


[System] You are a 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: 2R5/8/3r4/5P2/8/2p2K2/3k4/8 b - - 0 71

[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. d3 Nf6 2. Nd2

[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. g3 d5 2. Bg2 c6 3. b3 Bf5 4. Bb2 e6 5. d3 h6 6. Nd2 Nf6 7. e4 Bg6

[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: 5rk1/1p6/p2BR1pp/2pP1nq1/P1P5/8/2Q3PP/7K b - - 0 27

[Assistant] Ng3+


[System] You are a 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 c5 3. Bc4 Nc6

[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 d5 2. Nc3 d4 3. Nce2 c5 4. Ng3 Nc6 5. Bc4 b6 6. d3 e6 7. N1e2 Bb7 8. O-O Qc7 9. f4 Bd6 10. f5 Be7 11. fxe6 f6 12. Nf5 O-O-O 13. Nxe7+ Ngxe7 14. Nf4 Rde8 15. Nd5 Nxd5 16. exd5 Ne7 17. Qf3 Qd8 18. Bf4 Nxd5 19. Bxd5 Bxd5

[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 g6 2. e3 Bg7 3. f4 f6 4. Nf3 Nh6 5. c3 Nf7 6. Bd3 O-O 7. Nbd2 e6 8. Qc2 f5 9. O-O d6 10. Ne5 c5 11. Nef3 cxd4 12. exd4 Nc6 13. Nb3 Ne7 14. Bd2 Nd5 15. Rae1 a5 16. Bc4 a4 17. Bxd5 axb3

[Assistant] Bxb3


[System] You are a 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. c3 cxd4 3. cxd4 d5 4. Nf3 Nc6 5. Nc3 Nf6

[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] 1. d3 g6 2. Nf3 Nf6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. e4 Nbd7 7. Nc3 e5 8. Bg5 Re8 9. Qd2 c6

[Assistant] Bh6


[System] You are a 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 e5 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Nf3 Bd6 7. Bc4 Be6 8. Bxe6 fxe6 9. Bg5 Ke7 10. O-O-O a6 11. h3 h6 12. Bh4 Nc6 13. Rhe1 b5 14. a3 Rhb8 15. Bg3 a5 16. Nd5+ exd5 17. exd5 Nd8 18. Bxe5 Bxe5 19. Nxe5 Kf8 20. f4 Nf7 21. Ng6+ Kg8 22. Re7 Rc8 23. g4 Ra6 24. f5 Rd6 25. Re6 Rcd8 26. Nf4 Ng5 27. h4 Nxe6 28. fxe6 Nxd5 29. Rxd5 Rxd5 30. b3 Rd4 31. e7 Rd1+ 32. Kb2 Re8 33. Ng6 Rd6 34. h5 Rxg6 35. hxg6 Rxe7 36. Kc3 Re2 37. Kd3 Rg2 38. Kd4 Rxc2 39. Kd5 a4 40. b4 Kf8 41. Ke6 c5 42. bxc5 Rxc5 43. Kd6 Rg5 44. Kc6 b4 45. axb4 a3 46. b5 Rxb5 47. Kxb5

[Assistant] a2


[System] You are a 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. Nf3 Bg4 4. Be2 Nf6 5. d4 e6 6. c4 Qd8 7. Qb3 b6 8. h3 Bxf3 9. Bxf3 c6 10. Nc3 Qxd4 11. Nb5 cxb5 12. Bxa8 bxc4 13. Qa4+ Nbd7 14. O-O Bd6 15. Bc6 Ke7 16. Be3 Qe5 17. g3

[Assistant] Qf5


[System] You are a 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 Be7 6. Bd3 Ngf6 7. Qe2 Nxe4 8. Bxe4 c6 9. Bd3 Nf6 10. c3 h6

[Assistant] 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. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. c4 dxc4 5. O-O Nbd7 6. Na3 Nb6 7. Qc2 Qd5

[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 e6 2. Nc3 d5 3. Nf3 Nf6 4. e5 Nfd7 5. d4 Be7 6. Bd3 a6 7. O-O c5 8. dxc5 Nc6 9. Re1 Nxc5 10. Bf4 Nxd3

[Assistant] Qxd3


[System] You are a 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: 8/4R3/2p2P1p/3p4/7P/5k2/p2K4/r7 w - - 0 42

[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] FEN: 3r2k1/5p1p/p2n2p1/1p6/6B1/P1r3P1/2q1QP1P/3RR1K1 w - - 0 29

[Assistant] Qe7


[System] You are a 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. g3 Bg7 4. Bg2 O-O 5. Nc3 c6 6. Nf3 d6 7. O-O a6 8. h3 b5 9. b3 Be6 10. Qd3 Nbd7 11. Bb2

[Assistant] bxc4


[System] You are a 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. Nc3 e5 4. e4 a6 5. f4 exf4 6. Bxf4 Be7 7. Nf3 b5 8. e5 b4 9. exd6 Bxd6 10. Qe2+

[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] 1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. e3 Nc6 5. c3 Bg4 6. Be2 e6 7. h3 Bh5 8. Bh2 Be7 9. O-O

[Assistant] 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] FEN: 1kr3n1/pp1R4/3pB3/3Nq3/1P2PBQ1/6Pp/P4b1P/5R1K b - - 3 21

[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. d4 c6 2. c4 d5 3. Nc3 Nf6 4. Bg5 dxc4 5. e4

[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] 1. e4 d6 2. d4 Nf6 3. Nd2 Bg4 4. c3 Bxd1 5. Kxd1 Nc6 6. Ngf3 e5 7. d5 Ne7 8. Bd3 a6 9. Ke2 Ng6 10. g3 Ng4 11. Re1 Nf6 12. h3 h5 13. Kf1 h4 14. g4 Nf4 15. Bc2 Nxh3 16. g5 Nh5 17. c4 Nxg5 18. Nxg5 Qxg5 19. Nf3 Qg4 20. Bd1 Nf4 21. Bxf4

[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. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng3 h5 6. Nf3 h4 7. Ne2 h3 8. g3 c5 9. dxc5 Qxd1+ 10. Kxd1 Ng4 11. Ke1 Bxc5 12. Ned4 Nc6 13. c3 e5 14. Nxc6 Bxf2+ 15. Ke2 bxc6 16. Nxe5 Ba6+ 17. Kf3 Nxe5+ 18. Kxf2 Bxf1

[Assistant] Rxf1


[System] You are a 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. f3 O-O 6. Bg5 c6 7. Qd2 a6 8. Nge2 b5 9. cxb5 axb5 10. Bh6 b4 11. Nd1 Bxh6 12. Qxh6 Qa5 13. h4 Ba6 14. g4 c5 15. d5 Nbd7 16. h5 Ne5 17. Rh3 Nd3+ 18. Kd2 b3+ 19. Nec3 Nxb2 20. Bxa6 Nxd1 21. Rxd1 Rxa6 22. hxg6 fxg6

[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 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 b5 8. Nd5 Nge7 9. Ne3 g6 10. g3 Bg7 11. Bg2 O-O 12. O-O f5 13. exf5 gxf5 14. Bxc6 Nxc6 15. Qd5+ Kh8 16. Qxc6 Rb8 17. Rd1 f4 18. Rxd6 Qg5 19. Nf1 Bb7 20. Qc7 fxg3 21. hxg3 Qf5 22. Be3 Qe4 23. Qxb7 Rxb7 24. c3 Rbf7 25. Rad1 Qg4 26. Nc2 h5 27. Ne1 h4 28. Ng2 h3 29. Nh4 Bf6 30. Nh2 Qh5 31. N4f3 Be7

[Assistant] Rh6+


[System] You are a 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: 4r1n1/1b5k/p1pR2pp/1q2p3/4P1P1/1Pp5/P6Q/2K4R w - - 4 29

[Assistant] Rd7+


[System] You are a 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/R4Rp1/4p3/4Bn1p/2r5/7P/6P1/6K1 w - - 2 27

[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. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Nf3 e6 6. Bc4 a6 7. O-O b5 8. Bb3 Ra7 9. Qe2 Rd7 10. Rd1 Nf6 11. Bg5 Be7 12. Rac1 O-O 13. h3

[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] 1. d4 Nf6 2. Nf3 c5 3. d5 d6 4. c4 g6 5. Nc3 Bg7 6. e4 O-O 7. Be2 e6 8. Nd2 exd5 9. cxd5 Re8 10. O-O a6 11. a4 Nbd7 12. Nc4 Qc7 13. Bf4 Ne5 14. Bxe5 dxe5 15. a5 Rd8 16. Nb6 Rb8 17. Bc4 Ne8 18. Nca4 Nd6 19. Bd3 Bd7 20. Bc2 Bb5 21. Re1 Nc4 22. b3 Nxb6 23. Nxb6 Bf8 24. Bd3 Bd6 25. Bc4 Qe7 26. Qe2 Bxc4 27. bxc4 Bc7 28. Rab1 Bxb6 29. Rxb6 Rd6 30. Reb1 Rxb6 31. Rxb6 Qc7 32. Qb2 Kf8 33. g3 Ke7

[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] 1. d4 Nf6 2. Nc3 d6 3. e4 c6 4. Nf3 g6 5. Bc4 Bg7 6. e5 O-O 7. exf6 exf6 8. Be3 d5 9. Be2 f5 10. Qd2 Re8 11. O-O-O Nd7 12. h4 Nf6 13. h5 Ne4 14. Nxe4

[Assistant] dxe4


[System] You are a 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 c5 3. e3 cxd4 4. exd4 g6 5. c4 Bg7 6. Nc3 O-O 7. d5 d6 8. Be2 e6 9. O-O exd5 10. Nxd5 Nxd5 11. Qxd5 Be6 12. Qd3 Nd7 13. Ng5 Nc5 14. Nxe6 fxe6 15. Qd1 e5 16. Rb1 Qh4 17. g3 Qh3 18. Bf3 e4 19. Bg2 Qf5 20. Be3 Nd3 21. Qe2 Rf7 22. b3 Raf8 23. Rbd1 Be5 24. Bxe4 Qxe4 25. Qxd3 Qf3 26. Qd5 Qf6 27. f4 Bc3 28. Qxd6 Qxd6 29. Rxd6 Re7 30. Bd4 Bb4 31. Rd5 Re2 32. Rf2 Rfe8 33. Kg2 Be1 34. Rxe2 Rxe2+ 35. Kf1 Rxa2 36. Kxe1 Rxh2 37. Bf2 Rh1+ 38. Ke2 Rb1 39. Rb5 b6 40. c5 bxc5 41. Bxc5 Kf7 42. Bxa7 Ke6 43. Bf2 Kd6 44. b4 Kc6 45. Rb6+ Kc7 46. Bc5 Rb2+ 47. Kf3 Rb3+ 48. Kg4 h5+ 49. Kh4

