[System] You are a chess 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/ppp3pp/3pq3/5p2/1PP5/P3P1Q1/1BB2PPP/1n3RK1 w - - 0 19

[Assistant] Qxg7#


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

[User] FEN: 3R4/ppp1Q2p/2b3qk/5r1n/4p3/N1P2pPP/PPB2P2/5RK1 b - - 0 23

[Assistant] Nxg3


[System] You are a chess 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/pp2npBp/6q1/1p1N4/8/P7/1Q3PPP/3R2K1 w - - 0 25

[Assistant] Nxe7+


[System] You are a chess 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 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 c6 8. Qc2 h6 9. Bh4 Na6 10. a3 Nc7 11. Nf3 Ne6 12. O-O Bd7 13. b4 a6 14. Rab1 Nh5 15. Bxe7 Qxe7 16. Ne5 Rad8 17. a4 Bc8 18. b5 Qe8 19. bxa6 bxa6 20. Rfc1 c5 21. dxc5 Nxc5 22. Bh7+ Kh8 23. f4 d4 24. Rd1 dxc3 25. Rxd8 Qxd8 26. Bg6 fxg6 27. Nxg6+ Kg8 28. Qxc3 Qd3 29. Qxd3 Nxd3 30. Nxf8 Kxf8 31. Rb8 Nf6 32. Rxc8+ Ke7 33. Rc6 Nb4 34. Rb6 a5 35. Rb5 Nc2 36. Rxa5 Nxe3 37. Re5+ Kd6 38. Rxe3 Nd5 39. Rd3 Kc5 40. Rxd5+ Kxd5 41. g4 Kc4 42. f5 Kb4 43. h4 Kxa4 44. g5 hxg5 45. hxg5 Kb5 46. f6 Kc6 47. fxg7 Kd6

[Assistant] g8=Q


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

[User] 1. e4 c5 2. d3 e6 3. Nd2 Nc6 4. g3 b6 5. Bg2 Bb7 6. Ngf3 d6 7. O-O Qc7 8. c3 O-O-O 9. d4 Nf6 10. b4 cxb4 11. cxb4 Kb8 12. b5 Na5 13. Bb2 Nxe4 14. Rc1 Qd7 15. Nxe4 Bxe4 16. Re1 d5 17. Ne5 Qe7 18. Rxe4 dxe4 19. Bc3 f6 20. Ng4

[Assistant] Nc4


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3

[Assistant] c6


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

[User] 1. d4 Nf6 2. Bf4 e6 3. Bxc7 d5 4. Bxd8 Kxd8 5. Nf3 Nc6 6. e4 dxe4 7. Ne5 Nxe5 8. dxe5+ Nd5 9. Bc4 Bb4+ 10. c3 Bc5 11. O-O Ke7 12. Bb3 Bd7 13. Nd2 Bc6 14. c4 Nf4 15. Re1 Nd3 16. Nxe4 Nxb2 17. Qc2 Bd4 18. c5 Rhd8 19. Nd6 a5 20. Rad1 Bxc5 21. Qxb2 a4

[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] FEN: 5k1r/1p3ppp/p4nb1/3rR3/3q1P1Q/P4P2/1PP1R1KP/8 w - - 0 23

[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. Nf3 d6 2. e3 g6 3. Be2 Nf6

[Assistant] O-O


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

[User] 1. Nf3 d5 2. g3 Bf5 3. Bg2 c6 4. c4 Nf6 5. cxd5 cxd5 6. Qb3 Qb6 7. Nc3 Qxb3 8. axb3 Nc6 9. O-O e6 10. d3 a6 11. Bf4 Bb4 12. Ne5 Nxe5 13. Bxe5 O-O 14. e4 dxe4 15. dxe4 Bxc3 16. bxc3 Bxe4 17. Bxf6 Bxg2 18. Kxg2 gxf6 19. Rfd1 Rfd8 20. c4 Kf8 21. Kf3 Ke7

[Assistant] Kg4


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

[User] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Nxc6 bxc6 7. f3 g6 8. Be2 Bg7 9. O-O O-O 10. Be3 Qc7 11. Qd2 Rb8 12. b3 Nd7 13. Rad1 Nc5 14. Bxc5 dxc5 15. Kh1 Be5 16. Na4 Bxh2 17. f4 Bg3 18. Nxc5 e5 19. f5 Qe7 20. f6 Qxf6 21. Rxf6 Bh4 22. Rf3 Be7 23. Nd3 Be6 24. Nxe5 Rbd8 25. Qe1 Bd6 26. Ng4 h5 27. Nf6+ Kg7 28. Bd3 Be5 29. Qh4 Rh8

[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] FEN: r2q1r1k/6bp/pP2Q1p1/P1pBn1N1/5P2/8/1Pb3PP/R1B1K2R b KQ - 6 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] FEN: 5rk1/pp3ppp/2pq4/8/4b3/1BQ3P1/PP3P1K/3R1R2 b - - 1 22

[Assistant] Qh6+


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

[User] 1. Nf3 c6 2. g3 d5 3. Bg2 Nf6 4. O-O Bf5 5. c4 Bg6 6. cxd5 cxd5 7. d4 Nc6 8. Nc3 e6 9. Bf4 Bd6 10. Rc1 Bxf4 11. gxf4 O-O 12. e3 a6 13. Ne5 Rc8 14. Kh1 b5 15. a3 Na5 16. b4 Nc4 17. Nxc4 bxc4 18. f3 Qe7 19. Qe1 a5 20. bxa5 Qxa3 21. Ra1 Qb4 22. a6 Ra8 23. Qd2 Rfb8 24. Rfc1 Qd6 25. Qf2 Rxa6 26. Rxa6 Qxa6 27. Qg3 Qd6 28. Rg1 Rb3 29. Nd1 Rb1 30. Bh3 Qa3 31. f5 exf5 32. Bxf5 Qa8 33. Bxb1 c3 34. Bxg6 hxg6 35. Nxc3 Qa5 36. Rc1 Qa3 37. Qe1 Kh7 38. Kg2 Qe7 39. Rb1 Qe6 40. Nd1 Nh5 41. Rb2 Qf5 42. Nf2 Qg5+ 43. Kh1 Qf5 44. Qg1 Qxf3+ 45. Qg2 Qxe3 46. Rb1 Qxd4 47. Rg1 Qe3 48. Ng4 Qf4 49. Qxd5 f5 50. Qg2 fxg4 51. Qxg4 Qxg4 52. Rxg4 Kh6 53. Kg2 g5 54. Rc4 Nf4+ 55. Kg3 g6 56. Kf3 Nd5 57. Rf4

[Assistant] Nf6


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

[User] FEN: 5r2/p2q2k1/1pR3pb/1P1Pp1np/P3Pp2/5P1P/3Q2PK/2R5 b - - 3 28

[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. Nf3 f5 2. e3 e6 3. d4 Nf6 4. Bd3 Be7 5. O-O O-O 6. Re1 Nc6 7. Nbd2 d5 8. c3 Bd7 9. Ne5 Nxe5 10. dxe5 Ne4 11. f4 Bh4 12. Rf1 Bc6 13. Nxe4 fxe4 14. Be2 Be7 15. Bg4 Qd7 16. b3 Bb5 17. Re1 Bc5 18. a4 Bd3 19. g3 a5 20. Ba3 Bxa3 21. Rxa3 b6 22. Ra1 c5 23. Be2 c4 24. Bxd3 cxd3 25. Qd2 Rac8 26. Rec1 Rf5 27. b4 Rc4 28. bxa5

[Assistant] Qb7


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

[User] FEN: rnb1r1k1/p4p1p/2p2ppB/1p6/2B5/7P/PPPq1PP1/1K1RR3 w - - 0 18

[Assistant] Rxe8#


[System] You are a chess 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. Nf3 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. e3 Bg7 7. Be2 O-O 8. O-O c5 9. b3 cxd4 10. exd4 Nc6 11. Bg5 Bg4 12. Re1 Bxf3 13. Bxf3 Re8 14. Ne2 Nxd4 15. Nxd4 Qxd4 16. Qxd4 Bxd4 17. Rad1 e5 18. h4 Kg7 19. h5 f6 20. Be3 Rab8 21. Bxd4 exd4 22. Rxe8 Rxe8 23. Rxd4 Re7 24. a4 f5 25. g3 Kf6 26. Kg2 g5 27. a5 g4 28. Bd1 Nd7 29. Bc2 Ne5 30. Rd5 Ke6 31. Rc5 Rd7 32. b4 Rd2 33. b5 Nf3 34. Bxf5+ Kd6 35. Bxg4 Ne1+ 36. Kf1 Kxc5 37. Kxe1 Rd4 38. a6 bxa6 39. bxa6 Rxg4 40. f3 Rxg3 41. Kf2 Rg5 42. h6 Rh5 43. Ke3 Rxh6 44. f4 Rxa6 45. Ke4 Rf6 46. Ke5 Rf8 47. f5 a5 48. f6 a4 49. f7 Rxf7 50. Ke6 Rb7 51. Ke5 Rb4 52. Kf5 a3 53. Kf6 Kc4 54. Kg7 Kc3 55. Kh8 Rd4 56. Kg7 a2 57. Kh6 a1=Q 58. Kg5 Qd1 59. Kf5 Qe2 60. Kf6 Rd3 61. Kg7 h5 62. Kh8 h4

[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. e4 e6 2. Nc3 d5 3. Nf3 Nf6 4. e5 Nfd7 5. d4 Be7 6. b3 a6 7. a4 c5 8. Ba3 cxd4 9. Bxe7 Qxe7 10. Qxd4 Nc6 11. Qf4 O-O 12. Bd3 f6 13. exf6 Rxf6 14. Qh4 Rh6 15. Qxe7 Nxe7 16. O-O-O Nc6 17. Rde1 Rf6 18. h4 h6 19. Re2 Nc5 20. Rhe1 Nxd3+ 21. cxd3 Bd7 22. Kc2 Raf8 23. Kb2 Nb4 24. Rd1 Rf4 25. Ne5 Bc8 26. g3 Rxf2 27. Rdd2 Rxe2 28. Rxe2 Rf5 29. Ng6 Nxd3+ 30. Ka3 Kf7 31. Nh8+ Ke7 32. g4 Rf3 33. Ng6+ Kd6 34. Nd1 Nc1 35. Kb2 Nxb3 36. Ne5 Rh3 37. Ne3 Nd4 38. Re1 Kxe5 39. Nc2+ Kd6 40. Nxd4 Rh2+ 41. Kc1 b5 42. Nf3 Rh3 43. Ne5 bxa4 44. Nf7+ Ke7 45. Ne5 Bd7 46. Nc6+ Bxc6 47. Kb2 Kd6 48. Rd1 Rh2+ 49. Ka3 Rxh4 50. Kb4 Rxg4+ 51. Ka5 Rc4 52. Kb6 Rc5 53. Ka7 Rb5

[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. Nc3 d6 3. f4 e6

[Assistant] Nf3


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

[User] 1. d4 e5 2. e3 exd4 3. exd4 d6 4. Nf3 Nf6 5. Bd3 Be7 6. O-O Bg4 7. c3 Nbd7 8. h3 O-O 9. hxg4 Nxg4 10. Ng5 Bxg5 11. Qxg4 Bxc1 12. Rxc1 Nf6 13. Qh4 d5 14. Nd2 g6 15. Nf3 Re8

[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. Nf3 e6 2. d4 Nf6 3. Nc3 c5 4. Bg5 cxd4 5. Nxd4 h6 6. Bxf6 Qxf6 7. Nf3 Bb4 8. Qd4 Qxd4 9. Nxd4 Bxc3+ 10. bxc3 a6 11. e4 Nc6 12. Bc4 Nxd4 13. cxd4 d6 14. c3 Bd7 15. Bd3 b5 16. O-O Rc8 17. Rac1 Ke7 18. Rfd1

[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. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. Nge2 Nf6 5. d4 c6 6. Bf4 Qd8 7. Qd2 Bf5 8. h3 h6 9. O-O-O e6 10. Ng3 Bh7 11. Bd3 Bxd3 12. Qxd3 Bd6 13. Be5 Qc7 14. f4 Nbd7 15. Nge4 Bxe5 16. fxe5 Nxe4 17. Nxe4 O-O 18. Nd6 c5 19. Rhf1 Rad8 20. Kb1 cxd4 21. Qxd4 Nb6 22. Qf4 Nd5 23. Qf3 b5 24. c3 Rb8 25. Rxd5 exd5 26. Qxd5 Qe7 27. Rf5 Qe6 28. Qf3 b4 29. c4 a5 30. Qd5 a4 31. Rf3 b3

[Assistant] a3


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

[User] 1. g3 e6 2. Bg2 d5 3. Nf3 Nf6 4. O-O Be7 5. d3 O-O 6. Bg5 c5 7. Nbd2 Nc6 8. e4 h6 9. Bxf6 Bxf6 10. exd5 exd5 11. c3 Bg4 12. h3 Bh5 13. g4 Bg6 14. Ne1 Rfe8 15. f4 Rxe1 16. Rfxe1 Bxd3 17. Nf3 Be4 18. Ne5 Qc7 19. Bxe4 dxe4 20. Nxc6 Qxc6 21. Qe2 Re8 22. Rad1 b5 23. Qe3 b4

[Assistant] Rd2


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

[User] FEN: r2q1rk1/pp2ppbp/2p1b1p1/2P5/3n4/5NP1/PB2PPBP/R1Q2RK1 w - - 0 17

[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. e4 Nf6 2. Nc3 c5 3. d3 d6 4. Nge2 Nc6 5. h3 g6 6. g4 Bg7 7. Bg2 e5 8. O-O h5 9. f3 hxg4 10. hxg4 Nxg4 11. fxg4 Qh4 12. Be3

