[System] You are a chess 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. Nf3 Qe7 4. Nc3 Nxe5 5. Nd5 Nxf3+ 6. gxf3 Qd8 7. Qd4 c6 8. Qe5+ Be7 9. Nc7+ Kf8 10. Nxa8 d6 11. Qd4 Nf6 12. Qxa7 g6 13. Nb6 Be6 14. Qxb7 Kg7 15. Qxc6 Qb8 16. Bg5 h6 17. Bh4 g5 18. Bg3 Rd8

[Assistant] Bg2


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

[User] 1. d4 d5 2. c4 c5 3. Nc3 cxd4 4. Qxd4 Nc6 5. Qxd5 Qxd5 6. cxd5 Nb4 7. Kd1 Nf6 8. e4 e6 9. a3 Na6 10. Bb5+ Bd7 11. dxe6 Bxb5 12. exf7+ Kxf7 13. Nxb5 Rc8 14. Be3 Bc5 15. Ke2 Rhd8 16. Nf3 Nxe4 17. Bxc5 Naxc5 18. Rhd1 Nb3 19. Rxd8 Rxd8 20. Re1 Rc8

[Assistant] Ke3


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

[User] FEN: r1bqk2r/ppp1b1p1/2np3p/4p3/4np1N/2NP4/PPPBBPPP/R2Q1RK1 w kq - 0 10

[Assistant] Bh5+


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bg5 h6 8. Bh4 g5 9. Bg3 Bg7 10. h3 Ne5 11. f3 Nbc6 12. Bf2 O-O 13. Qd2 Na5 14. h4 Nac4 15. Bxc4 Nxc4 16. Qc1 g4 17. b3 Qa5 18. bxc4 Qxc3+ 19. Kf1 Bxd4 20. Qxh6

[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. e3 c5 2. b3 d5 3. Bb2 Nf6 4. Nf3 e5 5. Be2 e4 6. Ne5 Nc6 7. Nxc6 bxc6 8. f3 Bd6 9. O-O O-O 10. f4 d4

[Assistant] exd4


[System] You are a chess 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 b6 4. Nf3 Bb7 5. Be2 g6 6. O-O Bg7 7. Nc3 O-O 8. d5 d6 9. e4 e5 10. dxe6 fxe6 11. Bd3 d5 12. cxd5 exd5 13. exd5 a6 14. Bg5 Nbd7 15. a4 Qc7 16. Bc4 Qd6 17. Bh4 Nh5 18. Re1 Rf4 19. Be7 Qb8

[Assistant] Qd3


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

[User] 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 a6 6. Bf4 Nc6 7. e3 Bg4 8. Bd3 e6 9. O-O Bd6 10. Bxd6 Qxd6 11. Rc1 O-O 12. a3 b5 13. b4 Rac8 14. Be2 Rfd8 15. Nd2 Bxe2 16. Qxe2 Ne7 17. Nb3 e5 18. Nc5 exd4 19. exd4 Nf5 20. Qe5 g6 21. Rcd1 Rc6 22. Rfe1 Re8 23. Qxd6 Rxe1+ 24. Rxe1 Rxd6 25. Ne2 Ne4 26. f3 Nd2 27. g4 Nh4 28. Kf2 Ndxf3 29. Rd1 Rf6 30. Kg3 g5 31. Nc3 Rd6 32. Rd3 Ne1 33. Re3 Nc2 34. Re5 h6 35. Rxd5 Rxd5 36. Nxd5 Nxd4 37. Nxa6 Nc2 38. a4 bxa4 39. b5 a3 40. Nc3 Nd4 41. b6 Nc6 42. b7 Ng6 43. Nb4 Nb8 44. Nb5 Ne7 45. Nxa3 Kg7 46. Nc4 f5 47. gxf5 Nxf5+ 48. Kg4 Ne7 49. Ne5 Kf6 50. Nbd3 Nec6 51. Nxc6 Nxc6 52. Kh5 Kg7 53. Nc5 Nb8 54. Ne6+ Kh7 55. Nxg5+ hxg5 56. Kxg5 Nc6 57. Kf6

[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. Nf3 b6 2. d4 Bb7 3. c4 Nf6 4. Nc3 e6 5. a3 d5 6. Bf4 Bd6 7. Bg3 Bxg3 8. hxg3 Nbd7 9. e3 O-O 10. Qc2 h6 11. O-O-O Qe7 12. Kb1 c5 13. cxd5 Nxd5 14. Nxd5 Bxd5 15. e4 Bb7 16. d5 exd5 17. exd5 Rfe8 18. d6 Qf6 19. Ka1 Rad8 20. Rh4 Ne5 21. Rf4 Qe6 22. Nxe5 Qxe5 23. Bc4 Rf8 24. Qg6 Rd7

[Assistant] Bb3


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

[User] 1. d4 e6 2. c4 Nf6 3. Nc3 a6 4. Bg5 b6 5. e4 Be7 6. e5 Ng8 7. Bxe7 Nxe7 8. Qg4 g6 9. Bd3 Bb7 10. h4 Nbc6 11. Nge2 d6 12. exd6 Qxd6 13. O-O-O O-O-O 14. Bc2 Nf5 15. d5 Ne5 16. Qf4 f6 17. g4 Nh6 18. Qxh6 Nxg4 19. Qf4 Qxf4+ 20. Nxf4 Nxf2 21. Nxe6 Rd7 22. Rhf1 Nxd1 23. Bxd1 f5 24. Ne2 Re7 25. N2d4 c6 26. Bf3 cxd5 27. cxd5 Kb8 28. Re1 Rc8+ 29. Kd2

[Assistant] Rce8


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

[User] 1. d4 Nf6 2. e3 c5 3. Nf3 b6 4. Bd3 Bb7 5. Qe2 d6 6. Nbd2 Nbd7 7. b3 g6 8. Bb2 Bg7 9. h3 O-O 10. c4 a6 11. Rd1 e6 12. e4 Rc8 13. O-O Rc7 14. Rfe1 Qa8 15. e5 dxe5 16. dxe5 Nh5 17. Be4 Nf4 18. Qe3 Bxe4 19. Nxe4 Nh5 20. g4 f5 21. gxh5 fxe4 22. Ng5 Bxe5 23. Nxe6 Bxb2 24. Nxc7 Qc8 25. Ne6 Ne5 26. Qxe4 Nf3+ 27. Kg2

[Assistant] Nxe1+


[System] You are a chess 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. Bf4 Bg7 3. e3 d6 4. Be2 Nf6 5. Nf3 O-O 6. O-O c5 7. c3

[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. Nf3 d5 2. d3 Nf6 3. c3 g6 4. Nbd2 Bg7 5. Qc2 O-O 6. e4 c5 7. Be2 dxe4 8. dxe4 Nc6 9. Nf1 Bg4 10. Ng3 Bxf3 11. gxf3 Qc7 12. Be3 b6 13. Qc1 Rfd8 14. Bh6 Ne5 15. Bxg7 Kxg7 16. h4 h5 17. Qg5 Kh7 18. Rg1 Qd6 19. Rd1 Qe6 20. b3 Rxd1+ 21. Bxd1 Rd8 22. Be2 Qd6 23. f4 Neg4 24. e5 Qd2+ 25. Kf1 Nd5 26. Nxh5 Qc1+ 27. Kg2 Nxf4+

[Assistant] Nxf4


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

[User] 1. d4 Nf6 2. Nf3 c5 3. e3 cxd4 4. exd4 d5 5. Bd3 Nc6 6. c3 g6 7. O-O Bg7 8. Re1 O-O

[Assistant] Nbd2


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

[User] 1. e4 d5 2. exd5 e6 3. d6 cxd6 4. Nc3 d5 5. g3 Nf6 6. Bg2 Be7 7. Nf3 O-O 8. O-O Nc6 9. d4 Rb8 10. Bf4 Bd6 11. Ne5 Bxe5 12. dxe5 Nd7 13. Re1 b5 14. Qe2 b4 15. Na4 Qa5 16. b3 Ba6 17. Qe3 Bb5 18. Nc5 Nxc5 19. Qxc5 Rfc8 20. Qe3 Ne7 21. h4 Nf5 22. Qd2 Qc7 23. Rac1 Qc3 24. Qxc3 Rxc3 25. Bd2 Rbc8 26. Bxc3 Rxc3 27. Bf1 Be8 28. Bd3 Nd4 29. Rf1 a5 30. Rfd1 Kf8 31. Kf1 Nc6 32. Bb5 Nxe5 33. Bxe8 Kxe8 34. Ke2 Nc6 35. Rd3 d4 36. Rxc3 bxc3 37. a3 Kd7 38. Kd3 e5 39. Kc4 Kd6 40. Kb5 Kd5 41. Re1 e4 42. b4 axb4 43. axb4 d3 44. Ka4 d2 45. Rd1 Nd4 46. b5 Kc5 47. Ka5 Nxb5 48. h5 Nd4 49. h6 gxh6 50. Rh1 Nxc2 51. Rh5+ Kd4 52. Rh1 Kd3 53. f3 Ne1 54. fxe4 d1=Q 55. Rh3 Kd2 56. g4 c2 57. Kb6 Kc1 58. Kc7 Qe2 59. Kd7 Nd3 60. Kd6 Qxe4

[Assistant] Kd7


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

[User] 1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Nf3 Nc6 5. e3 Ngxe5 6. Be2 d6 7. O-O g6 8. Nd4 Bg7 9. f4 Nxd4 10. exd4 Nc6 11. d5 Ne7 12. Nc3 O-O 13. Be3 h5 14. Bd4 Nf5 15. Bxg7

[Assistant] Kxg7


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

[User] 1. b3 b6 2. Bb2 Bb7 3. Nf3 e6 4. e3

[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. Nf3 g6 2. g3 Bg7 3. Bg2 Nf6 4. O-O O-O 5. d3 c5 6. c4 Nc6 7. Nc3 Rb8 8. a3 a6 9. Rb1 b5 10. cxb5

[Assistant] axb5


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

[User] FEN: 6k1/1bp1q3/p2p3b/Q2Pp1N1/5n1p/P6R/1P3PPN/4R1K1 b - - 0 31

[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. e4 e6 2. d3 d5 3. Nd2 Nf6 4. Ngf3 b6 5. g3

[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. e4 Nc6 2. Nc3 e5

[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: r1b1r1k1/2p2pb1/p3p1pp/8/1N1P1nPP/3BPq2/PPQ2P2/2K3RR w - - 0 18

[Assistant] Be4


[System] You are a chess 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. c4 Qd8 4. Nc3 Nf6 5. d4 e6 6. Nf3 c5 7. Be3 cxd4 8. Bxd4 Bd7 9. Bxf6 Nc6 10. Bxd8 Rxd8 11. Be2 Bb4 12. Qc2 Bd6 13. a3 Be7 14. O-O O-O 15. Rad1 h6 16. h3 Bf6 17. Ne4 Be7 18. Nd6 b6 19. b4 Nb8 20. c5 Bc6 21. Rfe1 Bd5 22. Ne5 Bf6 23. Bf3 Bxf3

[Assistant] Nxf3


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

[User] FEN: 8/3B4/2Pk1p2/6pp/6P1/7b/5K2/8 w - - 1 39

[Assistant] gxh5


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

[User] 1. d4 d5 2. Nf3 c6 3. Bg5 Nf6 4. Bxf6 exf6 5. e3 Bd6 6. Bd3 O-O

[Assistant] Nbd2


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

[User] FEN: 8/8/1p6/p3k1pp/1PP1P3/5K1P/8/8 w - - 0 41

[Assistant] c5


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

[User] 1. g3 Nf6 2. Bg2 g6 3. e4 Bg7 4. e5 O-O 5. exf6 Bxf6 6. Ne2 d5 7. O-O c5 8. d4 c4 9. c3 Nc6 10. h3 Bf5 11. Nd2 Qd7 12. g4 Bd3 13. Re1 e5 14. dxe5 Nxe5 15. Nf4 d4 16. cxd4 Qxd4 17. Nf3 Nxf3+ 18. Qxf3 Rae8 19. Rd1 Bg7 20. Nxd3 cxd3 21. Be3 Qxb2 22. Rab1 Qxa2 23. Rxb7 a5 24. Rxd3 a4 25. Kh2 a3 26. h4 Qa1 27. Ra7 a2 28. Rd2 Qe5+ 29. Kh3 a1=Q 30. Rxa1 Qxa1 31. g5 Qe5 32. Qg4 Qe6 33. Qxe6 Rxe6 34. Bd5 Re7 35. Bc5 Rfe8 36. Bxe7 Rxe7 37. Kg2 Be5 38. Rd3 Kg7 39. Re3 Bd6 40. Rxe7 Bxe7 41. f4 Bd6 42. Kf3 Be7 43. Kg4 Bd6 44. h5 gxh5+ 45. Kxh5 Bxf4 46. Be4 Bd2 47. Bf5 Be3 48. Be4 Bd2 49. Bf5 h6 50. gxh6+ Bxh6 51. Be4 Bf4 52. Kg4 Bd2 53. Kf5 Be3 54. Bd5 Bd2 55. Bc6 Bc3 56. Bd7 f6 57. Bc6 Kh6 58. Bb5 Kh5 59. Bc4 Kh4 60. Bd5 Kg3 61. Be6 Kf2 62. Bf7 Ke3 63. Bg6 Kd4 64. Bf7 Kc5 65. Be6 Kd6 66. Bf7 Bd4 67. Bg6 Be5 68. Bh5 Kc5 69. Bg4 Kd4 70. Bh5 Ke3

[Assistant] Bg6


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

[User] 1. e4 c6 2. c3 d5 3. e5 Bf5 4. d4 Bxb1 5. Rxb1 e6 6. f4 Be7 7. Nf3 g6 8. Bd3 h5 9. O-O Nh6 10. c4 Nd7 11. Be3 Nb6 12. b3 Qd7 13. Bf2 Rd8 14. a4 Ng4 15. Be1 Nf2 16. Bxf2 dxc4 17. bxc4 O-O 18. a5 Na8 19. Qc2 Kg7 20. Ng5 Bxg5 21. fxg5 Qe7 22. Be3 b6 23. Rf6 c5 24. Rbf1 cxd4 25. Bc1 Qc5 26. Bxg6 Qxe5 27. Rxf7+ Rxf7 28. Rxf7+ Kg8 29. h4

[Assistant] d3


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

[User] 1. e4 d5 2. exd5 Nf6 3. Nf3 Qxd5 4. d4 Bg4 5. Be2 Nc6 6. h3 Bxf3 7. Bxf3 Qd7 8. c3 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] 1. e4 e5 2. Nf3 Nc6 3. d4 Nf6 4. dxe5 Nxe4 5. Be3 Bb4+ 6. c3 Be7 7. Nbd2 Nxd2 8. Qxd2 O-O 9. Bc4 d5 10. exd6 Bxd6 11. O-O-O Bg4 12. Bb3 Qf6 13. h3 Bxf3 14. gxf3 Qxf3 15. Rdg1 Rad8 16. Qe1 Bf4 17. Bc2 Bxe3+ 18. fxe3 Rfe8 19. Rg3 Qf6 20. Rhg1 Ne5 21. Qe2 Ng6 22. h4 Qxh4 23. Rg4 Qe7