[Assistant] Rb1


[System] You are a 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/kp3p2/p4p2/3p4/3P1qRn/P1P4Q/5P1P/6K1 b - - 5 30

[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. d4 e5 2. Nf3 e4 3. Nfd2 e3 4. Ne4 d5 5. Ng3 exf2+ 6. Kxf2 h5 7. Ke1 h4 8. e3 Bd6 9. Ne2 h3 10. g3 Bg4 11. Kf2 Nf6 12. Nbc3 Nbd7 13. Qd3 Qe7 14. Nf4 O-O-O 15. Ncxd5 Ne4+ 16. Kg1 Qe8 17. Be2 f5 18. Bxg4 fxg4 19. Nc3 Ndf6 20. Bd2 Bxf4 21. exf4 Rf8 22. Nxe4 Qxe4 23. Re1 Qxd3 24. cxd3 Nd5 25. Kf2 Rfe8 26. Be3 Nxe3 27. Rxe3 Rxe3 28. Kxe3 Re8+ 29. Kd2 Kd7 30. Re1

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bc4 e6 6. Bd2 Bb4 7. a3 Bxc3 8. Bxc3 Qh5 9. Qxh5 Nxh5 10. Nf3 Nf4 11. O-O Nd7 12. Rad1 Nb6 13. Bb3 c6 14. Bd2 Nfd5 15. c4 Nf6 16. Rfe1 O-O 17. Bb4 Rd8 18. a4 Bd7 19. a5 Nc8 20. Bc3 b6 21. a6 Nd6 22. Bb4 Nde8 23. Be7 Rdc8 24. Ba3 c5 25. dxc5 bxc5 26. Ne5 Bc6 27. Nxc6 Rxc6 28. Ba4 Rxa6 29. Bb5 Rb6 30. Bxc5 Rb7 31. Bc6 Rbb8 32. Bxa8 Rxa8 33. Ra1 a5 34. b4 a4 35. Ra3 Nd7 36. Bd4 Nc7 37. Rea1 e5 38. Be3

[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] FEN: 4b3/1pp2k1p/p7/5pQ1/3N1P1P/4nNPK/PP2rP2/2q5 w - - 4 35

[Assistant] Ne5+


[System] You are a 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 e6 3. g3 Nf6 4. Bg2 Be7 5. Nf3 O-O 6. O-O b6 7. d3 Bb7 8. e3 Nbd7 9. Re1 Ne8 10. Nbd2 Bf6 11. Qc1 Bxb2 12. Qxb2 Qf6 13. d4 c5 14. c3 Rc8 15. Rad1 Nd6 16. Rc1 cxd4 17. cxd4 Rfd8 18. Rxc8 Rxc8 19. Rc1 Qd8 20. Rxc8 Qxc8 21. Bf1 Qc7 22. Bd3 Nc8 23. Qc2 Qxc2 24. Bxc2 Nd6 25. Bd3 h6 26. Kf1 Kf8 27. Ke1 Ke7 28. Kd1 Bc6 29. Kc2 Nb5 30. a4 Nc7 31. Kc3 Bb7 32. Kb4 Na6+ 33. Kc3 Nc7 34. b4 a5 35. bxa5 bxa5 36. Ne1 Bc6 37. Kb3 Nb6 38. Ka3 Nxa4 39. Nb3 Nc3 40. Nxa5 Kd6 41. Bc2 N3b5+ 42. Kb4 Bd7 43. Nd3 Na6+ 44. Kb3 Nac7 45. Kb2 Na6 46. Kc1 Na7 47. Kb2 Nc6 48. Nb3 Ncb4 49. Nbc5 Nxd3+ 50. Nxd3 Nc7 51. Ne5 Nb5 52. Nxf7+ Ke7 53. Ne5 Nd6 54. Ng6+ Kf6 55. Nf4 Ne8 56. Nd3 Ke7 57. Nc5 Nf6 58. Bg6 Be8 59. Bxe8 Nxe8 60. Kc3 Nd6

[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: 3r1r1k/1p4p1/2pb2Q1/p3pBPp/P6q/2PPn2P/1P3PK1/R3R3 w - - 0 25

[Assistant] Rxe3


[System] You are a 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. f3 d5 5. a3 Bxc3+ 6. bxc3 O-O 7. cxd5 exd5 8. e3 b6 9. Bd3 Ba6 10. Bc2 Re8 11. Ne2 Nc6 12. O-O

[Assistant] Na5


[System] You are a 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/pp4p1/1qn1R2p/2bQ4/8/2P2Nn1/PP3PPP/RN4K1 w - - 0 16

[Assistant] Rxc6+


[System] You are a 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 d5 2. d4 Nf6 3. Nf3 Bg4 4. h3 Bxf3 5. gxf3 e6 6. e4 Bd6 7. e5 Bxe5 8. dxe5 Nfd7 9. f4 O-O 10. Bd3 f5

[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] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d3 d6 6. Nbd2 e5 7. c3 Nc6 8. e4 Re8 9. Qc2 d5 10. Re1 h6 11. exd5 Nxd5 12. Ne4 Nb6 13. a3 Kh7 14. c4 a5 15. Bd2 a4 16. Bc3 f5 17. Nc5 Qd6 18. Bb4 Nxb4 19. axb4 Qf8 20. Nxa4 Nxa4 21. Rxa4 Rb8 22. Raa1 c6 23. c5 Qf6 24. Rad1 Be6 25. Nxe5 f4 26. d4 Rf8 27. Qe2 fxg3 28. fxg3 Rbe8 29. Rf1 Qg5 30. Rxf8 Rxf8 31. Rf1 Rxf1+ 32. Kxf1 Bf5 33. Be4 Bxe5 34. dxe5 Be6 35. Bf3 Qc1+ 36. Kg2 Qg5 37. h4 Qe7 38. Qe3 g5 39. Be4+ Kg7 40. hxg5 hxg5 41. Bf3 Bf7 42. Qe4 Be6 43. Qe3 Bd5 44. Bxd5 cxd5 45. Qd4 Qe6 46. Kf3 Kg6 47. Ke3 g4 48. Qd3+ Qf5 49. Qd4 Qf3+ 50. Kd2 Qxg3 51. Qxd5

[Assistant] Kf5


[System] You are a 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: r3kb1r/1pp3pb/p1n1P2p/3n4/7q/2Pp1Q2/PP1P3P/R1BK1BNR w kq - 0 16

[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: r1br2k1/ppp2p2/2n1p1p1/4P1Np/3P1P1P/3Q4/PP3q2/2KR2R1 w - - 3 17

[Assistant] Nxf7


[System] You are a 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/ppR2ppp/8/4r3/8/2P2Q2/PPq2PPP/R4K2 b - - 4 23

[Assistant] Rf5


[System] You are a 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: 7r/6Rp/p2R1p2/7k/r3n2N/1b4P1/5PKP/8 w - - 2 34

[Assistant] Rd8


[System] You are a 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/ppq2p2/8/4p1np/4b1p1/NP4P1/P1Q2PKN/2R2R2 w kq - 0 23

[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. e4 d5 2. d4 dxe4 3. Nc3 e5 4. f3 exd4 5. Nxe4 c5 6. Bc4 Nf6 7. Nxf6+ Qxf6 8. Qe2+ Be7

[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. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Ng5 Ngf6 6. Bc4 e6 7. Qe2 Nb6 8. Bd3 h6 9. Ne4 Qxd4 10. Nf3 Qd8 11. Nxf6+ Qxf6 12. O-O Bd6 13. Be3 Nd5 14. Bd4 Qe7 15. Ne5 Nf4 16. Qg4

[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 c5 2. d3 Nc6 3. b4 e6 4. bxc5 Bxc5 5. c3 Qb6 6. d4 Be7 7. Nf3 d5 8. exd5 exd5 9. h3 Be6 10. Bd3 h6 11. O-O Nf6 12. Ba3 Qd8 13. Bxe7 Qxe7 14. Nbd2 O-O 15. Nb3 Rfe8 16. Nc5 b6 17. Nxe6 Qxe6 18. Re1 Qd7 19. Qc2 Rxe1+ 20. Rxe1 Re8 21. Rd1 Re6 22. Bf5 Qe7 23. Bxe6 Qxe6 24. Re1 Qd7 25. Qe2 Kf8 26. Ne5 Nxe5 27. Qxe5 a5 28. Qb8+ Ne8 29. Qxb6 a4 30. Qc5+ Kg8 31. Qe7 Qxe7 32. Rxe7 Kf8 33. Ra7

[Assistant] Nd6


[System] You are a 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 e6 4. O-O Ne7 5. d3 O-O 6. c4 d5 7. cxd5 Nxd5 8. Nbd2 c5 9. Ne4

[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] FEN: 7r/4n3/p1p1Pk2/1q1p4/3P4/3Q4/5P2/2RR1K2 b - - 2 34

[Assistant] Qxd3+


[System] You are a 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. c3 e5 2. d4 Nc6 3. dxe5 Nxe5 4. Nf3 d6 5. Nxe5 dxe5 6. Qc2 Nf6 7. g3 Bd6 8. Bg2 O-O 9. O-O Bg4 10. Rd1 Qe7 11. h3 Bh5 12. e4 Rad8 13. Bg5 Bxd1 14. Qxd1 Bc5 15. Qc2 h6 16. Bxf6 Qxf6 17. Na3 Rd7 18. Nc4 Rfd8 19. Rf1 b5 20. Ne3 Rd2 21. Qb3 Rxf2 22. Ng4 Rxf1+ 23. Kh2 Qg5 24. Bxf1 Rd2+ 25. Bg2 h5 26. Qxb5 hxg4

[Assistant] Qxc5


[System] You are a 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 g6 3. g3 Bg7 4. e4 d6 5. Bg2 O-O 6. d3 e5 7. Nge2 Nc6 8. O-O Bg4 9. h3 Be6 10. f4 exf4 11. Nxf4 Nd7 12. Kh2 Nd4 13. Be3 a5 14. Nce2 Nxe2 15. Qxe2 c5 16. Rf2 Re8 17. Raf1 Ne5 18. Nxe6 Rxe6 19. b3 Re7 20. Bg5 Qe8 21. Bxe7 Qxe7 22. Qe3 a4 23. Rb1 a3 24. b4 b6 25. bxc5 bxc5 26. Rb5 Nc6 27. Rf1 h5 28. e5 Rc8 29. Bxc6 Rxc6 30. Qf3 Rc7 31. exd6 Qxd6 32. Rb8+ Kh7 33. Rb7 Rxb7 34. Qxb7