[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. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O Ne7 7. Nbd2 h6 8. Nb3 Bg4 9. Be3 Rc8 10. h3 Bh5 11. c3 Bxf3 12. Bxf3 Nf5 13. Qd2 Be7 14. Rac1 Bg5 15. Bxg5 Qxg5 16. Qxg5 hxg5 17. Bg4 Nh6 18. Be2 Ke7 19. f4 gxf4 20. Rxf4 c5 21. Bb5 cxd4 22. Bxd7 Kxd7 23. Nxd4 Rc4 24. Rcf1 a6 25. g4 g6 26. g5 Nf5 27. Nxf5 Rxf4 28. Rxf4 gxf5 29. Kg2 Ke7 30. Kg3 Kf8 31. h4 Kg7 32. Rb4 b5 33. a4 bxa4 34. Rxa4 Rb8 35. b4 Rb6 36. h5 Rc6 37. Ra3 Rc4 38. Kf3 Rh4 39. h6+ Kg6 40. Rxa6 Rh3+ 41. Kf4 Rxc3 42. Rb6 Rc4+ 43. Kf3 Kxg5 44. Rb7 Kg6 45. b5 Rb4 46. h7 Kxh7 47. Rxf7+ Kg6 48. Rb7 Kg5 49. b6 Rb3+ 50. Ke2 Kf4 51. Rb8 Kxe5 52. b7 f4 53. Kf2 d4 54. Ke2 Ke4 55. Re8 Rb2+ 56. Kd1 Rxb7 57. Rxe6+ Kd3 58. Ke1 f3 59. Kf2 Rf7 60. Re8 Kd2 61. Rd8 d3 62. Rc8 Kd1 63. Rc6 d2 64. Rc5 Rh7 65. Kxf3 Rh3+ 66. Kf2 Rh2+ 67. Kf3 Rh7 68. Rc8 Rf7+ 69. Ke3 Ke1 70. Rd8 Re7+ 71. Kf3 d1=Q+ 72. Rxd1+ Kxd1 73. Kf4 Kd2 74. Kf5 Kd3 75. Kf6 Re1 76. Kf5 Kd4 77. Kf6 Kd5 78. Kf7 Kd6 79. Kg6 Ke6 80. Kg5 Rf1 81. Kg4 Ke5 82. Kg3 Ke4 83. Kg2 Rf8 84. Kg3 Rf7 85. Kg2 Ke3 86. Kg1 Ke2 87. Kg2 Rg7+ 88. Kh3 Kf3 89. Kh4 Rg8 90. Kh5 Kf4 91. Kh6 Kf5 92. Kh7 Rg1 93. Kh8 Kf6 94. Kh7 Kf7 95. Kh6 Rg4 96. Kh5 Rg8 97. Kh6 Kf6 98. Kh5 Rg2 99. Kh4 Kf5 100. Kh3

[Assistant] Rg8


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

[User] FEN: 5b2/6pk/1r4p1/1p4R1/3p4/8/1PB2PPK/r7 w - - 5 39

[Assistant] Rh5+


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

[User] 1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3

[Assistant] Bg7


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

[User] 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. c3 Nc6 7. Ndf3 Qb6 8. g3 Be7 9. Bh3 f5 10. Ne2 g6 11. Kf2 Bf8 12. Bf1 Bg7 13. Kg2 O-O 14. h3 a5 15. g4 a4 16. g5 cxd4 17. cxd4 Na5 18. h4 Nc4 19. h5 Kf7 20. Rb1 Na3 21. Ra1 Nc4 22. Qc2 Qa5 23. Bd2 Nxd2 24. Qxd2 b5 25. Qxa5 Rxa5 26. Rc1 Nb6 27. Rc7+ Kg8 28. Nc3 Nc4 29. b3 axb3 30. axb3 Ra3 31. bxc4 Rxc3 32. c5 b4

[Assistant] Be2


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

[User] 1. d4 c5 2. Nf3 cxd4 3. Nxd4 Nc6 4. c4 g6 5. Nc3 Bg7 6. e3 Nf6 7. g3 O-O 8. Bg2 Nxd4 9. exd4 d5 10. cxd5 Bg4 11. Qb3 b6 12. O-O Rc8 13. h3 Bf5 14. Re1 Qd7 15. Kh2 h5 16. Bf4 h4 17. g4 Bd3 18. Rad1 Ba6 19. Qa3 Bb7 20. Qxa7 Ra8 21. Qxb6 Ra6 22. Qb5 Qxb5 23. Nxb5 Rxa2 24. Rxe7 Bxd5 25. Nc3 Bxg2 26. Nxa2 Bf3 27. Rd2 Nd5 28. Bd6 Nxe7 29. Bxe7 Re8 30. Rd3 Be4 31. Re3 Rxe7 32. Nc3 f5 33. f3 Bxd4 34. Re2 Be5+ 35. Kg2 Bxc3 36. bxc3 Bxf3+ 37. Kxf3 Rxe2 38. Kxe2 fxg4 39. hxg4 g5 40. c4 Kf7 41. Kf3 Ke6 42. Ke4 Kd6 43. Kf5 Kc5 44. Kxg5 h3 45. Kh4 h2 46. g5 h1=Q+ 47. Kg4 Qg2+ 48. Kf5 Kxc4 49. g6 Kd5 50. Kf6 Kd6 51. Kf7 Kd7 52. g7 Qf3+ 53. Kg8 Qg4 54. Kf8 Qf5+ 55. Kg8 Ke7 56. Kh8 Qh5+

[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] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Kh1 Nxd4

[Assistant] Qxd4


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 e6 5. Be2 Nf6 6. O-O c6 7. d4 Nbd7 8. a3 Be7 9. Bg5 h6 10. b4 Qc7 11. Bh4 O-O 12. Bg3 Bd6 13. Ne5 Nxe5 14. dxe5 Bxe5 15. f4 Bxc3 16. Rb1 Rd8 17. f5

[Assistant] Rxd1


[System] You are a chess 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. Bd3 O-O 6. Nge2 c5 7. d5 a6 8. a4 e6 9. O-O exd5 10. cxd5 Nbd7 11. Ng3 h5 12. Bg5 Qc7 13. f4

[Assistant] Qb6


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

[User] FEN: r1b1k1r1/1p3p2/p2Pp3/3p4/PP2q3/2Q1B3/3K2p1/5R1R w q - 0 27

[Assistant] Rxf7


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

[User] FEN: 1r2k3/p1q1p1r1/3N2p1/3B1b2/2P5/1P3nPp/P2Q1P1P/4RR1K b - - 0 31

[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. c3 d6 2. d4 Nd7 3. e3 g6 4. f4 Bg7 5. Nf3 h6 6. Bd3 e5 7. fxe5 dxe5 8. e4 Ne7 9. d5 O-O 10. c4 Kh7 11. O-O f5 12. Nc3 f4 13. c5 g5 14. b4 a5 15. d6 Ng6 16. dxc7 Qxc7 17. Nd5 Qc6 18. Bd2 axb4 19. Bxb4 Nf6 20. Bc4 Be6 21. Nxf6+

[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. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. c3 Na5 8. Nbd2 Nxc4 9. Nxc4 Be6 10. Ne3 Re8 11. c4 h6 12. b3 Bf8 13. Bb2 g6 14. Qc2 Bg7 15. d4 exd4 16. Nxd4 Bd7 17. h3 Nxe4 18. Nd5 Nf6 19. Rxe8+ Bxe8 20. Nf4 Bd7 21. Re1 c5 22. Nb5 Bf5 23. Qd1 d5 24. Bxf6 Bxf6 25. Nxd5 Bg7 26. Ndc7 Qxd1 27. Rxd1 Rc8 28. Nd5 a6 29. Ne7+ Kh7 30. Nxc8 axb5 31. Nd6 Bc2

[Assistant] Rd2


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

[User] FEN: 3r1k2/p6p/1p2Q1rP/4B3/bP4P1/P4p2/4qP2/K1R5 w - - 1 35

[Assistant] Bd6+


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

[User] 1. e4 c6 2. Nc3 d6 3. d4 Nd7 4. f4 Qc7 5. Nf3 e6 6. e5 d5 7. Bd3 g6 8. Ng5 Nh6 9. h4 Nf5 10. h5 Nxd4 11. hxg6 fxg6 12. Bxg6+ hxg6 13. Rxh8 c5 14. Qg4 Nb6 15. Nh7 Nd7 16. Qxg6+ Kd8

[Assistant] Nxf8


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

[User] FEN: 8/2p5/p1p1k3/PP3p2/2PP1P1p/5KpP/8/8 b - - 0 37

[Assistant] cxb5


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

[User] 1. Nf3 c6 2. g3 Nf6 3. Bg2 d6 4. O-O e6 5. d4 Be7 6. c4 O-O 7. Nc3 d5 8. Re1 dxc4 9. e3 Nbd7 10. b3 Nb6 11. bxc4 Nbd5 12. c5 Nxc3 13. Qc2 Ncd5 14. e4 Nb4 15. Qc4 Na6 16. e5 Nd5 17. Nd2 f5 18. f4 b5 19. Qf1 Nac7 20. a4 a6 21. axb5 axb5 22. Bb2 Rxa1 23. Bxa1 b4 24. Nf3 Nc3 25. Rb1 Ne4 26. Rxb4 Nd5 27. Rb1 Bd7 28. Rd1 Qc7 29. Nd2

[Assistant] Nec3


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

[User] FEN: 8/2K2n2/3p4/1P1Pk3/8/8/8/8 w - - 1 52

[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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 Na6 7. O-O

[Assistant] Bg4


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Be7 7. Re1 d6 8. c3 O-O 9. d4 Bg4

[Assistant] h3


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

[User] 1. c4 d6 2. Nc3 g6 3. d4 Bg7 4. Nf3 Nf6 5. e4 O-O 6. Be2 c5 7. d5 e5 8. O-O Na6 9. a3 Nc7 10. Be3 a6 11. h3

[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: 2rr3k/pp3p1P/1q2p1pB/4P3/3np1P1/PP5Q/5P2/R3K2R w KQ - 3 26

[Assistant] Bg5


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Ne2 O-O 6. a3 c5 7. axb4 cxb4 8. Na2 dxc4 9. Nxb4 a5 10. Nf4 b5 11. Na2 Bb7 12. Nc3 Qd7 13. Be2 Rc8 14. O-O b4 15. Na4 Qc6 16. Bf3 Qc7 17. Nc5 Bxf3 18. Qxf3 Nc6 19. Bd2 e5 20. Nd5 Nxd5 21. Qxd5

[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] 1. g3 e6 2. Bg2 d5 3. Nf3 c6 4. O-O Nf6 5. d4 Bd6 6. c4 dxc4 7. Nc3 O-O 8. e4

[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. d4 d5 2. Nf3 Nf6 3. Bg5 c5 4. Bxf6 gxf6 5. e3 e6 6. c3 cxd4 7. exd4 Nc6 8. Nbd2 Bd6 9. g3 Bc7 10. Bg2 Qd6 11. Qe2 h5 12. O-O-O Bd7 13. Rhe1 O-O-O 14. Kb1 Na5 15. Nb3 Qa6 16. Qxa6 bxa6 17. Nc5 Nc4 18. Nxa6 Bb6 19. Nb4 a5 20. Nd3 e5 21. dxe5 fxe5 22. Nfxe5 Bf5 23. Nxf7 Rdf8 24. Nxh8 Rxh8 25. f3 Ne3 26. Re2 Nxd1 27. f4 Bxd3+ 28. Kc1 Bxe2 29. Kd2 Bg4 30. Bxd5 Rd8 31. c4 Bc5 32. b3 Bb4+

[Assistant] Kd3


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

[User] FEN: 2Q3R1/pp3p2/2p2krp/4pp2/2P1q3/6PK/P1P4P/8 w - - 2 32

[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] FEN: 8/8/6p1/Pk2B3/1P3P2/1KPpr3/8/8 w - - 0 58

[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 d6 2. e4 Nf6 3. Nc3 c6 4. f4 Qa5 5. Bd3 e5 6. dxe5 dxe5 7. f5 Bc5 8. Nf3 Ng4 9. h3 Nf2 10. Qe2 Nxh1 11. Nxe5 Nd7 12. Nc4 Qc7 13. e5 O-O 14. Bf4 Bf2+ 15. Kd2 Bg3 16. Qg4 Bxf4+ 17. Qxf4 f6 18. Rxh1 Nxe5 19. Re1 Re8 20. g4 Kh8 21. h4 Nxc4+ 22. Qxc4 Rxe1 23. Kxe1 Qg3+ 24. Kd1 Qf3+ 25. Be2 Qh1+ 26. Kd2 Bd7 27. Qd4 Rd8 28. g5 Qh2 29. gxf6 Qc7 30. fxg7+ Kg8 31. Bc4+

[Assistant] Be6


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

[User] FEN: 3r3k/3R3p/p4pp1/1p2pN2/8/P1P3QP/1q4PK/8 b - - 0 37

[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: r6r/pp2pp1k/3p2pP/2pP1P2/3n4/3P4/qPP2Q2/2K3RR w - - 0 24

[Assistant] fxg6+


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

[User] FEN: 8/8/1p1k3K/p1pP2p1/P1P3P1/8/8/8 b - - 0 43

[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. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 g5 6. Bg3 Ne4 7. Qc2 f5 8. e3 b6 9. Bd3 Bb7 10. f3 Nxg3 11. hxg3 Qf6 12. Ne2 Nc6 13. O-O-O O-O-O 14. a3 Be7 15. f4 Rdg8 16. Rhg1 Kb8 17. d5 Nd8 18. Nd4 Nf7 19. Be2 Nd6 20. dxe6 dxe6 21. Bf3 Nxc4

[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. g3 Nc6 2. Bg2 d5 3. Nf3 Nf6 4. O-O g6 5. d4 Bg7 6. c4 O-O 7. cxd5 Nxd5 8. Nc3 Nb6 9. e3 e6 10. a3 h6 11. b4 Kh7 12. Bb2 Nc4 13. Bc1

[Assistant] e5


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

[User] 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c3 Nf6 5. Nd2 Nc6 6. Ngf3 Bg4 7. Bd3 e6 8. h3 Bd6 9. hxg4 Nxg4 10. Qe2

[Assistant] Qc7


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

[User] FEN: r5rk/pp3p2/2p4p/2P2Nq1/1P2Pp2/P2RbP2/2Q4P/3R3K b - - 6 28

[Assistant] Qg1+


[System] You are a chess 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/pp4pp/2p1np2/2Pp4/q3rP2/PN1Q2P1/4RB1P/R5K1 b - - 11 32

[Assistant] Rxe2


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

[User] FEN: r2q1rk1/pbp1bppp/1p2p3/8/2nN4/4B3/PPBQ1PPP/R4RK1 w - - 0 15

[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. Nf3 Nf6 2. c4 e6 3. d4 d5 4. Bg5 Be7 5. e3 O-O 6. Nc3 c6 7. a3 Nbd7 8. Qc2 h6 9. Bh4 b6 10. Rd1 Ba6 11. cxd5 Bxf1 12. Kxf1 cxd5 13. h3 Rc8 14. Qb3 Ne4 15. Bxe7 Qxe7 16. Nxe4 dxe4 17. Nd2 f5 18. Ke2 Nf6 19. Rc1 f4 20. exf4 Nd5 21. g3 Rcd8 22. Nxe4