[Assistant] Bxg6


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

[User] FEN: r3kb1r/p1p2ppp/n2qpn2/2ppN3/3P4/4P3/PPQ2PPP/RNB1K2R w KQkq - 0 10

[Assistant] Qa4+


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. O-O Nf6 5. d4 d6 6. dxe5 dxe5 7. Qxd8+ Bxd8 8. Nc3 a6 9. h3 h6 10. Be3 Be6 11. Bxe6 fxe6 12. Rad1 Be7 13. Rd2 Rd8 14. Rfd1 Rxd2 15. Rxd2 Kf7 16. Kf1 Rb8 17. Ke2 b5

[Assistant] a3


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

[User] FEN: 8/p1p5/3k4/1p4K1/1Pr2p2/P4P2/2R3P1/8 w - - 5 41

[Assistant] Rxc4


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

[User] FEN: 8/1pR2pk1/1r4p1/3P2P1/p5B1/1nP2P2/KP5r/3R4 b - - 0 32

[Assistant] Nc1+


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

[User] FEN: 3r2kr/pRp2ppb/4P3/3p1n1p/3P3q/B3QP1P/P5P1/1R4K1 w - - 1 27

[Assistant] exf7+


[System] You are a chess 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/pp3p1p/4p1p1/2Pp3q/N7/3QP1P1/PPP2P1b/R4R1K w - - 1 18

[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/b3p3/P2p1qpk/2pP4/4P3/4K3/4Q1R1 b - - 3 48

[Assistant] c3+


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

[User] 1. d4 e6 2. c4 d5 3. Nc3 c6 4. cxd5 exd5 5. e4 dxe4

[Assistant] Nxe4


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

[User] 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4 4. d3 c6 5. a3 Ba5 6. b4 Bb6 7. Bb3 d5 8. exd5

[Assistant] Bd4


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

[User] 1. b3 Nf6 2. Bb2 g6 3. d4 Bg7 4. Nf3 d6 5. e3 c6 6. Be2 Bg4 7. O-O Bf5 8. c4 d5 9. Nc3 Nbd7 10. Ne5 Rc8 11. f4 Ne4 12. Rc1 Nxc3 13. Bxc3 dxc4 14. Bxc4 O-O 15. Qe2 Be4 16. Bd3 Bxd3 17. Qxd3 f6 18. Nxd7 Qxd7 19. Qc4+ Kh8 20. Bb4 Rfe8 21. Qc5 b6 22. Qc2 e5 23. fxe5 fxe5 24. Rfd1 e4 25. Be1 Qd5 26. Bg3 Red8 27. Qc4 Qd7 28. Qc2 h6 29. Qxe4 Kh7 30. h4 c5 31. h5 Qf7 32. hxg6+ Qxg6 33. Qxg6+ Kxg6 34. dxc5 Rxd1+ 35. Rxd1 Rxc5 36. Rd6+ Kh7 37. Rd1 Rc1 38. Rxc1 Bf6 39. Rc7+ Bg7 40. Rxa7 Kg6 41. Rc7 Kf5 42. Be5 Kxe5 43. Rxg7 Ke4 44. Rh7 Kd3 45. Rxh6 Kc3 46. Rxb6 Kb2 47. Rc6 Kxa2 48. Rc4 Kb2 49. e4 Ka3 50. Rd4 Kxb3 51. Rd5 Kc3 52. e5 Kb3 53. e6 Kb2 54. e7 Kc2

[Assistant] Rd7


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

[User] 1. d4 c5 2. d5 Nf6 3. c4 b5 4. cxb5 a6 5. b6 g6 6. Nc3 Bg7 7. e4

[Assistant] d6


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

[User] FEN: 8/8/6k1/2r1R3/ppP1Kp2/1P3P2/1P4P1/8 b - - 0 44

[Assistant] Rxe5+


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

[User] 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nf3 b6 5. Nbd2 Be7 6. Bd3 O-O 7. c3 Ba6 8. Bb1 c5 9. Ne5

[Assistant] h6


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

[User] 1. e3 d6 2. d4 e5 3. dxe5 dxe5 4. Qxd8+ Kxd8 5. Bc4 Ke8 6. Nc3 c6 7. Nf3 Nd7 8. Bd2 f6 9. O-O-O Bb4 10. a3 Ba5 11. b4 Bb6 12. Na4 Bc7 13. Bb3 Ne7 14. Bc3 a5 15. Nb2 a4 16. Nxa4 b5 17. Nc5 Nb6 18. Bb2 Nc4 19. Bxc4 bxc4 20. Nd2 Bb6 21. Nxc4 Bxc5 22. bxc5 Ba6 23. Nb6 Rb8 24. Bc3 Bb5 25. Bb4 Nd5 26. Nxd5 cxd5 27. Rxd5 Kf7 28. Rhd1 Kg6 29. g3 Rhc8 30. Rd6 Bc6 31. R1d2 Be4 32. h4 h5 33. Rd7 Rc6 34. Ra7 Rbc8 35. Rdd7 Rxc5 36. Rxg7+ Kf5 37. Bxc5 Rxc5 38. Rac7 Ra5 39. Kb2 Rb5+ 40. Kc3 Ra5 41. Kb4 Rd5 42. Rc3 Rd2 43. Rgc7 Rxf2 44. a4 Rf3 45. a5 Rxg3 46. a6 Rg8 47. a7 Bf3 48. Kb5 Ke4 49. R7c4+ Kf5 50. Kb6 Rg1 51. Ra4 Rb1+ 52. Rb3 Rc1 53. a8=Q Bxa8 54. Rxa8 Rxc2 55. Rh8 Kg4 56. Rb4+ Kf3 57. Rxh5 Kxe3 58. Rf5 e4 59. Rxf6 Rh2 60. Re6 Rxh4 61. Kc5 Kd3 62. Rd4+ Ke3 63. Re5 Kf3 64. Rf5+ Ke3 65. Kd5 Rh8 66. Rxe4+ Kd3 67. Rf3+ Kd2 68. Rg4 Rd8+ 69. Ke4 Re8+ 70. Kf4 Rf8+ 71. Kg3 Rh8 72. Kg2 Ke2 73. Rgg3 Kd2 74. Rf2+ Ke1 75. Ra2 Rd8 76. Kg1 Rd2 77. Rxd2 Kxd2 78. Kg2 Ke1

[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] 1. e4 g6 2. Nc3 Bg7 3. f4

[Assistant] c5


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

[User] 1. e4 c5 2. Nf3 e6 3. c3 a6 4. d4 d5 5. exd5 Qxd5 6. h3 Nf6 7. Be2 Nc6 8. O-O cxd4 9. cxd4 Bb4 10. Nc3 Qd8 11. a3 Bd6 12. Be3 O-O 13. Rc1 Bd7 14. Re1 Rc8 15. Qd2 Ne7 16. Ne5 Ned5 17. Nxd7

[Assistant] Qxd7


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

[User] 1. Nf3 Nf6 2. d4 e6 3. e3 c5 4. Bd3 b6 5. O-O Bb7 6. c4 cxd4 7. exd4 d5 8. Nc3

[Assistant] Be7


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

[User] 1. b3 e6 2. Bb2 d5 3. f4 Nf6 4. e3 c5 5. Nf3 a6 6. g3 Nc6 7. Bg2 Bd6 8. O-O O-O 9. Qe2 Qc7 10. d4 cxd4 11. exd4 Re8 12. c3 Ne4 13. Nbd2 Nxd2 14. Qxd2 f6 15. Rfe1 e5 16. dxe5 fxe5 17. fxe5 Nxe5 18. Nxe5 Bxe5 19. Qxd5+ Kh8

[Assistant] Rad1


[System] You are a chess 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. Nf3 b6 5. e3 Bb7 6. Be2 Ne4 7. Qc2 O-O 8. O-O Bxc3 9. bxc3 f5 10. a4 a5 11. Ba3 d6 12. Rab1 Nd7 13. Nd2 Nxd2 14. Qxd2 Be4 15. Rb2 Qg5 16. f3 Bc6 17. c5 dxc5 18. dxc5 Rfd8 19. Qc1 Nxc5 20. Bxc5 bxc5 21. Bb5 Bd5 22. c4 c6 23. cxd5 cxb5 24. dxe6 b4 25. Qxc5 Rac8 26. Qe5 Re8

[Assistant] f4


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

[User] FEN: r7/3p1Qpk/1n2p2p/4P3/1q1PN3/8/6PP/5RK1 w - - 3 39

[Assistant] Nf6+


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

[User] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. g3 O-O 14. h4 g6 15. h5 Bg5 16. Bh3 Be6 17. hxg6 hxg6 18. Kf1

[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. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Na3 Qb6 7. Nc2 cxd4 8. cxd4 Rc8 9. Bd3 Nb4 10. Nxb4 Bxb4+ 11. Bd2 Ne7 12. Bxb4 Qxb4+ 13. Qd2 Qxd2+ 14. Kxd2 Nc6 15. Rac1 h6 16. Rc5 b6 17. Rc3 Ke7 18. Rhc1 Nb4 19. Rxc8 Rxc8 20. Rxc8 Bxc8 21. Bb1 Bd7 22. a3 Nc6 23. b4 Nb8 24. Kc3 a6 25. Bd3 Kd8 26. h3 Kc7 27. Nd2 a5 28. f4 Nc6 29. b5 Na7 30. a4 Nc8 31. g3 Ne7 32. g4 Kd8 33. Nf3 Ke8 34. Nh4 Kf8

[Assistant] Nf3


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f4 d5 5. e3 c5 6. Nf3 Nc6 7. Be2 cxd4 8. exd4 dxc4 9. O-O O-O 10. Bxc4 b6 11. Be3 Bb7 12. Qe2 Ne7 13. Ne5 Nf5 14. Rad1 Rc8 15. a3 Nxe3 16. Qxe3 Bxc3 17. bxc3

[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 Nf6 2. Nf3 g6 3. c4 Bg7 4. g3 d5 5. Bg2 O-O 6. O-O Ne4 7. Nbd2 Nxd2 8. Bxd2 c6 9. Bc3 h6 10. Ne5 Be6 11. cxd5 cxd5 12. e4 dxe4 13. Bxe4 Bd5 14. Qf3 e6 15. Bxd5 Qxd5 16. Qxd5 exd5 17. Kg2 Rc8 18. Rac1 Nc6 19. f4 f6 20. Nxc6 Rxc6 21. f5 Kf7 22. Bb4 Rac8 23. Rc3 Rxc3 24. bxc3 g5 25. Rb1 b6 26. Rc1 h5 27. Kf3 g4+ 28. Ke2 Bh6 29. Rc2 Re8+ 30. Kf2 Rc8 31. a4 Bf8 32. Bxf8 Kxf8 33. Ke3 Rc4 34. Kd3 Rxa4

[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. g4 c6 2. Bg2 d5 3. c4 Bxg4 4. Qb3 Qc8 5. cxd5 cxd5 6. Nc3 Nf6 7. Nxd5 Nc6 8. Nxf6+ exf6 9. d3 Qd7 10. Be3 Be7 11. Nf3 O-O 12. Rc1 Be6 13. Qc2 Rac8 14. Qd1 Rfd8 15. a3 Na5 16. Rxc8 Rxc8 17. O-O Nb3 18. d4 Bd5 19. Nd2 Rc1

[Assistant] Qxc1


[System] You are a chess 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/pp3prp/3N3Q/2q1p3/4B3/8/PPn1p2P/R6K w - - 0 30

[Assistant] Qf6


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

[User] 1. e4 c5 2. Nc3 e6 3. Nf3 Nc6 4. d4 cxd4 5. Nxd4 a6 6. Be3 Nf6 7. Bd3 Be7 8. Qd2 Qc7 9. f4 d5 10. e5 Nd7 11. O-O-O f6 12. exf6 Nxf6 13. Rhe1 Ne4 14. Bxe4

[Assistant] dxe4


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

[User] FEN: 8/8/5R2/8/5b2/5kpp/8/7K b - - 0 63

[Assistant] g2+


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Be3 Nf6 7. Bc4 O-O 8. Bb3 d6 9. f3 Bd7 10. Qd2 Nxd4 11. Bxd4 b5 12. h4 a5 13. h5 a4

[Assistant] Bd5


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

[User] FEN: 8/7p/5K2/8/6p1/6P1/8/k7 w - - 0 57

[Assistant] Kg5


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

[User] FEN: 5R2/6K1/7P/8/7r/4k3/5p2/8 b - - 5 59

[Assistant] Rg4+


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

[User] 1. c4 f5 2. Nf3 Nf6 3. e3 g6 4. d4 Bg7 5. Be2 d6 6. O-O O-O 7. Nc3 c6 8. d5 e5 9. dxc6 Nxc6 10. b3 Be6 11. Ba3 Ne8 12. Rc1 Kh8 13. e4 f4 14. Nd5 Rf7 15. c5 Bf8 16. cxd6 Bxd6 17. Bxd6 Qxd6 18. Qd2 Rd8 19. Rfd1 h6 20. Nh4 Kh7 21. b4 Rfd7 22. Bc4 Nd4 23. Qb2 a6 24. a4 b5 25. axb5 axb5 26. Ba2 Qf8 27. Nf3 g5 28. Nxd4 exd4 29. Rxd4 Nf6 30. Nxf6+ Qxf6 31. Rxd7+ Rxd7 32. Qxf6 Bxa2 33. Re1 Rf7 34. Qe5 Bc4 35. h4 Kg6 36. h5+ Kh7 37. Qe8 Kg7

[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: rn1q1r2/pbp2pp1/1p4k1/6N1/5n1P/8/PBP2PP1/R2Q1RK1 w - - 2 16

[Assistant] Qg4


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

[User] 1. d4 d5 2. c4 Nf6 3. Nc3 e6 4. cxd5 Be7 5. dxe6 Bxe6 6. e4 Kf8 7. e5 Nd5 8. Nf3 Nxc3 9. bxc3 c6 10. Bd3 Nd7 11. O-O Nb6 12. Re1 Nd5 13. Bd2 Rc8 14. Qe2 b6 15. a4 c5 16. a5 cxd4 17. cxd4 Bb4 18. axb6 axb6 19. Ng5 g6 20. Ne4 Kg7 21. Bg5 Be7 22. h4 h6 23. Bxe7 Qxe7 24. g3 Nc3 25. Nxc3 Rxc3 26. Qe4 Rhc8 27. Bf1 Bf5 28. Qe2 Rc2 29. Qb5 g5 30. hxg5 Qxg5 31. Qxb6 Rd2 32. Rac1 Rdc2 33. Rxc2 Rxc2 34. Qb3 Qd2 35. Qe3 Qxe3 36. Rxe3 Rd2 37. Kg2 Rxd4 38. Kf3 Be6 39. Ke2 Ra4 40. f4 Ra2+ 41. Kf3 Bd5+ 42. Kg4 Be6+ 43. f5 Ra4+ 44. Kf3 Bxf5 45. Be2 Be6 46. Kf2 h5 47. Bf3

[Assistant] Bg4


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Qd2 Nc6 8. f3 O-O 9. Bc4 Ne5 10. Bb3 Bd7 11. O-O-O Qa5 12. h4 Rfc8 13. h5 Nxh5 14. Nd5 Qxd2+ 15. Rxd2 Kf8 16. g4 Bxg4 17. fxg4 Nxg4 18. Bg5 e6 19. Nxe6+ fxe6 20. Rf1+ Ke8 21. Ba4+ Rc6 22. Bxc6+ bxc6 23. Nc7+ Kd7 24. Nxa8 Ne5 25. a4 h6 26. Be3 Nf6 27. Bd4 Nxe4 28. Bxe5 Bxe5 29. Rf7+ Ke8 30. Rxa7 Nxd2 31. Kxd2 g5 32. a5 g4 33. Ke2 g3 34. Rh7