[Assistant] Qxd3


[System] You are a 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. e3 g6 3. f4 Bg7 4. Nf3 Nf6 5. c3 O-O 6. Bd3 Nbd7 7. O-O Re8 8. Nbd2 e5 9. Qc2 c6 10. e4 Nf8 11. dxe5 dxe5 12. fxe5 Ng4 13. Nc4 Nxe5 14. Ncxe5 Bxe5 15. Nxe5 Rxe5 16. Bc4 Be6 17. Bxe6 Rxe6 18. Bh6 Qe7 19. c4 Rxe4 20. Qc3 Qe5 21. Qb3 Re8 22. Qxb7 Qe7 23. Qb3 c5 24. Qc3 Qe5 25. Qxe5 R4xe5 26. Rf2 f5 27. Raf1 Re2

[Assistant] g4


[System] You are a 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. d4 e5 3. dxe5 Nxe5 4. Be2 Nc6 5. Nf3 Bc5 6. O-O d6 7. Nc3 Nf6 8. Bg5

[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: 1k1r1b1r/1p3ppp/p1pp4/8/2P1P3/1Q2Bq1P/PP3P2/R3K2R w KQ - 0 18

[Assistant] Ba7+


[System] You are a 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: Qn5r/p1q3kp/1p4p1/5p2/3B1P2/8/Pb4PP/3R1RK1 b - - 3 25

[Assistant] Bxd4+


[System] You are a 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/p3k1p1/Pp1pB1Pp/1PpPbPp1/2K5/7R/8 b - - 1 65

[Assistant] Kf5


[System] You are a 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 b6 2. d4 Bb7 3. Nbd2 Nf6 4. e4 c5 5. e5 Nd5 6. c4 Nc7 7. d5 d6 8. Bd3 e6 9. dxe6 Nxe6 10. O-O dxe5 11. Nxe5 Nd7 12. Nxf7 Kxf7 13. Qh5+ g6 14. Bxg6+ hxg6 15. Qxh8 Qc7 16. Re1 Bg7 17. Qh4 Rh8 18. Qg4 Qxh2+ 19. Kf1 Qh1+ 20. Ke2 Nd4+ 21. Kd3

[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. e4 e6 2. d4 d5 3. Nd2 c5 4. Ngf3 cxd4 5. exd5 Qxd5 6. Bc4 Qd6 7. Nb3 Nc6 8. Nbxd4 Qb4+ 9. Nd2 Nxd4 10. c3 Qd6 11. cxd4

[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. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bf5 5. Bf4 c6 6. c3 Nf6 7. Be2 Bd6 8. Bxd6 Qxd6 9. Nbd2 Nbd7 10. Qb3 O-O 11. O-O Rfe8 12. Rfe1 a5 13. a4 b6 14. Nf1 Ne4 15. Ng3 Nxg3 16. hxg3 Bg6 17. Nh4 Rab8 18. Nxg6 hxg6 19. Bf3 Nf6 20. Rxe8+ Nxe8 21. Re1 Nf6 22. Qc2 b5 23. axb5 Rxb5 24. Qe2 a4 25. Qe5 Qxe5 26. dxe5 Ne4 27. Bxe4 dxe4 28. Rxe4 Rxb2 29. Rxa4 Rb1+ 30. Kh2 Rb6 31. f4 c5 32. Ra5 Rc6 33. c4 Kf8 34. g4 Ke7 35. Kg3 Ke6 36. Kf3 f5 37. g5 Kd7 38. Ra7+ Rc7 39. Rxc7+ Kxc7 40. Ke3 Kc6 41. Kf3 Kd7 42. g4 Kc6 43. gxf5 gxf5 44. g6 Kd7

[Assistant] Kg3


[System] You are a 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: r5k1/1p3pp1/pq5p/8/1P4Q1/P2pB2P/2bNnPP1/2R3K1 w - - 4 25

[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] 1. e4 e6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Nc3 Be7 6. d4 b6 7. Be3 Bb7 8. Be2 Nbd7 9. O-O c5 10. dxc5 Nxc5 11. Qxd8+ Rxd8 12. Rad1 O-O 13. Nd4 Nce4 14. Nxe4 Bxe4 15. c3 Bc5 16. Bf3 e5 17. Bxe4 Nxe4 18. Nc6 Rxd1 19. Rxd1 Bxe3 20. fxe3 f6 21. Rd7 Nc5 22. Rxa7 h6 23. Ne7+ Kh7 24. Nd5 Rd8 25. c4 b5 26. b3 bxc4 27. bxc4 Ne4 28. Kf1 Nd2+ 29. Ke2 Nxc4 30. Nxf6+ Kg6 31. Ne4 Rb8 32. Ra6+ Kh7

[Assistant] Nd6


[System] You are a 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 d5 4. Nf3 c5 5. e3 Nc6 6. a3 a6 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. O-O Be7 11. Qe2 O-O 12. Rd1 cxd4 13. exd4 Qc7 14. Bg5 Rad8 15. Rac1 Qb8 16. Bb1 h6 17. Bxf6 Bxf6 18. d5 Ne5 19. Ne4 Bxd5 20. Nxf6+ gxf6 21. Nd4 Ng6 22. Nxe6 fxe6 23. Bxg6 Qf4 24. Bd3 Qg5 25. f3 Rc8 26. Rc3 Rxc3 27. bxc3 Rc8 28. Be4

[Assistant] Qe5


[System] You are a 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. c3 c5 4. dxc5 d6 5. cxd6 exd6 6. Be3 Ne7 7. Bb5+ Nbc6 8. Bd3

[Assistant] 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. d4 d5 2. Nf3 c6 3. Bg5 Bg4 4. Bh4 Bxf3 5. exf3 Qb6 6. b3 e5 7. dxe5 Qb4+ 8. Nd2 Qxh4 9. Bd3 Nd7 10. Qe2 O-O-O 11. g3 Qh6 12. f4 f6 13. e6 Nc5 14. Bf5 Ne7 15. Bg4 f5 16. Bf3 Qxe6 17. Kf1 Qxe2+ 18. Kxe2 Ne4 19. Bxe4 fxe4

[Assistant] Nf1


[System] You are a 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: 5k2/pp3p1p/1bb1pn2/6p1/2B2N2/1P2PP1P/PB3KP1/8 w - - 0 23

[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] FEN: 2r3k1/pp3p1b/5Ppp/4P3/1q1n2Q1/3r3P/8/3R1K1R w - - 0 35

[Assistant] Qxc8+


[System] You are a 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/p4npp/1p3qn1/2pP4/4QP2/1P6/P4P1P/R3R1K1 w - - 1 22

[Assistant] Qe8+


[System] You are a 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. c3 Bg7 4. h3 O-O 5. Bf4 d6 6. Bh2 Nc6 7. e3

[Assistant] Nd7


[System] You are a 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. Nf3 cxd4 3. Bg5 Nf6 4. Bxf6 exf6 5. Nxd4 Be7 6. Nb3 Nc6 7. c3 d5 8. e3 Be6 9. Bd3 Qd7 10. Qh5 g6 11. Qh6 Bf8 12. Qf4 Bg7

[Assistant] Nc5


[System] You are a 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: r2r2k1/3n2pp/p2Qp3/6q1/4b3/8/PPP1N1PP/1K1R3R w - - 0 19

[Assistant] Qxe6+


[System] You are a 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: 4rr2/5pk1/2R1bq1p/p2p2p1/8/2PB1Q2/PP3PPP/4R1K1 b - - 2 24

[Assistant] Qxf3


[System] You are a 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 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bd3 Bg4 8. c3 Qd5 9. Be2 e6 10. O-O Bd6 11. Ne5 Bxe2 12. Qxe2 O-O 13. Bf4 Rad8 14. Bg5 Be7 15. Bf4 c5 16. Rfd1 cxd4 17. Rxd4 Qa5 18. b4 Qa3 19. Rad1 Qxc3 20. Rxd8 Rxd8 21. Rxd8+ Bxd8 22. Qd1 Be7 23. Nf3 Qxb4 24. h3 Qxf4 25. Qc2 Qe4 26. Qc8+ Bf8 27. Qc7 Qc6 28. Qf4 Nd5 29. Qh4 Bd6 30. Qd8+ Bf8 31. Qh4 Be7 32. Qg4 Bd6

[Assistant] g3


[System] You are a 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: 1Q2b1k1/5ppp/2p1p3/2b1N3/P1PqPP2/3Pn3/6PP/6K1 w - - 0 26

[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. d3 c6 2. Nd2 d6 3. Ngf3 h6 4. g3 Nf6 5. Bg2 e6 6. O-O e5 7. e4 Be7 8. Nc4 O-O 9. Ne3 Re8 10. Bd2 Bf8 11. c3 Qc7 12. Qc2 Nbd7 13. Nf5 a5

[Assistant] g4


[System] You are a 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: 2br2k1/5p2/pN2p3/4P1p1/1p2BnP1/4K3/PP6/7R w - - 2 28

[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. g3 d5 2. Bg2 e6 3. Nf3 Nf6 4. O-O Be7 5. d3 O-O 6. e4 b6 7. e5 Nfd7 8. d4 c5 9. c3 Nc6 10. Re1 Bb7 11. Qe2 f5 12. Bf4 h6 13. h4 Rc8 14. h5 Ncb8 15. Bh3 Ba6 16. Qd1 cxd4 17. cxd4 b5 18. Nc3 Nb6 19. Bf1 Nc4 20. b3 Nb6 21. Nxb5 Qe8 22. Nd6 Bxf1 23. Nxe8 Rcxe8 24. Rxf1 Ba3 25. Qd2 a5 26. Rac1 Bb4 27. Qe2 N6d7 28. Bxh6 Rf7 29. Bg5 Ref8 30. Nh4 Nc6 31. Ng6 Ne7 32. Nxe7+ Rxe7 33. Bxe7 Rf7 34. Rc6 a4 35. Rd6 Bxd6 36. Bxd6 Nf8 37. bxa4

[Assistant] Nh7


[System] You are a 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 b6 2. Bb2 Bb7 3. Nf3 Nf6 4. e3 d6 5. Be2 Nbd7 6. c4 e5 7. Qc2 Be7 8. Nc3 O-O 9. Ng5 h6 10. h4 e4 11. f4 hxg5 12. hxg5 d5 13. cxd5 Nxd5 14. Qxe4 f5 15. Qe6+ Rf7 16. g6 Qf8 17. Nxd5 Bxd5 18. Qxd5 Nc5 19. Bc4 Rd8 20. gxf7+