[Assistant] Kh7


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

[User] 1. g3 g6 2. Bg2 Bg7 3. Nf3 Nf6 4. O-O O-O 5. d4 c6 6. c4 d5 7. c5 b6 8. cxb6 axb6 9. Nc3 Ne4 10. Bg5 Nxc3 11. bxc3 Bf5 12. e3 Be4 13. Nd2 Bxg2 14. Kxg2 Nd7 15. e4 dxe4 16. Nxe4 Nf6 17. Nxf6+ Bxf6 18. Bxf6 exf6 19. Qf3 Qd5 20. a4 f5 21. Qxd5 cxd5 22. Rfb1 Rfc8 23. Rb3 Rc4 24. Raa3 Kg7 25. Rxb6 Raxa4 26. Rxa4 Rxa4 27. Rc6 Ra3 28. Rc5 g5 29. h3 g4 30. h4 Kg6 31. Kf1 h5 32. Ke2 Ra2+ 33. Ke3 Ra1 34. Rxd5 Re1+ 35. Kd2 Rf1 36. Ke2 Rc1 37. Rc5 f6 38. Rc8 f4 39. gxf4 Kf5 40. d5 Kxf4 41. d6 Rc2+ 42. Kd3 Rc1 43. Kc4

[Assistant] Rd1


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

[User] 1. d4 d5 2. Nf3 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. c4 b6 7. Nc3 Bb7 8. Ne5 Nbd7 9. Bg5 c5 10. dxc5 Nxc5

[Assistant] cxd5


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Nf6 7. Bg2 Nc6 8. Nxc6 bxc6 9. O-O d5 10. exd5 cxd5 11. Re1 Be7 12. Bf4 Qb6 13. Qd2 O-O 14. Rad1 Bb7 15. Be5 Rac8 16. Bd4 Qc7 17. Be5 Qb6 18. Bd4 Qc6 19. Rc1 Rfd8 20. Ne2 Qc7 21. c3 e5 22. Be3 h6 23. f4 Bd6 24. fxe5 Bxe5 25. Bf4 Ne4 26. Qe3 Bxf4 27. Nxf4 Qc4 28. b3 Qc5 29. Qxc5 Rxc5 30. Nxd5 Bxd5 31. Bxe4 Bxe4 32. Rxe4 Rd2 33. c4 Rxa2 34. Rf1 Rb2 35. Re8+ Kh7 36. Rxf7 Rxb3 37. Ree7 Rg5 38. c5 Rc3 39. Ra7 Rcxc5 40. Rxa6 Rc2 41. Rf2 Rxf2 42. Kxf2 Rg6 43. Rxg6 Kxg6 44. Kf3 Kf5 45. g4+ Ke5 46. Kg3 g5 47. h4 Ke4 48. hxg5 hxg5 49. Kh2 Kf3 50. Kg1 Kg3 51. Kh1 Kxg4 52. Kg2 Kf4 53. Kf2 g4 54. Kg2 g3 55. Kg1

[Assistant] Kg4


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

[User] 1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Bc4 Be7 7. Ne2 O-O

[Assistant] O-O


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

[User] FEN: 2r3k1/pp2n3/1q2p1p1/3pPnN1/3r2B1/P4Q2/1P3P2/3RR1K1 w - - 0 25

[Assistant] Rxd4


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

[User] FEN: r5k1/q4p1p/2bBp1n1/3pP1N1/1ppP4/6P1/5PK1/rBQ1R3 w - - 0 29

[Assistant] Nxh7


[System] You are a chess 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 Nf6 3. e4 c6 4. e5 d5 5. exf6 exf6 6. cxd5 Bg7 7. Nc3 cxd5 8. Qa4+ Nc6 9. Qb3 O-O 10. Be3 f5 11. O-O-O f4 12. Bxf4 Nxd4 13. Rxd4 Bxd4 14. Qxd5 Qf6 15. Nge2 Bxc3 16. bxc3 Be6 17. Qe5 Qe7 18. Bh6 Qa3+ 19. Kd2 Rfd8+ 20. Nd4 Qxa2+ 21. Kd3 f6 22. Qxe6+ Qxe6 23. Kd2 Rxd4+ 24. cxd4 g5 25. Bd3 Rc8 26. Re1 Qa2+ 27. Ke3 Qa3 28. Rd1 Re8+

[Assistant] Kf3


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

[User] FEN: 8/8/1k2p2p/5p1p/5PP1/5K2/8/8 w - - 0 56

[Assistant] g5


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

[User] 1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 Nf6 5. Nf3 c6 6. Bd3 Be7 7. O-O Be6 8. Ng5 Nbd7 9. Re1 c5 10. Nxe6 fxe6 11. Rxe6 cxd4 12. Nxd5 Nxd5 13. Qh5+ g6 14. Qxd5 Nb6 15. Bb5+ Kf8 16. Bh6+

[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. b4 e5 2. Bb2 f6 3. e4 Bxb4 4. Bc4 Ne7 5. Qh5+ g6 6. Qh4 Nec6 7. a3 Ba5 8. Ne2 d6 9. O-O Qe7 10. Nbc3 Bxc3 11. Nxc3 Be6 12. Nd5 Bxd5 13. Bxd5 Nd7 14. c3 Nb6 15. Ba2 O-O-O 16. d4 Na4 17. Rab1 Nxb2 18. Rxb2 exd4 19. cxd4 Nxd4 20. Rc1 Kb8 21. Qf4 Qe5 22. Qd2 c5 23. Rcb1 b6 24. Qa5 Qxe4 25. Rxb6+ axb6 26. Rxb6+ Qb7 27. Bd5 Ne2+ 28. Kf1 Rd7 29. Kxe2 Re8+ 30. Kd3 Re5 31. Bxb7 Rxb7 32. Rxb7+ Kxb7 33. Qb5+ Kc7 34. Qa6 Kd7 35. a4 Rd5+ 36. Kc4 Rd4+ 37. Kc3 Rb4 38. Qa7+ Ke6 39. a5 d5 40. a6 d4+ 41. Kc2 Rc4+ 42. Kd3 Rc3+ 43. Kd2 c4 44. Qxd4

[Assistant] Rd3+


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

[User] FEN: 3N1rk1/p4pp1/6b1/2P5/P1QBp1n1/6b1/4PPBq/R2R1K2 b - - 1 27

[Assistant] e3


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

[User] 1. g3 h5 2. Nf3 d5 3. Bg2 c6 4. c4 Nf6 5. d4 Bf5 6. O-O Bxb1 7. Rxb1 e6 8. Qc2 Nbd7 9. Bf4 Ne4 10. h4 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] FEN: 6r1/k1q2p2/Pbpr4/4p3/4P3/1Q4Pp/1PP1N2B/5R1K w - - 1 32

[Assistant] Rxf7


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

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bf4 dxc4 6. a4 Bb4 7. Qc2 Nd5 8. Bd2 Nd7 9. e4 Nxc3 10. Bxc3 Bxc3+ 11. bxc3 e5 12. dxe5 Qe7 13. Bxc4 Nxe5 14. Nxe5 Qxe5 15. O-O O-O 16. Rad1 Be6 17. Bxe6 Qxe6 18. Qb2 b6 19. f3 Rad8 20. Qb4 c5 21. Qb5 h6 22. a5 g6 23. axb6 axb6

[Assistant] Rxd8


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

[User] FEN: 8/2p5/5p2/p1p2k2/2P2P2/1P2K3/P7/8 w - - 1 42

[Assistant] Kf3


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

[User] FEN: 3r1r2/1pp1bppk/p3p2p/7Q/4q3/P3B1P1/1P3P1P/R3R1K1 w - - 0 20

[Assistant] Bc5


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 Be7 6. e3 h6 7. Bh4 O-O 8. Bd3 c5 9. dxc5 Nc6 10. Nge2 Be6 11. O-O Nd7 12. Bxe7 Qxe7 13. Nf4 Nxc5 14. Ncxd5 Bxd5 15. Nxd5 Qe5 16. Rc1 Nxd3 17. Qxd3 Rad8 18. e4 f5 19. Qb3 Nd4 20. Qxb7 Ne2+

[Assistant] Kh1


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

[User] 1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 Nf6 5. Nc3 Nxd5 6. Bc4 Nb6 7. Bb3 Bf5 8. Nf3 e6 9. d4 Be7 10. O-O Nc6 11. h3 O-O 12. Be3 Nb4 13. Qe2 N4d5 14. Rad1 Nxc3 15. bxc3 Nd5 16. c4 Nxe3 17. Qxe3 Rc8 18. Ne5 Bf6 19. g4 Bg6 20. Nxg6 hxg6 21. f4 Qd7 22. g5 Be7 23. d5 exd5 24. Rxd5 Qc7 25. Rfd1 Rfd8 26. Rxd8+ Rxd8 27. Rxd8+ Qxd8 28. Kg2 b6 29. Qe4 Bc5 30. Qd5 Qxd5+ 31. cxd5 Kf8 32. Kf3 Ke7 33. Ke4 Kd6 34. h4 f6 35. f5

[Assistant] gxf5+


[System] You are a chess 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 Nf6 2. Ne2 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d3 c6 7. c4 Nbd7 8. Nbc3 e5 9. d4 Qe7 10. d5 cxd5 11. cxd5 a6 12. e4 b5

[Assistant] Be3


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

[User] FEN: 8/p7/1p6/4N1p1/6P1/6K1/k5P1/8 b - - 1 56

[Assistant] Kb3


[System] You are a chess 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. g3 d5 3. Bg2 Bf5 4. d3 e6 5. Nf3 h6 6. O-O Be7 7. Qe1 O-O 8. e4 Bh7 9. e5 Nfd7 10. Bd2 c5 11. Qe2 Nc6 12. Rfe1 Rb8 13. Nd1 b5 14. h4 a5 15. Bf4 Re8 16. Ne3 Bf8 17. Bh3 c4 18. d4 Nb4 19. a3 Nc6 20. Ng4 b4 21. Qe3 Kh8 22. Nxh6 gxh6 23. Bxh6 f5 24. exf6 Nxf6 25. Bxf8 Rxf8 26. Qxe6 Ne4 27. Ng5 Nxg5 28. hxg5 Rc8 29. Qxc8 Qxc8 30. Bxc8 Rxc8 31. c3 Rg8 32. f4 Be4 33. Kf2 Kg7 34. axb4 axb4 35. Ra6 Rc8 36. Rea1 Kg6 37. Rb6 Kf5 38. Raa6 Ne7 39. Rb7 Re8 40. Rf6+ Kg4 41. Re6 Nf5 42. Rxe8 Nxg3 43. g6 Bf5 44. g7 Ne4+

[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] FEN: r1bq2k1/pp3ppp/2p2n2/4r3/8/P2BP1P1/1PQN1PP1/R4RK1 b - - 1 15

[Assistant] Rd5


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

[User] 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. a4 Nf6 5. Bxd7+ Qxd7 6. d3 Nc6

[Assistant] O-O


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

[User] FEN: 6k1/Q4pp1/7p/3pP3/p1r5/P7/1P4qP/K3R3 w - - 0 32

[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] FEN: 8/p1k4p/6p1/2PpNp2/2r2P2/4K1B1/8/8 w - - 1 71

[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. b3 c5 2. Bb2 Nf6 3. c4 g6 4. Nc3 Bg7 5. Nf3 O-O 6. d3 Nc6 7. Qc1 d5 8. Nxd5 Nxd5 9. Bxg7 Kxg7 10. cxd5 Qxd5 11. e3 Nb4 12. Qc3+ Kg8 13. a3 Nc6 14. Be2 Be6 15. O-O Qxb3 16. Qxb3 Bxb3 17. Rfb1 Be6 18. Rxb7 Rab8 19. Rab1 Rxb7 20. Rxb7 Rb8 21. Rxb8+ Nxb8 22. Ne5 Nd7 23. Nxd7 Bxd7 24. d4 cxd4 25. exd4 Kg7 26. f3 Kf6 27. Kf2 Ke6 28. Ke3 Kd6 29. Bc4 Be6 30. Bd3 Bd5 31. Be4 e5 32. dxe5+ Kxe5 33. Bd3 Kd6 34. Kd4 f6 35. Be2 g5 36. g3 h6 37. f4 Be6 38. fxg5 hxg5 39. Bd3 g4 40. Be4

[Assistant] a5


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Be2 Qd6 4. Bf3 Nf6 5. d4 c5 6. c4

[Assistant] Qxd4


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

[User] FEN: k3r2r/1p3pp1/pqpb4/3p2Bn/2PP3Q/1P5P/P2N2P1/R4R1K w - - 1 26

[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: r3r3/ppqn3k/2p2pp1/8/2QPp3/4P2P/PPP3P1/R4RK1 w - - 0 23

[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 c5 2. e3 e6 3. Nf3 Nf6

[Assistant] Be2


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 O-O 6. Nge2 Nc6 7. O-O Nd7 8. Be3

[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: r5k1/pp1b1p1p/3p1n2/1BpPb1p1/4P3/2N2PP1/PP4K1/R3R3 b - - 2 22

[Assistant] Bxc3


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

[User] FEN: 8/8/8/7p/2P3p1/5P1k/8/5K2 w - - 2 43

[Assistant] Kg1


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

[User] FEN: 7k/R6p/p1r1Npp1/1p2p3/8/n3P1P1/5PKP/8 w - - 4 30

[Assistant] Ra8+


[System] You are a chess 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 d5 3. Nxe5 Qe7 4. d4 Nd7 5. exd5 Nxe5 6. dxe5 Qxe5+ 7. Qe2 Bd6 8. Qxe5+ Bxe5 9. c3 Nf6 10. Bc4 O-O 11. O-O a6 12. Bg5 h6 13. f4 Bxc3 14. Bxf6 Bxf6 15. Nc3 b5 16. Bb3 Bb7 17. Ne4 Bxb2 18. Rab1 Bd4+ 19. Kh1 Rad8 20. Rfd1 Bb6 21. Rbc1 f5 22. Nd2 Rd6 23. Nf3 Rfd8 24. Ne5 Bxd5 25. Bxd5+ Rxd5 26. Rxd5 Rxd5 27. Re1 Rd2 28. g3 Rxa2 29. Nc6 a5 30. Ne7+ Kf7 31. Nxf5