[Assistant] Bd4


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

[User] 1. Nf3 g6 2. d3 Bg7 3. Nbd2 d6 4. e4 Nc6 5. Be2 e5 6. O-O f6 7. Re1 f5 8. Nf1 Nf6 9. exf5 gxf5 10. Bg5 O-O 11. Nh4 Qe8 12. Ng3 h6 13. Bxf6 Rxf6 14. Bh5 Qe6 15. c3 Bd7 16. Qb3

[Assistant] Qxb3


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

[User] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. e3 e6 6. Bd3 Bg4 7. h3 Bh5 8. g4 Bg6 9. Bxg6 hxg6 10. c5 Ne4 11. Nxe4 dxe4 12. Nd2 Nd7 13. Nxe4 f5 14. gxf5 exf5 15. Nc3 Be7 16. d5 cxd5 17. Qxd5 Bf6 18. Bd2 Ne5 19. O-O-O Qxd5 20. Nxd5 O-O 21. Bc3 Nf3 22. Nxf6+ gxf6 23. Rd7 Rf7 24. Rhd1 Raf8 25. b4 Kg7 26. b5 Ne5 27. c6 Nxd7 28. cxd7 Rd8 29. Bxf6+

[Assistant] Kxf6


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

[User] FEN: r1bb2r1/pp1n3k/3p2q1/1Q1Pp2p/1P2Pp2/PN3PpP/1B4P1/2R1R1NK w - - 4 27

[Assistant] Rxc8


[System] You are a chess 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. c4 f5 5. e3 d6 6. Nc3 Nd7 7. Nge2 Nf6 8. g3 h5 9. h4 Bh6 10. Bg2 O-O 11. O-O Re8 12. Qc2 Ng4 13. Rad1 g5 14. hxg5 Qxg5 15. Nd5 Qd8 16. Ndf4 h4 17. gxh4 Qxh4 18. Nh3 f4 19. Nexf4 Kh8 20. Qe2 Bxf4 21. Qf3 Bh2+ 22. Kh1 Be6 23. d5 Ne5 24. Qe4

[Assistant] Qxe4


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

[User] FEN: 8/4b3/8/1b5p/1p1pNK1k/pP1n4/P1BB4/8 w - - 0 54

[Assistant] Bxd3


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Nc6 6. Nf3 a6 7. Bg5 Bxc5 8. e3 h6 9. Bh4 O-O 10. a3 Be7 11. Be2 b6 12. O-O Bb7 13. Rfd1 Qc7 14. Bg3 d6 15. Rac1 Rac8 16. Nd5 exd5 17. cxd5 Qd7 18. dxc6 Rxc6 19. Qb3 Rxc1 20. Rxc1 b5 21. Nd4 Bd5 22. Qb4

[Assistant] Ne4


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

[User] 1. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. O-O Bg4 5. d3 Nbd7 6. Nbd2 e5 7. c3 Bc5 8. Qc2 O-O 9. e4 dxe4 10. dxe4 a5 11. a4 Qc7 12. b3 Rfd8 13. Ba3 Bxa3

[Assistant] Rxa3


[System] You are a chess 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. Nf3 Bg7 4. O-O O-O 5. d4 d5 6. c3 c6 7. Ne5 Nbd7 8. f4 Ne8 9. e4 f6 10. Nxd7 Qxd7 11. e5 e6 12. Nd2 f5 13. Nf3 b6 14. h3 Ba6 15. g4 Bxf1 16. Qxf1 fxg4 17. hxg4 h6 18. Qf2 g5 19. fxg5 hxg5 20. Bxg5 Qf7 21. Qh4 Qg6 22. Rf1 Nc7 23. Be3 Rf7 24. Ng5 Rxf1+ 25. Bxf1 Rf8 26. Be2 Qb1+ 27. Kg2 Qg6 28. Nf3 c5 29. Qh5 Qxh5 30. gxh5 cxd4 31. cxd4 Nb5 32. Bxb5 Rc8 33. Bd3 Bf8 34. h6 Kh8 35. Ng5 Rc7 36. Nxe6

[Assistant] Rf7


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

[User] 1. e3 d6 2. d4 Nf6 3. Nf3 g6 4. Be2 Bg7 5. O-O O-O 6. b3 c6

[Assistant] Bb2


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

[User] 1. d3 c6 2. e4 d6 3. Nc3 e6 4. g3 Nf6 5. Bg2 Be7 6. Nge2 O-O 7. O-O d5 8. f4 dxe4 9. dxe4 Qxd1 10. Rxd1 Na6 11. Be3 c5 12. a3 b6 13. e5 Nd5 14. Nxd5 exd5 15. Bxd5 Rb8 16. Bc4 Bb7

[Assistant] c3


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

[User] FEN: 2kr3r/1pp3p1/p3p3/3pPp2/4b3/PP2b1PP/1BP1Q2K/R4R2 b - - 1 22

[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: 5q2/3r4/5p1k/1p1b1P2/p1pPp1QP/4P3/7K/6R1 w - - 0 41

[Assistant] Qg6#


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

[User] 1. d4 d5 2. Nf3 Nf6 3. c3 e6 4. Bf4 Bd6 5. Bxd6 cxd6 6. e3 O-O 7. Nbd2 Ne4 8. Nxe4 dxe4 9. Nd2 f5 10. f3 d5 11. f4 Qh4+

[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: r4k1r/p4p1p/2p5/2b2qp1/2QNn2B/8/PPP2PPP/R4RK1 b - - 0 17

[Assistant] Qd5


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

[User] 1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 e3 5. Bc4 c6 6. Bxe3 Nbd7 7. Qd2 e5 8. dxe5 Nxe5 9. Qxd8+ Kxd8 10. O-O-O+ Ke8 11. Bb3 Be7 12. Nge2 Be6 13. Rhe1 Bxb3 14. axb3 Rd8 15. Nd4 Ng6 16. Nf5 Rxd1+ 17. Kxd1 Kf8 18. Nxe7 Nxe7 19. Bc5 Ng8 20. Nb5 cxb5 21. c4 bxc4 22. bxc4 f6 23. b4 Kf7 24. Bd6 h5 25. c5 h4 26. b5 Rh5 27. Kc2 Rd5 28. Kb3 b6 29. Kc4 bxc5 30. Bxc5 Rd7 31. Kb4 Nf5 32. Ka5 Nge7 33. Ka6 Nd5 34. Bxa7 Nc7+ 35. Kb7 Nxb5+ 36. Kc6 Rxa7 37. Kxb5 Ra2 38. g4 hxg3 39. hxg3 Nd4+ 40. Kc4 Nxf3 41. Re3 Ne5+ 42. Kd5 Rg2 43. Rc3 g5 44. Rc7+ Kg6

[Assistant] Rc3


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

[User] 1. d4 c6 2. Nc3 d5 3. Bg5 Nf6 4. Qd2 e6 5. f3 Bb4 6. e4 Bxc3 7. bxc3 dxe4 8. fxe4 Nxe4 9. Bxd8 Nxd2 10. Bc7 Ne4 11. Bxb8 Rxb8 12. c4 Nd6 13. c5 Nf5 14. Bd3 Nxd4 15. Rd1 Nf5 16. Nf3 O-O 17. O-O b6 18. Ng5 h6 19. Ne4 bxc5 20. Nxc5 Rb2 21. g4 Ne7 22. Rf2 Nd5 23. Rdf1 Rxa2 24. h4 Nb4 25. g5 Nxd3 26. Nxd3 Ra5 27. gxh6 gxh6 28. Rg2+ Kh7 29. Kh2 f5 30. Rfg1 Rb5 31. Rg7+ Kh8 32. Nf4 Rb7 33. Nh5

[Assistant] Rxg7


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

[User] 1. c4 c6 2. e4 Nf6 3. e5 Ng8 4. d4 d6 5. f4 Bf5 6. Nf3 e6 7. Nc3 d5 8. Be3 dxc4 9. Bxc4 Nd7 10. O-O Nb6 11. Bb3 Bb4 12. a3 Bxc3 13. bxc3 Ne7 14. c4 O-O 15. Qe2 Ng6 16. Nd2 Re8 17. g4 Nh4 18. gxf5 Nxf5 19. Nf3 a5 20. Rad1 a4 21. Ba2 g6 22. Rb1 Qc7 23. d5 Nd7 24. d6 Qc8 25. c5 Ra5

[Assistant] Rfc1


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

[User] 1. g3 c6 2. Bg2 d5 3. c4 Nf6 4. Nf3 dxc4 5. Na3 b5 6. Ne5 Bb7 7. Nxb5 Qa5 8. a4 e6 9. Nxc4 Qd8 10. Nc3 Nd5 11. O-O Nd7 12. d4 Be7 13. a5 O-O 14. a6 Bc8 15. e4 Nxc3 16. bxc3 Nb6 17. Ne5 Qc7 18. Bf4 Bd6 19. Nd3 Bxf4 20. Nxf4 Nc4 21. Qh5 g6 22. Qh6 e5 23. Nd3 Be6 24. f4 f6 25. f5 Bf7 26. fxg6 Bxg6 27. Bh3 Kh8 28. Bf5 Bxf5 29. Rxf5 exd4 30. cxd4 Qd7 31. d5 cxd5 32. Rxd5 Qf7 33. Rf1 Ne3 34. Qxe3

[Assistant] Qe6


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

[User] 1. Nf3 d6 2. g3 Nd7 3. Bg2 Ngf6 4. O-O g6 5. d3 Bg7 6. e3 O-O 7. e4 e5 8. d4 Qe7 9. d5 c6 10. c4 cxd5 11. cxd5 Nxe4 12. Nc3 Nxc3 13. bxc3 Nf6 14. c4 Qc7 15. Bg5 Qxc4 16. Rc1 Qa6 17. Qd2 Bf5 18. Bh6 Ne4 19. Bxg7 Nxd2 20. Bxf8 Nxf1 21. Bh6 Nxg3 22. hxg3 Qxa2 23. Nh4 Bd7 24. Rc7

[Assistant] Qa4


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

[User] 1. d4 e5 2. dxe5 Nc6 3. Nf3 Qe7 4. Bf4 Qb4+ 5. Bd2 Qxb2 6. Nc3 Nb4 7. Nd4 c6 8. Rb1 Qa3 9. e4 d6 10. exd6 Bxd6 11. Rb3 Qa5 12. a3 Na6 13. Ncb5 Qd8 14. Nxd6+ Qxd6 15. Rd3 Nc5 16. Bc3 Nxd3+ 17. Bxd3 Nf6 18. O-O O-O 19. f4 Qc5 20. Bb2 Rd8 21. Qa1 Ng4 22. Kh1 Qh5 23. Nf3 f6 24. e5 Be6 25. exf6 Nxf6 26. Bxf6 gxf6 27. Qxf6 Qf7 28. Bxh7+

[Assistant] Qxh7


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

[User] FEN: 4r1k1/p5pp/1p3n2/8/1q3B2/3Q1P2/PP3P1P/2R3K1 b - - 6 24

[Assistant] Qxf4


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

[User] 1. d4 d5 2. c4 dxc4 3. e3 e5 4. Bxc4 exd4 5. exd4 Nf6 6. Nf3 Bd6 7. O-O O-O

[Assistant] Nc3


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

[User] FEN: 6k1/2pq1ppp/8/4P3/1p1P2P1/2r2Q2/4RPPK/8 w - - 0 35

[Assistant] Qa8+


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

[User] FEN: 8/8/p7/4p1kP/P3P1p1/8/1P2K3/8 b - - 2 39

[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] FEN: 1k1r4/pp3RR1/2p1Q1P1/4p2p/3qn3/1P6/P1PP4/1K6 b - - 4 36

[Assistant] Nxd2+


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

[User] 1. d4 c5 2. Nf3 cxd4 3. Nxd4 Nf6 4. c4 Nc6 5. Nc3 Nxd4 6. Qxd4 g6 7. g3 Bg7 8. Bg2 d6 9. O-O O-O 10. Qd3 Rb8 11. Bd2 Bf5 12. e4 Be6 13. Rac1 Rc8 14. b3 a6 15. Rfd1 Nd7 16. h3 Nc5 17. Qe2 Qa5 18. Rc2 Qc7 19. Rdc1 Qd8 20. Nd5 Nd7 21. Bg5 Re8 22. h4 h6 23. Bf4 Ne5 24. Qd2 Kh7 25. Be3 Nc6 26. Bb6 Qd7 27. Be3 Ne5 28. Nb6 Qd8 29. Nxc8 Qxc8

[Assistant] c5


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

[User] 1. d4 e5 2. d5 Nf6 3. c4 Bc5 4. Nc3 O-O 5. e4 d6 6. Be2 c6 7. Nf3 cxd5 8. cxd5 a6 9. O-O b5

[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. c4 e6 2. d4 d5 3. Nc3 dxc4 4. e3 Nf6 5. Bd3 c6 6. Bxc4 b5 7. Bd3 a5 8. Nf3 b4 9. Ne4 Ba6 10. Bxa6 Nxe4 11. Bd3 Nf6 12. O-O Bd6 13. Re1

[Assistant] Nbd7


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

[User] 1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nc2 d5 6. cxd5 Qxd5 7. Qxd5 Nxd5 8. g3 Nc6 9. Bg2 Nb6 10. O-O Be6 11. Rd1 Be7 12. Nc3 O-O 13. e4 Rfd8 14. Nd5 Nxd5 15. exd5 Nb4 16. Nxb4 Bxb4 17. Be3 Bf5 18. Rac1 Rd7 19. a3 Bd6 20. b4 b6 21. Rc6 Rad8 22. Rdc1 e4 23. f3 exf3 24. Bxf3 Be5 25. Rc8 h6 26. Rxd8+ Rxd8 27. Bf4 Bxf4

[Assistant] gxf4


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

[User] FEN: r1bqr1k1/bpp2pp1/p1n4p/3n4/1PBp4/P1P2N1P/5PP1/RNBQR1K1 w - - 0 13

[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. e4 c5 2. Nf3 Nc6 3. Nc3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Nxc6 bxc6 7. Bd3 e5 8. O-O Be7 9. Qe2 Be6 10. Be3 d5 11. exd5 cxd5 12. Bg5 d4 13. Ne4 Nxe4 14. Qxe4 Bxg5 15. f4 Bd5 16. Qxe5+ Be7 17. Qxd4 Bxg2 18. Qxd8+ Rxd8 19. Kxg2 O-O 20. Rfe1 Bf6 21. Rab1 Rfe8 22. Kf3 Rxe1 23. Rxe1 Bxb2 24. Re7 Bf6 25. Rxa7 g6 26. Bc4 Rf8 27. a4 Kg7 28. a5 h5 29. a6 Rc8 30. Rxf7+ Kg8 31. Rc7+ Kh8 32. Rxc8+ Kh7 33. Rc6 Kh6 34. Bd3 Kg7 35. Rxf6 Kxf6 36. a7 h4 37. a8=Q g5 38. fxg5+ Kxg5

