[System] You are a chess 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. d4 c5 3. Bg5 cxd4 4. c3 dxc3 5. Nxc3 e6 6. e3 Be7 7. Bd3 O-O 8. Qe2 d6 9. h4 a6 10. e4 h6 11. Be3 Nbd7 12. Rd1 Qc7 13. Kf1 Ne5 14. g3 Nxf3 15. Qxf3 Nd7 16. Kg2 Ne5 17. Qe2 b5 18. f4 Nxd3 19. Rxd3 Bb7 20. Rhd1 f5 21. Kf2 fxe4 22. R3d2 d5 23. Bd4 Bf6

[Assistant] Qe3


[System] You are a chess 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. c4 Nf6 5. Nc3 dxc4

[Assistant] Nf3


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

[User] 1. d4 d6 2. c4 e5 3. Nf3 e4 4. Nfd2 Nf6 5. Nc3 Be7 6. Ndxe4 Nxe4 7. Nxe4 O-O 8. g3 d5 9. cxd5 Qxd5 10. Bg2 Bb4+ 11. Kf1 Qa5 12. a3

[Assistant] Be7


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

[User] 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bf5 7. Bd3 Bxd3 8. Qxd3 Bd6 9. Nf3 O-O 10. Be3 Re8 11. O-O-O Qc7 12. h4 Nd7 13. g4 Bf4 14. Kb1 Bxe3 15. fxe3 Qg3 16. e4 Qxg4 17. Rdg1 Qxe4 18. Qxe4 Rxe4 19. h5 Rae8 20. h6 g6 21. Nd2 Re2 22. Nc4 Kf8 23. Nd6 Rb8 24. c4 f5 25. c5 Nf6 26. Re1 Rd2 27. Re3 Rxd4 28. Rhe1 Ne4 29. Nxe4 fxe4 30. Rxe4 Rxe4 31. Rxe4 Re8 32. Rd4 f5 33. Rd7 Re7 34. Rd8+ Kf7 35. Rh8 Kf6 36. Kc2 f4 37. Kd3 Kg5 38. Rf8 Kg4 39. Rg8 f3 40. Rg7 Re5 41. Rxh7 f2

[Assistant] Rf7


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

[User] 1. e4 g6 2. Nc3 Bg7 3. f4 d6 4. Nf3 c5 5. Bc4 Nc6 6. d3 Nd4 7. O-O Bg4 8. h3 Bxf3 9. Rxf3 Nf6 10. Rf1 Qb6 11. a4 a6 12. f5 O-O 13. Bg5 Nc6 14. Bxf6

[Assistant] Bxf6


[System] You are a chess 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 c6 4. f4 d5 5. e5 Nh6 6. Nf3 O-O 7. Be3 Bg4 8. h3 Nf5 9. Bf2 Bxf3 10. Qxf3 e6 11. g4 Ne7 12. Ne2 c5 13. dxc5 Nbc6 14. c3 f6 15. exf6 Rxf6 16. Qe3 a5 17. Bg2 Qd7 18. O-O Raf8 19. Rad1 a4 20. b4 axb3 21. axb3 Na5 22. Nd4 Nec6 23. Bh4 Nxd4 24. cxd4 R6f7 25. Be1 Nc6 26. b4 Bh6 27. g5 Bg7

[Assistant] b5


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

[User] FEN: 7k/p5pp/2p2b2/7q/3pr3/1P2r1P1/PBP2R1P/4RQK1 w - - 0 31

[Assistant] Rxf6


[System] You are a chess 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 e6 4. O-O Be7 5. b3 O-O 6. Bb2 b6 7. d3 Bb7 8. Nbd2 c5 9. Re1 Nc6 10. e4 b5 11. e5 Ne8 12. d4 c4 13. c3 a5 14. a4 Qb6 15. axb5 Qxb5 16. bxc4 Qxb2 17. Rb1 Qxc3 18. cxd5 Nb4 19. d6 Bxd6 20. exd6 Nxd6 21. Rc1 Qd3 22. Re3 Qa6 23. Bf1 Qa7 24. Nc4 Nxc4

[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 Nf6 2. Nf3 e6 3. Bg5 h6 4. Bh4 c5 5. Nbd2 Qb6 6. e3 d5 7. b3 Nbd7 8. c3 a5 9. Bd3 g5 10. Bg3 Bg7 11. O-O O-O 12. Rb1 Re8 13. h3 Qc6 14. Ne5 Nxe5 15. Bxe5 b5 16. Bc2 Ba6 17. Re1 b4 18. cxb4 cxb4 19. Rc1 Qb5 20. Bb1 Rec8 21. Bxf6 Bxf6 22. Nf3 Rxc1 23. Qxc1 Rc8 24. Qd2 Rc3 25. Rc1 Qc6 26. Rd1 Qc7 27. g3 Kg7 28. Kg2 Be7 29. Ne5 f6 30. Nf3 Bd6 31. Re1 f5 32. Qd1 Bb7 33. Bd3 Bc6 34. Qd2 Be8 35. Rb1 Bh5 36. Nh2 Qc6 37. Rb2 Rc1 38. Rc2 Rxc2 39. Bxc2 Qc3 40. Qxc3 bxc3 41. f4 Kf6 42. Nf3 Bb4 43. Ne1 Be2 44. Kf2 Bb5 45. Nd3 Bd6 46. Nc1 h5 47. Ne2 h4 48. fxg5+

[Assistant] Kxg5


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

[User] 1. e4 Nc6 2. Nf3 d5 3. exd5 Qxd5 4. Nc3 Nf6 5. Nxd5 Nxd5 6. Bc4 Nb6 7. Bb3 e6 8. O-O Bd6 9. d4 Ne7 10. c4 c6 11. d5 Bc7 12. d6 Bd8 13. dxe7 Bxe7 14. Bg5

[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] FEN: 5rk1/q4ppp/2p1b3/1p1p4/3P1N1P/1BpQ1PP1/2P5/rNK1R1R1 b - - 1 24

[Assistant] Rxb1+


[System] You are a 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: 1R6/8/8/3k4/1pr1pP1p/4K2P/5P2/8 b - - 19 64

[Assistant] Rc3+


[System] You are a chess 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 Bf5 5. d3 h6 6. Nbd2 e6 7. c3 Nbd7 8. a4 Be7 9. b4 O-O 10. Qb3 Bh7 11. Bb2 Qc7 12. Rfc1 Rfc8 13. c4 Qd8 14. b5 Nc5 15. Qa2 a6 16. bxc6 bxc6 17. Ne5 Rab8 18. Ba3 Nfd7 19. Nxd7 Qxd7 20. Rab1 Rxb1 21. Rxb1 Bg6 22. a5 Qc7 23. Rb6 Ra8 24. Qb1 Bf8 25. Nb3 Na4 26. Bxf8 Kxf8 27. Nd4 Nxb6 28. axb6 Qb7 29. Qb4+ Kg8 30. c5 e5 31. Nb3 a5 32. Nxa5 Qd7 33. b7 Rb8 34. Qb6 f6 35. Bh3 Qe7 36. Nxc6 Qxb7 37. Nxb8 Qxb6 38. cxb6 Be8 39. Na6 Bc6 40. Bc8 Kf8 41. b7 Bxb7 42. Bxb7 Ke7 43. Bxd5 Kd6 44. Be4 g5 45. Nb4 Ke6 46. Kg2 f5 47. g4 fxe4 48. dxe4 Kf6 49. Kf3 Kg6 50. Nd5 h5 51. gxh5+ Kxh5 52. Kg3 g4 53. h3 Kg5 54. hxg4 Kg6 55. f4 Kh6 56. fxe5 Kg6 57. Kf4 Kf7 58. Kf5 Ke8 59. e6 Kf8 60. Kf6 Ke8 61. e7 Kd7 62. Kf7 Kd6 63. e8=Q Kc5 64. Nf6 Kd4 65. e5 Ke3 66. e6 Kf2 67. e7 Kg3 68. Ne4+ Kh4 69. Qh8+ Kxg4 70. Qf6 Kh3

[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 c6 2. Nf3 d5 3. exd5 cxd5 4. d4 Nc6 5. Bd3 Bg4 6. O-O e6 7. c3 Bd6 8. h3 Bh5 9. Be3 Nge7 10. a4 O-O 11. Nbd2 f6 12. Re1 e5 13. Bc2 e4 14. g4 Bf7 15. Nh2 f5 16. Nhf1 f4 17. Bxf4 Bxf4 18. Ne3 Ng6 19. Ng2 Be6 20. Nf1 Nh4 21. Nfe3 Nf3+ 22. Kf1 h5 23. Nxf4 Rxf4 24. Ng2 Rf8 25. Qc1 hxg4 26. hxg4 Bxg4 27. Re3 Bh3 28. Rxf3 exf3 29. Qe3 Bxg2+ 30. Ke1

[Assistant] Re8


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

[User] 1. d4 Nf6 2. c3 g6 3. Bg5 Bg7 4. Nd2 O-O 5. e4 h6 6. Bh4 d6 7. f3 e5 8. d5 Nbd7 9. Bd3 a5 10. Ne2 g5 11. Bf2 Nh5 12. g4 Nf4

[Assistant] Nxf4


[System] You are a chess 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 e6 3. e3 Bd6 4. Bg3 c5 5. c3 Qc7 6. Bxd6 Qxd6 7. f4 Ne7 8. Nd2 O-O 9. Bd3 b6 10. Ngf3 f6 11. O-O Ba6 12. Bxa6 Nxa6 13. a3 Nb8 14. b4 Nbc6 15. bxc5 bxc5 16. Qa4 Nf5 17. Rfe1 cxd4

[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] FEN: r3r2k/3bq3/2p2p1B/p2pb2Q/p3N2P/3P4/PPP3P1/5RK1 w - - 0 33

[Assistant] Nxf6


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

[User] FEN: r4rk1/2p2ppp/p2q1b2/8/B2p4/4Bb2/PP2QPPP/R2R2K1 w - - 0 19

[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: 8/1p3K1p/8/k4PPP/8/8/5r2/8 w - - 1 57

[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. Nf3 c5 2. g3 e6 3. Bg2 g6 4. O-O Bg7

[Assistant] d3


[System] You are a chess 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 d5 3. f4 Nf6 4. Nf3 c5 5. Bd3 Nc6 6. c3

[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] FEN: r1b1r1k1/1B2nqp1/p3p3/2N2pP1/3P1P1p/2P1Q2P/PP6/2KR3R b - - 0 22

[Assistant] Bxb7


[System] You are a chess 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. d3 Nd4 4. f4 d5 5. Nf3 dxe4 6. dxe4 Nxf3+ 7. Qxf3 Bd7 8. Be3 Bc6 9. Bc4 e6 10. f5 exf5 11. Qxf5 Nf6 12. e5 Be4 13. Nxe4 Be7 14. exf6 Bxf6 15. Nxf6+

[Assistant] Qxf6


[System] You are a chess 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. e3 d6 3. Nf3 Nd7 4. h3 g6 5. g3 Ngf6 6. Bg2 Bg7 7. O-O O-O 8. Nbd2 Re8

[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. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Bd6 6. O-O Nf6 7. Rfe1 h6 8. d4 O-O 9. Bd3 Rfe8 10. Nbd2 Bf8 11. d5 Nb8 12. c4 a5 13. Bb2 d6 14. c5 Nbd7 15. cxd6 cxd6 16. Rac1 Nc5 17. Bb1 Bg4 18. h3 Bd7 19. Nb3 b6 20. Nxc5 bxc5 21. Nd2 Bb5 22. Nc4 Nd7 23. Ne3 g6 24. Rc3 Nb6 25. Ng4 Na4 26. Rb3

[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. Nf3 d6 2. d4 g6 3. g3 Bg7 4. Bg2 Nd7

[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. e3 Nc6 2. d4 e5 3. c4 Nf6 4. d5 Ne7 5. Nc3 Ng6 6. Bd3 Bc5 7. Nf3 d6 8. Ne4 Nxe4 9. Bxe4 f5 10. Bc2 O-O 11. Nd2 f4 12. Nb3 Bb4+ 13. Bd2 Bxd2+ 14. Qxd2 fxe3 15. Qxe3 Qh4 16. O-O-O Qxc4 17. Kb1 Bf5 18. Rc1 Bxc2+ 19. Rxc2 Qf4 20. Rxc7 b6 21. Qxf4 Nxf4 22. g3 Nxd5 23. Rd7 Rad8 24. Rxd8 Rxd8 25. Rd1 Nf6

[Assistant] Nd2


[System] You are a 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: 3br1k1/pR3ppp/3p4/4rP2/3p4/3B4/PP3PPP/2R3K1 b - - 0 21

[Assistant] Re1+


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

[User] 1. d4 d5 2. Nc3 Nf6 3. Nf3 Nbd7 4. Bg5 e6 5. e4 dxe4 6. Nxe4 Be7 7. Bxf6 Nxf6 8. Bd3 O-O 9. Qe2 Bd7 10. O-O-O Bc6 11. h4 Nxe4 12. Bxe4 Bxe4 13. Qxe4 Qd5 14. Qxd5 exd5 15. c3 Rfe8 16. Kd2 Bf6 17. g3 g6 18. Ne1 Kg7 19. Nd3 h5 20. Rde1 b6 21. Rxe8 Rxe8 22. Nb4 Rd8 23. Nc6 Rd6 24. Nxa7 c5 25. Nb5 Rd8 26. Re1 Ra8 27. a3 Ra5 28. Nc7 Kh7 29. Nxd5 Bg7 30. Nxb6 cxd4 31. c4 Rf5 32. f4 d3 33. b4 Bd4 34. c5 Bf2 35. Rf1 Bxg3 36. Kxd3 Bxh4 37. a4 Bd8 38. a5 Rf6 39. Nd5 Rc6 40. Kc4 h4 41. b5 Rc8 42. b6 Kh6