[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: 3r2k1/R4pp1/6qp/3pP1n1/2pQ4/2P5/5PPP/3R2K1 b - - 0 25

[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. e4 d5 2. exd5 Nf6 3. Nf3 Qxd5 4. Nc3 Qa5

[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/Pk6/3n2p1/1pK5/5P2/8/5B2/8 b - - 10 55

[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: r2q1rk1/pppb1p2/5n2/3p4/8/2P4P/P1P3P1/R1BQ1RK1 w - - 0 17

[Assistant] Bg5


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

[User] FEN: 1r1r2k1/3qbppp/p3p3/1p6/2p1QP2/2N1BNPb/P1P2R1P/2R3K1 b - - 11 25

[Assistant] f5


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

[User] 1. c4 e5 2. g3 d6 3. Bg2 c6 4. Nc3 Be6 5. d3 f5 6. b3 Nf6 7. e4 fxe4 8. dxe4 Be7 9. Nge2 O-O 10. O-O Nbd7 11. h3 Qe8 12. Be3 Qg6 13. g4 Nc5 14. Ng3 h5 15. gxh5 Nxh5 16. Qxh5 Qxh5 17. Nxh5 Nd3 18. Ng3 Nf4 19. Nf5 Bxf5 20. exf5 Rxf5 21. Rad1 Raf8 22. Kh2 Nxg2 23. Kxg2 Bh4 24. f3

[Assistant] R5f6


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

[User] 1. e4 c5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 cxd4 5. O-O e5 6. c4 a6 7. Ba4

[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. d4 c5 2. e4 cxd4 3. Nf3 d6 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 Be7 7. O-O O-O 8. a4 Nc6

[Assistant] Be3


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

[User] 1. d4 c6 2. Nf3 d5 3. c4 Nf6 4. Nc3 Bg4 5. Bf4 Bxf3 6. exf3 e6 7. Be2 Bd6 8. Bg5

[Assistant] Nbd7


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

[User] 1. d4 d6 2. e4 g6 3. Be3 Bg7 4. Qd2 e5 5. Ne2 Nc6 6. Nbc3 Nge7 7. f3 O-O 8. h4 f5 9. h5 f4 10. Bf2 g5 11. h6 Bf6 12. O-O-O Kh8 13. Kb1 a6 14. dxe5 Bxe5 15. Nd4 Nxd4 16. Bxd4 Nc6 17. Bxe5+ Nxe5 18. Nd5 Be6 19. Be2 Qd7 20. c4 Bxd5 21. Qxd5 Qc6 22. c5 Qxc5 23. Qxc5 dxc5 24. Rd5 Rae8 25. Rxc5 Re7 26. Rd1 c6

[Assistant] Rc2


[System] You are a chess 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. f4 g6 4. Nf3 Bg7 5. Bb5+ Nc6 6. O-O Bd7 7. d3 e6 8. Qe1 Nge7 9. f5 exf5 10. Bxc6 bxc6 11. Bg5 f6 12. Bf4 d5 13. Bd6 d4 14. Na4 O-O 15. Nxc5 Re8 16. e5 Nd5 17. Qg3 f4 18. Qf2 fxe5 19. Nxd7 Qxd7 20. Bc5 Ne3 21. Rfe1 Qd5 22. Ba3 c5 23. b3 Rab8 24. Rac1 a5 25. Nd2 a4 26. Ne4 axb3 27. axb3 Bf8 28. g3 Kg7 29. gxf4 exf4 30. Qxf4 Re5 31. Re2 Rbe8 32. Rf2 Rf5 33. Qg3 Rxf2 34. Qxf2 Bd6 35. Nxd6 Qxd6 36. Re1 Qd5 37. Re2 Qg5+ 38. Kh1 Rf8

[Assistant] Qg1


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

[User] 1. e4 e6 2. Nf3 d6 3. d4 Ne7 4. Bd3 Nd7 5. h4 h5 6. Ng5 Nf6 7. e5 dxe5 8. dxe5 Nfd5 9. c4 Nb6 10. Nxf7 Kxf7 11. Bg6+ Nxg6 12. Qxd8 Bb4+ 13. Qd2 Bxd2+ 14. Nxd2 Nxe5

[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. b4 Qxb4 5. Rb1 Qd6 6. d4 c6 7. Nf3 Nf6 8. Bd3 Bg4 9. Rxb7 e6 10. h3 Bh5 11. Ne4 Nxe4 12. Bxe4 Be7 13. g4 Bg6 14. Qe2 O-O 15. O-O Nd7 16. Bxg6 hxg6 17. Rb3 Qc7 18. 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] 1. d4 Nf6 2. c4 e6 3. e3 d5 4. Nf3 Bb4+ 5. Nc3 O-O 6. c5 b6 7. cxb6 axb6 8. Bd2 Ba6 9. Be2 Be7 10. O-O c5 11. Qa4 Bxe2 12. Qxa8 Bxf1 13. Kxf1 Qc7 14. a3 Nc6 15. Qa6 Qa7 16. Qxa7 Nxa7 17. Ne5 Rb8 18. f4 Ne8 19. a4 f6

[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: 7r/pp1k4/1q2p3/3pPnP1/7p/B1PP4/4Q1PP/R4R1K b - - 0 27

[Assistant] Ng3+


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

[User] 1. Nf3 Nf6 2. c4 d5 3. cxd5 e6 4. dxe6 Bxe6 5. d4 c5 6. e3 Nc6 7. Bb5 Be7 8. Ne5 Qc7 9. Qa4 O-O 10. Bxc6 cxd4 11. exd4 Rac8 12. O-O bxc6 13. Nc3 c5 14. Be3 Nd5 15. Nxd5 Bxd5 16. Rac1 Qd6

[Assistant] Nc4


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. e4 cxd4 5. Nd5 d3 6. Nf4 Nc6 7. Nxd3 Nf6 8. Be2 O-O 9. h4 Nxe4

[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. e3 e6 2. c3 d5 3. Ne2 Nf6 4. g3 c5 5. Bg2 Nc6 6. O-O Bd6 7. d4 O-O 8. dxc5 Bxc5 9. Nd2 Bb6 10. b3 Re8 11. Bb2 e5 12. c4 e4 13. cxd5 Qxd5 14. Nxe4 Qf5 15. Nxf6+ gxf6 16. Qd5 Qg6 17. Qf3 Bg4 18. Qxf6 Qxf6 19. Bxf6 Bxe2 20. Rfe1 Bg4 21. Rec1 Re6 22. Bc3 Rd8 23. b4 Red6

[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 g6 2. d4 Bg7 3. h4 h5 4. Nc3 Nf6 5. Bg5 c6 6. e4 d5 7. e5 Ne4 8. Bd3 Bf5 9. Qe2 Qa5 10. O-O Nxg5 11. Nxg5 Bxd3 12. Qxd3 e6 13. Nxe6 fxe6 14. Qxg6+ Kf8 15. Qxe6 Rh6 16. Qc8+ Ke7 17. Qxb7+ Nd7 18. Qxa8 Qb4 19. Qxa7 Qxb2 20. Na4 Qa3 21. Rab1 Rg6 22. e6 Rxe6 23. Rb7 Rd6 24. Re1+ Kf6 25. Rxd7 Rxd7

[Assistant] Qxd7


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

[User] FEN: 7k/pp4p1/7p/2N5/8/1B2n2P/PPP1nrP1/4R2K b - - 1 22

[Assistant] Ng3+


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

[User] FEN: r1b1kbnr/pp3ppp/2p5/Q5B1/8/8/PPP1BPqP/R3K2R w KQkq - 0 13

[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. c4 g6 2. g3 Bg7 3. Bg2 c6 4. Nf3 Nf6 5. O-O d5 6. b3 O-O 7. Bb2 Bg4 8. d3 Bxf3 9. Bxf3 e6 10. Nd2 Nbd7 11. Qc2 Ne8 12. d4 a6 13. Rad1 Qc7 14. Rfe1 Qa5 15. Bc3 Qb6 16. h4 Bxd4 17. Bxd4 Qxd4 18. cxd5 exd5 19. e4 Qc5 20. Qxc5 Nxc5 21. exd5 cxd5 22. Bxd5 Rb8 23. b4 Nd3 24. Re4 Nf6 25. Rd4 Nxd5 26. Rxd5 Nxb4 27. Rd7 Nxa2 28. Ne4 b5 29. Ra7 Rb6

[Assistant] Rdd7


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 Nc6 7. Bd3 d5 8. cxd5 Nxd5 9. c4 Nf6 10. dxc5 O-O 11. Nf3 Qa5+ 12. Bd2 Qxc5 13. O-O b6 14. Qe2 Bb7 15. Bc3 Rfd8 16. Bxf6 gxf6 17. Qc2 f5 18. Rfc1 Ne5 19. Nxe5 Qxe5 20. Bf1 Rac8 21. Qa4 a5 22. Rab1 Rd6 23. Qb5 Qxb5 24. cxb5 Rdd8 25. Rxc8 Rxc8 26. Rd1 Bd5 27. f3 Kf8 28. Rd4 Ke7 29. Kf2 Rc3 30. e4

[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] 1. d4 c5 2. Nf3 cxd4 3. Bg5 Nf6 4. Bxf6 gxf6 5. Nxd4 e6 6. Nf3 Nc6 7. e3 d6 8. g3 Be7 9. Bg2 Qc7 10. O-O Bd7 11. Nbd2 h5 12. h4 f5 13. c3 O-O-O 14. Nb3 Ne5 15. Nbd4 Ng4 16. Qb3 Bf6 17. Rac1 Rhg8 18. Rfd1 d5 19. Nb5 Qb8 20. c4 d4 21. Nbxd4 Nxf2 22. Rd2 Ne4 23. Rdc2 Rxg3

[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: 5rk1/pQ2Rp2/6p1/8/5P2/2P3P1/1P5K/5q2 b - - 2 32

[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. e4 Nf6 2. d3 e5 3. Nf3 Nc6 4. g3 d5 5. exd5 Nxd5 6. Bg2 Bc5 7. O-O O-O 8. Nc3 Rfe8 9. Nd2 Nxc3 10. bxc3 a6 11. Nb3 Bb6 12. Ba3 Bf5 13. Bc5 Rac8 14. Bxb6 cxb6 15. Qe2

[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. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. Nf3 Nf6 6. cxd4 a6 7. Nc3 Qd8 8. Bd3 g6 9. O-O Bg7 10. Re1 O-O 11. Bg5 Bg4 12. h3 Be6 13. Rxe6 fxe6

[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] FEN: 3R1bk1/5p1p/2p2Pp1/5r2/p5Q1/8/2q3PP/5R1K w - - 2 32

[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. e4 Nf6 2. Nc3 d5 3. e5 d4 4. exf6 dxc3 5. bxc3 exf6 6. d4 Bd6 7. Nf3 O-O 8. Be2 Re8 9. O-O Bg4 10. Re1 c5 11. Be3 Qc7 12. h3 Bh5 13. Rb1 Nd7 14. Qd2 Rad8

[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 Nf6 2. c4 e6 3. g3 c5 4. Nf3 cxd4 5. Nxd4 d5 6. Bg2 dxc4 7. O-O Bc5 8. Nb5 Qxd1 9. Rxd1 Na6 10. Nd2 c3

[Assistant] bxc3


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

[User] FEN: 3r4/1b2p2Q/pq2Nkp1/1p1P4/1Pp5/P1b5/6PP/5B1K w - - 4 28

[Assistant] Qg7+


[System] You are a chess 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. g3 dxc3 4. bxc3 Nf6 5. d3 g6 6. f3 Bg7 7. Bg2 O-O 8. Ne2 c6 9. O-O Nbd7 10. h3 Nh5 11. Kh2 Qc7 12. f4 e5 13. Bd2 exf4 14. Nxf4 Nxf4 15. Bxf4 Qa5 16. Rb1 Qxc3 17. Bd2 Qa3 18. Rb3 Qxa2 19. Bc1 Qa5 20. Qf3 Nc5 21. Rb1 Ne6 22. Be3 Qd8 23. Rbd1 Nd4 24. Qf2 a5 25. c3 Ne6 26. d4 a4 27. d5 cxd5 28. exd5 Nc7 29. Bc5 Nb5 30. Bxf8 Qxf8 31. d6 Be6 32. Rfe1 Nxd6 33. Bd5 Bxd5 34. Rxd5 Nf5 35. Rxf5 gxf5 36. Qxf5 a3 37. Ra1 Bxc3 38. Ra2 Bg7 39. Qd3 Qb4 40. h4 b5 41. Kh3 Qc4 42. Qf3 Qe6+ 43. g4 Ra4 44. Rxa3 Rxa3 45. Qxa3 h5 46. Qa8+ Kh7 47. Qe4+ Qxe4 48. Kg3 b4 49. Kf2 b3 50. g5 b2

[Assistant] g6+


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

[User] FEN: 8/6pp/5p2/2k2P1P/5KP1/8/8/8 b - - 2 44

[Assistant] Kd5


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

[User] 1. f4 c5 2. e4 Nc6 3. Nc3 d6 4. Bb5 g6 5. Bxc6+ bxc6 6. Nf3 Bg7

[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 e5 2. c4 d6 3. Nc3 Nf6 4. Nge2 Be7 5. b3 O-O 6. Bb2 c6 7. g3 Bg4 8. Bg2

[Assistant] Nbd7


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

[User] 1. d4 d6 2. c4 Nd7 3. d5 Ngf6 4. Nc3 g6 5. e4 Bg7 6. f4 O-O 7. Nf3 c6 8. Bd3 cxd5 9. cxd5 Nc5 10. Bc2 b5 11. O-O b4 12. Ne2 Nfxe4 13. Ng3 Nxg3 14. hxg3 a5 15. Be3 a4 16. Qd2 b3 17. axb3 Ba6 18. Rfd1 axb3 19. Bb1 Qb6 20. Kh2 Qb5 21. f5 Nd7 22. Nd4 Qxd5

[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: r2k1r2/pp1n4/2p1N3/2PpPbp1/3P2BR/8/PP1K1P2/7R b - - 0 27

[Assistant] Bxe6


[System] You are a chess 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. Nc3