[Assistant] Qe4


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

[User] 1. e4 d6 2. Nf3 Nd7 3. e5 c6 4. e6 fxe6 5. Bd3 Ngf6 6. g4 Ne5 7. Nxe5 dxe5 8. g5 Nd5 9. Qh5+ Kd7 10. g6 h6 11. Nc3 Nf6 12. Qh4 b5 13. Ne4 b4 14. Nc5+ Kc7 15. Qxb4 a5 16. Qb3 Rb8 17. Qa3 Ra8 18. b4 Kd6 19. bxa5 Kc7 20. a6 Qd6 21. Qa5+ Kb8 22. a7+ Rxa7 23. Qb6+ Ka8 24. Na6 Bxa6 25. Bxa6 Qc7 26. Qxc7 Rxc7 27. Bb2 Ra7 28. Bc4 Nd5 29. Bxe5 Nb6 30. Bd3 Nd5 31. Bd4 e5 32. Bxa7 Kxa7 33. c4 Nb4 34. Be4 e6 35. a3 Na6 36. O-O Bc5 37. Rfb1 Rf8 38. Rf1 Rf4 39. Bd3

[Assistant] Rd4


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

[User] 1. c3 c5 2. d4 cxd4 3. cxd4 a6 4. Nc3 e6 5. e3 Nf6 6. Nf3 d6 7. Bd3 Nbd7 8. O-O b5 9. e4 Bb7 10. e5 Nd5 11. exd6 Bxd6 12. Ne4 Be7 13. Re1 O-O 14. Bg5 Bf6 15. Bxf6 N7xf6 16. Nfg5 h6 17. Nf3 Re8 18. Ne5 Nxe4 19. Bxe4 Rb8 20. Rc1 Nf6 21. Bxb7 Rxb7 22. Qf3 Qd5 23. Qg3 Qxd4 24. Red1 Qxb2 25. Nc6 Nd5 26. Re1 Qxa2 27. Rcd1 Rd7 28. Ne5 Rdd8 29. Qf3 Nf6 30. g4 Rxd1 31. Rxd1 Qb2 32. Nc6 Nd5 33. h4 Qf6 34. Qg3 Nf4 35. Kh2 Nd5 36. Kg1 Rc8 37. Ne5 Nf4 38. Nd7 Ne2+ 39. Kg2 Nxg3 40. Nxf6+ gxf6 41. Kxg3 Kg7 42. Rd7 Rc3+ 43. f3 Ra3 44. Rb7 b4 45. Rxb4 a5 46. Re4 Ra2 47. Rd4 a4 48. Rd7 a3 49. g5 hxg5 50. hxg5 fxg5 51. Ra7 Kg6 52. Kg4 f6 53. Kg3 e5 54. Ra6 Rb2 55. Rxa3 Rb4 56. Re3 Rb5 57. Re2 Rb4 58. Rg2 Rf4 59. Rf2 e4 60. Kg2 exf3+ 61. Kg3 Rg4+ 62. Kxf3 f5 63. Ke3 Rf4 64. Rxf4 gxf4+ 65. Kxf4 Kf6 66. Kf3 Ke5 67. Ke3 f4+ 68. Kf3 Kf5 69. Kf2 Kg5 70. Kf3 Kf5 71. Kf2 Ke4 72. Ke2

[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. b3 c5 2. Bb2 b6 3. e4 Bb7 4. Nc3 e6 5. f3 Nf6 6. Bb5 g6 7. d4 cxd4 8. Qxd4 Bg7 9. Qd6 Qe7 10. O-O-O Qxd6 11. Rxd6 Bc6 12. Nge2 a6 13. Bc4 O-O 14. Rhd1

[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: rn5r/4k3/3R1p2/1p2p1p1/4P1n1/1B1R1NPb/1P2N2P/6K1 w - - 0 26

[Assistant] Re6+


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

[User] 1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Nbd2 c5 5. c3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. dxc5 Bxc5 9. e4 Qc7 10. exd5 exd5 11. Nb3 Bb6 12. Bg5 Ne4 13. Qc1 Bg4 14. Bf4 Qe7 15. Nbd4 Qf6 16. Nxc6 bxc6 17. Ng5 Rfe8 18. Nxe4 dxe4 19. Ba6 h6 20. a4 Rad8 21. a5 Bc5 22. b4 Bd6 23. Bxd6 Rxd6

[Assistant] Qe3


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

[User] 1. d4 b6 2. c4 Bb7 3. Nc3 g6 4. a3 Bg7 5. Nf3 d6 6. e4 Nd7 7. Bd3 e5 8. d5 Nc5 9. Bc2 Ne7 10. b4 Nd7 11. O-O O-O 12. Bg5 f5 13. Qd2 f4 14. Ne1 h6 15. Bxe7 Qxe7 16. f3 g5 17. Nd3 Nf6 18. Kf2 Bc8 19. Ke1 h5 20. Kd1 g4 21. Kc1 a5 22. b5 Bd7 23. a4 Rfc8 24. Kb2 Ne8 25. Rh1 gxf3 26. gxf3 Kh8 27. Rag1 Nf6

[Assistant] Rg5


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

[User] 1. e4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bc5 5. Nge2 Nd4 6. h3 d6 7. O-O Bd7 8. d3 h5 9. Kh2 h4 10. g4 Nxe2 11. Qxe2 Nh7 12. f4 exf4 13. Bxf4 Ng5 14. a3 Ne6 15. Bd2 a6 16. Nd5 c6

[Assistant] Ne3


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

[User] FEN: rnb1k2r/ppp3pp/3p4/4q3/7P/2N2K2/PPP1P1P1/R2Q1BNR b kq - 1 10

[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. g3 e6 2. Bg2 d6 3. Nf3 g6 4. O-O Bg7 5. d4 Ne7 6. c3 O-O 7. e4 c5 8. e5 cxd4 9. exd6 Nf5

[Assistant] Nxd4


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

[User] FEN: 8/R4pBk/p3pPb1/1p6/5K2/P7/1r6/8 w - - 0 55

[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. g3 c5 2. Bg2 Nf6 3. e4 g6 4. e5 Ng8

[Assistant] f4


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

[User] FEN: 6k1/pp5p/3r4/3R4/2PpP3/1K3P2/PP6/8 b - - 1 36

[Assistant] Rxd5


[System] You are a chess 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. e4 d5 3. e5 Bf5 4. Ne2 h5 5. Ng3 Qd7 6. Nxf5 Qxf5 7. Bd3 Qg4 8. Qxg4 hxg4 9. Be3 e6 10. Nd2 Ne7 11. O-O-O Nf5 12. Be2 Nxe3 13. fxe3 g3 14. hxg3 Rg8 15. g4 Be7 16. Nf3 Nd7 17. g5 O-O-O 18. Bd3 a6 19. c3 c5 20. Kd2 Kc7 21. Rh7 Nf8 22. Rh5 Ng6 23. g3 b5 24. Rdh1 Rdf8 25. Rh7 Kc6 26. Ke2 Bd8 27. Bxg6 fxg6 28. R1h4 Be7 29. Rf4 Rf5 30. g4 Rff8 31. Kf2 c4 32. Kg3 Kd7 33. Rh1 b4

[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] FEN: 2r3k1/p4ppp/2Q1bq2/2p1R3/2N5/3p2P1/PP3P1P/n5K1 w - - 1 26

[Assistant] Qxc8+


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

[User] FEN: 1r2r1k1/3b1ppp/p1n5/3pN3/2pPn3/P1B1R1P1/2P2PBP/3R2K1 b - - 6 20

[Assistant] Nxc3


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

[User] 1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. Be2 Bg4 5. O-O Nc6 6. d3 e6 7. Nc3 Qh5 8. h3 O-O-O 9. Bf4 Bd6 10. Bxd6 Rxd6 11. Qc1 Bxh3 12. gxh3 Qxh3 13. Qf4 Nd5 14. Nxd5 Rxd5 15. Qg3 Qh6 16. Kg2 Qf6 17. Rh1 h6 18. Rh4 Ne5 19. Nxe5 Rxe5 20. Rf4 Qe7 21. d4 Rxe2 22. c4 g5 23. Rf3 Rd8 24. Re3 Rxb2 25. d5 Rb4 26. dxe6 fxe6 27. c5 Rf4 28. c6 b6 29. a4 Qd6 30. a5 Qxc6+ 31. Kh2 Rdd4 32. Qg2 Rh4+ 33. Kg1 Rdg4 34. Rg3 Qxg2+ 35. Kxg2 Rxg3+ 36. fxg3 Rd4 37. axb6 axb6 38. Rh1 Rd6 39. Rxh6 Kb7 40. Rh8 b5 41. Rg8 Rb6

[Assistant] Rxg5


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

[User] 1. d4 g6 2. c4 Bg7 3. Nf3 d6 4. g3 Nd7 5. Bg2 e5 6. O-O Ne7 7. Nc3 O-O 8. e4 exd4 9. Nxd4 Nc6 10. Nxc6 bxc6 11. Qc2 Rb8 12. Be3 Ne5 13. b3 c5 14. Rad1 Nc6 15. h3 Nd4 16. Qb1 Re8 17. Rfe1 h5 18. Ne2 Nxe2+ 19. Rxe2 Bd7 20. Qd3 Qc8 21. Kh2 a5 22. Bd2 a4 23. Bc3 axb3 24. Bxg7 Kxg7 25. axb3 Bc6 26. Qc3+ Kg8 27. Re3 Qe6 28. Rde1 Qe5 29. Qd2 h4 30. f4 hxg3+ 31. Rxg3 Qd4 32. Rd3 Qf6 33. e5 dxe5 34. Bxc6 Qxc6 35. fxe5 Qe6 36. Qf4 Red8 37. Rf3 Rd4 38. Qf6 Rbd8 39. Qxe6 fxe6 40. Rf6 Rd3 41. Rxe6 Rxb3 42. Rxg6+ Kf7 43. Rf6+ Ke7 44. Kg2 Rd2+ 45. Rf2 Rxf2+ 46. Kxf2

[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] 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bf4 e6 7. e3 Bd7 8. Be2 a6 9. O-O Be7 10. a3 O-O 11. b4 Rac8

[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: 6k1/3R4/5r2/5p1p/5P2/5PPp/6K1/8 w - - 0 44

[Assistant] Kxh3


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

[User] 1. e4 c5 2. Nc3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. d3 Bg7 6. f4 d6 7. Nf3 f6 8. O-O e5 9. Qe1 Ne7 10. fxe5 fxe5 11. Ng5 Rf8 12. Rxf8+ Kxf8 13. Nxh7+ Kg8 14. Ng5 Nd5 15. exd5 cxd5 16. Nxd5 Bb7 17. c4 Bxd5 18. cxd5 Qf6 19. Ne4 Qf7 20. Nc3 e4 21. dxe4 Bd4+ 22. Be3 Qf6 23. Bxd4 Qxd4+ 24. Qf2 Qxf2+ 25. Kxf2 Rb8 26. b3 c4 27. bxc4 Rb2+

[Assistant] Ne2


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 Bg4 6. Be2 O-O 7. O-O Nbd7 8. h3 Bxf3 9. Bxf3 c5 10. d5 a6 11. Bf4 Ne8 12. Qd2 Nc7 13. a4 Rb8 14. a5 b5 15. cxb5 axb5 16. a6 b4 17. Nd1 Ra8 18. Qd3 Nb6 19. a7 Qc8 20. e5 dxe5 21. Be3 f5 22. Bxc5 e4 23. Qb3 Ncxd5 24. Ne3 Qxc5 25. Be2 Kh8 26. Rfc1 Qd4

[Assistant] Nxd5


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

[User] 1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. Bg5 h6 5. Bh4 Bg7 6. e5 Nfd7 7. f4 O-O 8. Nf3 Kh7 9. Bd3 Nc6 10. O-O Nb4 11. Be2 c5 12. exd6 Bf6 13. dxe7 Bxe7 14. Bxe7 Qxe7 15. a3 cxd4 16. Nxd4 Nc6 17. f5 Qe3+ 18. Kh1 Qxd4 19. Nd5 Qxd1

[Assistant] Raxd1


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

[User] 1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 d6 5. c4 Nc6

[Assistant] Nc3


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

[User] FEN: 8/1rR2n1k/4N1p1/1p3pPp/4p2P/pPq3P1/P1P1Q3/2KR4 b - - 4 43

[Assistant] Rxc7


[System] You are a chess 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. g3 g6 4. Bg2 Bg7 5. Nge2 Nf6 6. O-O Bg4 7. h3 Bxe2 8. Qxe2 O-O 9. d3 Nbd7 10. f4 Qc7 11. Kh2 e5 12. f5 d5 13. g4 d4 14. Nb1 c5 15. g5 Nh5 16. Nd2 b5 17. Bf3 Nf4 18. Qf2 c4 19. a4 cxd3 20. cxd3 Nxd3 21. Qe2 Nxc1 22. Raxc1 Qa5 23. axb5 Rab8 24. Nc4 Qxb5 25. Qg2 gxf5 26. exf5 f6 27. Bd5+ Kh8 28. Bc6 Qb4 29. Bxd7 Qe7 30. Be6 fxg5 31. Qe4 Bf6 32. Nxe5 Rxb2+ 33. Kh1

[Assistant] Qd6


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

[User] FEN: 8/8/5pk1/4pn2/6KP/5P2/8/8 w - - 0 74

[Assistant] h5+


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

[User] FEN: 8/5rk1/pp2Q1pp/2p5/P7/2bPB1qP/2P3P1/5RK1 b - - 10 40

[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. d3 Nf6 2. Nf3 g6 3. Nbd2 Bg7 4. e4 c5 5. h3 Nc6 6. c3 O-O 7. Qc2 d5 8. Be2 e5 9. Nf1 Qc7 10. g4 dxe4 11. dxe4 Be6 12. Ng3 c4 13. g5 Nd7 14. h4 Nc5 15. h5 Rfd8 16. Be3 Nd3+ 17. Kf1 b5 18. h6 Bf8 19. Kg2 Bg4 20. Rh4 Qc8 21. Rxg4 Qxg4 22. Nxe5 Qe6 23. Nxd3 cxd3 24. Bxd3 a6 25. f4 Rd7 26. a4 bxa4 27. Rxa4 a5 28. Bc4 Qg4 29. b4 Rad8 30. Bb5 Rd6 31. Be2 Qc8 32. bxa5 Nd4 33. Bxd4 Rxd4 34. Rxd4 Rxd4 35. a6 Rd7 36. Bg4 Bc5 37. Bxd7 Qxd7 38. Qa2 Ba7 39. f5 gxf5 40. Nxf5 Qe6 41. Qd5 Qxd5 42. exd5 Kf8

[Assistant] Kf3


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

[User] 1. e4 g6 2. d4 Bg7 3. Nc3 Nf6 4. Be3 Nc6 5. f3 e5 6. Nge2 Nxd4 7. Nxd4 exd4 8. Bxd4 O-O 9. Qd2 c6 10. O-O-O d5 11. e5 Nd7 12. f4

[Assistant] c5


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

[User] 1. d4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. Re1 b6 7. c3 Bb7 8. b3 Nbd7 9. Bb2 c5 10. Nbd2 Rc8 11. e4 a6 12. e5 Ne4 13. Rc1 cxd4 14. Nxe4 dxe4 15. Nd2 dxc3 16. Bxc3 Nc5 17. Nxe4 Bxe4 18. Bxe4 Qxd1 19. Rcxd1 Nxe4 20. Rxe4 Rxc3 21. Rd7 Bc5 22. Re2 Rc8 23. Kg2 g5 24. h4