[Assistant] b7


[System] You are a chess 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 d5 4. Be3 dxe4 5. Nxe4 Nf6 6. Nxf6+ exf6 7. Qd2 O-O 8. Bh6 Nc6 9. Bxg7 Kxg7 10. Nf3 Bg4 11. O-O-O Bxf3 12. gxf3 Qd5 13. Bg2 Qxa2 14. Qc3 Rad8 15. d5 Qa1+ 16. Kd2 Rxd5+ 17. Ke2 Qa6+ 18. Rd3 Re8+ 19. Kd2 Rde5 20. Bf1 Qb6 21. Re3 Rxe3 22. fxe3 Ne5 23. Be2 Rd8+ 24. Ke1 Qd6 25. Kf2 Qe6 26. Rd1 Rxd1 27. Bxd1 Qh3 28. Kg1 h5 29. f4 Nf3+ 30. Bxf3 Qxf3 31. Qd4

[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: r4rk1/p1p2p1p/1p4Pn/2p1P1Q1/2Bn4/2NP4/PPP2q2/2KR2R1 b - - 0 21

[Assistant] Qxc2#


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

[User] 1. f4 d5 2. Nf3 c5 3. g3 Nc6 4. Bg2 Nf6 5. Kf2 Bg4 6. Re1 Ne4+ 7. Kg1 Bxf3 8. Bxf3 Nf6 9. d4 e6 10. c3 cxd4 11. cxd4 Rc8 12. Nc3 Nxd4 13. Bg2 Bc5 14. e3 Nc6 15. Kh1 d4 16. exd4 Bxd4 17. Nb5 Bb6 18. Qxd8+ Rxd8 19. Be3 Bxe3 20. Rxe3 Ng4 21. Rb3 O-O 22. Bxc6 bxc6 23. Nxa7 Rd2 24. Nxc6 Rxh2+ 25. Kg1 h5

[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. Nf3 b5 2. e4 Bb7 3. Bxb5 Bxe4 4. Nc3 Bg6 5. d4 c6 6. Bd3 Nf6 7. O-O e6 8. Bg5 Be7 9. Ne5 d6 10. Nxg6 hxg6 11. Qe2 Nbd7 12. Rfe1 Rb8 13. b3 O-O 14. a4 Nd5 15. Nxd5 cxd5 16. Bxe7 Qxe7 17. a5 Rfc8 18. a6 Nf6 19. h4 Qc7 20. Ra4 Qc3 21. Rea1 Ne4 22. h5 gxh5 23. Qxh5 Qd2 24. Qf3 f5 25. Rd1 Qg5 26. Qe2 Kf7 27. Bxe4 dxe4 28. d5 e5 29. Rc4 Rh8 30. Rc7+ Kg6 31. Rd7 Rbd8 32. Rxd8 Rxd8 33. f3 e3 34. Re1 f4 35. Qd3+ Qf5 36. Qxf5+ Kxf5 37. g4+ Kf6 38. Re2

[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. Nf3 Nf6 2. g3 d6 3. Bg2 c6 4. d4 g6 5. O-O Bg7 6. c4 O-O 7. Nc3 Nbd7 8. h3 Qc7 9. Be3 b6 10. Qb3 Bb7 11. Rac1 Rad8

[Assistant] Rfd1


[System] You are a chess 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 e6 3. Nf3 Nf6 4. e3 Bb4+ 5. Nc3 O-O 6. Bd3 c5 7. O-O cxd4 8. Nxd4 e5 9. Nc2 Bxc3 10. bxc3 e4 11. Be2 Be6 12. Nd4 Nc6 13. Ba3 Re8 14. Rb1 Qd7 15. c5 Ne5 16. Bb5 Nc6 17. Qa4 Rec8 18. Rb2 Bh3 19. Bxc6 Qg4 20. f3 exf3 21. Nxf3 bxc6 22. Qxg4 Bxg4 23. Rb7 Ne4 24. Ne5 f5 25. Nxg4 fxg4 26. Rff7 Rab8 27. Rxg7+ Kf8 28. Rgf7+

[Assistant] Kg8


[System] You are a 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/pppq1ppp/5b2/1P2p2b/2Pn4/P2P1N1P/3BBPP1/R2Q1RK1 w - - 1 15

[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: r4rk1/1b1pnp1p/p3p1p1/1p6/4q3/P1P1BQ1P/B1P2PP1/R2R2K1 w - - 0 18

[Assistant] Rxd7


[System] You are a 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/ppq2k2/5p2/3R2r1/6P1/2P2Q2/P4PR1/5K2 b - - 6 31

[Assistant] Qc4+


[System] You are a chess 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

[Assistant] dxe5


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

[User] 1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Bb5+ Bd7 6. Bc4 b5

[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: 8/8/4B1pk/4Q2p/1P2P3/6K1/3q2PP/8 b - - 8 50

[Assistant] Qe3+


[System] You are a 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: 4r1k1/5pp1/2pb1q1p/p2p4/3P4/P2Q3P/1PB2PP1/R5K1 w - - 0 26

[Assistant] Qh7+


[System] You are a chess 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. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 a6 7. Bd3 b5 8. c3 Bb7 9. Qe2 Nd7 10. Be4 c6 11. Bc2 Qe7 12. Bf4 Bg7 13. Bg3 O-O 14. O-O f5 15. Rae1 Rfe8 16. Bf4

[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: 4k3/3R4/5K2/1p4p1/2p5/2P1bbP1/1P6/8 w - - 18 46

[Assistant] Re7+


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

[User] 1. Nf3 Nf6 2. e3 g6 3. Be2 Bg7 4. O-O O-O 5. d4 d5 6. b3 Ne4 7. Bb2 c5 8. c4 cxd4 9. Bxd4 dxc4 10. Bxc4 Nc6 11. Bxg7 Qxd1 12. Rxd1 Kxg7 13. Bd5 Nf6 14. Bxc6 bxc6 15. Nc3 Bg4 16. Na4 Nd5 17. Rac1 Nb4 18. Rd4 Bxf3 19. gxf3 a5 20. a3 Na6 21. Rxc6 Rfb8 22. Rd3 Rb5 23. Kg2 h5 24. f4 Nb8 25. Rc7 e6 26. Nc5

[Assistant] Na6


[System] You are a 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/R1P3p1/7p/1N2k3/5n2/1P6/P5PP/6K1 b - - 2 32

[Assistant] Ne2+


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

[User] 1. e4 Nf6 2. e5 Nd5 3. Nf3 Nb6 4. Nc3 d6 5. exd6 cxd6 6. d4 g6 7. Bd3 Bg7 8. O-O O-O 9. h3 Nc6 10. Be3 e5 11. dxe5

[Assistant] dxe5


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

[User] FEN: 4k3/3q1p1b/5Br1/8/1Q2P1P1/4KP2/8/8 w - - 3 39

[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 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 d5 5. exd5 Qxd5 6. Nf3 Bg4 7. Be2 e6 8. Nc3 Qd7 9. h3 Bh5 10. d5 exd5 11. Qxd5 Qxd5 12. Nxd5 O-O-O 13. Nc3 Bb4 14. Bd2 Nf6 15. Rc1 Rhe8 16. Kf1 Bxf3

[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: r1bqk2r/ppp3pp/4p3/3pb3/4p3/2P1P3/PP1NQPPP/R1B1K2R w KQkq - 0 11

[Assistant] Qh5+


[System] You are a chess 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. Nf3 Nbd7 5. Bc4 exd4 6. Nxd4 Nb6 7. Be2 Be7 8. O-O c6 9. f4 O-O 10. Bf3

[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. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 g6 5. c4 Bg7 6. Nf3 Nc6 7. h3 d6 8. O-O Nf6 9. Nc3 O-O 10. Be3 Bd7 11. Rc1 a6 12. Bb1 Rc8 13. Qe2 Qa5 14. a3 Ne5 15. Nd2 Be6 16. Nd5 Bxd5 17. exd5 b5 18. cxb5 Qxb5 19. Qxb5 axb5 20. Ba2 Nd3 21. Rxc8 Rxc8 22. Rb1 Nc1 23. Bb3 Nxb3 24. Nxb3 Nxd5 25. Bd4 e5 26. Be3 Nxe3 27. fxe3 Rc2 28. Na5 e4 29. b3

[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] FEN: 2kr4/pp3p2/2q3b1/1Nb1Q1p1/2P1n3/4P1Pr/P3B1P1/2R2RK1 w - - 0 23

[Assistant] gxh3


[System] You are a chess 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. c4 Bb7 3. d4 g6 4. e4 Bg7 5. Nc3 e6 6. Be2 d6 7. O-O Ne7 8. Be3 O-O 9. Nd2 c5

[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] FEN: 8/1b1n4/p1q2Qpk/1p3p1p/4p3/1P5P/P4PP1/3B2K1 w - - 2 43

[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] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 h6 10. h3 Re8 11. Be3 Bf8 12. Nbd2 Bb7 13. a4 exd4 14. cxd4 Nxe4 15. Nxe4

[Assistant] Rxe4


[System] You are a chess 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 Nf6 4. e4 O-O 5. f3 d6 6. Be3 Nbd7 7. Qd2 c6 8. Nge2 e5 9. g4 h5 10. gxh5 Nxh5 11. O-O-O exd4 12. Bxd4 Ne5 13. Bg2

[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: r4rk1/1b4pp/p7/3q1p2/1P6/P1Q4P/2B3P1/R4RK1 w - - 0 28

[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: 3r2k1/1B2p2p/p5p1/8/P4B2/2q3PP/1p2QP2/6K1 w - - 0 28

[Assistant] Qe6+


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

[User] FEN: r4r2/p1p2ppk/3q3N/3P4/4PQ2/7P/5P1K/6R1 w - - 1 33

[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] FEN: 6k1/p4p2/3B3p/4P1p1/6Q1/P4q1P/1Pr4P/R5K1 b - - 2 26

[Assistant] Qf2+


[System] You are a chess 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 exd4 3. c3 dxc3 4. Nxc3 Nf6 5. Bg5 d5 6. e3 Be7 7. Bd3 c6 8. O-O 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] FEN: 8/8/3k2K1/1p3p1p/1Pn4P/3B2P1/5P2/8 b - - 0 44

[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] FEN: rn2k2r/pp2bqpp/2p1Qn2/8/8/6N1/PPPP1PPP/R1B1R1K1 w kq - 3 14

[Assistant] Qc8#


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

[User] 1. e4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. Nxe5 Nxe5 5. d4 Nc6 6. d5 Bb4 7. dxc6 bxc6 8. Bd3 O-O 9. O-O d5 10. Bg5 d4 11. Ne2 Be7 12. e5 Nd5 13. Bxe7 Qxe7 14. Nxd4 Rb8

[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. d4 c6 2. Nc3 d5 3. e4 dxe4 4. f3 exf3 5. Nxf3 e6 6. Bd3 Ne7 7. O-O Ng6 8. Qe1 Be7 9. Qg3 Bf6 10. Be3 Nd7 11. Rad1 b6 12. Ne5 Ndxe5 13. dxe5 Bxe5

[Assistant] Bxg6


[System] You are a 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/1pp2ppp/p2b4/3p4/3N1Pb1/1P1qP1Q1/PB4PP/R3K1NR b KQkq - 1 14

[Assistant] Bb4+


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

[User] FEN: 8/r7/1p2Rnp1/3p1k1p/3P4/4P1P1/6KN/8 w - - 0 42

[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. Nc3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e3 O-O 5. Nge2 d6 6. d4 Nbd7 7. g3 c5 8. Bg2 cxd4 9. Nxd4 e5 10. Nde2 Rb8 11. O-O Qe7 12. Rc1 Nc5 13. Nd5 Nxd5 14. Bxd5 b6 15. Bg2 Bb7 16. Bxb7 Rxb7 17. c4 Rd7 18. Nc3 Rfd8 19. Nd5 Qe6 20. f3 Qh3 21. e4 f5 22. Qe2 fxe4 23. fxe4 Bh6 24. Rce1 Rf8

[Assistant] Nf6+


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

[User] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 d6 5. Nc3 g6 6. Be3 Bg7 7. Qd2 Nf6 8. f3 O-O 9. Bc4 Na5 10. Bb3 a6 11. h4

[Assistant] h5


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

[User] 1. e4 d6 2. Nc3 Nf6 3. f4 c5 4. Nf3 Nc6 5. Bc4 g6 6. d3 Bg7 7. a3 O-O 8. Ba2 a6 9. O-O b5 10. Qe1 Bb7 11. Qh4 Rac8 12. f5

[Assistant] b4


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

[User] 1. e4 e6 2. Nc3 d6 3. d4 Be7 4. f3 a6 5. f4 b5 6. Nf3 b4 7. Bd3 bxc3 8. bxc3 Bb7 9. O-O Nf6 10. e5 Nd5 11. c4 Nb4 12. Be2 N4c6 13. c3 dxe5 14. fxe5 Nd7 15. Bf4 Nb6 16. Qd2 Na5 17. d5 Naxc4 18. Bxc4 Nxc4 19. Qd4 Qxd5 20. Rad1 Bc5 21. Kh1 Bxd4 22. cxd4 O-O-O 23. Rc1 h6 24. Rc3 g5 25. Be3 Nxe3 26. Rxe3 g4 27. Rf2 gxf3 28. Rexf3 Rhg8 29. Rxf7 Rxg2

[Assistant] R7f3


[System] You are a chess 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 b6 3. Bg2 Bb7 4. O-O e6 5. c4 Nf6 6. Nc3 a6 7. Qc2 d6 8. e4 Be7 9. d4 cxd4 10. Nxd4 Qc7 11. b3 Nbd7 12. h3 O-O 13. Be3 Rfe8 14. Rac1 Rac8 15. Rfd1 Qb8 16. Qb1 Ne5 17. Na4 Ba8 18. f4 Ned7 19. g4 g6 20. Nc3 Bf8 21. Nf3 Nc5 22. e5 Bxf3 23. Bxf3 dxe5 24. fxe5 Qxe5 25. Re1 Qg3+

[Assistant] Bg2


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

[User] FEN: r4rk1/p2n2p1/1p1Np2p/2p2p2/3P1P2/3BPbq1/PPP2R2/R2QK3 w Q - 2 20

[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: r1b2k2/pp2p3/2p5/7Q/2P5/2P3q1/P7/R3RK2 b - - 1 28