[Assistant] Nf6


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

[User] FEN: 8/3n4/p7/8/1k2KPP1/8/P7/8 w - - 3 42

[Assistant] Kf5


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

[User] FEN: 6k1/5p1p/B2bp2q/5p2/6rP/1P4P1/1Q3P2/3R3K b - - 4 34

[Assistant] Rxh4+


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

[User] FEN: r5rk/3np1q1/p2p4/1p3QNP/3P4/8/PPP5/2KR3R b - - 0 26

[Assistant] Qxg5+


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

[User] 1. Nf3 e6 2. e4 Nf6 3. Nc3 d5 4. e5 Nfd7 5. d4 c5 6. dxc5 Nc6 7. Bf4 Bxc5 8. Bd3 a6 9. Qe2 h6 10. h4 b5 11. Rh3 Qb6 12. h5 Kf8 13. Nd1 Nb4 14. c3 Nxd3+ 15. Qxd3 a5 16. Be3 Ba6 17. Bxc5+ Qxc5 18. Qd4 Qc7 19. Ne3 Rc8

[Assistant] Rc1


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

[User] 1. d4 e6 2. c4 d5 3. Nc3 c6 4. Nf3 f5 5. cxd5 exd5 6. Bg5 Nf6 7. e3 Be7 8. Bd3 O-O 9. Qc2 g6 10. Ne5

[Assistant] Be6


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

[User] 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 Bd6 6. Nf3 O-O 7. e4 Re8 8. Bd3 Bc7 9. O-O d6 10. h3 a6

[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. c4 d5 2. cxd5 Qxd5 3. Nc3 Qd8 4. d4 c6 5. Nf3 g6 6. g3 Bg7 7. Bg2 Nf6 8. O-O O-O 9. e4 Bg4 10. e5 Bxf3 11. Bxf3 Nd5 12. Nxd5 cxd5 13. Qb3 e6 14. Bd2 Nc6 15. Be3 Na5 16. Qd3 Nc4 17. b3 Nxe3 18. fxe3 Rac8 19. Rac1 Qa5 20. a4 Qb4 21. Qb5 Qxb5 22. axb5 Rfd8 23. Kf2

[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 c5 3. d5 d6 4. Nc3

[Assistant] g6


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

[User] FEN: r3r1k1/1p3p1p/5b2/5Pp1/p1bN3P/P1P2K2/1P1B4/3R2R1 b - - 2 28

[Assistant] Bxd4


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

[User] FEN: 7r/6pp/5p2/p7/1b4b1/2B1P1Pk/3K3P/R6R b - - 5 30

[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: 1r4k1/3p2P1/2b2P1p/8/p7/P2R4/r1B5/2K2R2 b - - 3 35

[Assistant] Ra1+


[System] You are a chess 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. c4 h6 6. d4 dxc4 7. Nc3 e6 8. a4 Bb4 9. Ne5 Nbd7 10. Nxc4 O-O 11. Ne3 Bh7 12. Nc2 Be7 13. e4 a5 14. Qe2 Nb8 15. Rd1 Na6 16. Be3 Nb4 17. Rac1 Nxc2 18. Rxc2 Qb6 19. Rcd2 Qb3 20. f4 Bb4 21. e5 Nd5 22. Nxd5 cxd5 23. h3 Bxd2 24. Rxd2 Qxa4 25. Kh2 Rac8 26. g4 Be4 27. Bf1 Rc2 28. f5 Rxd2 29. Bxd2 Rc8 30. Bc3 Qb3 31. f6 Rxc3 32. bxc3 Qxc3 33. fxg7 Qxd4 34. Qb5 Qxe5+ 35. Kg1 Kxg7 36. Be2 Qg3+ 37. Kf1 Bg2+

[Assistant] Kg1


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

[User] FEN: 3r1rk1/R4p2/3n2p1/p2B3p/8/1P6/P5PP/4R1K1 b - - 3 32

[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. e4 c5 2. Nc3 g6 3. Nf3 Bg7 4. Bc4 e6 5. d3 Ne7 6. Be3 b6 7. Qd2 d5 8. Bb5+ Bd7 9. exd5 exd5 10. d4 O-O 11. O-O-O Bxb5 12. Nxb5 a6 13. Nc3 c4 14. h4 b5 15. h5 b4 16. Ne2 Qa5 17. Kb1 c3 18. bxc3 bxc3 19. Qxc3 Qb5+ 20. Qb3 Qxe2 21. Rhe1 Qb5 22. Bg5 Qxb3+ 23. axb3 Nf5 24. h6 Bxh6 25. g4 Bxg5 26. Nxg5 Nd6 27. Re5

[Assistant] f6


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

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. c5 Ne4 8. Qc2 e5 9. Bd3 Nxg5 10. Nxg5 e4 11. Be2 Nf6 12. h4 b6 13. cxb6 axb6 14. O-O Bd6 15. Ncxe4 Kd7 16. Nxd6 Kxd6

[Assistant] e4


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 a6 5. Ba4 b5 6. Bb3 d6 7. d3 Bg4 8. h3 Bh5 9. Nbd2 Nge7 10. Nf1 Bg6 11. Ng3 O-O 12. O-O Kh8 13. Be3 f5 14. Bxc5 dxc5 15. exf5 Nxf5 16. Ne4 Qe7 17. Qe2 Rad8 18. Rad1 Nd6 19. Bd5 Nb8 20. Nxc5

[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] FEN: r1bq1rk1/pp2bppp/2n2B2/2p1p3/4p3/2PP1N1P/PP2BPP1/RN1Q1RK1 b - - 0 9

[Assistant] exf3


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

[User] 1. d4 c6 2. c4 d6 3. Nc3 g6 4. e4 Bg7 5. e5 dxe5 6. dxe5 Qxd1+ 7. Nxd1 Bxe5 8. Nf3 Bg7 9. Be3 Nf6 10. Be2 O-O 11. O-O Bf5 12. Nc3 Bc2 13. Rac1 Bf5 14. Nd4 Be6 15. Nxe6 fxe6 16. Bf3 e5 17. Bg5 Nbd7 18. Be3 e4 19. Be2 Ne5 20. c5 Nd5 21. Nxd5 cxd5 22. Bd4 e6 23. Bxe5 Bxe5 24. f4 Bxb2 25. Rb1 Bd4+ 26. Kh1 Bxc5 27. Bb5 b6 28. Bd7 Rf6 29. Rfd1 Rd8 30. Bb5 d4 31. Bf1 e3 32. g3 e5 33. Be2

[Assistant] exf4


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

[User] FEN: 3q4/2b3pp/r5k1/p4p2/1p1P2PP/2PQ4/PP6/6K1 w - - 0 42

[Assistant] Qxf5+


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

[User] FEN: 1Q6/1P3pkp/6p1/p2Pp3/2q5/6P1/6KP/8 w - - 0 42

[Assistant] Qxe5+


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 O-O 6. Bd3 c5 7. dxc5 dxc5 8. e5 Nd5 9. Nxd5 Qxd5 10. Qe2 Nc6

[Assistant] Be3


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

[User] 1. d4 g6 2. c4 Bg7 3. Nc3 c5 4. d5 d6 5. e4 e6 6. Nf3 exd5 7. cxd5 Bg4 8. Qb3 Bc8 9. Bf4 a6 10. e5 dxe5 11. Bxe5 Nf6 12. O-O-O O-O 13. h4 h5 14. Ng5 Bf5 15. f3 Nbd7 16. Bd6 Re8 17. g4 hxg4 18. h5 b5 19. h6 c4 20. Qb4 a5 21. Qc5 Rc8 22. Qxb5 Bh8 23. h7+ Kg7 24. fxg4 Bxg4 25. Bg2 Ne5 26. Rdf1 Qxd6 27. Qb7 Rc7 28. Qb5 Ree7 29. Qb8 Ned7 30. Qa8 Qb6 31. d6 Qe3+ 32. Kb1 Qd3+ 33. Ka1 Qxd6 34. Qxa5 Qd5 35. Nxd5 Nxd5 36. Bxd5 Nf6 37. Bxf7 Re1+ 38. Rxe1 Rxf7

[Assistant] Ne6+


[System] You are a chess 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. Nf3 O-O 6. c4 d5 7. Nc3 dxc4 8. Bxc4 c6

[Assistant] O-O


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

[User] FEN: Q7/6kp/6p1/8/3b4/4q3/PP5B/2r2R1K w - - 4 33

[Assistant] Qf8#


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

[User] 1. Nf3 d6 2. Nc3 Nf6 3. d4 g6 4. e4 Bg7 5. h4 O-O 6. Be2 h5 7. Be3 c5 8. d5 Ng4 9. Bg5 Qb6 10. Rb1 Re8 11. Nh2 Nxh2 12. Rxh2 Nd7 13. Bxh5 gxh5 14. Qxh5 Qb4 15. Qg4

[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: r1bqkb1r/1p1n1ppp/p4n2/3N2B1/3P4/3B4/PP3PPP/R2QK1NR b KQkq - 0 9

[Assistant] Qa5+


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

[User] 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. Bf4 Bb4+ 6. Nbd2 Qe7 7. a3 Ngxe5 8. Nxe5 Nxe5 9. e3 Bc5 10. Nb3 Ng6 11. Bxc7 d6 12. Nxc5 Qxc7 13. Ne4 O-O 14. Qxd6 Qxd6 15. Nxd6 Be6

[Assistant] O-O-O


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

[User] 1. e4 e6 2. Nc3 d5 3. d4 Nf6 4. exd5 exd5 5. Bg5 Be7 6. Qd2 c6 7. O-O-O

[Assistant] O-O


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

[User] FEN: r1b3k1/pppp1rp1/5q1p/8/2B5/8/P1P2PPP/1N2Q1K1 w - - 0 17

[Assistant] Qe8+


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

[User] 1. d4 c5 2. d5 d6 3. c4 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 Nf6 7. Nf3 g6

[Assistant] g3


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

[User] FEN: 3r2k1/7p/1qp1rp1B/p5p1/4P3/2Q2P1P/P2R1PK1/8 w - - 2 27

[Assistant] Qb3


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

[User] FEN: r4r1k/5p1p/p2p1p1B/qpp2P2/2n1PP2/1P6/P1P1Q2P/2KR3R b - - 0 22

[Assistant] Qa3+


[System] You are a chess 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. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. O-O O-O 6. c4 c6 7. Nc3 Nbd7 8. Ne5 Nxe5 9. dxe5 Nd7 10. f4 dxc4 11. Ne4 Nc5 12. Be3 Nxe4 13. Bxe4 Qa5 14. Qc2 h6 15. Qxc4 Rd8 16. Rad1 Bd7 17. Bd2 Qb6+ 18. Kh1 Qxb2 19. Bc3 Qb6 20. f5 Qb5 21. Qxb5 cxb5 22. f6 Bf8 23. Bxb7 Rab8 24. Ba5 Rxb7 25. Bxd8 Bc6+ 26. Rf3 b4 27. Kg1 Bc5+ 28. Kf1 Bxf3 29. exf3 b3 30. axb3

[Assistant] Rxb3


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

[User] 1. e4 c5 2. Nf3 g6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. Be3 O-O 10. Qd2 a5 11. f3 a4 12. Rc1

[Assistant] Be6


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

[User] FEN: 1r1qrnk1/1b2Pp1p/p1p3p1/1p3P2/2P5/1PNPp1NP/P2Q2B1/4RRK1 b - - 0 20

[Assistant] exd2


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

[User] 1. d4 Nf6 2. c3 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O b6 7. Bg5 Bb7 8. Nbd2 Nbd7 9. Qc2 c5 10. e3 Rc8 11. Rac1 h6 12. Bxf6 Nxf6 13. Qd3 a5 14. a3 Ne4 15. Ne5 Nxd2 16. Qxd2 Bf6 17. f4 Bxe5 18. fxe5 Qe7 19. Rf2 f5 20. exf6 Rxf6 21. Rcf1 Rcf8 22. Rxf6 Rxf6 23. Rxf6 Qxf6 24. Qf2 Qxf2+

[Assistant] Kxf2


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

[User] FEN: 5k2/5p2/7b/p3pB1Q/P3P3/1p5P/1Pq2PPK/8 b - - 6 37

[Assistant] Bf4+


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

[User] 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d3 O-O 5. O-O d6 6. Nbd2 c5 7. e4 Nc6 8. Re1 Bg4 9. a4 Nd4 10. h3 Nxf3+ 11. Nxf3 Bxf3 12. Qxf3 Nd7 13. Bg5 Ne5 14. Qe2 Qb6 15. Be3 Qxb2 16. Reb1 Qc3

[Assistant] Bd2


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

[User] 1. e4 c5 2. b3 g6 3. Bb2 Nf6 4. e5 Nd5 5. h4 Bg7 6. h5 Nc6 7. Qf3 Nxe5 8. Bxe5 Bxe5 9. d4 Bxd4 10. c3 Qa5 11. Ne2 Nf6 12. Nxd4 cxd4 13. hxg6 fxg6 14. Bc4 d5 15. Bd3 dxc3 16. O-O Bg4 17. Qg3 O-O 18. Re1 Rae8 19. f3 Bd7 20. Bxg6 hxg6 21. Qxg6+ Kh8 22. Kf2 Qc5+ 23. Ke2 Nh7 24. Rh1 Bb5+ 25. Kd1 Qd4+ 26. Kc1 Qe3+ 27. Kc2

[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] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O Bg4 6. d3 Qf6 7. Nbd2 Bc5 8. b3 Ne7 9. Bb2 Ng6 10. Nc4 O-O-O 11. Ne3 Bxf3 12. Qxf3 Qxf3 13. gxf3 Nf4 14. Bxe5 Ng6 15. Bg3 h5 16. h4 Be7 17. Nf5 Bf6 18. Rad1 Ne5 19. Kg2 g6 20. Ne3 Rhe8 21. f4 Ng4 22. Nxg4 hxg4 23. e5 Be7 24. d4 Rh8 25. Rh1 b5 26. c4 Kb7 27. d5 cxd5 28. cxd5 Bc5 29. f3 gxf3+ 30. Kxf3 Rd7 31. Rhe1 Be7 32. Kg4 Rh5 33. d6 cxd6 34. exd6 Bxd6 35. Re8 f5+ 36. Kf3 Rhh7 37. Re6 Rhg7 38. Rdxd6 Rxd6

[Assistant] Rxd6


[System] You are a chess 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/1p2kpb1/2q1p3/p3Pn2/5PQ1/P1B4N/1P2p2K/3R4 w - - 0 33

[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] FEN: 8/8/2k5/P3p3/1K1bP3/7p/7B/8 b - - 0 48