[Assistant] Qxf7


[System] You are a 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 Nf6 3. d4 Nxe4 4. Nxe5 d6 5. Nc4 Qf6 6. Be3 d5 7. Ncd2 Bf5 8. Nxe4 dxe4 9. c4 Bb4+ 10. Nc3 O-O 11. Be2 Qg6 12. g3 Bxc3+ 13. bxc3 Bh3 14. Qd2 b6 15. O-O-O Rd8 16. Rhg1 Qd6 17. Kb1 Nc6 18. Qb2 Rd7 19. d5 Ne5 20. Bd4 Rad8 21. Bxe5 Qxe5 22. f3 exf3 23. Bxf3 Qf5+ 24. Qc2 Qxf3 25. Rd3 Bf5 26. Rxf3 Bxc2+ 27. Kxc2 Re8 28. Rd1 Rde7 29. Rd2 Re2 30. Rd3 Rxd2+ 31. Kxd2 h6 32. d6 cxd6 33. Rxd6 Kf8 34. Rd7 Re7 35. Rd8+ Re8 36. Rd5

[Assistant] Ke7


[System] You are a 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: 5k2/1R6/r4pK1/1p3Pp1/1P2P3/7p/8/8 w - - 4 50

[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] FEN: 8/8/5pp1/3p1k1p/3PP2P/5KP1/8/8 b - - 0 51

[Assistant] dxe4+


[System] You are a 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/p1p1Q1pk/K7/3r4/8/p3R1P1/1q6/8 w - - 0 42

[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] FEN: 4rk2/p4p2/1ppq2p1/6Rp/P4P2/2Q4P/2P3PK/8 w - - 4 32

[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: r4rk1/pp3ppp/8/2p2q2/3R1P2/1PQ1N2P/PP1R4/2K5 b - - 1 23

[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 g6 2. Nc3 Bg7 3. f4 e6 4. Nf3 Ne7 5. Bc4 O-O 6. f5 d5 7. fxe6 fxe6 8. Bb3 c5 9. d3 Nbc6 10. O-O Nd4 11. Bg5 Nxb3 12. axb3 Qd6 13. Bxe7 Qxe7 14. exd5 Bxc3 15. bxc3 exd5 16. Qd2 Bg4 17. Rae1

[Assistant] Qd6


[System] You are a 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: r4rk1/2q2ppp/pp6/2p5/3b4/1P4P1/PB3PKP/2RQR3 w - - 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] FEN: 5bk1/4pn1p/1R2Q1p1/3Ppp2/Pq2P3/1P5P/5PP1/6K1 b - - 5 33

[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] FEN: 8/1QPq1pkp/6p1/5p2/K7/1P5P/6P1/8 w - - 7 46

[Assistant] Ka5


[System] You are a 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: 5b2/p4kpR/1p2pp1P/8/6R1/4N3/r3r1P1/6K1 w - - 1 36

[Assistant] hxg7


[System] You are a 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 e5 3. dxe5 Ne4 4. Nf3 d6 5. exd6 Bxd6 6. e3 Nc6 7. Be2 Bg4 8. O-O Qf6 9. Nbd2 Nxd2 10. Bxd2 Qh6 11. h3 Bxh3 12. gxh3 Qxh3 13. Re1

[Assistant] Qg4+


[System] You are a 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/pp3p2/2p3p1/8/2P2pq1/P2B4/1PK4R/7R w - - 0 26

[Assistant] Rh8+


[System] You are a 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. Nc3 Ne7 3. f4 c6 4. d4 d5 5. e5 Ng6 6. Nf3 f6 7. Bd3 f5 8. h4 Nd7 9. h5 Ne7 10. O-O g6 11. Ng5 Nb6 12. g4 fxg4 13. Qxg4 Nf5 14. hxg6 hxg6 15. Nh7 Rxh7 16. Qxg6+ Rf7 17. Bxf5 exf5 18. e6 Qf6 19. exf7+ Qxf7 20. Qxf7+ Kxf7 21. Bd2 Nc4 22. Bc1 Bg7 23. b3 Bxd4+ 24. Kg2 Bxc3 25. Rb1 Nd6 26. Ba3 Ne4 27. Rh1 c5 28. Rh7+ Bg7 29. Rbh1 Be6 30. Bb2 Rg8 31. Bxg7 Rxg7+ 32. Rxg7+ Kxg7 33. Kf3 Kf6 34. Rg1 Bf7 35. Rh1 Bh5+ 36. Rxh5 Nd6 37. Rh6+ Ke7 38. Rh8 Nf7 39. Rh7 Ke6 40. Kg3 Nd6 41. Rh6+ Ke7 42. Kh4 Nf7 43. Kh5 c4 44. Rh7 cxb3 45. cxb3 d4 46. b4 d3 47. Rxf7+ Kxf7 48. Kg5 d2 49. Kxf5 d1=Q

[Assistant] Ke4


[System] You are a 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. g3 c6 3. Bg2 Nf6 4. O-O g6 5. b3 Bg7 6. Bb2 Kf8 7. d3 Nbd7 8. e3 Qc7 9. Nbd2 e5 10. Qe2 h6 11. c4 dxc4 12. Nxc4 e4 13. dxe4 Nxe4 14. Bxg7+

[Assistant] Kxg7


[System] You are a 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 Nf6 3. Bf4 e6 4. e3 Bd6 5. Ne5 Nbd7 6. Nd2 O-O 7. Qf3 Ne8 8. Bd3 f6 9. Qh5 f5 10. c3 Nef6 11. Qh4 Ne4 12. Qxd8 Rxd8 13. f3 Nxd2 14. Kxd2 Bxe5 15. dxe5 Nc5 16. Bc2 Bd7 17. h3 a5 18. g4 g6

[Assistant] Rag1


[System] You are a 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. Nf3 e6 3. b3 d5 4. Bb2 Be7 5. cxd5 exd5 6. g3 O-O 7. Bg2 c6 8. O-O Bf5 9. d3 Nbd7 10. Nbd2 Bg6 11. Rc1 Nb6 12. h3 Re8 13. Nd4 Bd6 14. Re1 Nfd7 15. N4f3 f5 16. a4 f4 17. a5 fxg3 18. fxg3 Nc8 19. g4 Bg3 20. Rf1 Nf6 21. e4 dxe4 22. dxe4

[Assistant] Qd3


[System] You are a 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 Nf6 3. Bf4 e6 4. e3 Bd6 5. Bg5 h6 6. Bh4 g5 7. Bg3 Be7 8. c4 h5 9. Nxg5 h4 10. Be5 Nbd7 11. Nf3 Nxe5 12. Nxe5 c6 13. Nc3 Nd7 14. cxd5 cxd5 15. Nf3 Nf6 16. h3 Bd7 17. Be2 a6 18. Rg1 Qb6 19. Qb3 Qc7 20. O-O-O Rc8 21. Kb1 b5 22. Rc1 Qd6 23. Ne5 O-O 24. g3 hxg3

[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] FEN: 8/1p6/p1p1P3/3p4/3P4/2P1nk2/PP1K1R2/8 b - - 0 49

[Assistant] Kxf2


[System] You are a 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: 6k1/2b2p1p/2p3P1/1pPqp2P/1P2K3/3Q4/8/n5R1 w - - 1 38

[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] FEN: r3qrk1/pb1pb1p1/2n1pnQB/1pp1N3/3P4/2P4P/PPBN1PP1/R3R1K1 b - - 0 19

[Assistant] Qxg6


[System] You are a 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/3b3p/p1p4q/1pPp4/1P1Pp3/4P2P/P4QR1/3N3K w - - 3 34

[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. d4 Nf6 2. Nf3 c5 3. e3 g6 4. Be2 cxd4 5. exd4 Bg7 6. O-O O-O 7. Bg5 d5 8. c3 Nc6 9. Re1 h6 10. Bh4 g5 11. Bg3 Ne4 12. Nbd2 Nxg3 13. hxg3 a6 14. Bf1 Bg4 15. Qc2 Rc8 16. Qd3 b5 17. Ne5 Nxe5 18. dxe5 e6 19. a4 Qb6 20. axb5 axb5 21. Qxb5 Qxb5 22. Bxb5 Rb8 23. Ra5 Rfc8 24. Nb3 Bf5 25. Nd4 Bg6 26. f4 Bf8 27. f5 exf5 28. Re2 Bc5 29. Bd7 Rc7 30. Bxf5 Bxd4+ 31. cxd4 Bxf5 32. Rxd5 Be6

[Assistant] Rd6


[System] You are a 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 exd4 3. exd4 d5 4. c3 Nf6 5. f4 c6 6. Nf3 Bd6 7. Bd3 O-O 8. O-O Re8 9. Qc2 Bg4 10. Ne5 h6 11. h3 Be6 12. Nd2 Nbd7 13. Ndf3 Qc7 14. Bd2 Bxe5 15. fxe5 Nh5 16. Rae1 Ng3 17. Rf2 f6 18. Bf4 fxe5 19. Bxg3 Rf8 20. Nxe5 Nxe5 21. Bxe5 Qd7 22. Ref1 Rxf2 23. Rxf2

[Assistant] Rf8


[System] You are a 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: 6k1/7p/p1R3pB/p4p2/4p3/1P4rP/P4b1K/8 w - - 0 38

[Assistant] Rf6


[System] You are a 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 f5 4. Ng3 f4 5. Ne4 Nf6 6. d3 Nxe4 7. dxe4 e5 8. Nf3

[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 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 c5 6. dxc5 Qa5 7. cxd6 Nxe4 8. Bd2 Nxc3 9. bxc3 Bxc3 10. Bd3 exd6 11. Qe2+ Be6 12. Ng5 Bxd2+ 13. Qxd2 Qxd2+ 14. Kxd2 O-O 15. Rhe1 Nc6 16. Nxe6 fxe6

[Assistant] Rxe6


[System] You are a 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 Nf6 4. Nf3 cxd4 5. Qxd4 Nc6 6. Qh4 d4 7. Nd5 Nxd5 8. cxd5 Qxd5 9. Bd2 e5 10. O-O-O Be7 11. Qg3 Qxa2 12. e4 Be6 13. Bd3 Bb3 14. Bc2

[Assistant] Ba3


[System] You are a 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. Nf3 d5 3. e3 Nf6 4. Bd3 Bd6 5. Nbd2 c5 6. O-O c4 7. Be2 Nbd7 8. b3 e5 9. bxc4 e4 10. cxd5 exf3

[Assistant] Bxf3


[System] You are a 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: 8/5p2/Q2qk2p/4p1p1/1P4P1/5PKP/8/8 w - - 1 48

[Assistant] Qxd6+


[System] You are a 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: 5r2/8/R7/4k3/2B5/1P1nP1P1/2r2P1P/5K2 w - - 2 49