[Assistant] Bh3+


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

[User] 1. e3 g6 2. d4 Bg7 3. Nf3 Nf6 4. Bd3 c5 5. Nbd2 cxd4 6. h4 d5 7. exd4 Nc6 8. Nb3 h5 9. c3

[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] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 cxd4 6. cxd4 f6 7. Bd3 fxe5 8. Nxe5 Nf6 9. O-O Bd6 10. f4 O-O 11. Kh1 Bd7 12. Be3 Qc7 13. Nc3 a6 14. Rc1 Rae8 15. a3 Bc8 16. b4 Qb6 17. Na4 Qa7 18. Nc5 g6 19. Qe1

[Assistant] Ne7


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

[User] 1. e4 d5 2. exd5 Nf6 3. d4 c6 4. c4 Bg4 5. Qb3 cxd5 6. Qxb7 e5 7. Qxa8

[Assistant] Bb4+


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

[User] 1. Nf3 Nf6 2. d3 g6 3. Nbd2 Bg7 4. c3 d6 5. Qc2 O-O 6. h3 c5

[Assistant] e4


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

[User] 1. d4 e6 2. Be3 d5 3. Nd2 Nf6 4. Bf4 c5 5. e3 cxd4 6. exd4 Nc6 7. c3 Bd6 8. Bxd6 Qxd6 9. Ngf3 O-O 10. Bd3 Re8 11. O-O e5 12. dxe5 Nxe5 13. Nxe5 Rxe5 14. Nf3 Rh5 15. Re1 Bg4 16. h3 Be6 17. Nd4 Rh6 18. Qf3 Re8 19. Re2 Nd7 20. Rae1 Nc5 21. Bf5 Rf6 22. Qg4 g6 23. Bxe6 Nxe6 24. Re5 Re7 25. h4 Kg7 26. Nf5+ Rxf5

[Assistant] Rxf5


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

[User] FEN: 6k1/4rrp1/p3Q3/2ppB3/4q3/2P3RP/P5PK/8 w - - 6 39

[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] FEN: 4rr2/ppp3pk/3bnqb1/3pp1p1/6PP/3PB3/PPP1QP2/R3K1NR w KQ - 0 20

[Assistant] hxg5+


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

[User] FEN: 7r/5Pk1/p2pB3/1p1P4/2p5/3np1Pp/Pq2Q2P/R6K w - - 0 32

[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: r1b1qrk1/pp4p1/4pbp1/3N4/6Q1/P7/1P3PPP/R1B1R1K1 b - - 0 16

[Assistant] exd5


[System] You are a 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: 2n1k3/2B5/1p6/2p1pp2/2P1P3/3K4/2P5/8 w - - 0 43

[Assistant] exf5


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

[User] FEN: r1b3k1/p1q1nppp/8/2pr4/8/P1BB4/1P3PPP/R2Q1RK1 b - - 1 18

[Assistant] Bf5


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 Nc6 4. Nf3 g6 5. d5 Nb8 6. Bg5 Bg7 7. Qd2 O-O 8. O-O-O e5 9. h4 Bg4 10. Be2 h5 11. Ng1 Bxe2 12. Ngxe2 Nbd7 13. g4 Qe8 14. gxh5 Nxh5 15. Ng3 Nf4

[Assistant] h5


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

[User] FEN: 8/7k/5K2/6P1/8/8/2n5/8 w - - 1 70

[Assistant] Kf7


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

[User] 1. Nf3 Nf6 2. g3 d5 3. Bg2 Nc6 4. O-O e5 5. d3 Be7 6. Nbd2 O-O 7. e4 dxe4 8. dxe4 Be6 9. Re1 a5 10. c3 a4 11. Qc2 Bc5 12. a3 Qd6 13. Nf1 Na5 14. Be3 Bxe3 15. Nxe3 Nc4 16. Rad1 Nxe3 17. Rxe3 Bb3 18. Rxd6 Bxc2 19. Rd2 Bxe4 20. Nxe5 Bxg2 21. Kxg2 Rfd8 22. Rde2 h6 23. Nc4 Rab8 24. Nd2 b5 25. Nf3 Nd5 26. Rd3 Nf4+ 27. gxf4 Rxd3

[Assistant] Re7


[System] You are a chess 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 h5 2. Bg2 h4 3. Nf3 h3 4. Bf1 e6 5. c4 d5 6. Nc3 c6 7. cxd5 exd5 8. d4 Nf6 9. Bg5 Be7 10. Qd2 Bg4 11. Bxf6 Bxf6 12. O-O-O Nd7 13. Ne5

[Assistant] Nxe5


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

[User] FEN: rn1qkb1r/ppp2ppp/5n2/4p3/2B5/1Q2Pb2/PP1P1PPP/RNB2RK1 w kq - 0 7

[Assistant] Bxf7+


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

[User] 1. e4 d5 2. exd5 Nf6 3. c4 c6 4. d4 cxd5 5. c5 e6 6. Nf3 Nc6 7. Nc3 Be7 8. Bb5 a6 9. Bxc6+ bxc6 10. O-O Qc7 11. Re1 O-O 12. Ne5 Nd7 13. Bf4 f5 14. Ng6 Qd8 15. Nxe7+ Qxe7 16. Bd6 Qf6 17. Bxf8 Nxf8 18. Qe2 Ra7 19. b4 Rf7 20. Qe5 Qg6 21. a4 f4 22. f3 Rf5 23. Qc7 Rg5 24. Re2 Qe8 25. b5 e5 26. Qxc6

[Assistant] Bd7


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

[User] FEN: 8/5kp1/1pp4p/p2p4/P2P1PKP/1PP3P1/2Q5/7q b - - 2 34

[Assistant] h5+


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

[User] FEN: 6k1/5p2/4qP1p/4B2P/5Q1K/3r2p1/1P4P1/8 w - - 0 49

[Assistant] Qxh6


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

[User] FEN: 3r2k1/p1r1pp2/1p4q1/3P1QPp/1P6/PB5P/KP6/7R w - - 1 33

[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] 1. e4 c6 2. Nf3 d5 3. exd5 cxd5 4. Ne5 Nf6 5. Bb5+ Bd7 6. Nxd7 Nbxd7 7. d4 a6 8. Bd3 e6 9. O-O Bd6 10. f4 O-O 11. c3 Qb6

[Assistant] Nd2


[System] You are a 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: r1b2rk1/3pnppp/p1p1p3/4P3/3q4/PPNB4/2P2PPP/R2Q1RK1 w - - 1 14

[Assistant] Bxh7+


[System] You are a chess 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 c6 3. exd5 cxd5 4. d4 Nf6 5. Bb5+ Bd7 6. Be2 e6 7. Nf3 Be7 8. O-O O-O 9. Re1 Ne4 10. Bf4 f5 11. Ne5 Nc6 12. f3 Nxe5 13. Bxe5 Nf6 14. Bd3 Bc6 15. Kh1 a6 16. Bg3 b5 17. Rxe6 Qd7 18. Qe2 Rfe8 19. Bxf5 Qd8 20. Re1 Bf8 21. a3 b4 22. axb4 Kh8 23. Bh4 Rxe6 24. Qxe6 Bd7 25. Bxf6 Bxe6 26. Bxd8 Rxd8 27. Bxe6 Bxb4 28. Re5 Bf8 29. Bxd5 a5 30. g3 a4 31. Nxa4 Bd6 32. Re6 Rf8 33. Nc3 h6 34. f4 Bc7 35. Re7 Bb8 36. Rf7 Rc8 37. f5

[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: 8/8/1pp5/1p6/P1PP2k1/8/7K/8 w - - 0 41

[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. b3 Nf6 2. Bb2 e6 3. e3 d5 4. Nf3 c5 5. c4 Nc6 6. a3 d4 7. exd4 cxd4 8. b4 e5 9. b5 e4 10. bxc6 exf3 11. Qxf3 bxc6 12. Bd3 c5

[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 Nf6 2. Nf3 b6 3. Bf4 Bb7 4. e3 e6 5. Be2 d5 6. h3 Bd6 7. Bxd6 Qxd6 8. O-O Nbd7 9. c4 c5 10. Nc3 cxd4 11. Nxd4 dxc4 12. Ndb5 Qb8 13. Nd6+ Ke7 14. Nxb7 Qxb7 15. Bf3 Qc7 16. Bxa8 Rxa8 17. Rc1 a6 18. b3 cxb3 19. Nd5+ Nxd5 20. Rxc7 Nxc7 21. Qxb3 b5 22. Rd1 Nd5 23. e4 N5f6 24. Qb4+ Ke8 25. Qd6 Rc8

[Assistant] Qxa6


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

[User] 1. d4 Nf6 2. c4 d6 3. Nf3 Bf5 4. g3 g6 5. Bg2 Bg7 6. Nc3 Ne4 7. Nxe4 Bxe4 8. O-O O-O 9. Be3 c5 10. Qb3 b6 11. Rad1 Nd7 12. d5 a6 13. a4 Rb8 14. Nd2 Bxg2 15. Kxg2 Ne5 16. Bf4 Qd7 17. Bxe5 Bxe5 18. e4 b5 19. axb5 axb5 20. Qd3 bxc4 21. Nxc4 Bd4 22. Rd2 Rb4 23. Rc1 Ra8 24. h3 Qb5 25. Qe2 Ra2 26. Rcc2 Rb3 27. h4 Kg7 28. h5 Ra4 29. g4 Rbb4 30. Ne3 Qxe2 31. Rxe2 Ra2 32. Nd1 Rb3 33. Red2 e5 34. f3 f6 35. Re2 Kf7 36. Red2 Ra4 37. Re2 Rab4 38. Red2 Be3 39. Nxe3 Rxe3 40. Kf2 Reb3 41. Kg2 f5 42. Rf2 Kf6 43. Rfe2 Kg5 44. Rf2 Kf4 45. hxg6 hxg6 46. gxf5 gxf5 47. exf5 Kxf5 48. Rfe2 Rd4 49. Kf2 Rxd5 50. Re3 Rb4 51. Rec3 Rbd4 52. Ke3 Rd1 53. Rh2

[Assistant] Kg5


[System] You are a chess 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 e5 2. Bg2 d5 3. d4 Nc6 4. dxe5 Nxe5 5. Qxd5 Qxd5 6. Bxd5 Nf6 7. Bg2 Bc5 8. Nf3 Nxf3+ 9. Bxf3 O-O 10. O-O Re8 11. Nc3 Bh3 12. Bg2 Bxg2 13. Kxg2 Bd4 14. e3 Bxc3 15. bxc3 Ne4 16. c4 Rad8 17. Rb1 b6 18. Kf3 f5 19. Rb3 Nd2+ 20. Bxd2 Rxd2 21. Rc1 Red8 22. c5 Kf7 23. cxb6 axb6 24. Rc3 c5 25. a4 R8d6 26. a5 R2d5 27. axb6 Rxb6 28. Ra1 Rb7 29. Ra5 Rc7 30. Rc4 g6 31. Kf4 Kf6 32. h4 h6 33. Kf3 g5 34. hxg5+ hxg5 35. c3 Ke5 36. Ke2 Rc6 37. f3 g4 38. fxg4 fxg4 39. Rxg4 Rf6

[Assistant] Rg5+


[System] You are a chess 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. c4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 O-O 6. Nf3 d6 7. O-O Nc6 8. d5 Ne5 9. Nxe5 dxe5 10. e4 f4 11. gxf4 exf4 12. Bxf4 Nxe4 13. Nxe4 Rxf4 14. Qd2 Bh6 15. Qc2 Bf5

[Assistant] Rae1


[System] You are a chess 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 Be7 3. Bf4 h6 4. Bg3 g5 5. e3 d6 6. h3 Nd7 7. Bd3 f5 8. c3 Ngf6 9. Qc2 g4 10. hxg4 Nxg4 11. Nh2 Ndf6 12. Nxg4 Nxg4 13. Be2 h5 14. Bxg4 fxg4 15. Qg6+ Kd7 16. Rxh5 Rxh5 17. Qxh5 Qg8 18. Nd2 b6 19. Ne4 Bb7 20. Bh4 Re8 21. Bxe7 Kxe7 22. Qh4+ Kf8 23. Nf6 Qf7 24. Qh8+ Ke7 25. Qxe8+ Qxe8 26. Nxe8 Kxe8

[Assistant] Ke2


[System] You are a chess 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 Bg4 3. Ne5 Bf5 4. c4 f6 5. Nf3 d4 6. Qb3 e5 7. Qxb7 Nd7 8. Bg2 Rb8 9. Qa6 Nc5 10. Qa5 Bd6 11. d3 Ne7 12. O-O Nc6 13. Qe1 O-O 14. Nbd2 a5 15. Qd1 a4 16. Nh4 Bd7 17. Qc2

[Assistant] Nb4


[System] You are a chess 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. e3 Nf6 3. Be2 e6 4. Nf3 Be7 5. O-O O-O 6. b3 b6 7. Bb2 Bb7 8. Nbd2 Nbd7 9. c4 c5 10. Rc1 Rc8 11. Re1 Qc7 12. Bd3 Qb8 13. Qe2 Rfd8 14. Ne5 Nxe5 15. dxe5 Nd7 16. f4 dxc4 17. Nxc4 f6 18. Qh5 f5 19. Be2 g6 20. Qh3 a6 21. Bf3 Bxf3 22. Qxf3 b5 23. Na5 Qb6 24. Nb7 Re8 25. Red1 Rc7 26. Nd6 Rd8 27. b4 c4 28. Bd4 Qb8 29. a3 Nb6 30. Bc5

[Assistant] Na4


[System] You are a chess 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 Nc6 4. d3 e5 5. g3 f5 6. Bg2 Nf6 7. exf5 Bxf5 8. f4 Qd7 9. fxe5 Nxe5 10. Nf3 Nxf3+ 11. Bxf3 Bh3 12. Bf4 Bb4+ 13. Bd2 Bd6 14. Bf4 O-O 15. Qd2 Rfe8 16. O-O-O b5 17. Bxa8 Rxa8 18. Bxd6 Qxd6 19. Nf4 Bg4 20. Rde1