[Assistant] Be3


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

[User] 1. e4 d6 2. Nf3 c5 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Bg5 e5 7. Ndb5 a6 8. Bxf6 gxf6 9. Na3 b5 10. Nd5 Bg7 11. c3 f5 12. exf5 Bxf5 13. Nc2 O-O 14. Nce3 Bg6 15. Bd3 f5 16. f4 Ne7 17. Bc2 e4 18. O-O Nc6 19. Kh1 Ra7 20. a4 Qb8 21. axb5 axb5 22. Rxa7 Qxa7 23. Bb3 Kh8 24. g4 fxg4 25. Qxg4 Na5 26. Bc2 Nc4 27. Nxc4 bxc4 28. f5 Bf7 29. f6 Bh6 30. Ne7 e3 31. Qf5 Bg8 32. Nxg8 Kxg8 33. Be4 e2 34. Re1 Kh8 35. Rxe2 Qa1+

[Assistant] Kg2


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

[User] FEN: 8/8/6pk/2p1Q3/7P/6P1/r4qB1/5N1K b - - 0 46

[Assistant] Qxg2#


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

[User] 1. d4 d5 2. Nf3 e6 3. g3 c5 4. c3 Nc6 5. Bg2 cxd4 6. cxd4 g6 7. O-O Bg7 8. Nc3 Nge7 9. Bg5 Qb6 10. Na4 Qd8 11. Rc1 O-O 12. Qd2 Re8 13. Rfd1 f6 14. Bf4 e5 15. dxe5 fxe5 16. Bg5 Be6 17. Nc5 Qc8 18. Bxe7 Nxe7 19. Ng5 Bh6 20. Ncxe6 Qxe6 21. Nxe6 Bxd2 22. Rxd2 Rac8

[Assistant] Nc7


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

[User] 1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. O-O Bd7 5. Re1 a6 6. Bxc6 Bxc6 7. c3 Nf6 8. d3 e5 9. Nbd2 Be7 10. Nf1 O-O 11. Ne3 Re8 12. Nf5 Bf8 13. Bg5 g6 14. Nh6+ Bxh6 15. Bxh6 Nh5 16. Qd2 Qd7 17. Rad1 Rad8 18. h3 d5 19. Qe2 Nf4 20. Bxf4 exf4 21. Qc2 dxe4 22. dxe4 Qe7 23. Rxd8 Rxd8 24. h4 Re8 25. Qc1 Qf6 26. Qc2 h6 27. Qd3 Kg7 28. a3 Qe6 29. Qd2 Qf6 30. Qd3 g5 31. hxg5 hxg5 32. e5 Qg6 33. Qxg6+ Kxg6 34. Nd2

[Assistant] Kf5


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

[User] 1. e4 Nf6 2. e5 Nd5 3. Bc4 Nb6 4. Bb3 e6 5. Qf3 d5 6. exd6 Bxd6 7. d4 O-O 8. Ne2 c5 9. c3 c4 10. Bc2 g6 11. O-O Be7 12. Bh6 Re8 13. Nd2 Bf6 14. Ne4 Bg7 15. Bg5 Qd5 16. Bf6 Nc6 17. Nf4 Qf5 18. Nd6 Qxf6 19. Nxe8 Qe7 20. Nxg7 Kxg7 21. Qg3 Nd5 22. Rae1 Nxf4 23. Qxf4 Qf6

[Assistant] Qc7


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

[User] 1. e4 e5 2. Nf3 Nf6

[Assistant] Nxe5


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

[User] 1. e4 d5 2. Nc3 dxe4 3. Nxe4 Nf6 4. Nxf6+ exf6 5. Nf3 g6 6. d4 Be7 7. Bd3 Kf8 8. O-O Kg8 9. c3 Kg7 10. Re1 Rg8 11. Bc2 Rf8 12. Bf4

[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] 1. d4 Nc6 2. e3 e5 3. dxe5 Nxe5 4. b3 Ng6 5. Bb2 Nf6 6. Nd2 d5 7. h4 c6 8. h5 Ne7 9. h6 Ng6 10. Ngf3 gxh6 11. Nh4 Bg7 12. Bd3 Qe7 13. Nf5 Bxf5 14. Bxf5 Ne5 15. Nf3 Ng6 16. Nd4 O-O 17. Bd3 c5 18. Nf5 Qe6 19. Nxg7 Kxg7 20. Qf3 d4 21. O-O-O Ne5 22. Qg3+ Kh8 23. exd4 Nxd3+ 24. Rxd3 c4 25. Rf3 Ne4 26. d5+ c3 27. Bxc3+ Nxc3 28. dxe6 Ne2+ 29. Kb2 Nxg3 30. Rxg3 fxe6 31. Rxh6 Rxf2 32. Rgh3 Rf7 33. Rxe6 b6 34. Rf3 Raf8 35. Rxf7 Rxf7 36. Rh6 Kg7 37. Rh2 h6 38. a4 Kg6 39. b4 Rf6 40. Kb3 Re6 41. c3 Rf6 42. b5 Rf5 43. Kb4 Rf6 44. c4

[Assistant] Re6


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

[User] 1. g3 Nf6 2. Bg2 g6 3. d4 Bg7 4. Nc3 O-O 5. f3 d5 6. Bg5 c5 7. e3

[Assistant] Nc6


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

[User] 1. e4 e6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 f5 5. Nc3 Nf6 6. Nf3 Bd6 7. Bc4 O-O 8. Bg5 Kh8 9. Qd2 c6 10. O-O-O b5 11. Bb3 b4 12. a4 bxc3 13. Qxc3 Na6 14. Qd2 Bb4 15. c3 Bd6 16. Rhe1 Qe8 17. Ne5 Bxe5 18. dxe5 Nd5 19. c4

[Assistant] Rb8


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

[User] FEN: 2r1r1k1/1p4p1/3q3p/p7/Pn1PBRQP/4P1P1/2p4K/R7 w - - 1 34

[Assistant] Qf5


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

[User] FEN: 7k/1b3Rrp/p7/8/6pK/p2P3P/B1P3r1/8 w - - 0 38

[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] 1. e4 e5 2. Nf3 f5 3. d4 fxe4 4. Nxe5 Nf6 5. Nc3 Bb4 6. Bd2 d6 7. Nc4 O-O

[Assistant] Be2


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

[User] 1. d3 d6 2. Nf3 Nd7 3. d4 Ngf6 4. Bf4 g6 5. e3 Bg7 6. h3 O-O 7. Bh2 Qe8 8. c4 e5 9. Be2 e4 10. Nfd2 a5 11. O-O Qe7 12. Nc3 c6 13. Rb1 h5 14. a3 d5 15. c5 h4 16. Bd6 Qe6 17. Bxf8 Nxf8 18. b4 axb4 19. axb4 g5 20. f4 gxf4 21. exf4 Qf5 22. Nb3 Ng6 23. b5 Bh6 24. Ra1 Rb8

[Assistant] Na5


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

[User] 1. d3 d5 2. Nd2 c6 3. Ngf3 Nf6 4. g3 h6 5. Bg2 Bf5 6. O-O Bh7 7. c3 e6 8. e4 Be7 9. Qe2 O-O 10. Re1 a5 11. e5 Nfd7 12. d4 c5 13. h4

[Assistant] Nc6


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

[User] FEN: r3q1k1/1p1b2bR/3p2p1/2pP1p2/p1P1P3/2N2KP1/PP1Q1P2/7R b - - 2 28

[Assistant] Bxc3


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

[User] FEN: 2r1r1k1/1b2pp1p/p2p2p1/1p1P1P2/3Q4/nPqB1N1P/P1P3P1/2KRR3 b - - 4 25

[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. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. O-O a6 10. e4 c5 11. d5 Qc7 12. dxe6 fxe6 13. Bc2 c4 14. Ne2 Nc5 15. Ned4 Bd6 16. b4

[Assistant] cxb3


[System] You are a chess 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 Be7 4. Nc3 Nf6 5. Bg5 O-O 6. e3 c6 7. Qc2 h6 8. Bh4 c5 9. dxc5 Bxc5 10. Rd1 Bb4 11. Nd2 Nbd7 12. cxd5 g5 13. dxe6 fxe6 14. Bg3 Qe7 15. Bc4 Nb6 16. Bb3 Kg7 17. O-O Bd7 18. Nde4 Bc6 19. Be5 Bxc3 20. Bxc3 Nd5 21. Bxd5 Bxd5 22. Nxf6 Rxf6 23. f4 g4 24. e4 Qc5+ 25. Kh1 Kg8 26. exd5 Rf5 27. dxe6 Re8 28. Qd2 g3 29. Rfe1 gxh2 30. e7 Qc6

[Assistant] Qd4


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

[User] 1. e3 c6 2. Nc3 d5 3. Nf3 Nf6 4. d4 Bg4 5. Be2 Bxf3 6. Bxf3 Nbd7 7. O-O e6 8. Be2 Be7 9. Re1 O-O 10. b3 Re8 11. Bb2 Nf8 12. Qd2 Ng6 13. Rad1 Qa5 14. Bf3 Qd8 15. a3 Rc8 16. e4 dxe4 17. Nxe4 Nxe4 18. Bxe4 Bf6 19. Bf3 Qb6 20. c4 Rcd8 21. Qc3 Rd7 22. c5 Qc7 23. Qc4 Red8 24. g3 Ne7 25. Kg2 Nd5 26. Re2 b6 27. cxb6 Qxb6 28. Rc1 Rc8 29. Rec2 Rdc7 30. b4

[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] FEN: 1r3rk1/p4ppp/1n4P1/7P/2p1Q3/1PP5/qBP2P2/2KR3R b - - 0 21

[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] FEN: 8/1R5p/4N1pk/p7/4p1P1/3nr2P/P5K1/8 w - - 0 34

[Assistant] g5+


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

[User] FEN: r2q1rk1/3n1pp1/R2Pp1np/4P3/2B2P2/8/1P4PP/2BQR1K1 b - - 0 20

[Assistant] Rxa6


[System] You are a chess 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 Nd7 4. d3 e5 5. O-O Bd6 6. Nbd2 Ngf6 7. e4 O-O 8. exd5 cxd5 9. Re1 Re8 10. c4 Nf8 11. cxd5

[Assistant] Nxd5


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

[User] FEN: 6k1/5p2/8/1p2PR2/rrpR4/8/pP6/K7 w - - 1 43

[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. g3 Nf6 2. Bg2 Nc6 3. d4 e5 4. c3 exd4 5. cxd4 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 O-O 8. Nf3 d6 9. Nc3 Bg4 10. O-O a6 11. d5 Ne7 12. Nd4 Ng6 13. f3 Bd7 14. e4 Qc8 15. Rac1 Bh3 16. Nce2 Bxg2 17. Kxg2 Nh5 18. h4 Qd7 19. Rc3 Ne5 20. Rfc1 Rac8 21. Nf4 Nxf4+

[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] FEN: 6k1/1p3pp1/1p5p/3pPq2/3Pn3/P3BPrP/1P2Q1P1/2R4K b - - 0 27

[Assistant] Rxh3+


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

[User] FEN: 3r4/3q2k1/2r2pp1/2P4p/2R1Q2P/P4PP1/3p2K1/3R4 b - - 0 40

[Assistant] Re6


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

[User] 1. e4 e6 2. d4 Ne7 3. Nf3 d5 4. exd5 exd5 5. c4 c5 6. Nc3 cxd4 7. Qxd4 Nbc6 8. Qxd5 Nxd5 9. cxd5 Nb4

[Assistant] Bb5+


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

[User] 1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. d4 Bg7 5. h3 O-O 6. Nf3 Nfd7 7. Bg5 f6 8. Be3 e5 9. d5 a5

[Assistant] g4


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

[User] FEN: 2r1b1k1/1pR3p1/p3p1B1/3pPpQ1/3q4/N6P/5PP1/R5K1 b - - 0 27

[Assistant] Qxa1+


[System] You are a chess 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. c4 g6 4. Nc3 Bg7 5. Nf3 Nf6 6. Bd3 O-O 7. O-O Nfd7 8. e4 c5 9. dxc5 Nxc5 10. Bc2 Bg4 11. h3 Bxf3 12. Qxf3 Nc6 13. Rd1 Nd4 14. Qg3 Nxc2 15. Be3 Nd4 16. Bxd4 e5 17. Bxc5 Qc8 18. Bxd6 Re8 19. c5

[Assistant] b6


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

[User] FEN: 2k2r2/4q2p/1p2prpn/pP1N4/P2P4/8/2P1Q1PP/R4RK1 b - - 0 22

[Assistant] Rxf1+


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

[User] 1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. Bb5+ Kf8 6. d3 f6 7. O-O Nh6 8. e5 Nf7 9. d4 a6 10. Bc4 d5 11. Bxd5 e6 12. Bb3 f5 13. d5 b5 14. dxe6 c4 15. exf7

[Assistant] Qxd1


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

[User] 1. d4 Nf6 2. c4 c5 3. e3 e6 4. Nf3 d5 5. Nc3 Nc6 6. a3

[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: 8/1k6/1p6/p7/R1KP3P/2P5/1r5r/4R3 b - - 1 41

[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 d5 2. Bb2 Nf6 3. d4 c5 4. Nf3 Nc6 5. e3 Bg4 6. Nbd2 e6 7. Be2 Bd6 8. O-O O-O 9. Ne5 Bxe2 10. Qxe2 Qc7 11. f4 Ne8 12. Rac1 f6 13. Nxc6 bxc6 14. c4 Qe7 15. cxd5 cxd5 16. Ba3 Rc8 17. dxc5 Bxc5 18. Bxc5 Rxc5 19. Nf3 Nc7 20. Nd4 Rc8 21. Rxc5 Qxc5 22. Qd2 e5 23. fxe5 fxe5 24. Nf3 Re8 25. Rc1 Qb6 26. Rxc7 Qxc7 27. Qxd5+ Qf7 28. Qe4 g6 29. Nxe5 Qf5 30. Qc4+ Qe6 31. Ng4 Qxc4 32. bxc4 h5 33. Nf6+ Kf7 34. Nxe8 Kxe8 35. Kf2 Kd7 36. Kf3 Kc6 37. Ke4 Kc5 38. Kd3 a5 39. e4 g5 40. h3 a4 41. Kc3 h4 42. Kd3 a3 43. Kc3 Kd6 44. Kd4 Ke6 45. c5 Kd7 46. Kd5 Kc7 47. c6 g4 48. e5

[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] FEN: 3k4/7p/2K5/2PN2p1/5p2/1P3PrP/8/8 w - - 7 53