[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] FEN: 2r2rk1/1b3ppp/p2p1qn1/1p3N2/4P3/3Qp3/PPP3PP/R4R1K w - - 0 21

[Assistant] Nh6+


[System] You are a 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 e6 3. b3 Nf6 4. g3 Nbd7

[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 c5 2. d5 Nf6 3. c4 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 Be7 7. h3 Nbd7 8. Nf3 O-O 9. Bd3 Re8 10. O-O Nf8 11. Bf4 Ng6 12. Bh2 Bf8 13. Nd2 a6 14. a4 Bd7 15. Re1 Rb8 16. a5 Qc8 17. Nc4 Bxh3 18. gxh3 Qxh3 19. Bf1 Qh6 20. Bg2 Nh4 21. Bg3 Ng6 22. Nxd6 Bxd6 23. Bxd6 Rbd8 24. Bg3 Qg5 25. e5 Nxe5 26. Qc1 Qf5 27. Ne4 Nxe4 28. Bxe4 Qg4 29. Qf4 Qh5 30. Bg2 f6 31. Rad1 h6 32. Rc1 c4 33. d6 Rxd6 34. Bxb7 Red8 35. Bxa6 Nf3+ 36. Kg2 Nxe1+ 37. Rxe1 Rd4 38. Qf3

[Assistant] Qg6


[System] You are a 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 c6 4. d3 d6 5. O-O Nd7 6. e4 e5 7. c3 Nh6 8. Bg5 f6 9. Bd2 O-O 10. Qc1 Nf7 11. Na3 Qe7 12. Nc4 f5 13. Re1 fxe4 14. dxe4 Nf6 15. a4 h5 16. Ng5 Nxg5 17. Bxg5 Be6 18. Ne3 Qf7 19. Qd2 Nh7 20. h4 Nxg5 21. hxg5 Qe7 22. Rad1 Rad8 23. c4 Qxg5 24. b3 h4 25. Nf1 Qxd2 26. Rxd2 hxg3 27. Nxg3 Bh6 28. Rd3 Bg4 29. Nf1 Rf7 30. f3 Be6 31. Red1 Rfd7 32. Ne3 Bf4 33. Kf2 Kf7 34. Rh1 Kf6 35. Ng4+ Bxg4 36. fxg4 Kg5 37. Bf3 Rf7 38. Ke2 Rf6 39. Rh3 c5 40. Rd1 Rdf8 41. Rdh1 R6f7 42. Rh7 b6 43. Rxf7 Rxf7 44. Rh8 Bc1 45. Rh3 Bb2

[Assistant] Ke3


[System] You are a 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: 4k3/ppp1P2p/2b2P1K/8/8/r1P4P/8/4R3 w - - 0 37

[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: 8/8/5rk1/5ppq/5Q2/5PR1/5PK1/8 w - - 5 52

[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] 1. e4 g6 2. Nc3 Bg7 3. d4 b6 4. Be3 Bb7 5. f3 e6 6. Qd2 Ne7 7. O-O-O O-O 8. Bh6 d6 9. Bxg7 Kxg7 10. h4 Nd7 11. h5 Rh8 12. hxg6 hxg6 13. Nh3 f5 14. Bd3 Ng8 15. exf5 exf5 16. g4 Ne7 17. gxf5 Nxf5 18. Bxf5 gxf5 19. Rdg1+ Kf8 20. Nf4 Rxh1 21. Rxh1 Qf6 22. d5 Ne5 23. Ne6+ Ke7 24. Rh7+ Nf7 25. Ng5 Rf8 26. Qe3+ Kd7 27. Qe6+ Qxe6 28. dxe6+ Ke7 29. Rxf7+ Rxf7 30. exf7 d5 31. f4

[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] FEN: 1r4k1/2qb1pp1/p1p2n1p/3pr3/1P5Q/P1NB1P2/2P3PP/R3R2K b - - 0 21

[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] 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Nf3 Bg4 6. Be3 e5 7. d5 Nd4

[Assistant] Be2


[System] You are a 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: 1q3k2/1p1b3r/2pb1BP1/8/1P4Q1/6pP/7K/1B1R4 w - - 0 36

[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: 1r2r1k1/Q1p3pp/6q1/2nb4/8/5P2/PPP3PP/RNB2RK1 b - - 0 19

[Assistant] Bxf3


[System] You are a 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: 5rk1/5ppp/3p4/1p1P1N2/p5Q1/3P3P/Pq2r1P1/5RK1 w - - 2 24

[Assistant] Nh6+


[System] You are a 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. Bc4 Qc7 5. Bb3 Nc6 6. Nf3 Be7 7. O-O Nf6 8. cxd4 exd4 9. e5 Ng4 10. Nxd4 Nxd4 11. Qxd4 Nxe5 12. Bf4 d6 13. Nc3 Be6 14. Nd5 Bxd5 15. Qxd5 O-O 16. Rac1 Qb6 17. Be3 Qd8 18. Rfd1 Rc8 19. Bxa7 Rxc1 20. Rxc1 Qa8 21. Be3 Rc8 22. Rxc8+ Qxc8 23. h3 Qe8 24. Qxb7 g6 25. a4 Kg7 26. a5 Nc6 27. Ba4 Nxa5 28. Qb4 Qa8 29. Qd4+ Bf6 30. Qxd6 Nc4 31. Qc6 Qxc6 32. Bxc6 Nxe3

[Assistant] fxe3


[System] You are a 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 e5 3. dxe5 Ng4 4. Bf4 Nc6 5. Nf3 Bb4+ 6. Nbd2 Qe7 7. e3 Ncxe5 8. Nxe5 Nxe5 9. Be2 Qd6 10. O-O Bxd2 11. Bxe5 Qxe5 12. Qxd2 O-O 13. Rad1 d6 14. Qd4 Qe7 15. b3 Be6 16. Bf3 Rab8 17. g3 a6 18. Qa7 Rfd8 19. h4 Qd7 20. Rd4 Bh3 21. Rfd1 Bf5 22. c5 Qb5 23. cxd6 cxd6 24. Rxd6 Rf8 25. Qb6 Qxb6 26. Rxb6 Be6 27. Rxb7 Rxb7 28. Bxb7 a5 29. Rd6 Rb8 30. Bd5 Bxd5 31. Rxd5 Rc8 32. Rxa5 Rc1+ 33. Kg2 g6 34. b4 Ra1 35. b5 Rb1 36. a4 Kf8

[Assistant] Ra6


[System] You are a 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 e6 3. c3 Be7 4. Nbd2 Nf6 5. Qc2 O-O

[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. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 a6 6. Bxc6 bxc6 7. O-O e6 8. d3 Ne7 9. e5 d5 10. exd6 Qxd6 11. Ne4 Qd5

[Assistant] Be3


[System] You are a 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/2q2ppB/p7/6PQ/1p1pN1b1/6P1/PPP5/2KR1n2 w - - 1 28

[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 d6 2. e5 c6 3. exd6 e5 4. Nf3 Bxd6 5. Nc3 Nd7 6. d4 Qc7 7. dxe5 Nxe5

[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] 1. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 b6 5. g3 Bc5 6. Bg2

[Assistant] dxe4


[System] You are a 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: 8/5pk1/1R4p1/6K1/6PP/8/1P6/5r2 b - - 2 39

[Assistant] f6+


[System] You are a 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. Bf4 Nd7 3. e3 Ngf6 4. Nf3 g6 5. Be2 Bg7 6. O-O O-O 7. c4 Re8 8. Nc3

[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. d4 Nf6 2. e3 e6 3. f4 d5 4. Nf3 c5 5. Bd3 cxd4 6. exd4 Nc6 7. c3 Bd6 8. O-O O-O 9. Qe2 b6 10. Nbd2 Bb7 11. Ne5 Nd7 12. Ndf3 f6 13. Nxc6 Bxc6 14. Qxe6+ Kh8 15. Qxd6 Qc8 16. Qe6 Re8 17. Qf5 g6 18. Qh3 Kg7 19. Nh4 Qc7 20. Bd2 Nf8 21. Qg4 Bd7 22. Qg3 Ne6 23. f5 Qxg3 24. hxg3 Ng5 25. fxg6 hxg6 26. Nxg6 f5 27. Bxg5

[Assistant] Kxg6


[System] You are a 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. g3 e6 3. Bg2 a6

[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. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nge2 d6 6. O-O e5 7. d3 Nge7 8. f4 O-O 9. fxe5 dxe5 10. Nd5 Be6 11. Nec3 Nd4 12. Be3 Qd6 13. Nxe7+

[Assistant] Qxe7


[System] You are a 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/pp3pp1/1kr5/2p5/2P2P2/1P4PQ/P2R1K1P/7q b - - 2 28

[Assistant] Rh6


[System] You are a 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: r4b1r/3k1ppp/p1q1p3/2Npnn2/Q7/P1P1B3/1P3PPP/R3KB1R b KQ - 5 18

[Assistant] Bxc5


[System] You are a 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: 8/3k4/1p1p4/pP1PrRp1/6Pp/3K3P/1PP5/8 b - - 3 40

[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] 1. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. c4 g6 5. O-O e6 6. b3 Bg7 7. Bb2 O-O 8. d3 Nbd7 9. Nbd2 Qe7 10. e4 dxe4 11. dxe4 e5 12. Qe2 a5 13. a3 Rd8 14. Rad1 h6 15. h3 Nh7 16. Ne1 Nc5 17. f4 exf4 18. Bxg7 Kxg7 19. gxf4 a4 20. b4 Ne6

[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. c4 c6 2. g3 d5 3. Bg2 Nf6 4. Nf3 e6 5. O-O Bd7 6. b3 Na6 7. Bb2 Nc7

[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. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 O-O

[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] FEN: r1bq1rk1/pp3ppp/2p5/6b1/3n1Q2/2NB4/PP3PPP/R1B2RK1 w - - 2 16

[Assistant] Qxg5


[System] You are a 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 c6 2. d4 Nf6 3. Nf3 d5 4. Bd3 e6 5. Nbd2 Be7 6. e4 dxe4 7. Nxe4 Nxe4 8. Bxe4 Nd7 9. Bd3 Nf6 10. O-O b6 11. Re1 Bb7 12. c3 O-O 13. Bf4 c5 14. Be5 cxd4 15. Bxd4 Rc8 16. Qd2

[Assistant] Bc5


[System] You are a 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: 1b4k1/P7/1P6/8/8/6pp/5p2/6K1 w - - 0 54

[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: r2qk1nb/pppn1p2/3p4/4Pbp1/2BP1p2/2N2N2/PPP3P1/R1BQK3 w Qq - 4 11