[Assistant] c5


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

[User] FEN: r1bq1r1k/4nppp/p2p4/1p2p1B1/1b2P3/1BN5/PP3PPP/R2Q1RK1 w - - 0 15

[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] 1. e4 c5 2. Nc3 Nc6 3. d4 cxd4 4. Nce2 d3 5. cxd3 e6 6. g3 Qc7 7. Bg2 a6 8. Nf3 Bd6 9. O-O Nf6 10. d4 Be7 11. e5 Nd5 12. Nf4 Nxf4 13. Bxf4 h5 14. d5 Nxe5 15. Bxe5 Bd6 16. dxe6 Bxe5 17. Nxe5 Kf8 18. Nxf7 dxe6 19. Nxh8 Kg8 20. Ng6 Qf7 21. Ne5 Qf6 22. f4 b6 23. Qb3 Rb8 24. Rac1 Bb7 25. Bxb7 Rxb7 26. Rc8+ Kh7 27. Qd3+ Qf5 28. Qd8 Qf8

[Assistant] Qxf8


[System] You are a 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/p1q2pp1/1r2b2p/8/4PP2/b1pQ2P1/1P4BP/1RB4K w - - 0 29

[Assistant] bxa3


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

[User] 1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3 Bg7 5. g3 f5 6. Bg2 d5 7. Ne2 c6 8. O-O O-O 9. Nd2 b6 10. c4 Ba6 11. cxd5 cxd5 12. Re1 Bxe2 13. Qxe2 Nd7 14. Qb5 Nf6 15. Rac1 Rc8 16. Nf3 Qd6 17. Ne5 Ne4 18. Nc6 h5 19. Nxa7 Rxc1 20. Rxc1 h4 21. Qc6 Qb8 22. Nb5 hxg3 23. hxg3 Nxg3 24. fxg3 Qxg3 25. Rc3

[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. d3 c6 2. c3 d5 3. b3 e5 4. Bb2 Nf6 5. Na3 Bd6 6. Nc2 O-O 7. e3 e4 8. Qe2 exd3 9. Qxd3 Re8 10. f3 Nbd7 11. g3 Ne5 12. Qe2 Qb6 13. Bg2 a5 14. Nh3 a4 15. b4 a3 16. Bxa3 Nc4 17. Bc1 Bf5

[Assistant] Nd4


[System] You are a chess 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 a6 4. Qd3 Nf6 5. e5 Ng8 6. h4 e6 7. Bg5 Qb6 8. O-O-O Nd7 9. Kb1 c5 10. Na4 Qc7 11. dxc5 Nxc5 12. Nxc5 Bxc5 13. Qg3 Bd7 14. Nf3 h6 15. Be3 g6 16. Bxc5 Qxc5 17. h5 g5 18. Nd4 Ne7 19. f4 Rg8 20. Qf2 Nc6 21. fxg5 Nxd4 22. Rxd4 Rxg5

[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. Nf3 g5 2. Nxg5 e5 3. Nf3 e4 4. Ng1 Nf6 5. d3 Qe7 6. dxe4 Nxe4 7. Nd2 d5 8. Ngf3 c6 9. Nxe4 dxe4 10. Qd4 Rg8 11. Nd2

[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: 2N3k1/7p/p5pQ/1pPb4/1P3p2/P2np3/1q5P/5RK1 w - - 1 38

[Assistant] Ne7+


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

[User] 1. c3 d6 2. d4 Nf6 3. g3 g6 4. Bg2 Bg7 5. Nf3 O-O 6. O-O c6 7. Nbd2 Qc7 8. e4 Nbd7 9. Re1 e5 10. Nc4 Re8 11. d5 b5 12. dxc6 Qxc6 13. Na5 Qb6 14. Nb3 Bb7 15. Be3 Qc7 16. Nfd2 Rad8 17. Rc1 Nc5 18. Nxc5 dxc5 19. c4 b4 20. Qe2 a5 21. f4 exf4 22. Bxf4

[Assistant] Rxd2


[System] You are a chess 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. Nc3 d6 3. d4 g6 4. e4 Bg7 5. h4 Nf6 6. Be2 O-O 7. Ng5 Bg4 8. Bxg4 h6 9. Nh3 h5 10. Be2 Qb6 11. Rb1 Nbd7 12. Be3 Qa5 13. Ng5 Qc7 14. O-O

[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. d3 c6 2. Nd2 d5 3. Ngf3 d4 4. g3 Nf6 5. Bg2 g6 6. O-O Bg7 7. e4 dxe3 8. fxe3 O-O 9. e4 Nbd7 10. Qe2 e5 11. Kh1 Qb6 12. c3 Rd8 13. Nc4 Qc7 14. Bg5 b6 15. Nh4 Ba6 16. Ne3 h6 17. Bxf6 Nxf6 18. Rad1 c5 19. c4 Rd6 20. Nd5 Nxd5 21. exd5 Re8 22. Be4 f5 23. Bg2 Rd7 24. Qf3 Rd6 25. Rde1 Bf6 26. Nxg6 Bg5 27. Qh5 Qf7 28. Nf4 Bxf4 29. Qxf7+ Kxf7 30. gxf4 exf4 31. Rxe8

[Assistant] Kxe8


[System] You are a chess 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. d4 Nxd5 4. Nf3 c6 5. c4 Nb6 6. Nc3 Bg4 7. Be2

[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: 2krr3/1p2b1p1/p1n1b2p/2pq1p2/P1B2B1P/2P1Q3/1P1N1PP1/1R2K2R b K - 5 21

[Assistant] Qxd2+


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

[User] FEN: 2k5/2p2R2/1pP5/4N3/1p4K1/8/3r1b1P/8 w - - 1 41

[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: 8/p5p1/1p5p/3k4/1P1p1P2/P2K3P/6P1/8 b - - 0 34

[Assistant] h5


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

[User] 1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 c5 5. O-O Nc6 6. e3 Bd6 7. b3 O-O 8. Bb2 Re8 9. Nc3 d4 10. exd4 cxd4 11. Nb5 e5 12. Re1 Bb8 13. Na3 Bg4 14. d3 Qd7 15. Nc2 a6 16. b4 Ba7 17. a4 Rac8 18. b5 Nb8 19. Qd2 Qf5 20. Nh4 Qh5 21. h3 Bd7 22. Nf3 Bxh3 23. Bxh3 Qxh3 24. Nxe5 Nbd7 25. Nxd7 Qxd7 26. Rxe8+ Rxe8 27. Re1 Rd8 28. Qf4 axb5 29. axb5 Bb8 30. Qxd4 h6 31. Qxd7 Rxd7 32. Bxf6 gxf6 33. d4 Kg7 34. Rd1 Bc7 35. Kf1 b6 36. Ke2 Bd6 37. Kd3 h5 38. Ne3 Be5 39. Ke4 Bb8 40. Nd5 Kg6 41. Nxb6 f5+ 42. Kd3 Re7 43. Nd5 Bxg3 44. Nxe7+ Kf6 45. fxg3 Kxe7 46. Rf1 Ke6 47. Rf4 h4 48. Rxh4 f6 49. Rf4 Kd7 50. b6 Kc6 51. b7 Kxb7 52. Rxf5 Kc6 53. Rxf6+ Kd7 54. Rf5 Ke6

[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: 8/ppp3k1/3p2p1/5qN1/3P1n1Q/2P5/PP3P2/6K1 w - - 5 35

[Assistant] Qxf4


[System] You are a chess 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 Nf6 3. Bg2 b6 4. O-O Bb7 5. d3 Nbd7 6. c3 e5 7. Nbd2 Bd6 8. Re1 O-O 9. e4 dxe4 10. dxe4 Bc5 11. Nh4 g6 12. Nc4 b5 13. Ne3 c6

[Assistant] Ng4


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

[User] 1. d4 c6 2. Nf3 d5 3. Bf4 e6 4. e3 Bd6 5. Bxd6 Qxd6 6. c4 Nd7 7. Nc3 Ngf6 8. Be2 O-O 9. O-O Re8 10. Rc1 dxc4 11. Bxc4 Qe7 12. Qe2 e5 13. d5 Nb6 14. Bb3 cxd5 15. Rfd1 Bg4 16. h3

[Assistant] Bh5


[System] You are a 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/4q2p/p2p4/1ppPnpQ1/4N3/3P3P/PP4P1/3R2K1 b - - 1 28

[Assistant] Nf3+


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

[User] FEN: 6r1/p6k/2p5/2N5/2b5/6R1/PP2r3/2KR4 w - - 1 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: 8/8/4n3/p6P/P1N5/4kpK1/8/8 b - - 3 55

[Assistant] Ke2


[System] You are a chess 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. Bc4 Be7 5. d3 Nf6 6. Bb3 O-O 7. h3 d6 8. O-O h6 9. Nh2 Be6 10. f4 exf4 11. Bxf4 Ne5 12. Bxe5 dxe5 13. Nf3 Nd7 14. Bxe6 fxe6 15. Qe2 a6 16. Rf2 Qc7 17. Raf1 Rf6 18. Nh4 Raf8 19. Rxf6 Rxf6 20. Rxf6 Bxf6 21. Qg4 c4 22. Nf3 cxd3 23. cxd3 Qc5+ 24. Kh2 Qe3 25. Qxe6+ Kh7 26. Qxd7 Qf4+ 27. Kg1 Qe3+ 28. Kh2 Qf4+ 29. Kh1 Qc1+ 30. Kh2 Qxb2 31. Nd5 Kg6 32. Nxf6 gxf6 33. Qf5+ Kf7 34. Qd7+ Kg6

[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. Nc3 g6 2. d4 Bg7 3. e3 e6 4. Be2 Ne7 5. h3 O-O 6. Nf3 d5 7. b3 c5 8. Bb2 cxd4 9. exd4 Nbc6 10. O-O Nf5 11. Nb5 a6 12. Nc3 Qb6 13. Na4 Qa7 14. Nc5 Nfxd4 15. Nxd4 Qxc5 16. Nxc6 Bxb2 17. Rb1 Bg7 18. Na5 Qxa5

[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: 2r3k1/2r2p1p/3RpQ1p/3pP3/p2q4/8/P4PPP/4R1K1 w - - 5 22

[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: 6k1/5ppp/p3p1q1/2Pb4/3P3P/1r2QN2/5PP1/2R3K1 w - - 0 32

[Assistant] Qxb3


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

[User] FEN: 7k/1pp1PQp1/7p/Pp1P4/8/6PP/8/3q2K1 w - - 3 36

[Assistant] Qf1


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

[User] FEN: r2q1rk1/pp2b1pp/2n1pP1n/3p4/3P1PP1/2N2b1P/PP6/R1BQKBR1 w Q - 0 13

[Assistant] fxe7


[System] You are a 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: 6k1/6pp/5p2/3p1q2/3P4/1Q1nrN1P/6P1/1K3R2 w - - 1 37

[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 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bf5 7. Bd3

[Assistant] Bxd3


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

[User] 1. b3 e5 2. Bb2 Nc6 3. g3 d6 4. Bg2 f5 5. e3 Nf6 6. d3 Be7 7. Ne2 O-O 8. h3 Be6 9. Nd2 Qd7 10. a3 Kh8 11. c4 d5 12. Nf3 Bd6 13. Qc2 a5 14. c5 e4 15. cxd6 exf3 16. Bxf3 Qxd6 17. Nf4 Bf7 18. O-O Ne5 19. Bg2 c6 20. d4 Ned7 21. Qxf5 a4 22. b4 Nb6 23. Qe5 Qd7 24. Qg5 Nc4 25. Bc1 Rae8 26. Nd3 Ne4 27. Qh4 b6 28. g4 g5 29. Qh6 Rg8

[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] FEN: 5r2/pQ4bk/6p1/2R5/4p3/4P3/P3RP1q/4K3 b - - 0 40

[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: 6k1/1b3rp1/4p2p/3pR3/1p1P1q2/1P1BR1PP/P3Q2K/2r5 b - - 0 33

[Assistant] Qf2+


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

[User] 1. d4 d6 2. Nf3 Nf6 3. Bg5 g6 4. Nbd2 h6 5. Bh4 Nbd7 6. c3 Bg7 7. e4 c6 8. Bc4 d5 9. exd5 cxd5 10. Bd3 g5 11. Bg3 e6 12. Ne5 Nxe5 13. Bxe5 Bd7 14. O-O Bc6 15. Qe2 Qb6 16. Nb3 O-O 17. Rfe1 Rad8 18. Bc2 Ne4 19. Bxg7 Kxg7 20. f3 Nf6 21. Rad1 Qc7 22. Nc5 b6 23. Nd3 Nd7 24. Ne5 Nxe5 25. Qxe5+ Qxe5 26. Rxe5 Bb7 27. Bd3 Rc8 28. Rde1 a6 29. Kf2 b5 30. a3

[Assistant] Rc7


[System] You are a chess 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. Bg5 Nf6 5. Bxf6 h6 6. Bxg7 Rh7 7. Bxh6 Rxh6 8. Nf3 Rh7 9. Qd2 Nc6 10. h3 Bf5 11. g4 Bd7 12. Ng5 Rg7 13. Bg2 e5 14. dxe5 Nxe5 15. b3

[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] FEN: 8/5p2/2p1p1p1/1rN1Pk2/5P2/1p2K3/1R6/8 w - - 1 43

[Assistant] Rg2


[System] You are a chess 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 c6 3. d4 g6 4. Nf3 Bg7 5. Bd3 e5 6. O-O Nd7 7. Ne2 Ngf6 8. c3 O-O 9. dxe5 dxe5 10. Qc2 Nc5 11. Rd1 Qe7 12. Ng3 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] 1. g3 c6 2. Bg2 d5 3. Nh3 Nf6 4. f4 h5 5. Ng5 h4 6. d3 hxg3 7. hxg3 Rxh1+ 8. Bxh1 Nh5 9. Kf2 e5 10. e3 Nf6 11. Bf3 Bd6 12. d4 exd4 13. exd4 Bf5 14. Nc3 Nbd7 15. Bd2 Qe7 16. Qh1

[Assistant] O-O-O


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Na6 7. Nge2 c5 8. Qd2 Be6 9. d5 Bd7 10. g4 Nc7 11. h4 b5 12. Ng3 bxc4