[Assistant] gxh4


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

[User] 1. e4 c5 2. Nc3 Nc6 3. Nf3 g6 4. d4 Bg7 5. Be3 cxd4 6. Nxd4 Nf6 7. Bc4 O-O 8. f3 d6 9. Bb3 Bd7 10. Qd2 Rc8 11. O-O-O Ne5 12. h4 h5 13. g4 hxg4

[Assistant] h5


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

[User] 1. g3 d5 2. Bg2 c6 3. Nf3 Nf6 4. O-O g6 5. d3 Bg7 6. c3 O-O 7. Qc2 Nbd7 8. Nbd2 Nc5 9. Nb3 Nxb3 10. axb3 e5 11. Nxe5 Bf5 12. Nf3 c5 13. Nh4 Be6 14. Bg5 h6 15. Be3 Ng4 16. Bxc5 Re8 17. Nf3 b6 18. Bd4 f6 19. h3 Ne5 20. Nxe5 fxe5 21. Be3 Qd7 22. Qd2 Kh7 23. Kh2 Rad8 24. Ra4 Qb5 25. Rxa7 Qxb3 26. Bxh6 Rd7 27. Rxd7 Bxd7 28. Bxg7 Kxg7 29. Ra1 Re7 30. Qg5 Rf7 31. Qxe5+ Kh7 32. Qe3 Qxb2 33. Ra7 Kg7 34. Bxd5

[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. e4 e6 2. d4 d5 3. e5 c5 4. dxc5 Bxc5 5. Qg4 Ne7 6. b4 h5 7. Qxg7 Bxb4+ 8. c3 Rg8 9. Qh7 Qc7 10. Nf3 Bxc3+ 11. Nxc3 Qxc3+ 12. Kd1 Qxa1 13. Bb5+ Bd7 14. Bd3 Nbc6 15. Re1 Nb4

[Assistant] Re2


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

[User] 1. d4 d5 2. e3 Nf6 3. Nf3 e6 4. Bd3 Be7 5. Nbd2 c6 6. Qe2 O-O 7. c3 b6 8. e4 c5 9. e5 Nfd7 10. h4 cxd4 11. cxd4 f5 12. exf6 Nxf6 13. Ng5 h6

[Assistant] Nxe6


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

[User] 1. e3 d5 2. d4 c5 3. f4 Nc6 4. c3 cxd4 5. exd4 e6 6. Bd3 Nf6 7. Nd2 Bd6 8. Ne2 Qc7 9. O-O O-O 10. Nf3 a6 11. Ne5 b5 12. a3 Rb8 13. Ng3 a5 14. Qe2 b4 15. axb4 axb4 16. Bd2 bxc3 17. bxc3 Ne7 18. Rac1 Ng6 19. h3 Bd7 20. Rc2 Rfc8 21. Rfc1 Qb7 22. Kh2 Bb5 23. Bxb5 Qxb5 24. Qf3 Qb7 25. Kg1 Rc7 26. Be1 Rbc8

[Assistant] Re2


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

[User] FEN: r2br3/p2q2kn/1p6/3pPbp1/3P1B2/3B1Q2/PPR2KP1/7R w - - 2 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] 1. d4 g6 2. Bf4 Bg7 3. e3 d6 4. Nf3 Nd7 5. Be2 e5 6. Bg5 f6 7. Bh4 Ne7 8. dxe5 dxe5 9. Bc4 Nf5 10. Bg3 Nxg3 11. hxg3 c6 12. Qd6 Qe7 13. Qxe7+ Kxe7 14. Nc3 a5 15. a3 b5 16. Ba2 a4 17. O-O-O Nb6 18. Ne4 Be6 19. Bxe6 Kxe6 20. Nc5+ Ke7 21. Nd2 Rad8 22. Nde4 Nd5 23. Nd3 h6 24. g4 f5 25. gxf5 gxf5 26. Ng3 Ke6 27. Nh5 Bf6 28. Nxf6 Kxf6 29. Rh5 e4 30. Nc5 Ne7 31. Nd7+ Ke6 32. Nc5+ Kf6 33. Rxd8 Rxd8 34. Rxh6+ Kg7 35. Ne6+ Kxh6 36. Nxd8 Kg5 37. Ne6+ Kf6 38. Nf4 Ke5 39. Kd2 Nc8 40. f3 Nb6 41. Kc3 exf3 42. gxf3 c5 43. Nd3+ Kd5 44. b3 axb3 45. cxb3 Kc6 46. Ne5+ Kd5 47. Nd3 Kc6 48. Nf4 Kd6 49. Kd3 Ke5 50. Ng6+ Kf6 51. Nf4 Ke5 52. Ne2 Nd5 53. Nc3 Nxc3 54. Kxc3 Kd5 55. a4 b4+ 56. Kd3 Ke5 57. Kc4

[Assistant] Kd6


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. O-O-O Nxd4 10. Bxd4 Be6 11. Kb1 Qc7 12. a3 Rfc8 13. h4 Qa5 14. h5 Rab8 15. h6 Bh8 16. Bxf6 Bxf6 17. Nd5 Qxd2

[Assistant] Nxf6+


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

[User] FEN: 6rk/3PP3/4Q1K1/2p2p2/3b1P1q/7P/P5P1/8 w - - 1 42

[Assistant] Qxg8+


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

[User] FEN: 8/3k4/3r3p/3R2p1/5p2/3K1P1P/6P1/8 w - - 1 53

[Assistant] Ke4


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

[User] 1. e4 e6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Nf3 Bg7 7. c3 c5 8. Bf4 cxd4 9. Nxd4 e5 10. Bb5+ Bd7 11. Nf5 O-O 12. Bxd7 Qxd7 13. Qg4 Qxf5 14. Qxf5 exf4 15. Qxf4 Nc6 16. O-O Ne5 17. Rae1 Rae8 18. Re3 Kh8 19. Rh3 Rg8 20. Qf5 Ng6 21. Re3 Re5 22. Rxe5 fxe5 23. Qxf7 Nf4 24. Qf5 Rf8 25. Qe4 Ne6 26. Qxb7 Ng5 27. Qxa7 e4 28. Qe3 Bh6 29. Kh1 Rg8 30. h3 Rg6 31. h4 Nf7 32. Qxe4

[Assistant] Rg8


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

[User] 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Nc6 6. Be2 Bg4 7. h3 Qh5 8. Rg1 Bxf3 9. Bxf3 Qg6 10. d5 O-O-O 11. c4 e6 12. Nc3 Nb4 13. Kf1 Nd3 14. Be3 Ne5 15. Be2 exd5 16. cxd5 Ne4 17. Qb3 Nxc3 18. bxc3 Bd6 19. c4 Rhe8 20. Rb1 b6 21. g3 h5 22. h4 Ng4 23. Bxg4+ Qxg4 24. Kg2 Qe4+ 25. Kh2 Qxh4+ 26. Kg2 Qe4+ 27. Kh2

[Assistant] h4


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

[User] FEN: 5rk1/5ppp/p1q1p3/3b4/P2Bp1Q1/2P1P3/5PPP/1r3RK1 w - - 0 22

[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] 1. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. O-O g6 5. d4 Bg7 6. c4 O-O 7. cxd5 cxd5 8. Nc3 Nc6 9. e3 Re8 10. Nd2 e5 11. Nb3 e4 12. Ne2 Bg4 13. Bd2 Qd7 14. Qe1 Bf3 15. Nf4 Qg4 16. h3 Qf5 17. Nc5 g5 18. Ne2 Bxg2 19. Kxg2 g4 20. Nf4 gxh3+ 21. Kh2 Ng4+ 22. Kh1 Bh6 23. Qe2 Bxf4 24. exf4 e3 25. Bxe3 Nxd4 26. Qd1 Ne6 27. Qc2 Qxc2 28. Rac1 Qf5 29. Nd3 Nxe3 30. f3 Qe4 31. fxe4 Ng2 32. Rf2 Ne3 33. Ne5 Ng4 34. Nf3 Nxf2+ 35. Kh2 Nxe4 36. Rf1 Nxg3 37. Nh4 Nxf1+ 38. Kxh3 Nd4 39. Nf5 Re3+ 40. Nxe3 Nxe3 41. f5 Nexf5 42. b3 f6 43. Kg4

[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. Nc3 Nf6 2. e4 d5 3. e5 Ne4 4. Nce2 c5 5. d3 Nxf2 6. Kxf2 Nc6 7. Nf3 Bg4 8. Bf4 e6 9. Ng3 Be7 10. h3 g5 11. hxg4 gxf4 12. Nh5 Qc7 13. Qe1 O-O-O 14. Nxf4 Rdg8 15. Kg3 h5 16. Rxh5 Rxh5 17. Nxh5 f6 18. Kh3 fxe5 19. c3 Bd6 20. d4 cxd4 21. cxd4 e4 22. Ne5 Bxe5 23. dxe5 Qxe5 24. b4 Qg5 25. Qg3

[Assistant] Ne5


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

[User] 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 b5 5. a4 c6 6. axb5 cxb5 7. b3 Nc6 8. bxc4 Bf5 9. cxb5 Nb4 10. Na3 Ne4

[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. d4 Nf6 2. Nf3 e6 3. c4 Be7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Bd3 cxd4 9. cxd4 Bb4+ 10. Bd2 Nc6 11. Bxb4 Nxb4 12. Qa4+ Nc6 13. O-O Bd7 14. Qa3 Qe7 15. Qb2 Qb4 16. Qxb4 Nxb4 17. Be2 Bc6 18. d5 exd5 19. exd5 Nxd5 20. Nd4 Nf4 21. Bf3 Bxf3 22. Rfe1+ Be2 23. Nxe2 Ne6 24. Nd4 Ke7 25. Nf5+ Kf6

[Assistant] Nd6


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

[User] 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. a3 Be7 5. d4 d6 6. h3 O-O 7. Be3 exd4 8. Nxd4 Nxd4 9. Qxd4 Nd7 10. Nd5 Re8 11. Nxe7+ Qxe7 12. f3 c6 13. O-O-O d5 14. Bf4 dxe4 15. Bc4 Qf6 16. Qd2 Ne5 17. Bb3 Be6 18. Bg5 Qg6 19. f4 Nc4 20. Bxc4 Bxc4 21. Rhe1 h6 22. Bh4 Bd5 23. g4 f6 24. Bf2 f5 25. Rg1 Qf7 26. Bd4 g6 27. Bc3 Kh7 28. Qd4 Rg8 29. Rg3 Rad8 30. Rdg1 fxg4 31. Rxg4 Be6 32. Qxe4 Bxg4 33. hxg4 Rge8 34. Qa4 a6 35. f5 Rd5 36. Qf4 Re7 37. Rh1 h5 38. gxh5 gxf5 39. h6 Qe6 40. Kb1 Qe4 41. Qg5 Qxh1+ 42. Ka2 Qe4 43. Qf6 Qe6 44. Qh8+ Kg6 45. b3 Rd2 46. Bxd2 Qe4 47. Qg8+ Kh5 48. Kb2 Qe5+ 49. Bc3 f4 50. h7 Qxc3+

[Assistant] Kxc3


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

[User] FEN: 5k2/5pp1/1R5p/1p3N2/r1p1P3/8/1PP2n2/1K6 w - - 2 32

[Assistant] Rb8#


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

[User] 1. e4 c5 2. d4 cxd4 3. Nf3 e6 4. Nxd4 a6 5. Nc3 Nc6 6. Be3 Qc7 7. Qd2 Nf6 8. O-O-O Bb4 9. f3 b5 10. g4 Bb7 11. g5 Nh5 12. a3 Ba5 13. b4 Bb6 14. Ndxb5 axb5 15. Nxb5 Qd8 16. Bxb6 Qxb6 17. Qd6 O-O-O 18. c4 Qe3+ 19. Rd2 Qf4

[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: r3kb1r/1ppnpppp/p4n2/qB1P4/N3P3/5P2/PP1BQP1P/R3K2R b KQkq - 1 12

[Assistant] Qxb5


[System] You are a chess 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. Nf3 c6 7. d4 Nf6 8. Bd3 b5 9. O-O Bg4

[Assistant] h3


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

[User] 1. e4 c5 2. c3 d5 3. exd5 Nf6 4. d4 cxd4 5. Nf3 d3 6. Bxd3 Nxd5 7. O-O Nc6 8. Re1 Bg4 9. Bg5 f6 10. Bh4 e5 11. h3 Bxf3 12. Qxf3 Bc5 13. Nd2 Nf4 14. Qxf4 Qxd3 15. Nb3 Be7 16. Qg4 O-O 17. Rad1 Qg6 18. Qe2 Rad8 19. Bg3 Rxd1 20. Rxd1 Rd8 21. Rxd8+ Bxd8 22. Qc4+ Qf7 23. Qb5 Bb6 24. c4 Bd4 25. Nc5 Bxc5

[Assistant] Qxc5


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

[User] 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. a3 Nh6 6. b4 cxb4 7. axb4 Nf5 8. h4 h6 9. h5 Be7 10. Nf3 a6 11. Bd3 Bg5 12. g4 Bxc1 13. gxf5 exf5 14. Qxc1 Be6 15. Nbd2 Rc8 16. Qd1 Qe7 17. Nb3 Nd8 18. Nc5 b6 19. Nxa6 Rxc3

[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. e4 g6 2. Nf3 Bg7 3. d4 c5 4. d5 d6 5. c4 Bg4 6. Be2 Nd7 7. Nc3 Nh6 8. Qc2 O-O 9. h3 Bxf3 10. Bxf3 Ne5 11. Be2 f5 12. O-O fxe4 13. Nxe4 Nf5 14. Ng5 Nd4

[Assistant] Qd1


[System] You are a chess 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 e6 4. d3 d5 5. O-O Be7 6. Nbd2 O-O 7. Qe1 b6 8. c3 Bb7 9. e4 Nbd7 10. e5 Ne8 11. h4 Nc7 12. Nh2 c5 13. f4 Rc8 14. Ng4 Re8 15. h5 h6 16. f5 exf5 17. Rxf5 Ne6 18. Nf3 Bf8 19. Nh4 f6 20. exf6 Nxf6 21. Nxf6+ gxf6 22. Qf2 Bg7 23. Rf3 d4 24. Rf5 Bxg2 25. Qxg2 dxc3 26. bxc3 Qxd3 27. Rf2 f5 28. Nxf5 Qxc3 29. Rb1 Nd4 30. Nxh6+ Kh8 31. Nf7+ Kg8 32. h6 Ne2+ 33. Rxe2 Rxe2

[Assistant] Qxe2


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

[User] FEN: r1bq1rk1/pp3pp1/2pp3Q/3N4/2BnP3/3P2RP/PPP3P1/R5K1 b - - 0 15

[Assistant] Ne2+


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

[User] 1. Nf3 d5 2. g3 e6 3. Bg2 Nf6 4. d3 Be7 5. O-O O-O 6. Nbd2 Nbd7 7. e4 b6 8. e5 Bb7 9. exf6 Nxf6 10. d4 c5 11. Re1 cxd4 12. Nb3 Bd6

[Assistant] Nbxd4


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

[User] FEN: r1b1k2r/ppp2ppp/2p5/2b1P3/3q1P2/2PP3P/PP2KnP1/RNB1QB1R b kq - 0 11

[Assistant] Qxd3#


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

[User] 1. d4 d6 2. Nf3 g6 3. Bg5 Bg7 4. Bh4 Nd7 5. Bg3 c6 6. e3 Qa5+ 7. Nbd2 Qb6 8. b3 Qc7 9. c4 Bh6 10. c5 Ngf6 11. cxd6 exd6 12. Be2 Bg7 13. Nc4 Bf8