[Assistant] Kb7


[System] You are a chess 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. g3 Bg7 4. Bg2 O-O 5. Nf3 d6 6. O-O Re8 7. Re1 c6 8. e4 Bg4 9. h3 Bxf3 10. Qxf3 e5 11. dxe5 dxe5 12. Bg5 h6 13. Be3 Nbd7 14. Nd2

[Assistant] Qc7


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

[User] 1. e4 e6 2. Nc3 Ne7 3. b3 d6 4. Bb2 a6 5. Nf3 b6 6. d4 Bb7 7. Bd3 Nd7 8. Qe2 h6 9. O-O g6 10. e5 d5 11. Nd2 Bg7 12. f4 c5 13. Nf3 Qc7 14. Kh1 b5 15. Qf2 c4 16. Be2 b4 17. Na4 c3 18. Bc1 Bc6 19. Nc5 Nxc5 20. dxc5 Bb5 21. Be3 Nf5 22. Bd4 O-O 23. Bxb5 axb5 24. a3 bxa3 25. Bxc3 Rfc8 26. b4 Ra4 27. Rfb1 Bf8 28. Nd4 Bxc5 29. bxc5 Qxc5 30. Rb3 Nxd4 31. Bxd4 Qxd4 32. Qxd4 Rxd4 33. Rxb5 Rxc2 34. h3 Rc3 35. Ra5 Rxf4 36. R5xa3 Rxa3 37. Rxa3 Re4 38. Ra8+ Kg7 39. Ra3 Rxe5 40. Kh2 Re4

[Assistant] Rf3


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

[User] 1. d4 d5 2. Nf3 e6 3. c3 Nf6 4. Bf4 Be7 5. e3 c6 6. h3 Nbd7 7. Bd3 O-O 8. Nbd2 Re8 9. O-O Nf8 10. Ne5 N6d7 11. Bh2 Bf6 12. f4 Be7 13. g4 f6 14. Nxd7 Qxd7 15. e4 dxe4 16. Nxe4 b6 17. Qe2 Bb7 18. Rae1 Rad8 19. Ng3 c5 20. Bb5 Qd5 21. Bc4 Qd6 22. Bxe6+ Nxe6 23. Qxe6+ Qxe6 24. Rxe6 cxd4 25. cxd4 Rxd4 26. Nf5 Kf7 27. Rxe7+ Rxe7 28. Nxd4 Rd7 29. Nf5 Rd2 30. Ne3 Re2 31. Rc1

[Assistant] Rxe3


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

[User] 1. d4 f5 2. e4 g6 3. exf5 d6

[Assistant] fxg6


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

[User] FEN: r2rb2k/1pp2Qpp/p4p2/2p1qP2/4P3/2P4P/PP1N2P1/4RRK1 w - - 4 20

[Assistant] Qf8#


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

[User] 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. Qc2 O-O 7. e3 c6 8. Bd3 Nbd7 9. Nf3 Re8 10. O-O Nf8 11. Ne5 Ng6 12. f4 h6 13. Bxg6 fxg6 14. Qxg6 hxg5 15. Qf7+ Kh8 16. fxg5 Ne4 17. Qh5+ Kg8 18. Nxe4 dxe4 19. Ng6

[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. d4 e5 2. dxe5 Nc6 3. Nc3 f6 4. exf6 Nxf6 5. e4 Bc5 6. Bd3 d6 7. Qe2 Bg4 8. f3 Nd4 9. Qd2 Bh5 10. Nge2 Nxe2 11. Qxe2 O-O 12. Be3 Kh8 13. Bxc5 dxc5 14. O-O-O Qe7 15. g4 Bf7 16. e5 Nd5 17. Nxd5 Bxd5 18. Rhf1 Bg8 19. f4 b5 20. Be4 Rab8 21. Kb1 c4 22. Bd5 c6 23. Bxg8 Kxg8 24. e6 b4 25. Qe5 c3 26. Rd7 Qf6 27. Qxf6 Rxf6 28. f5 Re8 29. Rfd1 h5 30. Rd8 Kf8 31. Rxe8+ Kxe8 32. h3 hxg4 33. hxg4

[Assistant] g6


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

[User] FEN: 8/2R5/4p3/4Pp1P/1p3P2/1n2p3/1k2N2r/3R1K2 b - - 3 55

[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] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. Nf3 Nf6 5. Na3 e6 6. Bc4 Qd8 7. d4 Nbd7 8. Bf4 a6 9. O-O b5 10. Bb3 Bb7 11. Ne5 c4 12. Bc2 Bxa3 13. bxa3 Nd5 14. Bg3 Nxc3 15. Qh5 Qe7 16. Rfe1 Nf6 17. Qh3 Rd8 18. Bh4 Rxd4

[Assistant] Re3


[System] You are a chess 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 c5 3. Bg2 Nc6 4. d4 e6 5. O-O Nf6 6. c4 dxc4 7. Qa4 Bd7 8. Qxc4 b5 9. Qd3 c4 10. Qd1 Bd6 11. Nc3 a6 12. e4 Bb4

[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 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. Qc2 O-O 7. e3 Nbd7 8. Bd3 b6

[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 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5

[Assistant] Nbd7


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

[User] 1. d4 c5 2. Nf3 Nf6 3. d5 b5 4. Bg5 d6 5. Bxf6 exf6 6. e4 a6 7. a4 b4 8. Nbd2 Nd7

[Assistant] h3


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

[User] 1. e4 e5 2. Nf3 Nf6 3. d3 Nc6 4. Nbd2 Bc5 5. Be2 d6 6. O-O Bg4 7. c3 Qd7 8. b4 Bb6 9. Qc2 O-O 10. a3 a5 11. Bb2 Nh5 12. h3 Nf4 13. Nc4 Bxh3 14. Nxb6 cxb6 15. gxh3 Qxh3 16. Ne1 f5 17. Bf3 Rf6 18. Bg2 Rg6 19. f3 Rf8 20. b5 Ne7 21. Bc1 Nxg2 22. Nxg2 f4 23. Rf2 Rg3 24. Qe2 Ng6 25. Ra2 Nh4 26. a4 Rf6 27. Ba3 Rfg6 28. Bxd6 Nxf3+ 29. Rxf3 Rxf3 30. Bxe5 Re3 31. Qf2 f3 32. Bf4 Rxg2+ 33. Kf1 Rxf2+ 34. Kxf2 Re2+ 35. Rxe2 Qg2+ 36. Ke3

[Assistant] Qxe2+


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

[User] 1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 O-O 6. Nf3 d6 7. h3 Na6

[Assistant] Bd3


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

[User] FEN: 2b1r1k1/2p3b1/1p5p/pP1r2p1/P3P3/2p3P1/2R1N1BP/1R4K1 w - - 0 34

[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: 5rk1/pp5R/2n3p1/5N2/3pr3/q2B4/2PK1PP1/3R4 w - - 0 26

[Assistant] Rg7+


[System] You are a chess 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/p4pp1/7p/4qb2/8/1BP1p2P/PP4P1/3Q3K w - - 0 28

[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] FEN: 4R3/2k5/2p2P2/8/2P1K3/3P4/8/r7 b - - 4 51

[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. Nf3 d5 2. g3 Nf6 3. Bg2 g6 4. O-O Bg7 5. d3 O-O 6. Nbd2 Bg4 7. h3 Be6 8. e4 Nc6 9. Re1 Qd7 10. Ng5 dxe4 11. Nxe6 Qxe6 12. Nxe4 Nxe4 13. Rxe4 Qd7 14. c3 Rad8 15. d4 e5 16. Be3 exd4 17. Bxd4 Nxd4 18. cxd4 Bxd4 19. Qe2 Bb6 20. Re1 Qd2 21. Re7 Qxe2 22. R1xe2 Rb8 23. Rd2 Ba5 24. Rdd7 Bb4 25. Re3 Bd6 26. Rb3 b6 27. Kf1 Rbe8 28. Bc6 Re5 29. Rd3 Kg7

[Assistant] h4


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

[User] 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Bb4+ 6. Nbd2 Nf6 7. O-O O-O 8. a3 Bxd2 9. Nxd2 Nc6 10. b4 Ne5 11. Bb3 Bg4 12. f3 Bh5 13. Bb2 Nd3 14. Qc2 Nxb2 15. Qxb2 Qd6 16. Rac1 Rad8 17. Nc4 Qf4 18. Qd2 Qxd2 19. Nxd2 c6 20. h4 h6 21. Kf2 Bg6 22. Bc4 Nd7 23. Nb3 Ne5 24. Rfd1 d3 25. Nc5 d2 26. Rc2 Nxc4 27. Rxc4

[Assistant] b6


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

[User] FEN: 7Q/r4p1p/p1kp1Np1/2b5/R3P3/1P6/P3qP2/6K1 w - - 13 41

[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Na3 cxd4 7. cxd4 Nf5 8. Nc2 Bd7 9. g4 Nfe7 10. Bd3 g6 11. Bg5 Qb6 12. Bf6 Rg8 13. b3 Nb4 14. Nxb4 Qxb4+ 15. Qd2 Qb6 16. O-O Nc6 17. Bc2 Rc8 18. Rac1 Ba3 19. Rcd1 Bb4 20. Qh6 Ne7 21. Qxh7 Rxc2 22. Bxe7 Kxe7 23. Qxg8 Qa6 24. Ng5 Be8 25. Qg7 Qe2 26. Qf6+ Kd7 27. Qf3 Rxa2 28. Qxe2 Rxe2 29. h4 Be7 30. Nf3 Rb2 31. Rb1 Ra2 32. Kg2 a6 33. Kg3 f6 34. exf6 Bxf6 35. Ne5+ Bxe5+ 36. dxe5 Ke7 37. f4 Bd7 38. h5 Kf7 39. Rh1 Kg7 40. h6+ Kh7 41. Kh4

[Assistant] Rf2


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

[User] 1. d4 g6 2. Nf3 Bg7 3. c4 Nf6 4. Nc3 d5 5. Bf4 O-O 6. e3 c5 7. dxc5 Qa5 8. cxd5 Nxd5 9. Qxd5 Bxc3+ 10. Kd1 Rd8 11. Qxd8+ Qxd8+ 12. Kc2 Bf6 13. Rd1 Bf5+ 14. Kc1

[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. d4 c5 2. Nf3 cxd4 3. c3 d5 4. cxd4 Nf6 5. Nc3 e6 6. Bg5 Be7

[Assistant] Qd2


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

[User] 1. c4 d5 2. cxd5 Nf6 3. e4 Nbd7 4. Nc3 c6 5. d4 cxd5 6. e5 Ne4 7. Bd3 Nxc3 8. bxc3 e6 9. Ne2

[Assistant] Qc7


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

[User] FEN: 8/2p1k3/8/1P5P/3nbP2/8/P1pK4/6R1 b - - 3 46

[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. Nc3 d5 2. d4 c6 3. e4 Nf6 4. e5 Ng8 5. f4 e6 6. f5 exf5 7. Nf3 f6 8. Bd3 fxe5 9. O-O e4 10. Be2 exf3 11. Bxf3 Nf6 12. Bf4 Bd6 13. Be5 O-O 14. Ne2 Ne4 15. Bxe4 fxe4 16. c3 Bxe5 17. dxe5 Rxf1+ 18. Qxf1 Qe7 19. Nd4 Qxe5 20. Re1 Nd7 21. Qf2 Nf6 22. Rf1 Bd7 23. h3 Rf8 24. Qf4 Qxf4 25. Rxf4 g6 26. g4 Kg7 27. g5 Nh5 28. Rxf8 Kxf8 29. h4 Nf4 30. b4 Ne6 31. Ne2 Ke7 32. a4 Kd6 33. a5

[Assistant] e3


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

[User] FEN: Q1bqk2r/p2pbp1p/1p2p2B/2p1P3/3P1Pp1/2P3P1/PP5P/RN2NK2 b k - 0 19

[Assistant] Ba6+


[System] You are a chess 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. c3 Nf6 3. e3 Bg7 4. Nf3 O-O 5. Bd3 d5 6. Qc2 c5 7. Nbd2 Nc6 8. O-O Bg4 9. a3 Rc8 10. Qb1 e6 11. h3 Bxf3 12. Nxf3 a6 13. Re1 b5 14. dxc5 Nd7 15. b4 Bxc3 16. Bb2 Bxe1 17. Qxe1 e5 18. Bc2 Qe7 19. Bb3 Nf6 20. Rd1 Rfd8 21. Qc3 Ne4 22. Qc1 Nf6 23. Qa1 d4 24. exd4 exd4 25. Nxd4

[Assistant] Nxd4


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 c5 6. e5 Ne8 7. dxc5 d6 8. cxd6 exd6 9. exd6 Nxd6 10. Be3 Nc6 11. Be2 Be6 12. O-O Nxc4 13. Bxc4 Bxc4 14. Re1 Nb4 15. Qa4 a5

[Assistant] Red1


[System] You are a chess 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 a6 7. Nd6+ Bxd6 8. Qxd6 Qe7 9. Qxe7+ Nxe7 10. Bg5 Neg8 11. O-O-O h6 12. Be3

[Assistant] Ne7


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

[User] FEN: 3R4/p4pkp/Bp6/n2Q2pq/4Pb2/5PP1/P6P/7K b - - 0 29

[Assistant] Qxf3+


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

[User] 1. Nf3 d5 2. b3 e6 3. Bb2 Nf6 4. d4 Be7 5. g3 O-O 6. Bg2 Nbd7

[Assistant] O-O


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

[User] 1. e4 c6 2. Nf3 g6 3. Ng5 Bg7 4. Qf3 Nf6 5. e5 h6 6. exf6 Bxf6 7. Ne4 O-O 8. Nxf6+ exf6 9. d3 Kg7 10. Qh3 d5 11. Qxh6+ Kg8 12. h4 Re8+ 13. Be2 Bf5 14. h5 Re7 15. Be3 g5 16. f4 Qf8 17. fxg5 Qxh6 18. gxh6 Kh7 19. Kd2 d4 20. Bxd4 Nd7 21. Nc3 Rae8 22. Rhe1 b5 23. g4 b4 24. gxf5 bxc3+ 25. Bxc3 Ne5 26. Bxe5 Rxe5 27. Bf3