[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. e4 e5 2. d4 Nc6 3. dxe5 Nxe5 4. Nc3

[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. d4 Nf6 2. c4 e6 3. Nf3 d5 4. cxd5 exd5 5. Bg5 c6 6. Nc3 Be7 7. h3 h6 8. Bf4 Bf5 9. e3 Nbd7 10. Bd3 Bxd3 11. Qxd3 Nf8 12. O-O Ng6 13. Bh2

[Assistant] Bd6


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

[User] FEN: 6Rk/2q2p2/p2pn2p/1p1Bp2r/4P3/P4P2/1PPQ1P2/R4K2 b - - 0 26

[Assistant] Kxg8


[System] You are a chess 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 d6 3. Nc3 Nc6 4. Nf3 e5 5. dxe5 Nxe5 6. Nxe5 dxe5 7. Qxd8+ Kxd8 8. Bg5 c6 9. O-O-O+ Ke8 10. Ne4 Be7 11. Bxf6 gxf6 12. Nd6+ Bxd6 13. Rxd6 Ke7 14. Rd2 Be6 15. e3 a5 16. Be2 Rad8 17. Rhd1 Rxd2 18. Rxd2 b6 19. b3 f5 20. g3 c5 21. Bf3 e4 22. Be2 Ra8 23. Kb2 h6 24. Kc3 a4 25. b4 a3 26. Rd1 Ra4 27. Rb1 Kf6 28. bxc5 bxc5 29. Rb5 Ra7 30. Rxc5 Rb7 31. Rb5 Rxb5 32. cxb5 Bxa2 33. Kb4 Ke5

[Assistant] Kxa3


[System] You are a chess 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 c6 2. Bg2 d6 3. Nf3 Nf6 4. O-O g6 5. h3 Bg7 6. d4 O-O 7. b3 c5 8. Bb2 cxd4 9. Nxd4 a6 10. Nd2 Qc7 11. a4 Nc6 12. N2f3 Rb8 13. Rb1

[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: r4r2/pp2qpkp/2n1b1p1/3p2Q1/2pP3N/2P1R3/PP3PPP/R4BK1 w - - 8 20

[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. d4 e6 2. Nc3 d5 3. e4 Nf6 4. e5 Nfd7 5. Nf3 c5 6. Bf4 Nc6 7. dxc5 Bxc5 8. Bd3 f6 9. Qe2 fxe5 10. Nxe5 Ndxe5 11. Bxe5 Nxe5 12. Qxe5 O-O 13. O-O-O Bxf2 14. Rhf1 Bd7 15. Qh5 Be3+ 16. Kb1 Bh6 17. g4 Qg5 18. Qh3 Rf2 19. Qg3 Rxf1 20. Rxf1 Rf8

[Assistant] Rxf8+


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

[User] 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Ba6 5. b3 Bb4+ 6. Bd2 Be7 7. Bc3 O-O 8. Bg2 d5

[Assistant] Nbd2


[System] You are a 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: 2r2rk1/5pp1/p4q2/1p3Np1/4Bn2/2P4Q/PP4PP/3R2K1 w - - 1 27

[Assistant] Ne7+


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

[User] 1. b3 e6 2. g3 f5 3. Bg2 Nf6 4. Nf3 d5 5. Bb2 c6 6. d3 Be7 7. Nbd2 O-O 8. O-O Nbd7 9. Re1 e5 10. e4 fxe4 11. dxe4 d4 12. c3

[Assistant] c5


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

[User] FEN: 8/2p3rk/3p4/P2Pp3/4Pp2/1P1P1R2/4KQq1/8 b - - 0 39

[Assistant] Qh1


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

[User] 1. b4 e6

[Assistant] Bb2


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

[User] 1. g3 Nf6 2. Bg2 d5 3. d3 e5 4. Nc3 c6 5. e4 dxe4 6. dxe4 Qxd1+ 7. Nxd1 Be6 8. h3 Nbd7 9. Be3 O-O-O

[Assistant] Nc3


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

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Nc6 6. c4 Qh5 7. d5 Ne5 8. Be2 Bg4 9. Nc3 O-O-O 10. Be3 e6

[Assistant] Nxe5


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

[User] FEN: 8/8/5k2/1P5p/2pp1K2/2P5/8/8 w - - 0 41

[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] 1. Nf3 d5 2. d3 Nf6 3. Nbd2 c6 4. c3 g6 5. Qc2 Bg7 6. e3 O-O 7. Be2 Re8 8. O-O e5 9. e4 Nbd7 10. Re1 Nc5 11. Bf1 a5 12. a4 b6 13. b3 Ba6 14. Ba3 dxe4 15. dxe4 Bxf1 16. Nxf1 Qd3 17. Qxd3 Nxd3 18. Re2 Nf4 19. Rd2 Nxe4 20. Rdd1 Nxc3 21. Re1 e4 22. N3d2 Nce2+ 23. Kh1 Bxa1 24. Rxa1 Nc3 25. Ne3 Ncd5 26. Ndf1 Nxe3 27. fxe3 Nd5 28. Kg1 Rad8 29. Kf2 Nb4 30. Ra2 Nd3+ 31. Ke2 Nb4 32. Rb2 Nd3 33. Rc2 Nc5 34. Bxc5 bxc5 35. Rxc5 Rd6 36. Rxa5 Red8 37. Rc5 f5 38. Rc3 Rd1

[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: R1b1k3/2r5/3K4/1p1p1p2/1P2pP2/6P1/8/8 w - - 0 61

[Assistant] Kxc7


[System] You are a 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: r7/2p2k1p/p5p1/2pp4/3b2nq/B1N4P/PPPQ2P1/R6K w - - 0 28

[Assistant] Qf4+


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

[User] FEN: r2qk2r/ppp1bppp/3p1n2/4p3/Q1PnP1b1/2NP1NP1/PP3P1P/R1B1KB1R b KQkq - 2 8

[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 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. g3 h5

[Assistant] Nf3


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

[User] FEN: 2br4/1p5p/p2q2pk/Q1p2p2/3Nn2P/4PBP1/P4P2/1R4K1 w - - 0 31

[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] FEN: 6k1/2qp3p/4pp2/PQ1b2p1/8/5P2/1Br3nP/2R1R2K w - - 0 32

[Assistant] Rxc2


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

[User] 1. d4 e6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. Nf3 Ne7 6. g3 O-O 7. Bg2 f5 8. O-O e5 9. e4 d6 10. Ne1 Nd7 11. f3 Nf6 12. Nd3 h6 13. Qe2 g5 14. Rb1 f4 15. b4 b6 16. a4 Bd7 17. a5 Kh8 18. axb6 axb6 19. bxc5 bxc5 20. Nb5 Bxb5 21. Rxb5 Ng6 22. Qb2

[Assistant] h5


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 e5 5. Ke2 exd4 6. Nb5 Nc6 7. Nf3 Bg4 8. h3 Bxf3+ 9. gxf3 a6 10. Na3 Nf6 11. Nc2 Nh5 12. Ke1 O-O 13. Bd3 Qh4 14. Qd2 Be5 15. Qg5 Qxg5 16. Bxg5 Bf4 17. Bxf4

[Assistant] Nxf4


[System] You are a chess 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. e3 c5 4. Bd3 cxd4 5. exd4 d6 6. Nc3 Nf6 7. Bg5 e6 8. Bxf6 Qxf6 9. Qe2 Nd7 10. d5 e5 11. Nb5 Qd8 12. Nbd4 Be7 13. Ne6 f6

[Assistant] Nxd8


[System] You are a chess 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. d4 e6 3. c4 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nd2 a6 8. a4 Nbd7 9. e4 Bg7 10. Be2 O-O 11. O-O Re8 12. Re1 Ne5 13. f3 Bd7 14. Nf1 Bc8 15. h3 Ned7 16. Bf4 Nb6 17. Ne3 Nh5 18. Bh2 f5 19. a5 Nd7 20. Bxd6 fxe4 21. Nxe4 Bd4 22. Bf1 Bxb2 23. Nxc5 Bd4 24. Qxd4 Nxc5 25. Bxc5 Qg5 26. Ng4 Bxg4 27. hxg4 Nf4 28. Bb4 Nxd5 29. Bc4 Rad8 30. Rxe8+ Rxe8

[Assistant] Bxd5+


[System] You are a 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: 8/8/4pp2/3p1k2/2bP4/5K2/1N3PP1/8 w - - 0 51

[Assistant] Nxc4


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

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bf5 7. Bd3 Bg6 8. O-O e6 9. c4 Bd6 10. d5 cxd5 11. cxd5 e5 12. Nh4 O-O 13. Nf5 Qd7 14. Qf3 Na6 15. Be3 Nc5 16. Bxc5 Bxc5 17. h4 Bxf5 18. Bxf5 Qd6 19. Qh5 Rfd8 20. Bxh7+ Kf8 21. Be4 Ke7 22. Rac1 a5 23. a3 Rh8 24. Qg4 Rag8 25. Qh3 Bd4 26. Rc2 Qd7 27. Rfc1 Qxh3 28. Rc7+ Kf8 29. Rc8+ Qxc8 30. Rxc8+ Ke7 31. Rc2 Rc8 32. Rd2 Rc1+ 33. Kh2 Rxh4+ 34. Kg3 Rh6 35. Bf5 Rc7 36. Bg4 Kd6 37. b4 Rg6 38. Kf3 axb4 39. axb4 Rc3+ 40. Ke2 Rxg4 41. g3 Re4+ 42. Kf1 Rc1+ 43. Kg2 Ree1 44. g4 Rh1 45. Kf3 Rcg1 46. Ke2 Rh3 47. g5 Rxg5 48. b5 Rf5 49. b6 Rxf2+ 50. Kd1 Rxd2+ 51. Kxd2 Rb3 52. Kc2 Rxb6 53. Kc1 Kxd5 54. Kc2 Rc6+ 55. Kd2 b5 56. Kd3 Rc4 57. Kd2 b4 58. Kd3 b3

[Assistant] Kd2


[System] You are a chess 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. d3 d5 3. Nbd2 e6 4. g3 g6 5. Bg2 Nf6 6. O-O Bg7 7. e4 O-O 8. e5 Nfd7 9. Re1 Nc6

[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. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Nf3 Be7 5. e3 Ne4 6. cxd5 exd5 7. Bd3 Nxc3 8. bxc3 O-O 9. a4 h6 10. Ba3 c5 11. dxc5 Na6 12. Bxa6 bxa6 13. Nd4

[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] FEN: 2r1r1k1/1b1nqpbp/p2p2p1/P1pP4/1p3P2/1P1B4/1BQNN1PP/R4RK1 b - - 0 19

[Assistant] Bxb2


[System] You are a chess 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. d3 d5 3. exd5 Qxd5 4. Nc3 Qd8 5. f4 exf4 6. Bxf4 Bd6 7. Qe2+ Ne7 8. Bxd6

[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] 1. d4 c6 2. Nf3 d5 3. c4 Nf6 4. e3 Bg4 5. h3 Bxf3 6. Qxf3 e6 7. Nc3 Bb4 8. Bd2 Bxc3 9. Bxc3 Ne4 10. Bb4 Na6 11. a3 Nxb4 12. axb4 O-O 13. Bd3 f5

[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. d4 Nf6 2. Bf4 d5 3. e3 e6 4. Bd3 c5 5. Ne2 c4 6. Bxc4 dxc4 7. c3 Bd6 8. Bg5 Bd7 9. Nd2 Bc6 10. O-O b5 11. a4 Nbd7 12. axb5 Bxb5 13. Nc1 O-O 14. Ne2 Bxh2+ 15. Kxh2 Ng4+ 16. Kg1 Qxg5 17. Nf3

[Assistant] Qd8


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

[User] 1. Nf3 c5 2. g3 e6 3. Bg2 Nf6 4. O-O Be7 5. c4 d5 6. d4 dxc4 7. Nbd2 Nc6 8. Nxc4 cxd4 9. e3 dxe3 10. Qxd8+

[Assistant] Bxd8


[System] You are a chess 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. b4 e6 4. bxc5 Bxc5 5. d4 Bb4+ 6. c3 Be7 7. Bd3 d5 8. Nbd2 dxe4 9. Nxe4 Nf6 10. Qe2 Nxe4 11. Qxe4 Qa5 12. Bd2 Qd5 13. Qe2 O-O 14. O-O Bf6 15. Rfe1 Qh5 16. Rab1 b6 17. Rb5 e5 18. dxe5 a6

[Assistant] Rxb6


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

[User] 1. g3 d5 2. Bg2 e6 3. c4 Nf6 4. cxd5 e5 5. Nc3 c6 6. dxc6 bxc6 7. d3 Bd7 8. Nf3 Be7 9. Nxe5 O-O 10. Nxd7 Qxd7 11. O-O a5 12. Bg5 h6 13. Bf4 Na6 14. Rc1 Rac8 15. Ne4 Nxe4 16. dxe4 Qe6 17. e3 Rfd8 18. Qe2 Bd6 19. Qxa6 Rd7 20. Qxc8+ Kh7 21. Bxd6 Qxd6 22. Rfd1 Qxd1+ 23. Rxd1 Rxd1+ 24. Bf1 c5 25. Qf5+ g6 26. Qxc5

[Assistant] Kg8


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

[User] FEN: 3r1rk1/7p/p5q1/1p1Ppp2/2p5/4bP2/PPQ1B2P/3R1R1K w - - 4 26

[Assistant] Rg1


[System] You are a chess 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. Bxf6 gxf6 9. Na3 Bg7 10. Nd5 b5 11. Bd3 O-O 12. O-O Ne7 13. Nxe7+ Qxe7 14. c4 b4 15. Nc2 Rb8 16. Ne3 Be6 17. b3 a5 18. a3 Bh6 19. Nd5 Bxd5 20. exd5 e4 21. Bc2 f5 22. Qh5 Qf6 23. axb4 axb4 24. Ra6 Bg7 25. g4 fxg4 26. Qxg4 Rfe8 27. Bxe4 Re5 28. f3 Rg5 29. h3 Rxg4+ 30. hxg4 Qf4 31. Kg2 Be5 32. Rh1 h6 33. Rh5 Qg3+ 34. Kf1 Kg7