[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] FEN: r7/pp4k1/2n4p/3p2n1/3P1N1R/2P3r1/PPKN4/R7 b - - 1 26

[Assistant] Nxd4+


[System] You are a 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. Bg5 Bg7 4. Bxf6 Bxf6 5. e4 d6

[Assistant] Bd3


[System] You are a 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: 5b1k/pp3p1p/q7/3pPQ2/4nP2/1P2B3/P2p2PP/3R3K b - - 0 27

[Assistant] Qe2


[System] You are a 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: 4k3/pR4Qp/4p3/7P/1p2b3/b7/5P1K/2r5 b - - 3 36

[Assistant] Rh1+


[System] You are a 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: 8/7n/4k2P/7K/6P1/8/8/8 w - - 7 61

[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] FEN: 8/1p2k1pp/P7/5p1P/P1P5/r2K3R/8/8 w - - 1 37

[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. d4 c6 2. c3 g6 3. b3 Bg7 4. Na3 d6 5. Nc2 Nf6 6. Bb2 O-O 7. e3 Bf5 8. f3 Nbd7 9. e4 Be6 10. g3 d5 11. e5 Ne8 12. Nh3 f6 13. f4 fxe5 14. dxe5 Bxe5 15. fxe5 Nxe5 16. Bg2 Bg4 17. Qd4 Qd6 18. Nf4

[Assistant] Bf3


[System] You are a 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: 8/8/8/2pBp3/2PnPk2/2K5/8/8 b - - 17 67

[Assistant] Ke3


[System] You are a 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. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 O-O 12. Nc2 Rb8 13. Bd3 Bg5 14. h4 Bf4 15. Nxf4 exf4 16. Nd4 Ne5 17. Be2 b4 18. Nf3 Nxf3+ 19. Bxf3 bxc3 20. bxc3 Qf6 21. Qd4 Qe5 22. O-O Be6 23. Rfd1 Rfd8 24. Be2 a5 25. a3 a4 26. Qxe5 dxe5 27. Rxd8+ Rxd8 28. Rd1 Rc8 29. Bb5 g6 30. c4 Bxc4 31. Rc1 Be6 32. Rxc8+ Bxc8 33. Bxa4 Bb7 34. Bc2 Kf8 35. g3

[Assistant] Ke7


[System] You are a 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. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. c4 Be7 7. Be3 a6 8. N5a3 Bg5 9. Qd2 Bxe3

[Assistant] Qxe3


[System] You are a 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 Nbd7 7. Bd3 h6 8. Be3 e6 9. O-O b5 10. f4 Bb7 11. a3 Rc8

[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] 1. g3 f5 2. Bg2 Nf6 3. Nh3 Nc6 4. f4 d6 5. Nf2 e5 6. O-O Be7 7. d3 O-O

[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. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. c3 e5 5. Bc4 h6 6. O-O Nf6 7. cxd4 d6 8. dxe5 dxe5

[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] 1. d4 Nf6 2. Nc3 c5 3. d5 d6 4. e4 g6 5. f3 Bg7 6. Bg5 O-O 7. Qd2 e6 8. O-O-O exd5 9. exd5 Nbd7 10. Bh6 a6 11. h4 Ne5 12. h5 Re8 13. Bxg7 Kxg7 14. hxg6 fxg6 15. Qh6+ Kg8 16. Ne4 Ned7 17. Bd3 Qe7 18. Nxf6+ Nxf6 19. Bxg6 hxg6 20. Qxg6+ Qg7 21. Qd3 Bd7 22. Nh3

[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. c4 Nf6 2. Nc3 d6 3. g3 g6 4. Bg2 Bg7 5. e4 O-O 6. d4 Nc6 7. Nge2 e5 8. d5 Ne7 9. O-O Ne8 10. f4 f5 11. fxe5 dxe5 12. c5 Nf6 13. Bg5 h6 14. Bxf6 Bxf6 15. Qd3 a6 16. Rad1 Kh7

[Assistant] h3


[System] You are a 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. g3 e5 7. Nde2 b5 8. Bg2 Bb7 9. O-O Be7 10. h3 O-O 11. f4 Nbd7 12. Be3 Rc8 13. g4

[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. c4 e6 2. Nc3 d5 3. g3 Nf6 4. d4 Be7 5. cxd5 O-O 6. dxe6 Bxe6 7. Bg2 c6 8. Nf3 Bb4 9. O-O Nbd7 10. Rfe1 Nb6 11. e4 Bg4 12. h3 Bxf3 13. Bxf3 Rfe8 14. a3 Bxc3 15. bxc3 Rac8 16. Bd2 c5 17. e5 Nfd5 18. a4 cxd4 19. cxd4 Nc4 20. Be3 Ndxe3 21. fxe3 Qg5 22. Kh2 Nxe3

[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] 1. Nf3 e5 2. e3 e4 3. Nd4 a5 4. Nb3 a4 5. Nd4 c5 6. Ne2 d5 7. d3 f5 8. dxe4 fxe4 9. Nbc3

[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: 5k2/5p2/6pp/3pP3/3p3P/6P1/4KP2/8 w - - 4 42

[Assistant] Kd3


[System] You are a 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. e3 g6 3. Nf3 Bg7 4. b3 Ne7 5. Bb2 O-O 6. Nbd2 Nd5 7. Be2 Ne7 8. O-O d5 9. c4 c5 10. dxc5 Nd7 11. Bxg7 Kxg7 12. Qc2 Nxc5 13. Rfd1 Nf5 14. cxd5 exd5 15. e4 dxe4 16. Nxe4 Nxe4 17. Qxe4 Be6 18. Rxd8 Raxd8 19. Nd4 Nxd4 20. Bc4 Bxc4 21. bxc4 Nf5 22. g3 Rd7 23. Re1 Rfd8 24. Qf4 Nd6 25. Rd1 Nxc4 26. Rxd7 Rxd7 27. Qxc4 f6 28. Qb5 Rf7 29. Qa5 a6 30. Qb6 h6 31. a4 f5 32. a5 Kh7 33. Kg2 Kg7 34. f3 Rf6 35. f4 Rf7 36. Qd4+ Kh7 37. g4 fxg4 38. Kg3 h5 39. Kh4 Kg8 40. Kg5 Rf5+ 41. Kxg6 Rf7

[Assistant] Qd5


[System] You are a 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 Qa5 4. Bc4 c6 5. Nf3 Nf6 6. Qe2 Bf5 7. Nd4 Bg6 8. O-O Qc7 9. Re1 e5 10. Qxe5+ Qxe5 11. Rxe5+ Kd8 12. d3 Bd6 13. Re1 Nbd7 14. Bg5 Kc7 15. Bxf6 Nxf6 16. Bb3 Rhe8 17. h3

[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 Bd7 7. O-O Nh6 8. Bd3 cxd4 9. cxd4 Nxd4 10. Nxd4 Qxd4 11. Nc3 Qxe5 12. Re1 Qd6 13. Qf3 Be7 14. Bf4 Qb4 15. a3 Qxb2 16. Nxd5 exd5 17. Bd6 Ng8 18. Rab1 Qf6 19. Be5 Qxf3 20. gxf3 f6 21. Bd4 Bc6 22. Re6 Kf7 23. Rbe1

[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. c4 c6 2. b3 d5 3. Bb2 Nf6 4. e3 Nbd7 5. Nf3 e6 6. d4 Bd6 7. Bd3 Qe7 8. Ne5 O-O 9. O-O Ne4 10. Nd2 f5

[Assistant] Ndf3


[System] You are a 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 Nc6 2. e4 e5 3. dxe5 Nxe5 4. Nf3 Nxf3+ 5. Qxf3 d6 6. h3 Be6 7. Nc3 Nf6 8. Bd3 g6 9. Bg5 Bg7 10. O-O-O h6 11. Bh4 g5 12. Bg3 Qd7 13. Rhe1 O-O-O 14. Nd5 Bxd5 15. exd5 Kb8 16. Bf5 Qa4 17. Kb1 Rhe8 18. Bd3 Nd7 19. Qxf7 Be5 20. Bxe5 Nxe5 21. Qf5 a6 22. g3 Qb4 23. c3 Qc5 24. Bc2 Nc4 25. Rxe8 Rxe8 26. Rd4 Re1+ 27. Rd1 Re2 28. Qf8+ Ka7 29. Bd3 Rxb2+ 30. Ka1

[Assistant] Rxa2+


[System] You are a 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/p6r/8/8/3K4/4p1k1/7p/5R1B b - - 3 48

[Assistant] e2


[System] You are a 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. Nd2 d5 3. Ngf3 Nf6 4. g3 e5 5. Bg2 e4 6. O-O exf3 7. Nxf3 Be7 8. Re1 O-O 9. e4 Bg4 10. e5 Bxf3 11. Qxf3 Nfd7 12. Bf4 Re8 13. h4 Nf8 14. h5 h6 15. Qg4 Kh8 16. e6 Nxe6 17. Rxe6 fxe6 18. Be5 Bf6 19. Re1 Nd7 20. Bf4 e5 21. Bd2 Bg5 22. f4 exf4 23. Rxe8+ Qxe8

[Assistant] gxf4


[System] You are a 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 Nf6 4. e5 Nfd7 5. f4

[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. e3 d6 2. d4 Nd7 3. f4 c6 4. Nf3 g6 5. g3 Bg7 6. Bg2 Ngf6 7. O-O h5 8. Nbd2 e6 9. e4 Qc7 10. c3 Ng4 11. Qe2 Bf6 12. e5 Be7 13. exd6 Bxd6 14. Ne5 Ngxe5 15. fxe5 Be7

[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] 1. Nf3 c6 2. c4 d5 3. e3 Nf6 4. d4 g6 5. Nc3 Bg7 6. cxd5 cxd5 7. Bd3 Nc6 8. O-O O-O 9. h3 a6 10. Bd2 b5 11. Rac1 Bb7 12. a3 Rac8 13. Na2 Rfe8 14. Nb4 e6 15. Be2 Ne4 16. Nd3 Qe7 17. Bb4 Nxb4 18. Nxb4 Nd6 19. b3 Ne4 20. Nd3 Nc3 21. Qd2 Nxe2+ 22. Qxe2 Qxa3 23. Nc5 Rc7 24. Qd2 a5 25. Rca1 Qb4 26. Qxb4 axb4 27. Ra7 Rb8 28. Rfa1 Bf8 29. Nd3 Rbc8 30. Kh2 Bc6 31. Rxc7 Rxc7 32. Ra8 Kg7 33. Ra6