[Assistant] Kxh6


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

[User] FEN: 2k5/8/8/4K2R/2r5/2P5/6P1/8 b - - 0 55

[Assistant] Rc5+


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

[User] 1. g3 d5 2. Bg2 c6 3. c3 Nf6 4. Nf3 g6

[Assistant] O-O


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

[User] 1. d4 e6 2. Nf3 d5 3. Bg5 c5 4. Bxd8 Kxd8 5. dxc5 Bxc5 6. Nc3 a6

[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 c5 2. d5 Nf6 3. c4 e6 4. Nc3 exd5 5. cxd5 g6 6. e4 d6 7. f4 Bg7 8. Nf3 O-O 9. Be2 Re8 10. O-O Nxe4 11. Nxe4 Rxe4 12. Ng5 Re8 13. Bg4 Bxg4 14. Qxg4 f5 15. Qf3 Qf6 16. Ne6 Na6 17. Bd2 Nb8 18. Bc3 Na6 19. Bxf6 Bxf6 20. Rfe1 Bxb2 21. Rab1 Bf6 22. Rxb7 Nb4 23. g4 fxg4 24. Qxg4 Nd3 25. Rf1 c4 26. f5 Ne5 27. Qg2 c3 28. fxg6 hxg6

[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. g3 c6 2. Bg2 d6 3. Nf3 Nd7 4. O-O Qc7 5. d4 Ngf6 6. c4 e5 7. d5 Be7 8. Nc3 Nf8

[Assistant] e4


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

[User] 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. c3 Nf6 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. h3 O-O 10. Nc3 Be6 11. O-O Ne7 12. Bd3 Nxc3 13. bxc3 Bf5 14. Bg5 Bxd3 15. Qxd3 Qd7 16. a4 a5 17. Nh4 Ng6 18. Nf5 h6 19. Bd2 Ne7 20. Ng3 f5 21. f4 Qc6 22. Rfe1 Ra6 23. Kh2 Ba7 24. Rab1 Rb6 25. Rxb6 Bxb6 26. Ra1 g6 27. h4 h5 28. Be3 Ra8 29. Nf1 Ra6 30. Nd2 Ba7 31. c4 Rb6 32. c5 Rb4 33. Qc2 b6 34. Nb1 bxc5 35. dxc5 d4 36. Bd2 Rb7 37. Na3 Qxc5 38. Qa2+ Qd5 39. Nc4 Nc6 40. Qc2 Bc5 41. Nxa5 Nxa5

[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] FEN: rn1k3r/pp3ppp/2p3q1/8/2PP1n2/1Q1B1PN1/PP5P/R3R1K1 b - - 2 18

[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. e4 e5 2. Nc3 d6 3. Nf3 Nf6 4. d4 Be7 5. dxe5 dxe5 6. Qxd8+ Bxd8 7. Nxe5 O-O 8. Nd3 Nc6 9. f3 Re8 10. Be3 Be6 11. O-O-O Be7 12. Nc5 Bxc5 13. Bxc5 b6 14. Bb5 bxc5 15. Bxc6 Rab8 16. Bxe8 Rxe8 17. Nd5 c6 18. Nxf6+ gxf6 19. Rhe1 Rb8 20. g4 a5 21. b3 a4 22. bxa4 Bxa2 23. Rd6 c4 24. Kd2 c3+ 25. Kxc3 Be6 26. Rxc6 Ra8 27. a5 Rxa5 28. f4 Ra3+ 29. Kb4

[Assistant] Rf3


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

[User] 1. Nf3 b6 2. g3 Bb7 3. Bg2 Nf6 4. O-O e6 5. d3 Be7 6. Nbd2 O-O 7. c3 d6 8. Qc2 Nbd7 9. Re1 c5 10. e4 Rc8 11. Nf1 Qc7 12. Nh4 d5 13. f4 dxe4 14. dxe4 e5 15. Nf5 Nb8 16. fxe5 Qxe5 17. Bf4 Qe6 18. e5 Nd5 19. Bh3 Nxf4 20. gxf4 Rfe8 21. N1g3 Qc6 22. Nxe7+ Rxe7 23. f5 Rce8 24. e6 fxe6 25. fxe6 Na6 26. Rad1 c4 27. Bg2 Qxg2+ 28. Qxg2 Bxg2 29. Kxg2 Rxe6 30. Rxe6 Rxe6 31. Rd7 Nc5 32. Rxa7 h5 33. Kf3 h4 34. Nf5 Rf6 35. Kg4 g6

[Assistant] Nxh4


[System] You are a chess 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 g6 3. Bg5 Bg7 4. Bh4 Bg4 5. e3 Bxf3 6. Qxf3 Nd7 7. Bc4 Ngf6 8. c3 O-O 9. Nd2 a6 10. Bb3 b5 11. O-O c5 12. Rad1 c4 13. Bc2 Nb6 14. h3 d5 15. Rfe1 Rc8 16. a3 Nfd7 17. e4 dxe4 18. Nxe4 Nf6 19. Nxf6+ exf6 20. Re2 Qd5 21. Qe3

[Assistant] f5


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

[User] 1. d4 e6 2. c4 Nf6 3. Nf3 c5 4. Nc3 d5 5. cxd5 exd5 6. e3 Nc6 7. Be2 Be7 8. O-O O-O 9. b3 cxd4 10. Nxd4 a6 11. Bb2 Bd7 12. Bf3 Be6 13. Qd2 Ne5 14. Be2 Rc8 15. Rfd1 Qc7 16. Rac1 Qb8 17. Na4 Neg4 18. Bxg4 Nxg4 19. Nf3 b5 20. Nc3 Bf6 21. Nxd5 Bxd5 22. Bxf6 Nxf6 23. Rxc8 Rxc8 24. Qe2 Bxf3 25. Qxf3 Rd8 26. Rc1 Rc8 27. Rd1 Rd8 28. Rc1 h6 29. g3 Qd6 30. Rc6 Qd1+ 31. Kg2 Qxf3+ 32. Kxf3 Ra8 33. e4 Nd7 34. Ke3 Kf8 35. f4 Ke7 36. Kd4 Rd8 37. e5 Nb8+ 38. Kc5 Nxc6 39. Kxc6 Rd2 40. Kb6 Rxa2 41. Kb7 Ra3 42. Kb6 Rxb3 43. Kxa6 Rb2 44. Kb6 b4 45. Kb5 b3 46. Kc4 Rxh2 47. Kc3 Rg2 48. Kxb3 Rxg3+ 49. Kc4 Rf3 50. Kd5 Rxf4 51. Kc6 Re4 52. Kc7 Rxe5 53. Kc8 Re6 54. Kc7 Kf6 55. Kc8 h5 56. Kd8 h4 57. Kd7 h3 58. Kd8 h2

[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] FEN: r4r1k/pp2qp1p/1np1pp2/4P3/2P4Q/8/PP3PPP/3R1RK1 w - - 0 19

[Assistant] Rd3


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

[User] FEN: 4Brk1/Rb3pq1/3p1Rn1/4p1PQ/2p1P3/6P1/1rP4P/6K1 w - - 4 27

[Assistant] Rxb7


[System] You are a chess 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/Bp3pbp/2p5/3p2pP/6b1/2Pr4/PP2R1K1/8 w - - 0 28

[Assistant] Bc5+


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

[User] 1. d4 d6 2. c4 c5 3. d5 Nf6 4. Nc3 e5 5. e4 b5 6. cxb5 a6 7. bxa6 Be7 8. Nf3 Bxa6 9. Bxa6 Nxa6 10. O-O O-O 11. h3 c4 12. Qe2 Nc5 13. Qxc4 Qb6 14. Qe2 Rfb8 15. Be3 Qa5 16. a3 Nb3 17. Rfd1 Nxa1 18. Rxa1 Rb3 19. Bd2 Rab8 20. Rb1 Qa8 21. Qd1 Qb7 22. Qc2 Qc8 23. Nh4 g6 24. Nf3 Nh5 25. Bc1 Ng7 26. Qd2 Ne8 27. Qe2 Qd7 28. Qd1 Nc7 29. Qc2 Na6 30. Nd2 R3b7 31. Nc4 Nc5 32. Na5 Rb6 33. Nc6 Rxc6 34. dxc6 Qxc6 35. b4 Nb7 36. Qb3 Bd8 37. Nd5 Qd7 38. Bb2 Rc8 39. Rc1 Rxc1+ 40. Bxc1 Qc6 41. Be3 Qd7 42. Qc3 Qe6 43. Qc6 f5 44. Qxb7 fxe4 45. Nc7 Qd7 46. Qd5+ Kg7 47. Ne6+ Kg8 48. Nxd8+ Kg7 49. Ne6+ Kf7 50. Ng5+ Kg7 51. f4 exf3 52. gxf3 Qf5 53. Qf7+ Qxf7 54. Nxf7 d5 55. a4 d4 56. Bxd4 exd4 57. Kf1 d3 58. Ke1 Kxf7 59. Kd2 g5

[Assistant] Kxd3


[System] You are a chess 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. g3 Bb7 4. Bg2 e6 5. O-O Be7 6. c4 O-O 7. Nc3 Ne4 8. Bd2 d6 9. Rc1 Nd7 10. d5 Nxd2 11. Qxd2 e5 12. Ne1 f5 13. Nd3 Nf6 14. e4 Bc8 15. f4 fxe4 16. fxe5 exd3 17. exf6 Bxf6 18. Qxd3 Bd7 19. Be4 g6 20. Rf2 Kg7

[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] FEN: 3r4/1p3p1R/2b1pkp1/1p3P2/6PK/1BP1r3/PP3R2/8 b - - 0 29

[Assistant] g5+


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

[User] 1. Nf3 g6 2. d4 Bg7 3. Nc3 d6 4. e4 Nd7 5. Bg5 c6 6. Qd2 Qa5 7. O-O-O b5 8. e5 d5 9. Kb1 e6 10. h4 h6 11. Bf4 Ne7 12. Bd3 Rb8 13. b3 Qc7 14. Qe2 a6 15. g4 c5 16. dxc5 Nxc5 17. Kb2 b4 18. Nb1 a5 19. Be3 Bd7 20. Bd4 a4 21. Kc1 axb3 22. axb3 Nxb3+ 23. Kb2 Nxd4 24. Nxd4 Qxe5 25. Qxe5 Bxe5 26. Be2 Nc6 27. Rh3 Nxd4 28. Rxd4 Bxd4+ 29. Kc1 Ke7 30. Kd2 Rhc8 31. Rd3 Bc3+ 32. Kd1 Bf6 33. g5 hxg5 34. hxg5 Bxg5 35. f3 Bb5 36. Rb3 Bxe2+ 37. Kxe2 Rxc2+ 38. Kd3 Rc4 39. Nd2 Rbc8 40. Rb2 Rc3+ 41. Kd4

[Assistant] Be3+


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

[User] FEN: r4rk1/ppp2ppp/2n2n2/4B3/6b1/P1P1PN2/2P1BPPP/3RK2R b K - 2 11

[Assistant] Bxf3


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

[User] FEN: 8/8/8/3k1p2/5Pp1/2K1P2p/5P1P/8 b - - 1 66

[Assistant] Ke4


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

[User] FEN: 2br4/1r3pk1/B1p1p2p/R1P1N1p1/1n2n3/1Q2P1B1/1P3PPP/6K1 b - - 2 22

[Assistant] Nxa6


[System] You are a chess 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. d3 d5 3. Nd2 Nf6 4. Ngf3 dxe4 5. dxe4 e5 6. c3 Bc5 7. h3 Be6 8. Bb5

[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. f4 c5 2. Nf3 d5 3. g3 f5 4. Bg2 e6 5. O-O Nf6 6. d3

[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 d5 2. c3 c6 3. Bf4 e6 4. e3 Nd7 5. Nf3 c5 6. Bd3 c4 7. Bc2 f5 8. Nbd2 Ngf6 9. O-O Be7 10. h3 Ne4 11. Ne5 Nxe5 12. Bxe5 O-O 13. f3 Nxd2 14. Qxd2 Bf6 15. Bxf6 Qxf6 16. f4 Bd7 17. Qf2 a5 18. a3 b5 19. Qg3 Rfb8 20. Rfb1 Qe7 21. Qe1 b4 22. axb4 axb4 23. Rxa8 Rxa8 24. Ra1 Rb8 25. Qc1 b3 26. Bd1 Qd6 27. Bf3 Qb6 28. Ra3 Bc6 29. Qa1

[Assistant] Qd8


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

[User] 1. e4 Nf6 2. e5 Nd5 3. d4 b5 4. Bxb5 c5 5. c3 cxd4 6. cxd4 Qa5+ 7. Nc3 Nxc3 8. bxc3 Qxb5 9. Nf3 Ba6 10. a4 Qc4 11. e6 dxe6 12. Bd2 Nc6 13. Ne5 Nxe5 14. dxe5 Rd8 15. Qf3

[Assistant] g6


[System] You are a chess 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 d6 3. Bg5 f6 4. Bh4 Nc6 5. Bg3 g5 6. d5 Nce7 7. h3 h5 8. e4 Bd7 9. Bh2 f5 10. c4 f4 11. Nfd2 Bg7 12. f3 g4 13. Be2 g3 14. Bg1 h4 15. b4 Nf6 16. Nc3 O-O 17. Qb3 b6 18. c5 bxc5 19. bxc5 dxc5 20. Bxc5 Rb8 21. Qa3 a5 22. Bxe7 Qe8 23. Bxf8 Bxf8 24. Qxa5 Bb4 25. Qxc7 Bxc3 26. Qxc3 Rc8 27. Qb3 Ba4 28. Qb4 Rc2 29. Bd3 Rc8 30. O-O Bc2 31. Bxc2 Rxc2 32. Rac1 Rxa2

[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: 8/1p5p/5Qpk/3pP2r/4qP2/8/P1rB1R2/6K1 w - - 3 35

[Assistant] Qf8#


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

[User] FEN: 1r1r4/4kpQ1/p6p/4p3/8/3B2n1/PP3P1q/1K1R4 w - - 1 31

[Assistant] Qxe5+


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

[User] FEN: 2r1r1k1/p2p1pBp/1b2pPp1/8/P2nP2Q/8/B2R2PP/7K b - - 0 30

[Assistant] Rc1+


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

[User] 1. e4 e6 2. d3 d5 3. Nd2 d4 4. e5 c5 5. f4 Nc6 6. Ngf3 g6 7. g3 h5 8. Bg2 Nge7 9. O-O Nf5 10. Ne4 b6 11. Qe2 Bb7 12. c3 Be7 13. Kh1 Qc7 14. Bd2 a6 15. a3 a5 16. c4 Nd8 17. b4 Nc6 18. b5 Nd8 19. a4 Bxe4 20. Qxe4 Nb7 21. Ng5 Bxg5 22. fxg5 O-O-O 23. Rf4

[Assistant] Rd7