[Assistant] Ke2


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

[User] 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. Nc3 Be7 7. d4 cxd4 8. Qxd4 O-O 9. Bg5 Nc6 10. Qf4 Nh5 11. Qh4 Bxg5 12. Nxg5 h6 13. Qxh5 Qxg5 14. Qxg5 hxg5 15. Rfd1 Rfd8 16. Rd6 Kf8 17. Rad1 Ke7 18. b3 Na5 19. e4 Bc6 20. e5 Bxg2 21. Kxg2 Nb7

[Assistant] R6d4


[System] You are a 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: 8/3b1pp1/p5k1/8/P3R3/8/6K1/8 b - - 2 45

[Assistant] Bc6


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

[User] 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 O-O 7. O-O-O Ng4 8. Qg3 d6 9. f3 Nge5 10. h4 Be6 11. h5 Nc4 12. Bxc4 Bxc4 13. h6 g6 14. Nge2 Bxe2 15. Nxe2 Bxd2+ 16. Rxd2 Qf6 17. Nf4 Qe5 18. Rd5 Qe7 19. Rb5 a6 20. Nd5 Qe6 21. Rxb7 Rab8 22. Rxc7 Nb4 23. Re7 Nxa2+ 24. Kb1 Qc8 25. Qxd6 Nc3+ 26. Kc1 Nxd5 27. Qe5 f6 28. Qxd5+ Kh8

[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] FEN: 2r5/p3rpk1/1p3qb1/1Q4p1/2R1n1P1/2P1PN2/PP3PB1/R5K1 b - - 0 27

[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. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nge7 6. Nc2 Ng6 7. Nc3 Bc5 8. Be2 Qb6 9. O-O O-O 10. Na4 Qa5 11. Nxc5 Qxc5 12. Be3 Qe7 13. Qd2 f5 14. exf5 Rxf5 15. b4 a6 16. Bc5

[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 Nc6 2. c4 e5 3. d5 Nce7 4. e4 Ng6 5. Nc3 Bc5 6. Na4 Bb4+ 7. Bd2 Bxd2+ 8. Qxd2 d6 9. Nc3 Nf6 10. Nf3 O-O 11. Bd3 a5 12. O-O-O Bd7 13. Kb1 Nf4 14. g3 Nxd3 15. Qxd3 a4 16. Nh4 Ng4 17. Rdf1 a3 18. b3 c6 19. f3 Nf6 20. dxc6 Bxc6 21. Rd1 Ne8 22. Nf5 g6

[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. Nf3 c5 2. g3 e6 3. Bg2 Be7 4. O-O Nf6 5. d3 d5 6. c4 d4 7. e4

[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. d4 e6 2. Nf3 c5 3. Bg5 Qb6 4. e3 Qxb2 5. Nbd2 Qa3 6. Be2 Nc6 7. O-O Nf6 8. Nc4 Qa4 9. Rb1 d5 10. Nce5 Bd6 11. Bxf6 gxf6 12. Ng4 Ke7 13. h3 b6 14. c4 dxc4 15. Qxa4 Bd7 16. Qxc4 Na5 17. Qc2 h5 18. Ngh2 Rhg8 19. Kh1 Rg7 20. dxc5 Bxc5 21. Rbd1 Rag8 22. g4 hxg4 23. Nxg4 f5 24. Nge5 Bc8 25. Bb5 Kf6 26. Qc3 Bb7 27. Bc6 Nxc6 28. Nxc6+ Kg6 29. Nfe5+ Kh7 30. Rg1 f6 31. Rxg7+ Rxg7 32. Rc1 fxe5 33. f3 Bxc6 34. Rf1 Rg3 35. Qxe5 Rxf3 36. Kg2 Rxe3+ 37. Qd5 Bxd5+ 38. Kf2 Rf3+ 39. Kg2 Rxf1+ 40. Kxf1 Kh6 41. h4 Kh5 42. Ke1 Kxh4 43. Kd2 Ba3 44. Kc2 Bxa2 45. Kd2 e5 46. Kd3 e4+ 47. Kd2 f4 48. Ke1 f3 49. Kf1 Kg3 50. Ke1

[Assistant] f2+


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

[User] 1. b3 d6 2. Bb2 Be6 3. d4 c5 4. d5 Bd7 5. e4 Nf6 6. Nd2 g6 7. Bd3 Bg7 8. Ne2 O-O 9. h4 a6 10. h5 Nxh5 11. Bxg7 Nxg7 12. Nf3 e6 13. Qd2 h5 14. Qh6 f6 15. Qxg6 Qe8 16. Qh6 e5 17. Nh4 b5 18. Ng6 Kf7 19. Nxf8 Qxf8 20. Ng3 Qh8 21. Qxh8 Nc6 22. Qxa8 Nd4

[Assistant] Qa7


[System] You are a 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/ppqR1pp1/2p4p/5Q2/8/1B5P/PbP3P1/4r1K1 w - - 4 25

[Assistant] Kf2


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

[User] FEN: 2r3k1/4R1p1/3qN3/3p1Pp1/p2K4/3R4/8/8 w - - 0 44

[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 g6 2. Nc3 Bg7 3. d4 c5 4. d5 d6 5. Nf3 Nf6 6. Bb5+ Bd7 7. Bd3 a6 8. O-O b5 9. a3 c4 10. Be2 e5 11. dxe6 Bxe6 12. e5 dxe5 13. Qxd8+ Kxd8 14. Nxe5

[Assistant] Kc7


[System] You are a chess 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 c6 2. Bg2 d5 3. Nf3 Nf6 4. O-O Bg4 5. Ne5 Bf5 6. Nf3 Nbd7 7. Nd4

[Assistant] Bg6


[System] You are a chess 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 c6 2. Bg2 d6 3. Nf3 Nf6 4. O-O g6 5. d4 Bg7 6. c4 O-O 7. Nc3 Nbd7 8. d5 Re8 9. dxc6 bxc6 10. Nd4 Bb7 11. Nxc6 Bxc6 12. Bxc6 Qc7 13. Bg2 Rac8 14. b3 Ng4 15. Nd5 Qb8 16. Rb1 Nge5 17. Bg5 Nc6 18. b4 h6 19. Be3 Nce5 20. c5 dxc5 21. bxc5 Qa8 22. Nxe7+ Rxe7

[Assistant] Bxa8


[System] You are a chess 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. Qe2 Be7 3. c3 c6 4. g3 d5 5. Bg2 dxe4 6. Bxe4 Nf6 7. Bc2 b6 8. Nf3 Bb7 9. O-O c5 10. d4 Nbd7 11. Rd1 Qc7 12. dxc5 Nxc5 13. Bf4 Qc6 14. Na3 Qxf3 15. Qxf3 Bxf3 16. Rd3 Be4 17. Rd2 Bxc2 18. Nxc2 Nd5 19. Be5 Bf6 20. Bd4 Bxd4 21. Nxd4 O-O 22. b4 Ne4 23. c4 Nxd2 24. cxd5 exd5 25. Nc6 Nf3+ 26. Kg2 Ng5 27. Ne7+ Kh8 28. Nxd5 Ne6 29. Nf4 Rfd8 30. Nd3 Rxd3 31. a4 Rad8 32. a5 Rd1 33. axb6 Rxa1 34. b7 Rb8 35. b5 Rxb7 36. b6 Rxb6 37. Kf3

[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] FEN: r1bqkbnr/p1N2ppp/8/8/1n1p4/2Q5/PP2PPPP/R1B1KBNR b KQkq - 1 10

[Assistant] Kd7


[System] You are a chess 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. d3 e6 3. Bg5 Be7 4. c3 h6 5. Bxf6 Bxf6 6. Nbd2 c5 7. e4 c4 8. Be2 cxd3 9. Bxd3 Nc6 10. Bc2 Ne5 11. Nxe5 Bxe5 12. Nf3 Bc7 13. Qe2 d5

[Assistant] O-O-O


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

[User] 1. c4 e6 2. Nc3 d5 3. d4 dxc4 4. e3 Nf6 5. Nf3 Be7 6. Be2 O-O 7. O-O b6 8. Bxc4 Bb7 9. Bd3 Nbd7 10. Be2 Re8 11. Bd2 Nf8 12. Rb1 Rc8 13. Rc1 c6 14. a3 Qc7 15. b4 Qd7 16. b5 c5 17. dxc5 Bxc5 18. Na4 Bxa3 19. Rxc8 Rxc8 20. Nc3 Rd8 21. Nd4 Bc5 22. Nf3 Bb4 23. Qc2 Bxf3 24. Bxf3 Rc8 25. Rd1 Bxc3 26. Bxc3 Qxb5 27. Qd2 Qc4 28. Bxf6 gxf6 29. g3 Ng6 30. Kg2 b5 31. Be2 Qc7 32. Qb2 a6 33. Qxf6 Qc6+ 34. Bf3 Qc7 35. Qg5 Kg7 36. Qh6+ Kxh6 37. h4 Kg7 38. h5 Ne5 39. h6+ Kxh6 40. Be4 f5 41. Rh1+ Kg6 42. f4 fxe4 43. f5+ exf5 44. Rh4 Qc2+ 45. Kh3 Qe2

[Assistant] Rf4


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

[User] FEN: 1k6/ppp2pp1/2pr3q/7n/4P2Q/2NP4/PPP2PK1/R4R2 b - - 5 25

[Assistant] Nf4+


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

[User] 1. b3 Nf6 2. Bb2 g6 3. g4 Bg7 4. e3 d6 5. Be2

[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: 5k2/8/3b1PBP/5KP1/8/1p6/8/6r1 w - - 0 60

[Assistant] h7


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

[User] 1. Nf3 Nf6 2. e3 b6 3. b3 Bb7 4. Bb2 c5 5. d3 e6 6. Nbd2 d5 7. g3 Nbd7 8. Bg2 Bd6 9. O-O O-O 10. Re1 Qc7 11. c4 Rfe8 12. Qc2 Rac8 13. Rad1 Bf8 14. Qc1 Qb8 15. Qa1 Qa8 16. e4 d4 17. Rf1 h5 18. b4 e5 19. b5 a6 20. a4 a5 21. Ng5 Rcd8 22. f4 Ng4 23. Rf2 exf4 24. gxf4 Ndf6 25. Re2 Qb8 26. Rf1 Ne3 27. Rf3 Nfg4 28. h3 Nc2 29. Qc1 Nge3 30. Nf1 Nxf1 31. Rxf1 Ne3 32. Rxe3 dxe3 33. Qxe3 Qd6 34. Rd1 Qg6 35. f5 Qh6 36. Qg3 Bd6 37. Qh4 Be5 38. Bxe5 Rxe5 39. Nxf7 Kxf7 40. Qxd8 Qe3+ 41. Kh1 Qe2 42. Rf1

[Assistant] Qe3


[System] You are a chess 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 Nf6 4. e4 e6 5. e5 Nd5 6. Bxc4 Nxc3 7. bxc3 c5 8. Nf3 cxd4 9. cxd4

[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. d3 c6 2. g3 d5 3. Bg2 h6 4. Nf3 Nf6 5. O-O Bg4 6. Nbd2 Qc8 7. e4

[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. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. O-O g6 6. c3 Bg7 7. h3 O-O 8. Nbd2 Bd7 9. Ba4 a6 10. Re1 b5 11. Bc2 d5 12. Nf1 Re8 13. Bg5 h6 14. Bh4 d4 15. cxd4 Nxd4 16. Nxd4 g5 17. Bg3 exd4 18. Bb3 Be6 19. Rc1 Nd7 20. Bxc7 Qe7 21. Bxe6 Qxe6 22. Ng3 Rac8 23. Nf5 Bf8 24. b3 Nf6 25. Ba5 Nd5 26. Bd2 Nc3 27. Bxc3 dxc3 28. Rc2 b4 29. Qg4 Rcd8

[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] FEN: 8/1b6/p7/1pPpkBpp/1P3pP1/P2K1P1P/8/8 w - - 0 42

[Assistant] Bd7


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

[User] FEN: r2r4/3q1kbp/p2pp1p1/1p1Q4/4NP2/7P/PP3PP1/4R1K1 w - - 0 25

[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] FEN: 2r3k1/p1r2ppp/2bqp3/1Q2N3/P4P2/5RP1/4P1KP/2R5 w - - 0 31

[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. d4 Nf6 2. Bg5 Ne4 3. Bh4 g5 4. f3 gxh4 5. fxe4 e5 6. c3 Nc6 7. Nf3 h3 8. g3 Bg7 9. e3 O-O 10. Bxh3 d6 11. Bxc8 Qxc8 12. O-O f5 13. Qb3+ Kh8 14. Ng5 Qd7 15. Qe6 Qd8 16. Nf7+ Rxf7 17. Qxf7 fxe4 18. Nd2 Qg5 19. Rae1 d5 20. Qxd5 exd4 21. Qxg5 dxe3 22. Rxe3 Rd8

[Assistant] Nxe4


[System] You are a 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/pp3pp1/2n2np1/4b3/1P2q3/P3NNPP/1B1Q1PK1/8 w - - 5 29

[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. b3 e6 2. Bb2 f6 3. d3 Be7 4. Nd2 Nh6 5. e4 Nf7 6. f4 O-O 7. Ngf3 d6 8. e5 fxe5 9. fxe5 dxe5 10. Nxe5 Nc6 11. Nxf7 Rxf7 12. Nf3 Rf8 13. Be2 Bf6 14. O-O Bxb2 15. Rb1

[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] 1. e3 c6 2. d4 d6 3. c3 g6 4. Nd2 Bg7 5. Ngf3 Nf6 6. Be2 O-O 7. O-O Bg4 8. b3 Bxf3 9. Bxf3 Nbd7 10. Be2 Rc8 11. Bb2 a6 12. Rb1 Re8 13. Rc1 Nf8 14. c4 N8d7 15. Bf3 Nf8 16. g3 N8d7 17. Bg2 Qc7 18. Re1 Qd8 19. Rf1 Qa5 20. Re1