[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] 1. e4 d5 2. e5 d4 3. Nf3 c5 4. Bc4 Nc6 5. b3 Bg4 6. Bxf7+ Kxf7 7. Ng5+ Ke8 8. Qxg4 Qd5 9. O-O g6 10. Re1 Nxe5 11. Qg3 Bg7 12. c4 dxc3 13. Nxc3 Qd6 14. Nb5 Qc6 15. Ne6 Qxe6 16. Nc7+ Kd7 17. Nxe6 Kxe6 18. Bb2 Nf6 19. Bxe5 Kf7 20. Bxf6 Bxf6 21. Rad1 Rhd8 22. Qf3 Rd4 23. Qe3

[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] 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 O-O 5. h3 d6 6. Bh2 Nbd7 7. Be2 Re8 8. O-O e5 9. c4 e4 10. Nfd2 Qe7 11. Nc3 c6 12. b4 d5 13. c5 Nf8 14. a4 Ne6 15. b5 Bd7 16. a5 a6 17. bxc6 Bxc6 18. Na4 Nd7 19. Nb6 Nxb6 20. axb6 f5 21. Bd6 Qf7 22. f4 exf3 23. Nxf3 f4 24. exf4 Nxf4 25. Bxf4 Qxf4 26. Ne5 Qe3+ 27. Kh1 Bxe5 28. dxe5 Rxe5 29. Bf3 Qxc5 30. Rb1 Rae8 31. Qb3 Kg7 32. Rfc1 Qd6 33. Qb2 Qf6 34. Qd2 d4 35. Bxc6 bxc6 36. b7 Rb8 37. Qb4 Re7 38. Qc5 Rexb7 39. Rxb7+ Rxb7 40. Qxc6 Qxc6 41. Rxc6 Rd7 42. Rc2 d3 43. Rd2

[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: 8/8/2k2p1p/1p2p3/1P2K1PP/P7/8/8 b - - 0 42

[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. Nf3 e5 2. g3 d6 3. d4 f5 4. dxe5 Nc6 5. Bg2 dxe5 6. Qxd8+ Kxd8 7. Bg5+ Be7 8. O-O e4 9. Bxe7+ Kxe7 10. Nfd2 Be6 11. f3 exf3 12. exf3 Nf6 13. Re1 Kf7 14. Nc3

[Assistant] Rhe8


[System] You are a 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 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. g3 Be6 6. Bg2 c6 7. b3 Nd7 8. Nc3 Kc7 9. Bb2 f6 10. O-O-O Nh6 11. Nf3 Nf7 12. h3 a5 13. Nd2 Bc5 14. e3 Be7 15. Nde4 Nc5 16. Nxc5 Bxc5 17. Ne4 Be7 18. f4 exf4 19. exf4 Rad8 20. Rhe1 Rxd1+ 21. Rxd1 Rd8 22. Re1 Bb4 23. Bc3 Bxc3 24. Nxc3 Bc8 25. g4 Bd7 26. Kc2 Re8 27. Rxe8 Bxe8 28. Kd3 Nd6 29. Ne4 Nxe4 30. Bxe4 Kd6 31. h4 b6 32. Bxh7 g6 33. f5 gxf5 34. Bxf5 c5 35. Ke4 Ke7 36. Kf4 Bf7 37. g5 Kf8 38. g6 Be8 39. Ke4 Kg7 40. Kd5 Bxg6 41. Bxg6 Kxg6 42. Kc6 f5 43. Kxb6 f4 44. Kxc5 f3 45. Kd4 f2 46. c5 f1=Q 47. c6 Qc1 48. c7 Qxc7 49. Kd5 Qb7+ 50. Kc4 Qb4+ 51. Kd3 Kh6 52. Kc2 Qa3 53. Kb1 a4 54. b4 Qxb4+ 55. Kc2 a3 56. Kd3 Qb2 57. Ke4 Qxa2 58. Ke5 Qh2+ 59. Kd5

[Assistant] Qxh4


[System] You are a 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: 1r6/pq2b1Qp/p2k2r1/2p1p3/8/P1N5/1PP2PPP/4R1K1 w - - 0 24

[Assistant] Qxe5+


[System] You are a 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 Bb4 4. e5 c5 5. a3 Ba5

[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] FEN: 5rk1/1ppb2p1/p2p2Bp/3P4/2n5/2B5/P5PP/5RK1 w - - 4 27

[Assistant] Bh7+


[System] You are a 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: 5rk1/1R3pb1/3pp1pp/2p4n/2B1P2B/3P1Q1P/5PPK/4q3 w - - 6 30

[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] 1. g3 d6 2. Bg2 g6 3. Nf3 Bg7 4. O-O e5 5. d4

[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] FEN: r1bqk2r/pp2ppb1/3p1np1/3P3p/1n2P2P/2NB1N2/PP3PP1/R1BQK2R w KQkq - 1 10

[Assistant] Qa4+


[System] You are a 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 d6 4. Bc4 Nf6 5. O-O O-O 6. Re1 Nbd7 7. c3 a6 8. Bb3 b5 9. h3 Bb7 10. Nbd2 e5 11. Bc2 Qe7 12. a3 Rfe8 13. Nf1 Rad8 14. Bd2 Nd5 15. Rc1 f5 16. Bd3 e4 17. c4 N5f6 18. cxb5 exd3 19. bxa6 Bxa6 20. Rxc7 Nd5 21. Ra7 Ra8 22. Rxa8 Rxa8 23. Qb3 Qf7

[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 e6 2. g4 d5 3. Bg2 f5 4. gxf5 exf5 5. c4 Nf6 6. cxd5 Bd6 7. Nc3 O-O 8. b3 Nbd7 9. Bb2 Nb6 10. Nge2 Qe7 11. Qc2 Bd7 12. O-O-O a5 13. a4 c6 14. dxc6 bxc6 15. Nd4 c5 16. Nxf5 Bxf5 17. Qxf5 c4 18. Bxa8 Rxa8 19. bxc4 Nxc4 20. Nd5 Qb7 21. Nxf6+ gxf6 22. Qe6+ Kf8 23. Qxf6+ Ke8 24. Qe6+

[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: 8/7p/3p2p1/3Pp3/3qk3/7P/6PK/3Q4 w - - 0 47

[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: 7R/8/1p6/p3K3/2r2Nk1/7p/8/8 b - - 6 60

[Assistant] Rxf4


[System] You are a 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. c4 d6 3. d4 Nf6 4. g3 g6 5. Bg2 Bg7 6. Nc3 O-O 7. O-O Bg4 8. Rb1 Nbd7 9. e3

[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: 8/8/p7/1pp2kRr/5P2/2PK4/P7/8 b - - 4 41

[Assistant] Rxg5


[System] You are a 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: R7/1k1r1p2/1pp5/4Pqpp/1QP5/5N2/5PnP/5R1K b - - 0 28

[Assistant] Qxf3


[System] You are a 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: 5r2/1pp3pk/3ppq1p/7P/3RPrP1/pP1Q1P2/P1P5/1K3R2 w - - 1 26

[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] FEN: 6r1/p3kp2/4p3/2p4P/3p1P2/5KP1/q1P5/1R2Q3 w - - 0 31

[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: 8/p5k1/1p4pp/5p2/P1pP1P2/2P4P/1PQBrqP1/3R3K b - - 1 34

[Assistant] Qxg2#


[System] You are a 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. Nc3 d6 4. f4 a6 5. Nf3 b5 6. a3 Bb7 7. Be3 Nd7 8. Bd3 c5 9. dxc5 dxc5 10. e5 Qc7 11. Be4 Bxe4 12. Nxe4 Qc6

[Assistant] Nfd2


[System] You are a 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. Nd2 d6 3. g3 Nc6 4. Bg2 Bh3 5. Ngf3 Bxg2 6. Rg1 Bxf3 7. Nxf3 e5 8. Bd2 Be7 9. e4 h5 10. Qe2 h4 11. O-O-O hxg3 12. hxg3 Qd7 13. Kb1 O-O-O 14. g4 Nxg4 15. Ng5 Bxg5 16. Bxg5 f6 17. Bd2 Nh6 18. f3 Rdg8 19. a3 Nf7 20. f4 exf4 21. Bxf4 g5 22. Be3 Nfe5 23. Qf2 Ng4 24. Rxg4 Qxg4 25. Rf1 Qd7 26. Bd2 Kb8 27. Bc3 Rh6 28. Qe1 Rf8 29. Qd2 f5 30. Rd1 f4 31. Qg2

[Assistant] g4


[System] You are a 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 Nf6 3. Nc3 e6 4. e4 exd5 5. exd5 d6 6. Be2 g6 7. Nf3 Bg7 8. O-O O-O 9. h3 Nbd7 10. Re1 Nb6 11. Bf4 Bf5 12. Bd3 Bxd3 13. Qxd3 Qd7 14. a4 c4 15. Qd2 a5 16. Re2 Rfe8 17. Rae1 Nh5 18. Bh2 Nf6 19. Qd4 Nfxd5 20. Qd2 Nxc3 21. bxc3 Nxa4 22. Qxd6 Qxd6 23. Rxe8+ Rxe8 24. Rxe8+ Qf8 25. Rxf8+ Bxf8 26. Nd2 b5 27. Bc7 Nxc3 28. Bxa5 Ne2+

[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: r4rk1/pp3q1b/2p1R2Q/7N/2Pb1PpP/8/PP4P1/R6K w - - 6 25

[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. Bf4 Bg4 3. Bg3 Bh5 4. Nf3 Bg6 5. e3 e6 6. Bd3 Nf6 7. Bxg6 hxg6 8. O-O Ne4 9. Re1 Nxg3 10. hxg3 Nc6 11. Kf1 Ne7 12. Ke2 Nf5 13. c3 Nd6 14. Ng5 Qxg5 15. f4 Qxg3 16. Kd3 Qxg2 17. Nd2 Nc4 18. Kc2 Rh2 19. Kb3 Nxd2+ 20. Ka4 Nc4 21. Qb3 Qxb2 22. Qxb2

[Assistant] Nxb2+


[System] You are a 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 b6 2. Bg2 Nc6 3. c4 Bb7 4. Nc3 Na5 5. Bxb7 Nxb7 6. Nf3 e6

[Assistant] 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] FEN: 3qr2k/6pp/8/5p2/5P2/2rp1Q1R/P5PP/4R2K w - - 2 31

