Chess puzzle (Checkmate)
Moves: 1. g3 d5 2. Nh3 h5 3. f3 h4 4. g4 f5 5. Nf2 fxg4 6. fxg4 Nf6 7. h3 e6 8. Bg2
Bd6 9. d4 Bg3 10. O-O O-O 11. Bg5 Qd6 12. c3 c5 13. Nd2 Nc6 14. e3 b6 15. e4
Qc7 16. Bxf6 Rxf6 17. exd5 exd5 18. Bxd5+ Kh8 19. Nfe4 Rxf1+ 20. Qxf1 Bb7 21.
Qf5 Qf4 22. Qh5+ Qh6 23. Qxh6+ gxh6 24. dxc5 bxc5 25. Nxc5 Rd8 26. Nxb7 Rxd5
27. Ne4 Rb5 28. Nbd6 Rxb2 29. Nxg3 hxg3 30. a4 Ne5 31. Rf1 Ng6 32. Rf3 Rb1+ 33.
Rf1 Rb2 34. Nf5 Rc2 35. Rf3 Ra2 36. Rxg3 Nf4 37. Re3 Rxa4 38. Nxh6 Ra2 39. Re7
a5 40. Ra7 Nxh3+ 41. Kf1 a4 42. c4 a3 43. c5 Ra1+ 44. Ke2 a2 45. Kd2 Rh1 46. c6
a1=Q 47. Rxa1 Rxa1 48. c7 Ra2+ 49. Kc3 Ra8 50. Nf7+ Kg7 51. Nd6 Nf2 52. Kd4
Nxg4 53. c8=Q Rxc8 54. Nxc8 Nf6 55. Ke5 Ng8 56. Nd6 Nh6 57. Ke6 Nf7 58. Nf5+
Kg6 59. Ne7+ Kg7 60. Nc6 Nh6 61. Ke5 Nf7+ 62. Kf5 Nd8 63. Ne7 Nc6 64. Nd5 Nd4+
65. Kg5 Ne6+ 66. Kg4 Nd4 67. Nf4 Ne6 68. Nh5+ Kf7 69. Ng3 Ke7 70. Ne4 Kd7 71.
Kf5 Kc6 72. Ke5 Nd4 73. Nf6 Kb5 74. Nd5 Ka4 75. Nc3+ Kb3 76. Ne4 Nf3+ 77. Kd5
Kc2 78. Nc5 Nd2 79. Kd4 Kd1 80. Kd3 Nb3 81. Ne4 Ke1 82. Ke3 Kf1 83. Kf3 Kg1 84.
Kg3 Nd2 85. Ng5 Kh1 86. Nh3 Nf1+ 87. Kf2 Nh2 88. Nf4 Nf1 89. Ne2 Nh2 *
Position (FEN): 8/8/8/8/8/8/4NK1n/7k w - - 71 90
White to move.
Themes:  Endgame, Knight Endgame Mate in 1 
Puzzle rating: 814
Best move: Ng3#