[Assistant] Qxa2


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

[User] FEN: r2q1rk1/p4p1p/2p2Q2/4R3/6P1/5PKb/1P5P/2n5 w - - 2 26

[Assistant] Rg5#


[System] You are a chess 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. Nf3 d5 4. g3 dxc4 5. Bg2 Nc6 6. Qa4 Bb4+ 7. Bd2 Bd6 8. O-O O-O 9. Qxc4 e5 10. Rd1 exd4 11. Nxd4 Nxd4 12. Qxd4 Qe7 13. Nc3 c6 14. Bg5 Be5 15. Qd2 h6 16. Bf4 Bg4 17. h3 Bf5 18. Bxe5 Qxe5 19. e4 Bh7 20. f4 Qc5+

[Assistant] Qf2


[System] You are a 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/4k1p1/5p2/5PP1/5N1P/4Kn2/8 b - - 2 43

[Assistant] Nxh3


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

[User] 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 Nc6 5. Bc4 Nb6 6. Bb3 d6 7. exd6 Qxd6 8. d4 Be6 9. dxc5 Qxd1+ 10. Kxd1 Bxb3+ 11. axb3 Rd8+ 12. Ke2 Nd5 13. b4 a6 14. Na3 g6 15. Nc4 Bg7 16. Rd1 O-O 17. g3 Rfe8 18. Ne3 Nf6 19. Rxd8 Rxd8 20. Bd2 e5 21. Nc4 e4 22. Nfe5 Nxe5 23. Nxe5 Nd5 24. Nc4 f5

[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. b3 d6 2. Bb2 c5 3. g3 Nc6 4. Bg2 Nf6 5. Nf3 e6 6. O-O Be7 7. e3 O-O 8. Re1 d5 9. a4 d4 10. Ne5 dxe3 11. Nxc6 bxc6 12. Rxe3 Qc7 13. Rd3 Nd5

[Assistant] Na3


[System] You are a chess 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 b6 2. Bc4 Bb7 3. Qf3 e6 4. Nc3 Nf6 5. d3 Be7

[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] FEN: r4k2/5pp1/pp3q1p/2p5/P2pP3/3P2bP/1PP3P1/R1N2QK1 b - - 0 23

[Assistant] Bh2+


[System] You are a 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: 3b2k1/4q2p/p1p1b1p1/PpPp4/1P1Pp1P1/4P1QP/5RK1/5N2 b - - 10 37

[Assistant] Bc7


[System] You are a 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: 3r1k1r/p1p1qp1p/b2b1N1p/3Bn3/5Q2/8/PPP2PPP/2KR3R w - - 9 17

[Assistant] Qxh6#


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

[User] FEN: 2k3rr/1pp5/3pqn2/pP6/P2QP2p/B2P3P/5PP1/2R2RK1 b - - 2 22

[Assistant] Qxh3


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

[User] 1. d4 d6 2. Nf3 Nd7 3. e3 Ngf6 4. Be2 g6 5. O-O Bg7 6. c4 O-O 7. Nc3

[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 c5 2. Nf3 cxd4 3. Nxd4 Nc6 4. e3 Nf6 5. c4 d6 6. b3 g6 7. Bb2 Bg7 8. g3 O-O 9. Bg2 Bd7 10. O-O Rc8 11. Nc3 a6 12. Rc1 Nxd4 13. exd4 Bg4 14. Qd2 Qa5 15. Bxb7 Rc7 16. Bg2 h6 17. Rfe1 Rb8

[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] FEN: 8/p3pQb1/2bp2pk/1p3P2/4P3/2r4P/P5PK/5r2 w - - 1 33

[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] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Bg2 d6 6. Nf3 Nbd7 7. O-O e5 8. h3 a6 9. Be3 Re8 10. Qc2 Rb8 11. Rfd1 exd4 12. Nxd4 Ne5 13. b3 Bd7 14. Rac1 h5 15. Nd5 c6 16. Nf4 h4 17. gxh4 c5 18. Nf3 Nxf3+ 19. Bxf3 Bf5 20. Qd2 Ne4 21. Bxe4 Bxe4 22. Qxd6 Qxh4 23. Qd7 Bf5 24. Qc7 Be5

[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. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Qe2 Ndf6 6. Nxf6+ Nxf6 7. Nf3 Bg4 8. g3 e6 9. Bg2 Be7 10. c3 Bh5 11. h3 O-O 12. g4 Bg6 13. Ne5

[Assistant] Nd5


[System] You are a chess 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. Bh6 Nxh6 4. Nc3 d5 5. e5 c6 6. f4 Bg4 7. Qd2 Nd7 8. h3 Be6 9. g4 Ng8 10. Bd3 Nb6 11. f5 Bd7 12. Nf3 h5 13. O-O-O gxf5 14. Kb1 fxg4 15. Ng5 Be6 16. Nxe6 fxe6 17. Bg6+ Kd7 18. hxg4 Bh6 19. Qe2 hxg4 20. Qxg4 Bg7 21. Bf7 Rxh1 22. Qxe6+ Kc7 23. Rxh1 Nh6 24. Rxh6 Bxh6 25. Qxh6 Qh8 26. Qc1 Rf8 27. e6 Nc8 28. b3 Nd6 29. Kb2 Qxd4 30. a4 Ne4 31. Qe1 Nxc3 32. Qxc3 Qxc3+ 33. Kxc3 Kd6 34. Kd4 c5+ 35. Ke3 Rh8 36. c4 d4+ 37. Ke4 Rh3 38. Kf5 Rxb3 39. Kg6 Rb4 40. Kg7 Rxc4 41. Kf8 Rxa4 42. Ke8 Rc4 43. Kd8 d3 44. Kc8 Rd4 45. Kb8 c4 46. Ka8 c3 47. Kb8 c2 48. Be8 d2 49. Bd7 c1=Q 50. Ka8 Qc7 51. Kxa7 b5+

[Assistant] Ka8


[System] You are a chess 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. b4 cxb4 7. Bd3 bxc3 8. Nxc3 Bb4 9. Bd2 Nge7 10. Rb1 Qa5 11. Nb5 Bxd2+

[Assistant] Nxd2


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

[User] 1. d4 d6 2. Nf3 Nd7 3. Bg5 Ngf6 4. Bxf6 Nxf6 5. e3 e6 6. c4 Be7 7. Nc3 O-O 8. Bd3 Bd7 9. Bc2 Rc8 10. h3

[Assistant] c5


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

[User] 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6 7. Nh3 Ba6 8. Bxa6 Nxa6 9. O-O Nc7 10. Nf4 Be7 11. Qg4 g6 12. Nf3 h5 13. Qg3 Nf8 14. h4 a5 15. Nh3 a4 16. Nfg5 Bxg5 17. Bxg5 Qd7 18. Bf6 Rg8 19. Ng5

[Assistant] Nb5


[System] You are a chess 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 Nf6 3. Nf3 g6 4. O-O Bg7 5. d4 O-O 6. c4 b6 7. cxd5 Nxd5 8. e4 Nf6 9. Nc3 Bb7 10. Qe2 c5 11. d5 Nbd7 12. Rd1 Ng4 13. h3 Nge5 14. Nd2 c4 15. f4 Nd3 16. Nxc4 Nxc1 17. Raxc1 Rc8 18. Ne3 Nc5 19. b4 Nd7 20. Qd3 Nf6 21. e5 Nd7 22. Kh2 a6 23. a3 b5 24. Ne4 Nb6 25. Nc5 Qc7 26. Nxb7 Qxb7 27. d6 exd6 28. Bxb7 Rcd8 29. Qd4 Na4 30. Qe4 dxe5 31. fxe5 Rde8 32. Bd5 Rxe5 33. Qf3 Nb2 34. Rf1 Nc4 35. Nxc4 bxc4 36. Bxc4 h5 37. Rcd1 Kh7 38. Rd7 f5 39. Qb7 Rg8 40. Bxg8+ Kh6 41. Rxg7 Re2+ 42. Kg1 h4 43. Rh7+

[Assistant] Kg5


[System] You are a 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: r1b2rk1/1p1pbpp1/p2qp2p/2p4P/1nP1N1P1/1P2PN2/PQ1PKPB1/R6R b - - 2 16

[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. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. cxd5 Be7 6. Bg5 exd5 7. Bxf6 Bxf6 8. e3 Be6 9. Bd3 O-O 10. O-O g6 11. Nd2 Nd7 12. f3 Bg7 13. Re1 c5 14. dxc5 Nxc5 15. Nb3 Nxd3 16. Qxd3 Rc8 17. Nd4 Bd7 18. Rac1 Bc6 19. a4 Qb6 20. h3

[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] 1. Nf3 d5 2. g3 e6 3. Bg2 f5 4. d3

[Assistant] Be7


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. e3 O-O 6. Be2 c5 7. O-O cxd4 8. exd4 Nc6 9. Be3 Bg4 10. d5 Bxf3 11. Bxf3 Ne5 12. Be2 Rc8 13. f4 Nxc4 14. b4 Nxe3 15. Qd3 Nxf1 16. Rxf1 Qb6+ 17. Kh1 Qxb4 18. Nd1 Rc1 19. a3 Qb1 20. Qxb1 Rxb1 21. Ne3 Rxf1+ 22. Nxf1 Nxd5 23. a4 Nxf4 24. g3 Nxe2 25. Kg2 Rc8 26. a5 b5 27. Ne3 b4 28. Kf2 Nd4 29. Nd5

[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 Nf6 2. Nf3 g6 3. Nc3 Bg7 4. Bg5 O-O 5. e4

[Assistant] d6


[System] You are a chess 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 a6 2. d4 b5 3. e4 b4 4. Nce2 e6 5. Ng3 Bb7 6. Bd3 c5 7. dxc5 Bxc5 8. Nf3 Nc6 9. O-O Nf6 10. e5 Ng4

[Assistant] Ne4


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

[User] FEN: R7/5p2/6pk/7p/p7/PbB2PP1/4r2P/6K1 w - - 4 37

[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. d4 d5 2. c4 e6 3. Nc3 c6 4. cxd5 exd5 5. Bf4 Bd6 6. Bxd6 Qxd6 7. Qc2 Ne7 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 Qg6 11. Qxg6 hxg6 12. Nf3 Nd7 13. O-O-O O-O 14. Kb1 Rfe8 15. Rhe1 Nf5 16. g4 Nd6 17. Nd2 Nf6 18. h3 Re7 19. Kc2 Rae8 20. Kd3 g5 21. f3 g6 22. Re2 Kg7 23. Rde1 Rh8 24. b3 Rxh3 25. Kc2 b5 26. b4 Nc4

[Assistant] Nxc4


[System] You are a 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: 4r1kr/p2nq3/2Q4p/1p1p1R2/3P4/8/PP3PP1/5RK1 w - - 0 32

[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] FEN: r7/p1k3p1/2p1pn1r/3P3p/4p2q/BP2P3/P3BPP1/R2Q1RK1 b - - 0 21

[Assistant] Ng4


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

[User] FEN: r4rk1/1bqn1ppp/3bp3/pp6/2pPQ3/P1P2NB1/1P2BPPP/R3K2R w KQ - 1 15

[Assistant] Bxd6


[System] You are a chess 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. g3 Nc6 4. Bg2 g6 5. Nge2 Bg7 6. O-O e6 7. h3 Nge7 8. d3 O-O 9. Kh2 b5 10. f4 b4 11. Nb1 d5 12. Nd2 dxe4 13. Nxe4 Qb6 14. Nd6 Bd7

[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 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 a6 6. a4 d6 7. b4 Ba7 8. h3 Be6 9. Bxe6 fxe6 10. O-O O-O 11. Be3 Bxe3 12. fxe3 d5 13. exd5 exd5 14. Nbd2 Qe7 15. e4 dxe4 16. Nxe4 Nxe4 17. dxe4 Rad8 18. Qb3+ Qf7 19. Qxf7+ Rxf7 20. Rad1 Rfd7 21. Rxd7 Rxd7 22. Re1 Re7 23. Kf2 Kf7 24. Ke3 h6 25. Nh4 Ke6 26. Nf5 Rd7 27. Re2 Ne7 28. Ng3 g6 29. Rd2 Rxd2 30. Kxd2 Nc8 31. Ke3 Nd6 32. Nf1 b5 33. axb5 Nxb5 34. Kd3 Nd6 35. c4 Nb7 36. Ne3 a5 37. bxa5 Nxa5 38. c5 c6 39. g3 Nb7 40. Kc4 Nd8 41. Ng4 h5 42. Nf2 Kf6 43. Nd3 Ne6 44. Nb4 Nd8 45. Kb3 Ke6 46. Ka4 Kd7 47. Ka5 Kc7 48. Na6+ Kb7 49. Nb4 Ne6 50. Nd3 Ng5 51. Nf2 Ne6 52. Kb4 Kc7 53. Kc4 Ng5 54. h4 Ne6 55. Nd3 Kd7 56. Nxe5+ Ke7 57. Nxg6+ Kf6 58. Nf4 Ke5 59. Nxe6 Kxe6 60. Kd4 Kf6 61. e5+ Ke6 62. Ke4 Ke7 63. Kf5 Kf7 64. e6+ Ke7 65. Ke5 Ke8 66. Kf6 Kf8 67. e7+ Ke8 68. Kg6 Kxe7 69. Kxh5 Ke6 70. Kg6 Kd5 71. h5 Kxc5 72. h6 Kb4 73. h7 c5 74. h8=Q c4 75. Qb2+

[Assistant] Kc5


[System] You are a 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: 6q1/p2k1p2/2p2K1Q/1pPpPP2/1P6/P7/8/8 w - - 15 44

[Assistant] Qh5


[System] You are a chess 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 Bg4 5. Ne5

[Assistant] Bf5


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3

[Assistant] d6


[System] You are a 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: 6k1/1p3rP1/2pp3p/4p2N/p2pP3/2qP3P/2P2QPK/8 w - - 1 40

[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] FEN: 3Rr1k1/6pp/1Q2p1q1/2p1P3/2P1p3/1P2b3/PB2B2P/6RK b - - 0 26

[Assistant] Qxg1#


[System] You are a chess 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. Bg5 cxd4 4. Bxf6 d6 5. Nxd4 exf6 6. Nb3 Be7 7. c3 O-O 8. g3 Nc6 9. Bg2 Be6 10. O-O a5 11. N1d2 a4 12. Nd4 a3 13. b3 Nxd4 14. cxd4 d5 15. Rc1 b5 16. Qc2 b4 17. Nf3 Bg4 18. Qd2