[Assistant] Rxh7+


[System] You are a 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. Nc3 Nf6 5. Nf3 c6 6. Bd3 Be7 7. Bg5 O-O 8. O-O Re8 9. Re1 Bg4 10. Qd2 Nbd7 11. Ne5 Nxe5 12. dxe5 Nd7 13. Bxe7 Qxe7 14. f4 Qe6 15. h3 Bf5 16. g4 Bxd3 17. cxd3 h5 18. Qg2 hxg4 19. hxg4 Qg6 20. d4 Nb6 21. f5 Qg5 22. Ne2 Nc4 23. Ng3 Nd2 24. Nh5 Ne4 25. Ng3 Qxg4 26. Nxe4 Qxg2+ 27. Kxg2 dxe4 28. Rxe4 g6 29. fxg6 fxg6 30. Rg4 Kg7 31. Kf3 Re6 32. Ke4 Rf8 33. Rag1 Rd8 34. Ke3 Rd5 35. Rg5 c5 36. dxc5 Rdxe5+ 37. Kd4 Rxg5 38. Rxg5 Rc6 39. Kd5 Kf6 40. Rg1 g5 41. Rf1+ Kg6 42. Rg1 g4 43. b4 Kg5 44. b5 Rf6 45. c6 bxc6+ 46. bxc6 Rf5+ 47. Kd6 Rf2 48. a4 Rd2+ 49. Ke7 Rc2 50. Kd7 Kf4 51. c7 g3 52. c8=Q Rxc8 53. Kxc8 a5 54. Rxg3 Kxg3 55. Kb7 Kf4 56. Kb6 Ke5 57. Kxa5 Kd6 58. Kb6 Kd7 59. a5 Kc8 60. a6 Kb8 61. Kc6 Ka8 62. Kb5 Ka7 63. Ka5 Ka8

[Assistant] Kb5


[System] You are a 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. Nc3 e6 5. g4 Bg6 6. Nge2 h6 7. Nf4 Bh7 8. Bd3 Ne7 9. Bxh7 Rxh7 10. Qd3 Rh8 11. Nce2 c5 12. c3 Nbc6 13. O-O Qb6 14. Rd1 g6 15. dxc5 Qxc5 16. Be3 Qc4 17. b3 Qxd3

[Assistant] Nxd3


[System] You are a 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: r3qrk1/p1p3pp/1bpp4/4p3/1PP1P3/P1Q4P/5PP1/R1B2RK1 b - - 0 16

[Assistant] Bd4


[System] You are a 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 e6 3. d4 d5 4. Be2 c5 5. O-O cxd4 6. Nxd4 Nc6 7. Nxc6 bxc6 8. c4 Bd6 9. cxd5 exd5 10. Qa4 O-O 11. Nc3 Bb8 12. Qxc6 Bd7 13. Qa6 Qc7 14. g3 Bh3 15. Rd1 Qe5 16. Bf3 Bd6

[Assistant] Nxd5


[System] You are a 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. e4 g6 3. g3 Bg7 4. Bg2 Nc6 5. d3 d6 6. Be3 e6 7. Qd2 Nd4 8. Nd1 Rb8 9. c3 Nc6 10. d4 cxd4 11. cxd4 d5 12. exd5 exd5 13. Nc3 Nge7 14. Nge2 O-O 15. Nf4 Nf5 16. Ncxd5 Ncxd4 17. Bxd4 Nxd4 18. O-O Bf5 19. Rac1 Re8 20. Ne3 Be4 21. Rfd1

[Assistant] Bf3


[System] You are a 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 e5

[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. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nc3 g6 6. g3

[Assistant] Bg7


[System] You are a 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: r1b2rk1/p1pp1pp1/2pb2qp/8/4PnQ1/1BN1B3/PPP3PP/R3KR2 w Q - 4 15

[Assistant] Rxf4


[System] You are a 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: r2q3k/ppp2Q1p/3p1p1N/2b5/2B1Pp2/2PP2rb/PP3P2/R4RK1 w - - 0 19

[Assistant] Kh2


[System] You are a 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. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. Bg2 Nb6 7. d3 Be7 8. Be3 O-O 9. Qd2 Re8 10. O-O Bf8 11. Rfc1 Nd4 12. Ne4 c6 13. Nc5 g6 14. Bg5 f6 15. Be3 Kg7 16. Bh6+ Kg8 17. Bxf8 Rxf8 18. e3 Ne6 19. b4 Nxc5 20. bxc5 Nd5 21. d4 e4 22. Ne1 f5 23. Rab1 Rf7 24. Nc2 Be6 25. Nb4 Nxb4

[Assistant] Rxb4


[System] You are a 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. d4 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. Be2 O-O 8. O-O Re8 9. b3 Qe7 10. e4 Nxe4 11. Nxe4 dxe4 12. Qxe4 e5 13. Bb2 Nf6 14. Qh4 e4 15. Ne5 Bf5 16. Rfe1 Rad8 17. Bf1 c5 18. g4 Bxe5 19. dxe5 Nxg4 20. Qxe7 Rxe7 21. h3 Nxe5 22. Rad1 Nf3+ 23. Kh1 Red7 24. Rxd7 Rxd7 25. Rc1 Rd2 26. Bc3 Rxf2 27. Bg2 Bxh3 28. Bxf3

[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. d4 c5 2. d5 Nf6 3. c4 e6 4. Nc3 exd5 5. cxd5 d6 6. g3 g6 7. Bg2 Bg7 8. Nf3 O-O 9. O-O a6 10. a4 Nbd7 11. Nd2 Rb8 12. Nc4 Ne8 13. e4 b5 14. axb5 axb5 15. Na5 Bb7 16. Nxb5 Ne5 17. Nc3 Qb6 18. f4 c4+ 19. Kh1 Nd3 20. Qe2 Ba6 21. Nc6 Rb7 22. Be3

[Assistant] Qxb2


[System] You are a 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 a6 3. a4 e6 4. f4 Nc6 5. Nf3 d5 6. exd5 exd5 7. d4 c4 8. g3 Bf5 9. Bg2 Nb4 10. O-O Bxc2 11. Re1+ Be7 12. Qe2 Nf6 13. Ng5 Bd3 14. Qe5 Nc2 15. Bxd5 O-O 16. Nxf7 Rxf7 17. Bxf7+

[Assistant] Kxf7


[System] You are a 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 c5 2. e3 e6 3. f3 d5 4. Ne2 Nf6 5. e4 Nc6 6. e5 Nxe5

[Assistant] c4


[System] You are a 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. g3 Nc6 3. Bg2 g6

[Assistant] 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] FEN: 3r4/6pk/5r1p/3p1q2/P1nQBP2/2P1P2P/5P2/R2R2K1 b - - 0 24

[Assistant] dxe4


[System] You are a 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. e3 d5 3. d4 Nd7 4. c4 dxc4 5. Nc3 g6 6. Bxc4

[Assistant] Bg7


[System] You are a 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. Nc3 a6 4. a4 Nc6 5. e3 e5 6. d5 Na5 7. Nf3 Bd6 8. Nd2 Nf6 9. Nxc4 Nxc4 10. Bxc4 e4 11. h3 Qe7 12. g4 h5

[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] FEN: 2q1r1k1/6bp/2nB2p1/p2pP1N1/3P2P1/7P/4Q3/2R3K1 b - - 6 33

[Assistant] Nxd4


[System] You are a 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: 4r1k1/4P3/pp3K2/8/7P/8/P4P2/8 w - - 0 48

[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. Nc3 d6 3. Nf3 g6 4. d3 Bg7 5. g3 Nc6 6. Bg2 Nf6 7. O-O O-O 8. h3 Rb8 9. d4 cxd4 10. Nxd4 Nxd4 11. Qxd4 a6 12. Qd3 Nd7 13. Be3 Nc5 14. Qd2 b5 15. Rad1 Qc7 16. Bd4 Bxd4 17. Qxd4 Be6 18. Nd5 Bxd5 19. exd5 Rfd8 20. Rfe1

[Assistant] Nd7


[System] You are a 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. h4 h5 4. Bc4 Bg7 5. d4 cxd4 6. Nxd4 Nc6 7. Nxc6 bxc6 8. Qf3 e6

[Assistant] Bg5


[System] You are a 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 a6 6. Be3 Nf6 7. Be2 Be7 8. O-O O-O 9. f3 Nc6

[Assistant] Qd2


[System] You are a 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 Nc6 3. Bg2 Bh3 4. d3 Bxg2 5. Rg1 Bxf3 6. exf3 g6 7. f4 Bg7 8. Nc3 Nf6 9. g4 e5 10. g5 Nh5 11. fxe5 Nxe5 12. f4 O-O 13. fxe5 Re8 14. Kf2 Bxe5 15. Bd2 Bd4+ 16. Kf1 Bxg1 17. Kxg1 Qe7 18. Qf3 Qe5 19. Rf1 Qc5+ 20. Rf2 Re7 21. Ne4 Qf5 22. Bc3 Qxf3 23. Rxf3 Ng7 24. Nf6+ Kh8 25. Ng4 f6 26. Nh6 Nf5 27. Nxf5 gxf5 28. Rxf5 Rf7 29. Rxf6 Rxf6 30. Bxf6+ Kg8 31. Kf2 Kf7 32. h4 h6 33. Kg3 hxg5 34. hxg5 Rg8 35. Kg4 Rg6 36. Kf5 c6 37. d4 d5 38. c3 b6 39. b3 Rg8 40. c4 Rh8 41. cxd5 Rh2 42. d6 Rf2+ 43. Ke5 Rd2 44. d7 Rxd4 45. Kxd4 c5+ 46. Kd5 b5 47. d8=Q Kg6 48. Qe7

[Assistant] Kf5


[System] You are a 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 d6 2. d4 g6 3. c4 Bg7 4. Nc3 Nf6 5. b3 O-O 6. Bb2 c5 7. Bd3 cxd4 8. exd4 Nc6 9. d5 Na5 10. Nge2 b6 11. O-O e6 12. Be4 Nxe4 13. Nxe4 Bxb2 14. Rb1 Bg7 15. dxe6 Bxe6 16. Nxd6 Be5 17. Nb5 Qxd1 18. Rbxd1 a6 19. Nbd4 Bg4 20. f3 Be6 21. Nxe6 fxe6 22. Rfe1 Rfd8 23. f4 Bf6 24. Kf2 Nc6 25. Kf3 Rxd1 26. Rxd1 Rd8 27. Rxd8+ Bxd8 28. Ke4 Kf7 29. a3 a5 30. Nc3

[Assistant] Bf6


[System] You are a 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: 2rr3k/1b4pp/pp3p2/2q1pNn1/8/6Q1/BPP2PPP/2RR2K1 w - - 8 27

[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] 1. e4 d5 2. exd5 c6 3. d4 cxd5 4. Bd3 Nc6 5. Nf3 Nf6 6. c3 Bg4 7. Qb3 Qb6 8. Ne5 Nxe5 9. dxe5 Nd7 10. Qxb6 Nxb6 11. Be3 e6 12. f4 Bf5 13. Bxf5 exf5 14. Nd2 Nc4 15. Nxc4

[Assistant] dxc4