[Assistant] Qc2


[System] You are a chess 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. Nf3 d6 3. d5 Ne5 4. Nxe5 dxe5 5. g3 Nf6 6. Bg2 e6 7. c4 Bb4+ 8. Nc3 O-O 9. O-O Rb8 10. e4 Bd6 11. Be3 b6 12. Rc1 Bd7

[Assistant] a3


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

[User] 1. e4 d6 2. Nf3 g6 3. Nc3 Bg7 4. d4 a6 5. Bc4 e6 6. Qe2 b5 7. Bb3 Bb7 8. Bg5 Ne7 9. O-O-O h6 10. Bf4 O-O 11. h4 Nd7 12. g4 d5 13. exd5 Nxd5 14. Bxd5 Bxd5 15. Nxd5 exd5 16. Qd2 Kh7 17. g5 h5 18. Ne5 Nxe5 19. Bxe5 Bxe5 20. dxe5 c6 21. f4 Qd7 22. Qd3 Qf5 23. Qxf5 gxf5 24. Rhe1 Rfe8 25. a3 Re6 26. Rd3

[Assistant] Rc8


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

[User] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 Nf6 5. e5 Nd5 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 Qc7 9. Qd2 Nc6 10. exd6 Bxd6 11. Bb5 Bd7 12. O-O O-O 13. Bb2 a6 14. Bd3 b5 15. Ng5 h6 16. Ne4 Be7 17. Rac1 Na5 18. c4 Nxc4 19. Qe2 Qf4 20. Bxc4 bxc4 21. g3

[Assistant] Qf5


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

[User] 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nf6 5. Bg2 d5 6. O-O d4 7. Na4 d3 8. Nxc5 dxe2 9. Qxe2 O-O 10. d4 Nc6 11. Rd1 Bg4 12. d5 Bxf3

[Assistant] Bxf3


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

[User] 1. d4 d5 2. c4 dxc4 3. Nc3 c5 4. d5 e6 5. e4 exd5 6. Qxd5 Nf6 7. Qxd8+ Kxd8 8. Bxc4 a6 9. Bxf7 Nc6

[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 g6 2. d3 Bg7 3. Nc3 d6 4. Nge2 c6

[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] 1. Nf3 c5 2. d4 cxd4 3. c3 Nc6 4. cxd4 g6 5. Nc3 d5 6. Bf4 Bg7 7. e3 Nf6 8. Bd3 O-O 9. O-O Bg4 10. h3 Bxf3 11. Qxf3 Re8 12. Nb5 e5 13. dxe5 Nxe5 14. Qe2 a6 15. Nc3 b5 16. Rfd1 Nc6 17. a3 Nd4 18. Qd2 Nb3 19. Qc2 Nxa1 20. Rxa1 Rc8 21. Qd1 Qd7 22. Rc1 Red8 23. Ne2 Rxc1 24. Nxc1 Ne4 25. Ne2 Bxb2 26. Qb3 Bg7 27. Nd4 Nc5 28. Qb1 Nxd3 29. Qxd3 Rc8 30. h4 h6 31. g3 Qg4 32. Ne2 Qh3 33. Bd6 Bf6 34. Bb4 Kg7 35. Be1 g5 36. hxg5 hxg5 37. Qxd5 Rh8 38. Qg2

[Assistant] Qxg2+


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

[User] 1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 4. Nc3 Nc6 5. O-O e5 6. d3 Be7 7. h3 O-O 8. Be3 Be6 9. Bb3 Bxb3 10. axb3 a6 11. Qd2 Nd4 12. Ne1 b5 13. Ne2 Nxe2+ 14. Qxe2 a5 15. c3 a4 16. bxa4 bxa4 17. Nc2 Qb6 18. Na3 Rfb8 19. Nc4 Qd8 20. f3 Nd7 21. Rfd1 Nb6 22. Qf2 Nxc4 23. dxc4 Qb6 24. Rd2 Qb3 25. Qe2 a3 26. bxa3 Qxc3 27. Rda2 Rb3 28. Bc1 Qd4+ 29. Kh2 Bh4 30. a4 Rd3 31. g3 Be7 32. Ra3 Rd1 33. Be3 Qxa1 34. Rxa1 Rxa1 35. g4 R1xa4 36. Kg3 Ra2 37. Qd1 Ra1 38. Qd5 Bf8 39. g5 R8a3 40. Qd2 R1a2 41. Qc1 Rb3 42. Bd2 Raa3 43. Be1 Rxf3+ 44. Kg2 Rxh3 45. Qd1 Rhd3 46. Qg4 Ra2+ 47. Kf1 Rb3 48. Qh4 Rb1 49. Qg3 Raa1 50. Qh4 Rxe1+ 51. Qxe1 Rxe1+ 52. Kxe1 f6 53. g6 hxg6 54. Kf2 Kf7 55. Kf3 Ke6 56. Kg4 g5 57. Kf3 g6 58. Kg4 f5+ 59. Kf3 g4+ 60. Kg3 f4+ 61. Kxg4 Be7 62. Kf3 g5

[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] FEN: 8/pp2R1p1/8/8/4k1np/4b1B1/Pr5P/3R1K2 b - - 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] 1. d4 e5 2. c3 e4 3. Bf4 d5 4. e3 Nf6 5. c4 Bd6 6. Ne2 c6 7. Nbc3 Bg4 8. Qb3 Bxe2 9. Nxe2 Bxf4 10. Nxf4 Nbd7 11. cxd5 O-O 12. dxc6 bxc6 13. Rc1 Rb8 14. Qc3 c5 15. dxc5 Qc7 16. b4 Ne5 17. a3 Rfd8 18. Be2 Nd3+ 19. Nxd3 exd3 20. Bxd3 Nd5 21. Qc4 Qe5 22. O-O Nxe3 23. fxe3 Qxe3+ 24. Kh1 Qxd3 25. Qxd3

[Assistant] Rxd3


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

[User] 1. e4 d5 2. exd5 Qxd5 3. d4 Nc6 4. Nf3 Bg4 5. Be2 O-O-O 6. Be3 e5 7. dxe5 Qxd1+ 8. Bxd1 Nxe5 9. Nbd2 Nxf3+ 10. Nxf3 Bxf3 11. Bxf3 Nf6 12. O-O Nd5 13. Bxa7 b6 14. a4 Nb4 15. a5 bxa5 16. Rxa5 Rd2 17. c3 Nc2 18. Rd5 Rxd5 19. Bxd5 f5 20. Rd1 Bd6 21. Be6+ Kb7 22. Bxf5 Kxa7 23. Bxc2 Re8 24. Bd3 Kb6 25. g3 c5 26. Kg2 Kc7 27. Rd2 Rb8 28. Bxh7 Be5 29. Be4 Bf6 30. Bf3 Rb6 31. h4 Re6 32. Rd5

[Assistant] Kb6


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

[User] 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. Nf3 d6 6. Be2 Nc6 7. d5 Ne5 8. O-O Nxf3+ 9. Bxf3 e5 10. Bg5 h6 11. Be3 Nh7

[Assistant] c5


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

[User] 1. d3 e6 2. Nc3 d5 3. e4 f5 4. Nf3 Nf6 5. e5 Nfd7 6. d4 Be7 7. g4 O-O 8. gxf5 Rxf5 9. Bd3 Rf7 10. h4 Qf8 11. Bxh7+ Kxh7 12. Ng5+ Kg8 13. Qh5

[Assistant] Bxg5


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

[User] FEN: 2r5/8/8/3P1k1P/1p2Rp1K/1P2pP2/8/8 b - - 0 62

[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] FEN: 8/5pk1/R7/5KP1/4N3/3r2p1/8/8 b - - 0 52

[Assistant] g2


[System] You are a chess 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 e5 2. e4 exf4 3. Nc3 g5

[Assistant] d4


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

[User] 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. e4 d6 7. Bd3 c5 8. d5 Ng4 9. h3 Ne5 10. Nxe5 dxe5 11. O-O

[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: 3r4/1b2q1k1/p1p1p1B1/3p2PQ/7K/2P4P/PP6/8 w - - 1 34

[Assistant] Qh7+


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

[User] FEN: 1r3rk1/QR4pp/3bpp2/3p4/p1nP4/P3PN1P/2q2PP1/5RK1 w - - 0 27

[Assistant] Rxg7+


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

[User] 1. d4 c6 2. Nf3 d5 3. e3 Nf6 4. c4 Bg4 5. cxd5 cxd5 6. Be2 Bxf3 7. Bxf3 e6 8. Be2 Nbd7 9. O-O Bd6 10. Nd2 O-O 11. Nb3 Rc8 12. g3 Bb8 13. Bd2 Ne4 14. Bb4 Bd6 15. Rc1 Bxb4 16. Rxc8 Qxc8 17. f3 Nef6 18. a3 Bd6 19. Nd2 Qb8 20. e4 dxe4 21. fxe4 Bxg3 22. hxg3 Qxg3+ 23. Kh1 Qh4+ 24. Kg1 Nxe4 25. Nxe4 Qxe4 26. Bf3 Qg6+ 27. Kf2 b6 28. Rg1 Qf6 29. Qd2 Rd8 30. Qg5 Qxg5 31. Rxg5 Nf6 32. Ke3 g6 33. Rb5 Kg7 34. Rb3 h5

[Assistant] Rc3


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

[User] FEN: 5rk1/p5pp/1p6/2r1pp2/2q5/3N2P1/PPPnQ1BP/K1R1R3 b - - 11 29

[Assistant] Qxa2+


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

[User] FEN: 6k1/pp3pp1/4q2p/5Q2/4rb2/2P1pR2/PP4P1/R6K w - - 2 29

[Assistant] Rxf4


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

[User] FEN: 8/6K1/8/3p4/1p1k4/2P5/2PN4/8 b - - 0 41

[Assistant] Kxc3


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

[User] FEN: 6r1/8/8/8/PpP1pk2/1P1nR3/4K3/7R b - - 3 53

[Assistant] Rg2+


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

[User] FEN: 7Q/2r1k3/4n3/3pP3/3P4/2b2KP1/8/8 w - - 0 48

[Assistant] Qf6+


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

[User] 1. g3 c6 2. Bg2 d5 3. d3 Nf6 4. Nf3 Bf5 5. O-O e6 6. Nbd2 Be7 7. Re1 h6 8. a3 Bh7 9. e4 O-O 10. e5 Nfd7 11. c4 c5 12. cxd5 exd5 13. e6 fxe6 14. Rxe6 Nc6 15. Re1 Nb6 16. b3

[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 e6 2. Nf3 d5 3. g3 c6 4. Bg2 Nf6 5. O-O Be7 6. c4 O-O 7. Nc3 b6 8. Ne5 Bb7 9. f4 Nbd7 10. e4 Rc8 11. Be3 dxc4 12. Nxc4 c5 13. d5 exd5 14. exd5 Nb8 15. d6 Bxg2 16. dxe7 Qxd1 17. exf8=Q+ Rxf8 18. Rfxd1 Bc6 19. Ne5 Bb7

[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 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. Nf3 g6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2 Qb6 12. a4 Nbd7 13. Qe2 Rfb8 14. Nb5 Ng4 15. h3 Nge5 16. Nxe5 Nxe5 17. Be3 Qa5 18. b3 Qb4 19. Bf4 Qxb3 20. Rhb1 Qc4 21. Qxc4 Nxc4 22. Ra2 h6 23. Kf1 g5 24. Bc1 Be5 25. Ke2 Kg7 26. Kd3 Na5 27. Bd2 c4+ 28. Kc2 Nb3 29. Rxb3 cxb3+ 30. Kxb3 Kg6 31. f4 Bf6

[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 d5 2. Nf3 Nf6 3. c4 c6 4. e3 g6 5. Nc3 Bg7 6. h3 O-O 7. cxd5 Nxd5 8. Qb3 Nb6 9. a4 Be6 10. Qc2 c5 11. a5 Nd5 12. Nxd5 Qxd5 13. e4 Qd6 14. dxc5 Qc7 15. Be3 Nd7 16. Be2 Rfc8 17. O-O Nxc5 18. Rfc1 Na6 19. Qd1 Qd8 20. Qf1 Nb4 21. Rd1 Qe8 22. Nd4 Bd7 23. a6 bxa6 24. f4 Bxd4 25. Bxd4 Nc2 26. Rxa6 Nxd4 27. Rxd4 Bc6 28. Ra1 e5 29. fxe5 Qxe5 30. Rad1 a5 31. Bc4 Rc7 32. Qd3 Kg7 33. Qc3 a4 34. Qf3 Re7 35. R1d3 Bxe4 36. Rxe4 Qxe4 37. Qxe4 Rxe4 38. Bd5 Re1+ 39. Kf2 Rae8 40. Rd2 R1e5 41. Bf3 f5 42. Rd6 R8e7 43. Ra6 Rb5 44. Rxa4 Rxb2+ 45. Kg3 Rb6 46. h4 Kf6 47. Ra8 Rd6 48. Ra4 Kg7 49. Rb4 h6 50. Rc4 Rde6 51. Rc5 Kf6 52. Rb5 g5 53. hxg5+ hxg5 54. Kf2 Rd6 55. Be2 Re5 56. Rb8 g4 57. Rf8+ Kg5 58. Ra8 Kf4 59. Ra4+ Re4 60. Ra3 g3+ 61. Ke1 Rde6 62. Rf3+ Ke5 63. Kf1

[Assistant] Kf6


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

[User] FEN: 7r/8/8/4R1pr/P3R3/3k2P1/7P/7K b - - 0 44

[Assistant] Rxh2+


[System] You are a chess 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 c5 2. e3 Nf6 3. Ne2 g6 4. g3 Bg7 5. Bg2 d5 6. cxd5 Nxd5

[Assistant] d4


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

[User] 1. d4 Nf6 2. Nf3 c5 3. c4 cxd4 4. Nxd4 b6 5. Nc3 Bb7 6. f3 e6 7. e4 d6 8. Bd3 Be7 9. Be3 a6 10. O-O Qc7 11. b3 Nbd7 12. Rc1 Rc8 13. Be2 O-O 14. Kh1 Kh8 15. Qd2 Rg8 16. Bd3 Qb8 17. f4 Nc5 18. e5 dxe5 19. fxe5 Qxe5 20. Nf3 Qh5 21. Bb1 Rcd8 22. Qc2 Nd3 23. Rcd1 Ne5 24. Ng5 Neg4 25. Bg1 Qxg5 26. Rxd8

[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: 5rk1/p1p5/1p2p1p1/n3Bq2/2PP4/2PQPP2/P3K3/R6R b - - 0 22

[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. c4 d5 2. e3 d4 3. Qc2 dxe3 4. Bd3 Nf6 5. dxe3 e5 6. a3 e4 7. Bxe4 c5 8. Nc3 Nc6 9. Nf3 Be6 10. Bd5 Bxd5 11. cxd5 Nxd5 12. Nxd5 Qxd5 13. Bd2 Qd7 14. Bc3 Bd6