[Assistant] Qd7


[System] You are a chess 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 d6 3. Bg5 c6 4. Bxf6 exf6 5. e3 g6 6. Nbd2 Bg7 7. Bd3 O-O 8. h4 Nd7 9. h5 f5 10. hxg6 hxg6 11. c3 Nf6 12. Qc2 d5 13. O-O-O Qa5 14. Kb1 b5 15. Nb3 Qa4 16. Ne5 Bb7 17. Bxf5 gxf5 18. Qxf5 Bc8 19. Qg5 Re8 20. Nxc6 b4 21. Nxb4 Qd7 22. Nc5 Qf5+ 23. Qxf5 Bxf5+ 24. Kc1 Ne4 25. Nxe4 Bxe4 26. f3 Bg6 27. Rhe1 Re7 28. Nxd5 Rd7 29. Nf4 a5 30. Nxg6 fxg6 31. e4 a4 32. a3 Rb8 33. e5 Rdb7 34. Re2 Bh6+ 35. Kb1 g5 36. Rh1 Rb6 37. Rh5 Kg7 38. g4 Rg6 39. Rh1 Rh8 40. Rf1 Kg8 41. e6 Kg7 42. d5 Rd8 43. c4 Kg8 44. Rd1 Bf8 45. Kc2 Bc5 46. Kc3 Rg7 47. b4 axb3 48. Kxb3 Rb7+ 49. Ka2 Rdb8 50. d6 Ra7 51. Rd3 Rxa3+ 52. Rxa3 Bxa3 53. Kxa3 Rb6 54. d7 Ra6+ 55. Kb4 Ra8 56. Kc5 Rd8 57. e7 Rxd7 58. e8=Q+

[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. Nf3 d6 2. g3 Nf6 3. Bg2 g6 4. O-O Bg7 5. d4 O-O 6. c4 c6 7. Nc3 Bd7 8. d5 Qc8 9. dxc6 bxc6 10. Bg5 Bh3 11. c5 Bxg2 12. Kxg2 d5 13. Qa4 Ne4 14. Bxe7 Re8 15. Bh4 Nxc3 16. bxc3 Bxc3 17. Rab1 Bg7 18. Rfe1 Nd7 19. e4

[Assistant] Nxc5


[System] You are a chess 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 c5 3. e5 cxd4 4. Nf3 d6 5. exd6 e5 6. Nbd2 Bxd6 7. Nc4 f6

[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] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. O-O g6 6. d4 d6 7. dxe5 Nxe5 8. Nxe5 dxe5 9. Bxf7+ Ke7 10. Qxd8+ Kxd8 11. Bxg6 Rg8

[Assistant] Bf7


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

[User] 1. e4 e6 2. Qe2 d5 3. exd5 Qxd5 4. Nc3 Qd8 5. g3 Nf6 6. Bg2 Be7 7. Nf3 O-O 8. O-O c5 9. Ne5 Nc6 10. Nxc6 bxc6 11. Bxc6 Rb8 12. Bg2 Nd5 13. Nxd5 exd5 14. b3 Bf6 15. c3 d4 16. Bb2 d3 17. Qe3 Re8 18. Qf3 Bb7 19. Qxb7 Rxb7 20. Bxb7 Re2 21. Bc1 h5 22. Bf3

[Assistant] Re7


[System] You are a chess 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. Be2 d6 5. d3 Be7 6. h3 Nf6 7. O-O Be6 8. b3 O-O 9. a4 Rc8 10. Nb1 Nd4 11. c4 b6 12. Nxd4 cxd4 13. f4 exf4 14. Bxf4 Nd7 15. Bh2 Ne5 16. Nd2 Bg5 17. Bxe5 Be3+ 18. Kh1 dxe5 19. Nf3 f6 20. b4 Qe7 21. b5 g6 22. a5

[Assistant] bxa5


[System] You are a chess 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 d6 6. Bc4 e5 7. Nf5 a6 8. Bg5 Bxf5 9. exf5 Be7 10. O-O Qc8 11. Bxf6 Bxf6 12. Nd5 O-O 13. Nb6 Qxf5 14. Nxa8 Rxa8 15. Qxd6 Qxc2 16. Bd3 Qxb2 17. Rab1 Qxa2 18. Rxb7 Qe6 19. Qxe6 fxe6 20. Rc1 Nd4 21. Rcb1 a5 22. Rb8+ Rxb8 23. Rxb8+ Kf7 24. Ra8 Nc6 25. Be4 Nb4 26. Rxa5 g6 27. Ra7+ Be7

[Assistant] Ra5


[System] You are a chess 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 e5 3. dxe6 fxe6 4. e4 d5 5. Nf3 Nc6 6. Nc3 d4 7. Ne2 Bd6 8. Ng3 Nge7 9. a4 O-O 10. Be2

[Assistant] Kh8


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

[User] 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O c5 5. d3 Nc6 6. Nbd2 d4 7. e4 dxe3 8. fxe3 Be7 9. e4 O-O 10. Nc4 Qc7 11. Be3 b5 12. Bf4 Qb7 13. Nd6 Bxd6

[Assistant] Bxd6


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

[User] 1. e4 Nf6 2. e5 Nd5 3. g3 d6 4. exd6 exd6 5. Bg2 Nb6 6. Nf3 Be7 7. O-O O-O 8. d3 Nc6 9. c4 d5 10. b3 Bf6 11. d4 dxc4 12. Be3 Nxd4 13. Bxd4 Bg4 14. Bxf6 Qxf6

[Assistant] Nbd2


[System] You are a 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/pR4pp/2p1qkr1/3ppb2/6P1/4P2P/P4P1Q/5RK1 b - - 0 26

[Assistant] Bxg4


[System] You are a chess 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 g6 3. e4 d6 4. Bg5 Bg7 5. Qd2 Nbd7 6. O-O-O O-O 7. Bh6 c5 8. dxc5 Bxh6 9. Qxh6 dxc5 10. Nf3 Qc7 11. Ng5 e6 12. Bb5 Ne5 13. h3 a6 14. f4 axb5 15. Nxb5 Qb8 16. Nd6 Ned7 17. e5 Rxa2

[Assistant] Nde4


[System] You are a chess 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 e6 3. cxd5 exd5 4. Nc3 Nf6 5. e3 Be7 6. Bd3 O-O 7. Nge2 b6 8. O-O Bb7 9. b4 Nbd7 10. b5 c5 11. bxc6 Bxc6 12. a4 Bb7 13. Ba3 a6 14. Bxe7 Qxe7 15. Nf4 Rac8 16. Qb3 Qd6 17. Rab1 Rfe8 18. Rfc1 h6 19. h3 Ne4 20. Nxe4 dxe4 21. Rxc8 Rxc8 22. Bc4 Qe7 23. Nd5 Qd6 24. Nc3 Qe7 25. Bd5 Rc7 26. Nxe4 Nf6 27. Nxf6+ Qxf6 28. Bxb7 Rxb7 29. Qd5 Rb8 30. a5 b5 31. Rc1 Qe7

[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] FEN: 1R1r1bk1/5p1p/4p1p1/2p5/2Q2B2/2P2P1P/P4PK1/4q3 b - - 10 29

[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 d6 2. e3 c6 3. f4 Nd7 4. Nf3 Qc7 5. Bd3 Ngf6 6. Qe2 e5 7. c4 e4 8. Bc2 exf3 9. Qxf3 Be7 10. Nc3 Nf8 11. e4 Ng6 12. e5 Nd7 13. O-O O-O 14. b3 dxe5 15. dxe5 f5 16. Bb2 Bc5+ 17. Kh1 Qa5 18. Rad1 Bb4 19. Ne2 Ba3 20. Bc3 Bb4 21. Ba1 Nc5 22. Ng3 Ne4 23. Nxe4 fxe4 24. Bxe4 Bf5 25. Bxf5 Rxf5 26. g4 Rxf4 27. Qxf4 Nxf4 28. Rxf4 Rf8 29. Rfd4 Bc3 30. Bxc3 Qxc3 31. Rd7 Qxe5 32. Rxb7

[Assistant] Qe4+


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

[User] FEN: r1b3k1/pppp1ppp/8/b3R3/2B2P2/8/P5PP/3q1RK1 w - - 0 18

[Assistant] Re8#


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

[User] 1. d4 c5 2. c3 g6 3. Bf4 Bg7 4. e3 Nf6 5. Nf3 O-O 6. Bc4 Nc6 7. Qc1 d5 8. Nbd2 cxd4 9. Bb5 dxc3 10. bxc3

[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. Nf3 d6 2. g3 e5 3. Bg2 f5 4. O-O Nf6 5. d3 Be7 6. c3 O-O 7. Nbd2 Kh8 8. e4 f4 9. d4 Nc6 10. Nc4 Nd7 11. dxe5 dxe5 12. Qd5 Qe8 13. Ncxe5 Ndxe5 14. Nxe5 Nxe5 15. Qxe5 f3 16. Bh1 c6 17. Bf4 Bg4 18. Rfe1 Qf7 19. Rad1 Rae8 20. Qc7 Bf6 21. Qxf7 Rxf7 22. h3 Bxh3 23. Bxf3 g5 24. Be3 g4

[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 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. Ne1 Ne8 10. Be3 h6 11. f3 f5 12. Nd3 Kh7 13. c5 Nf6 14. b4 a5 15. a3 axb4 16. axb4 Rxa1 17. Qxa1

[Assistant] fxe4


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

[User] FEN: 2R2r1k/p4ppP/1p1P4/nB1QP3/6Pq/P6r/8/2R3K1 b - - 2 35

[Assistant] Rg3+


[System] You are a chess 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. d4 cxd4 3. c3 dxc3 4. e4 Nc6 5. Bc4 d6 6. e5 dxe5 7. Qb3 e6 8. Nxc3 Bd7 9. Bg5 Qb6 10. Nb5 a6 11. Be3 Qd8 12. Nc3 Na5 13. Bb6 Nxb3 14. Bxd8 Nxa1 15. Ba5 Nc2+ 16. Kd2 Nd4 17. Nxe5 Nc6 18. Nxc6 Bxc6 19. f3 Nf6 20. Rd1 Bc5 21. Ke2 Ke7 22. a3 b6 23. b4 bxa5 24. bxc5 Rhd8 25. Rb1 Rab8 26. Rc1 Nd5 27. Ne4 f6 28. Bxa6 Rb2+ 29. Kf1 Ne3+ 30. Kg1 Rxg2+ 31. Kh1 Rc2 32. Re1 Bxe4 33. Rxe3 Bc6 34. Be2 Rdd2 35. Kg2 Rxe2+ 36. Rxe2 Rxe2+ 37. Kg3 Ra2 38. f4 Rxa3+ 39. Kg4 Ra4 40. h4 Rc4

[Assistant] Kh5


[System] You are a 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: 5b1r/Q2n1ppp/4Nk2/3p4/8/3P4/P2K1PPP/q1B1R3 b - - 0 21

[Assistant] Bb4+


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

[User] FEN: 1r1q3k/5rp1/6Rp/1p1p4/1PpP4/P5P1/5PK1/2Q4R w - - 1 31

[Assistant] Rgxh6+


[System] You are a 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: 5bk1/4P3/5PKp/8/8/7P/8/q7 w - - 0 54

[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: 7r/pp6/3Nqpk1/6p1/P3P3/2PQ4/6K1/6R1 b - - 2 40

[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] 1. d4 d5 2. Bg5 Nc6 3. e3 Bf5 4. c4 Nf6 5. cxd5 Qxd5 6. Nc3 Qa5 7. Bb5 e6 8. Nf3 Bb4 9. O-O O-O 10. Bxc6 bxc6 11. Rc1 Nd5 12. Ne2 Bd6 13. a3 Qb6 14. Qd2 Rab8 15. b4 Bg4 16. Bh4 Bxf3 17. gxf3 a5 18. bxa5 Qa6 19. Rc2 Ra8 20. Rfc1 Qxa5 21. Qxa5 Rxa5

[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. d4 Nf6 2. f3 e6 3. e4 c5 4. c3 cxd4 5. cxd4 d5 6. e5 Nfd7 7. Nc3 Nc6 8. Bb5 Qb6 9. Nge2 a6

[Assistant] Ba4


[System] You are a chess 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. Nc3 Nc6 4. d4 exd4 5. Nxd4 Bb4

[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 c6 2. d4 d5 3. Nc3 dxe4 4. Bc4 Bf5 5. f3 exf3 6. Nxf3

[Assistant] e6


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

[User] 1. d4 e6 2. e3 f5 3. Nf3 Nf6 4. Be2 Be7 5. O-O O-O 6. c3 d6 7. d5 Qe8 8. c4 e5 9. Nc3 Qg6 10. Nd2 a6 11. Bf3 b6 12. Be2 e4 13. b3 Nbd7 14. f3 exf3 15. Nxf3 Ne4 16. Nxe4 fxe4 17. Nd2 Ne5 18. Rxf8+ Bxf8 19. Qf1 Bf5 20. Qd1 Be7 21. Qc2 Rf8 22. Bb2 Bg5

[Assistant] Bxe5


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

[User] 1. e4 Nc6 2. d4 e6 3. c4 d5 4. cxd5 exd5 5. e5 Bb4+ 6. Nc3 Nge7 7. Nf3 Bg4 8. Be2 O-O 9. O-O f6 10. exf6 Rxf6 11. Bg5 Rf7 12. Re1 Qd7 13. Ne5 Nxe5 14. dxe5 Be6 15. a3 Ba5 16. b4 Bb6 17. Bh4 Nf5 18. Bg5 Ne7 19. Bh4 Nf5 20. Bg5 Nd4 21. Bh5 g6 22. Bf6 Raf8 23. Bf3 Nf5 24. Bg4 Ng7 25. Ne2 Ne8 26. Bxe6 Qxe6 27. Nf4 Qf5 28. Nxd5 c6 29. Ne3 Qe6 30. Ng4

[Assistant] h5