[Assistant] Rd1


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

[User] FEN: 2r2rk1/ppq2pp1/4p2p/3p3n/3n3N/P1PB3P/1PQ2PP1/R3R1K1 w - - 0 17

[Assistant] Qd1


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

[User] FEN: 8/5bp1/5k1p/5P2/6PK/4B3/8/8 w - - 1 41

[Assistant] Bd4+


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

[User] FEN: r4rk1/n4ppp/p1p5/1p6/4P3/2P2Q2/PPB2qPP/RN2N2K b - - 4 21

[Assistant] Qxe1+


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

[User] FEN: r3r1k1/pp3p1p/1q4pB/5b2/4N3/5P1P/PbP1Q1P1/4RR1K w - - 0 23

[Assistant] Nf6+


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

[User] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Qe2 Bc5 5. c3 O-O 6. d3 d6 7. Bg5 h6 8. Bh4 Qe7 9. Nbd2 a6 10. Ba4 b5 11. Bb3 Be6 12. Bd5 Bxd5 13. exd5 Nb8 14. Ne4 Nbd7 15. d4 Bb6 16. dxe5 dxe5 17. O-O-O b4 18. c4 Bc5 19. Kb1 Rfe8 20. g4 Qd8 21. g5 Nxe4 22. Qxe4

[Assistant] hxg5


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

[User] 1. e4 c5 2. Nc3 e6 3. f4 d6 4. Nf3 g6 5. Bc4 Nc6 6. f5 exf5 7. d3

[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 c5 2. d4 cxd4 3. c3 g6 4. Nf3 Bg7 5. Bc4 e6 6. Nxd4 Ne7 7. O-O O-O 8. Be3 a6 9. Nd2 b5 10. Be2 Bb7 11. Bf3 d6 12. a4 bxa4 13. Qxa4 Nd7 14. Qb4 Qc7 15. Nc4 Nc5 16. Nb3 Nd3 17. Qxd6 Qxc4 18. Na5 Qb5 19. Qxe7 Rab8 20. Nxb7 Rxb7 21. Qa3 Qxb2 22. Qxb2 Rxb2 23. Rxa6 Bxc3 24. Ra3 Rc8 25. Bd1 Rb1 26. Bc2 Rxf1+ 27. Kxf1 Nb4 28. Bb1 Bg7 29. Rb3 Nc6

[Assistant] Bd3


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

[User] 1. Nf3 h5 2. h4 a6 3. a4 b5 4. axb5 Bb7 5. e3 Nf6 6. bxa6 e6 7. a7 Nc6 8. d4 Nxa7 9. c4 c5 10. Nc3 cxd4 11. exd4 Nc6 12. Rxa8 Qxa8 13. d5 Nb4 14. Bg5 exd5 15. Bxf6 gxf6 16. Be2 dxc4 17. O-O d5 18. Re1 Be7 19. Nd4 Kf8 20. Nf5 Bc5 21. Bf3

[Assistant] Qa7


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

[User] 1. d4 e6 2. e4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 c4 7. Nbd2 Bd7 8. g3 O-O-O

[Assistant] Ng5


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

[User] 1. c4 e6 2. Nf3 Ne7 3. e3 d5 4. Be2 g6 5. O-O Bg7 6. d4 O-O 7. Nbd2 b6 8. b3 Bb7 9. Bb2 Nd7 10. Rc1 c5 11. Qc2 Rc8 12. Qb1 cxd4 13. Bxd4 dxc4 14. Bxg7 Kxg7 15. Nxc4 Nc5 16. Rfd1 Qc7 17. Nd6 Bd5 18. Qb2+ Kg8 19. Nxc8 Nxc8 20. Ne5 Qb7 21. Ng4 f6 22. Nxf6+ Kh8 23. Nxd5+ Qg7 24. Qxg7+ Kxg7 25. Nf4 Kf6 26. b4 Na6 27. Rd7 Nxb4 28. Rcc7 a5 29. a3 Nd5 30. Nxd5+ exd5 31. Rxd5 Ke6 32. Rb5 Kd6 33. Rxh7 Rd8 34. g4 Kc6 35. Rh6 Nd6 36. Rxg6 Re8 37. Rb2 b5 38. Rd2 Rd8 39. g5

[Assistant] Kb6


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

[User] 1. Nf3 c5 2. b3 d5 3. Bb2 Nc6 4. d4 cxd4 5. Nxd4 Nxd4 6. Bxd4 Qc7 7. g3 e5 8. Bb2 Be6 9. Bg2 e4 10. O-O Nf6 11. e3 Bd6 12. Nd2 Rc8 13. Rc1 h5 14. h4 Bg4 15. Qe1 Bb4 16. c3 Bd6 17. c4 O-O 18. Bxf6 gxf6 19. cxd5

[Assistant] Qxc1


[System] You are a chess 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 c5 2. g3 Nc6 3. Bg2 Nf6 4. Nc3 d6 5. Nf3 g6 6. d4 cxd4 7. Nxd4 Bd7 8. O-O Bg7 9. b3 O-O 10. Bb2 Rc8 11. Nc2 a6 12. a4 h6 13. Ne3 Nb4 14. Qd2 Bc6 15. Ned5 Nbxd5 16. cxd5 Bd7 17. Rad1 Qa5 18. e4 Kh7 19. Rfe1 Qb4 20. e5 dxe5 21. d6 exd6 22. Qxd6 Qxd6 23. Rxd6 Be6 24. Rb6

[Assistant] Rfd8


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nxc6 bxc6 7. O-O a5 8. c4 Ba6 9. Nc3 g6 10. Qa4 Bg7 11. Qxc6+ Kf8 12. e5 dxe5 13. Re1

[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 d5 2. Nc3 dxe4 3. Nxe4 Nf6 4. Nxf6+ exf6 5. d4 Bd6 6. c3 O-O 7. Bd3 Re8+ 8. Ne2 Bg4 9. Qc2 Qe7 10. Bxh7+ Kh8 11. Bd3 Bxe2 12. Bxe2 c5 13. Be3 cxd4 14. Bxd4 Nc6 15. Be3 Rac8 16. O-O-O Nb4 17. Qb3 a5 18. a3 a4 19. Qxa4 Qe4 20. axb4 Ra8 21. Qc2 Qe6 22. Kd2 f5 23. Bf3 f4 24. Bd4 Qc4 25. Rhe1 Red8 26. Qd3 Qb3 27. Qc2 Qc4 28. Re4 Bxb4 29. Rde1 Rxd4+ 30. Rxd4 Qxd4+ 31. Ke2 Qc4+

[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] FEN: 8/2p5/1bPp1R1p/3B2pk/6p1/4q3/1B4KP/8 w - - 2 36

[Assistant] Bf7+


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

[User] 1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. Bg5 cxd4 10. Nxd4 h6 11. Bxf6 Bxf6 12. Nb3 Be6 13. Qd2

[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: r4rk1/3bq1pp/p3pn2/3p4/1p1R1P1Q/2N3PB/PPP4P/2K1R3 w - - 0 18

[Assistant] Nxd5


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

[User] 1. c4 g6 2. g3 Bg7 3. Bg2 Nf6 4. Nf3 O-O 5. O-O c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Qa5 9. Nb3 Qh5 10. e4 Qxd1 11. Rxd1 d6 12. c5 dxc5 13. Nxc5 Bg4 14. f3 Bc8 15. Be3 b6 16. Nd3 Rd8 17. Kf2 Ba6 18. Bf1 Rd7 19. Nf4 Bxf1 20. Kxf1 Rad8 21. Rxd7 Rxd7 22. Ke2 e6 23. Rc1 Ne5 24. b3 Rc7 25. Bd2 Nfd7 26. Nb5 Rxc1 27. Bxc1 Nc6 28. Nd3 Bf8 29. Be3 Be7 30. Nd4 Nxd4+ 31. Bxd4 Kf8 32. Kd2 Ke8 33. Kc3 Kd8 34. Kc4 Kc7 35. Kb5 Kb7 36. Nb4 Nb8 37. a4 a6+ 38. Kc4 Bxb4 39. Kxb4 Nc6+ 40. Kc3 Nxd4 41. Kxd4 f6 42. g4 Kc6 43. g5 fxg5 44. Ke5 Kc5 45. Kxe6 Kd4 46. Kf6 g4 47. fxg4 Kxe4 48. Kg7 Kf4 49. Kxh7 Kg5 50. Kg7 b5 51. axb5 axb5 52. b4

[Assistant] Kxg4


[System] You are a chess 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. Qb3 Nc6 5. Nf3 a5 6. Bg5 a4 7. Qc2 h6 8. Bh4 d5 9. e3 g5 10. Bg3 Ne4 11. a3 Bxc3+ 12. bxc3 Na5 13. Qxa4+ Bd7 14. Qc2 Nxg3 15. hxg3 Nxc4 16. Bxc4 dxc4 17. Ne5 Ba4 18. Qe4 Qd5 19. Qf3

[Assistant] Qxf3


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

[User] FEN: 1k2r1r1/pppqbp2/3p4/1N6/2P2B2/1P6/P1P2QP1/4R1K1 w - - 3 29

[Assistant] Qxa7+


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

[User] 1. d4 b6 2. c4 Bb7 3. Nc3 e6 4. f3 Bb4 5. e4 Bxc3+ 6. bxc3 Ne7 7. Bd3 O-O 8. Bg5 d6 9. Ne2 Nd7 10. O-O h6 11. Be3 e5 12. Qd2 Ng6 13. Bxh6 gxh6 14. Qxh6 Qf6 15. Ng3 Nf4 16. Nf5 Qxh6 17. Nxh6+ Kh7 18. Nf5 Nxd3 19. g3 Nb2 20. a4 Nxc4 21. d5 a5 22. g4 Nc5 23. Rf2 Bc8 24. Ne7 Bd7 25. Rg2 Rae8

[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: 8/R1R3pk/1p2p1rp/3b4/3Q2P1/P3P2q/1P2K3/8 b - - 1 34

[Assistant] Qg2+


[System] You are a chess 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 dxc4 5. a4 Bg4

[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 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 dxc4 5. a4 Bf5 6. e3 Ne4 7. Nxe4 Bxe4 8. Qd2 Bd5 9. f3 g6 10. e4 Be6 11. Rd1 Bg7 12. d5 cxd5 13. exd5 Bf5 14. Bxc4 O-O 15. Ne2 Nd7 16. d6 Ne5 17. dxe7 Qxd2+ 18. Rxd2 Rfc8 19. Rd8+ Rxd8 20. exd8=Q+ Rxd8 21. Bxd8 Nxc4 22. b3 Ne5 23. Bc7 Nd3+ 24. Kd2 Nc5 25. Nc1 Be6 26. Kc2 Bf5+ 27. Kd2 Be6 28. Bb8 a6 29. Re1 Bf6 30. Be5 Be7 31. Kc3 Kf8 32. a5 Ke8 33. Bd4 Nd7 34. Nd3 h5 35. Ne5 Nxe5 36. Bxe5 Kd7 37. Rd1+ Kc6 38. Bd4 Bd6 39. Bb6 Bxh2 40. b4 Be5+ 41. Bd4 Bd6 42. Re1 h4 43. Be5 Be7 44. Bd4 g5 45. Be5 Kb5 46. Rb1 f6 47. Bd4 Bd6 48. Bc5 Be5+ 49. Bd4 Bf4 50. Bxf6 Bd5 51. Bd4 h3 52. gxh3 Bxf3 53. Rg1 Kc6 54. Bf6 Kd5 55. Bxg5 Be5+ 56. Kb3 Be2 57. Re1 Bc4+ 58. Ka3 Bd6 59. Rd1+

[Assistant] Ke6


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

[User] 1. e4 d6 2. Nf3 Nf6 3. Nc3 e5 4. Bc4 Be7 5. O-O O-O 6. h3 c6 7. d3 b5 8. Bb3 a5 9. a3 Nbd7 10. Ne2 Rb8 11. Ng3 Nc5 12. Ba2 b4 13. axb4 axb4 14. Bb1 g6 15. Be3 Qc7 16. Bxc5 dxc5 17. Ba2 h5 18. Bc4 Kg7 19. Nd2

[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 d6 2. c4 e5 3. d5 f5 4. Nc3 Nf6 5. e4 Be7 6. f3 O-O 7. Nh3 c5 8. Nf2 a5 9. a4 Na6 10. Be2 Nb4 11. b3 b6 12. Ba3 f4 13. Bxb4 axb4 14. Nb5 Bd7 15. Qc2 Qe8 16. Nd1 Qg6 17. O-O Bxb5 18. cxb5 Kh8 19. Nf2 Nxd5

[Assistant] Bc4


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

[User] 1. d4 c5 2. Nf3 cxd4 3. e3 d6 4. exd4 Nc6 5. c3 Nf6 6. Be2 g6 7. O-O Bg7 8. d5 Ne5 9. Nxe5 dxe5 10. c4 Bf5 11. Nc3 e4 12. h3 O-O 13. Be3 e6 14. Bd4 exd5 15. Bxf6 Bxf6 16. Nxd5 Bg7 17. Rb1 Be6 18. b3 Rc8 19. Rc1 Bxd5 20. cxd5 Rxc1 21. Qxc1 Qxd5 22. Qe3 Qe6 23. Bc4 Qe7 24. Re1 Re8 25. g3 Kh8 26. Kg2 f5 27. h4 h5 28. Qg5

[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. d4 c6 2. Nf3 d6 3. Bg5 g6 4. Bh4 Bg7 5. c3 Nf6 6. Nbd2 O-O 7. Bg3 Nbd7

[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: r1bqr1k1/5p1p/1p1pp1pB/p1pPn1N1/P1P1P3/1P4Q1/4B1PP/5RK1 w - - 0 21

[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. h4 c6 2. a3 d5 3. h5 Nf6 4. b4 h6 5. Bb2

[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] FEN: r1b4k/pp3pp1/5b2/5B1N/1R2Q3/2P1q3/PP1r2PP/1K5R b - - 8 21

[Assistant] Bxf5


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

[User] 1. d4 Nf6 2. Nc3 e6 3. e4 d5 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 Be7 8. Bd3 b6 9. Qe2 Bb7 10. O-O-O Nd7 11. Ne5 Nf6 12. f4 Qd5 13. c4 Qa5 14. Kb1 O-O 15. g4 Rad8 16. g5 Nxe4 17. Bxe4 Bxe4+ 18. Qxe4 c5 19. Nc6

[Assistant] Qa4


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

[User] 1. d4 e6 2. c4 Nf6 3. Nc3 c5 4. d5 exd5 5. cxd5 d6 6. Nf3 g6 7. Bg5 Bg7 8. e4 a6 9. a4 Bg4 10. Qb3 Bxf3 11. gxf3 Nbd7

[Assistant] Be2


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

[User] FEN: 7k/p5bp/1p1p2p1/8/1P1NP3/6qb/P1QR2B1/2B3K1 b - - 2 27

[Assistant] Qe1+


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

[User] 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nbd2 c5 7. e4 cxd4 8. Nxd4 Qc7 9. Re1 Nc6 10. c3 a6 11. N2b3 Bd7 12. Bg5 Rac8 13. Qd2 Rfe8 14. Bh6

[Assistant] Bh8


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

[User] 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O e6 6. d4 cxd4 7. Qxd4 Nf6 8. Bg5 Nc6 9. Qe3 Be7 10. Rd1 Qc7 11. Nc3 a6 12. Rd2 h6 13. Bh4 Ng4 14. Qf4 Nge5 15. Bxe7 Qxe7 16. Nxe5 dxe5

[Assistant] Qg3


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

[User] FEN: r3k1nr/2p2ppp/3Pb3/pp6/PbP1q3/1K6/1P2Q1PP/RNB2BNR b kq - 1 12

[Assistant] Bxc4+


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

[User] 1. Nf3 c6 2. d4 d5 3. c4 g6 4. cxd5 Bg7 5. Nc3 cxd5 6. e4 Nf6 7. e5 Ne4 8. Bb5+ Bd7 9. Bd3 Bc6 10. O-O O-O 11. Ng5 Nxc3 12. bxc3 Na6 13. f4 Nc7 14. f5 f6

[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 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 O-O 5. h3 d6 6. Be2 Nfd7 7. O-O e5 8. Bh2 Nc6 9. c4

[Assistant] f5


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

[User] 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. h3 O-O 6. Bd3 c5 7. O-O cxd4 8. Nxd4 Nc6 9. Nf3 e5 10. Re1 Be6 11. Bg5 h6 12. Bh4 g5 13. Bg3 Nh5 14. Nd5 Bxd5 15. exd5 Nxg3 16. dxc6 e4 17. Bxe4 Nxe4 18. cxb7 Rb8 19. Rxe4 Rxb7 20. Rb1 Rxb2

[Assistant] Rxb2


[System] You are a chess 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 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Qd3 d6 8. Bd2 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] FEN: 2kr4/2p1qp2/2Qp3b/NP2p2p/4P1rp/2PP4/P4PP1/R4RK1 b - - 0 24

[Assistant] Rxg2+


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

[User] 1. e4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bc5 5. Bg2 d6

[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: r4rk1/pp1q1ppp/8/3pN3/Nn1Pn1b1/1P1QP1P1/5PBP/R4RK1 b - - 4 16

[Assistant] Nxd3


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. e5 Qa5+ 6. Bd2 dxe5 7. Nxe5 Qb6 8. Qxb6 axb6 9. Bc4 e6 10. Nc3 Bd6 11. Nd3 Nc6 12. Nb5 Bb8 13. Bc3 O-O 14. O-O Nd5 15. Bxd5 exd5 16. Nd4 Be6 17. Rfe1 Nxd4 18. Bxd4 Bc7 19. c3 Rfe8 20. a3 h6 21. Be5 Bxe5 22. Nxe5 Bf5 23. Nf3 Be4 24. Nd4 Rac8 25. f3 Bg6 26. Kf2 Bd3 27. Re3 Rxe3 28. Kxe3 Bc4 29. Re1 Re8+ 30. Kd2 Ra8 31. Re7 Rb8 32. Nf5 Kf8 33. Rc7

[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: 1r3rk1/1R3ppp/p1p5/3nP3/8/P4Q1B/2q2PPP/5RK1 w - - 1 21

[Assistant] Qxf7+


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

[User] 1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 Nf6 5. Nf3 Be7 6. h3 O-O 7. Bd3 Be6 8. O-O Nbd7 9. Ne2 Re8 10. c3 Nf8 11. Nf4 c6 12. Re1 Qc8 13. Nxe6 fxe6 14. Ng5 Bd6 15. Qf3 e5 16. dxe5 Rxe5 17. Bf4 Rxe1+ 18. Rxe1 Qc7 19. Bxd6 Qxd6 20. Qg3 Qxg3 21. fxg3 h6 22. Nf3 N8d7 23. Kf2 Kf7 24. g4 Re8 25. Rxe8 Kxe8 26. Bf5 Nc5 27. Ke3 Ke7 28. Kd4 Kd6 29. b3 b6 30. c4 dxc4 31. Kxc4 Ne6 32. Nd4 Nxd4 33. Kxd4 Ne8 34. b4 Nc7 35. a4 Nd5 36. Be4 Nxb4 37. Bf3 Nd5 38. Kc4 Ne3+ 39. Kd4 Nd5 40. Kc4 a6 41. Kd4 b5 42. axb5 axb5 43. Kd3 c5 44. Ke4 Nc3+ 45. Kf5 b4 46. Bb7 b3 47. Ba6 Kd5 48. Bd3 Kd4 49. Kg6 Kxd3

[Assistant] Kxg7


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

[User] 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Nb6

[Assistant] Nc3


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

[User] 1. Nf3 g6 2. g3 Bg7 3. Bg2 Nf6 4. O-O O-O 5. d4 c6 6. Nc3 d5 7. Bg5 b5 8. Qd2 b4 9. Nd1 Ne4 10. Qxb4 Nxg5 11. Nxg5 a5 12. Qd2 Ba6 13. Nf3 Nd7 14. Re1 Nb6 15. b3 e6 16. c3 a4 17. Nb2 axb3 18. axb3 Bb7 19. Nd3 Rxa1 20. Rxa1 Nd7 21. e3 Qb6 22. b4 Ba6 23. Nc5 Nxc5 24. dxc5 Qb7 25. Nd4 e5 26. Nb3 Bc4 27. Na5 Qa6 28. Rc1 Bb5 29. Bf1 Bxf1 30. Rxf1 e4 31. Rc1 Qb5 32. Nb3 Rd8 33. Nd4 Qc4

[Assistant] Nxc6


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

[User] FEN: 8/p4ppk/7p/8/3R4/R4N1P/2q2PP1/6K1 b - - 0 32

[Assistant] Qc1+


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

[User] 1. d4 e6 2. c4 d5 3. Nc3 dxc4 4. e4 Nf6 5. Bxc4 c5 6. e5 cxd4 7. Nb5 Nfd7 8. Qxd4 Nc6 9. Nd6+ Bxd6 10. Qxd6 Ndxe5 11. Qc5 Nxc4 12. Qxc4 Qd4 13. Qb5 Qb4+ 14. Qxb4 Nxb4 15. Ke2 b6 16. Nf3 Ba6+ 17. Ke3 Nd5+ 18. Kd2 O-O

[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. d4 b6 2. Nf3 Bb7 3. c4 Nf6 4. Nc3 e6 5. Qc2 c5 6. Bg5 cxd4 7. Nxd4 Be7 8. Rd1 h6 9. Bh4 a6 10. e4 d6 11. f3 Nbd7 12. Bf2 Qc7 13. Be2 O-O 14. O-O Rac8 15. Rc1 Rfe8 16. Qd2 Qb8 17. Rfd1 Bd8 18. Kh1 Bc7

[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 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. Be2 Nf6 7. a3

[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: r3kb1r/1bq2ppp/p2ppB2/2n5/3NPP2/1BQ5/PPP3PP/2KRR3 b kq - 0 14

[Assistant] gxf6


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

[User] 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. g3 d5 6. Bg2 dxc4 7. Nf3 Nc6 8. a3 Be7 9. e3 Na5 10. O-O c5 11. Rd1 Nb3 12. Rb1 cxd4 13. Nxd4 Nxd4 14. Rxd4 Qc7 15. Ne4 Nxe4 16. Bxe4 f5 17. Rxc4 Qb6 18. Bg2 Rd8 19. b4 Bd7 20. Bb2 Rac8 21. Rc1 Rxc4 22. Qxc4 Rc8 23. Qd3 Rxc1+ 24. Bxc1 Bc6 25. Bb2 Bxg2 26. Kxg2 Qc6+ 27. Kg1 Kf7 28. Qc3 Qxc3 29. Bxc3 g5 30. Bd4

[Assistant] a6


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

[User] 1. e4 g6 2. d4 Bg7 3. f3 d6 4. c3

[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 g6 2. Nf3 Bg7 3. Bf4 d6 4. c3 Nf6 5. e3 O-O 6. h3 c5 7. Be2 Nc6 8. O-O cxd4 9. exd4 Nd5 10. Bh2 e5 11. c4 Nf4 12. d5 Nxe2+ 13. Qxe2 Ne7 14. Nc3 h6 15. Rad1 b6 16. b4 a5 17. a3 axb4 18. axb4 Ba6 19. Ra1 f5 20. Nd2 Qc7 21. Rxa6 Rxa6 22. c5 Raa8 23. Nb5 Qd7 24. cxd6 Nxd5 25. Qc4 Qf7 26. Nf3 Nf4 27. Qxf7+ Rxf7 28. Bxf4 exf4 29. Rd1 Rd8 30. Nfd4 Bxd4 31. Rxd4 Rfd7 32. Rxf4 Rxd6 33. Nxd6 Rxd6 34. Rc4 Kf7 35. f4 Ke6 36. g4 fxg4 37. hxg4 Kd5 38. Rc7 Ke4 39. Rf7 Rd4 40. b5 Rb4 41. Rf6 Rxb5 42. Rxg6 Kxf4 43. Rxh6 Kxg4 44. Kf2 Kf4 45. Rh4+ Ke5 46. Ke3 Kd6 47. Kd3 Rc5

[Assistant] Rd4+


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

[User] 1. d4 c6 2. c3 d5 3. Nf3 Nf6 4. g3 Bg4 5. Bg2 Bxf3 6. Bxf3 g6 7. O-O Bg7 8. Bf4 Nbd7 9. e3 O-O 10. Nd2 Re8 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 Nf6 14. Bg2

[Assistant] Nd5


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. Bd3 b5 11. Rhe1 Bb7 12. Nd5

[Assistant] Nxd5


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

[User] 1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. f5 Nge7 7. fxe6 fxe6 8. d3 d5 9. Bb3 Nd4 10. O-O Nxb3 11. axb3 O-O 12. Bg5 Qd7 13. Bxe7 Qxe7 14. exd5 exd5 15. Nxd5 Qd6 16. Nc3 Bg4 17. Ne4 Qc6 18. h3 Bxf3 19. Rxf3 Rxf3 20. Qxf3 Rf8 21. Qe2 Bxb2 22. Rf1 Bd4+ 23. Kh1 Rxf1+ 24. Qxf1 Qe6 25. Qf3 b5 26. g4 a5 27. Kg2 a4 28. bxa4 bxa4 29. Ng5 Qd7 30. Qa8+ Kg7 31. Ne4 h6 32. Qa5 Qb7 33. Qxa4 Qf7 34. Qb3 Qd7 35. Qb6 h5 36. g5 h4 37. Qd6 Qf7 38. Nf6 Bxf6 39. Qxf6+ Qxf6 40. gxf6+ Kxf6 41. Kf3 Ke5 42. c3 Kf5 43. d4 cxd4 44. cxd4 g5 45. d5 Ke5 46. Kg4 Kxd5 47. Kxg5 Ke5 48. Kxh4 Kf4 49. Kh5 Kf5 50. h4 Kf6 51. Kh6 Kf7 52. h5 Kf6 53. Kh7 Kf7 54. h6 Kf8 55. Kg6 Kg8

[Assistant] h7+


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

[User] 1. g3 c6 2. Bg2 d5 3. Nf3 g6 4. O-O Bg7 5. c4 Nf6 6. cxd5 cxd5 7. d4 Nc6 8. Nc3 O-O 9. Bf4 Bf5 10. a3 a6 11. Bd2 Rc8 12. e3 Na5 13. Ne5 Nc4 14. Nxc4 dxc4 15. Bxb7 Rb8 16. Bf3 Bd3 17. Be2 Rxb2 18. Bxd3 cxd3 19. Rb1 Rxb1 20. Qxb1 Qc8 21. Qxd3 Nd7 22. Rc1 Nb6 23. Qe2 Qb7 24. Ne4 Qxe4 25. Qd1 Nd5 26. Be1 Nxe3 27. fxe3 Qxe3+ 28. Bf2 Bxd4 29. Bxe3 Bxe3+ 30. Kg2 Bxc1 31. Qxc1 e6 32. Qc6 Kg7 33. Qxa6 e5 34. Qd3 e4 35. Qxe4 f5 36. Qd4+ Kh6 37. a4 Re8 38. Kh3

[Assistant] Re2


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

[User] 1. d4 c5 2. d5 Nf6 3. c4 g6 4. Nc3 Bg7 5. a4 d6 6. Nf3 O-O 7. e4 e6 8. dxe6 Bxe6 9. Bf4 Nc6 10. Be2 Re8 11. Qxd6 Qxd6 12. Bxd6 b6 13. O-O Rad8 14. Rad1 Bg4 15. Bc7 Rxd1 16. Rxd1 Nxe4 17. Nxe4 Rxe4 18. h3 Rxe2 19. hxg4 Bxb2 20. Bf4 Kg7 21. Rd7 Nd4 22. Rxa7 Nxf3+ 23. gxf3 Bd4 24. Bg3 Re1+ 25. Kg2 Ra1 26. Ra6 h6 27. Rxb6 Rxa4 28. Rd6 Rxc4 29. f4 Rc2 30. f5 gxf5 31. gxf5 Rd2 32. f6+ Bxf6 33. Rxd2 c4 34. Rc2 c3 35. Bf4

[Assistant] Kg6


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

[User] FEN: rq4k1/4bbpp/p3N3/3p4/1P4Q1/P2BP3/6PP/2R3K1 b - - 2 23

[Assistant] Qe5


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

[User] FEN: 3r2k1/4n2R/7Q/1p4Pp/p2pP3/3P4/2PK2q1/8 w - - 5 48

[Assistant] Kc1


[System] You are a chess 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 f5 6. a3 Nh6 7. h4 Nf7 8. b4

[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: 3r4/pp5k/3p1r1p/4pp1Q/1P5P/P1q2P2/6RK/3R4 w - - 2 30

[Assistant] Rdg1


[System] You are a chess 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/ppQ2rpp/2n5/1q6/8/8/P5PP/5R1K w - - 0 22

[Assistant] Qxf7+


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

[User] FEN: 1k2q3/1pp5/1r1b4/5QR1/1PpP3P/P3p3/1K2P3/7B b - - 0 36

[Assistant] Qa4


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

[User] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 b5 8. Bg2 Bb7 9. g5 Nfd7

[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: 1r2k2r/pb3ppp/3b1q2/2pN4/8/8/PPPQ1PPP/2KR1B1R b k - 0 14

[Assistant] Bxd5


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

[User] 1. Nc3 c6 2. d4 d6 3. e4 g6 4. e5 Bg7 5. exd6 exd6 6. Nf3 Nf6 7. Be2 O-O 8. O-O Bf5 9. h3 d5 10. Nh4 Be4 11. Nxe4 Nxe4 12. Nf3 Nd7 13. c3 Re8 14. Be3 f5 15. Bd3 Qc7 16. Bg5 Bf6 17. Bxf6 Ndxf6 18. Ne5 Rxe5 19. dxe5 Qxe5 20. f3 Nc5 21. Re1 Qd6 22. Bc2 Nh5 23. Qd4 Ne6 24. Qe5 Qxe5 25. Rxe5 Kf7 26. Rae1 Nhg7 27. Kh2 Rd8 28. g4 Rd7 29. Kg3 f4+ 30. Kg2 Kf6 31. h4 h6 32. Kh3 g5 33. h5 Rd6 34. Bg6 Ke7 35. b4 Kf6 36. a4 a6 37. a5 Rd7 38. Bf5 Rd6 39. Bxe6 Nxe6 40. Rf5+ Kg7 41. Rfe5 Kf6 42. Rf5+ Kg7 43. Ree5

[Assistant] Nd8


[System] You are a chess 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. Nc3 Nxd5 4. Qf3 Nb4 5. Bc4 e6 6. Bb3 N8c6 7. Nge2 Na5 8. Ne4 Nxb3 9. Qxb3 Qd5 10. O-O Qxe4 11. Nc3 Qxc2 12. Qc4 Bd6 13. a3 Nd3 14. b3 Nxc1 15. Rfxc1 Qg6 16. Nb5 O-O

[Assistant] Nxc7