Chess puzzle (Checkmate)
Moves: 1. d4 c5 2. e3 e6 3. Nf3 cxd4 4. exd4 d5 5. c3 Nc6 6. Bd3 Nf6 7. O-O Bd6 8. Re1
O-O 9. Qe2 Ne8 10. Bg5 f6 11. Bh4 g5 12. Bg3 Ng7 13. Nbd2 Bxg3 14. hxg3 Re8 15.
Bc2 e5 16. dxe5 fxe5 17. Qe3 h6 18. Rad1 Bg4 19. Ne4 Bxf3 20. Rxd5 Qxd5 21.
Nf6+ Kf7 22. Nxd5 Bxd5 23. Bg6+ Kxg6 24. Qd3+ e4 25. Qxd5 Rad8 26. Qb5 Re7 27.
b4 a6 28. Qc4 Nf5 29. Rxe4 Rxe4 30. Qxe4 Kf6 31. g4 Nfe7 32. Qh7 Ng8 33. Qxb7
Ne5 34. f3 Rd1+ 35. Kh2 Ne7 36. Qxa6+ Kg7 37. Qa7 Kf6 38. a4 Rd2 39. Kg3 N7g6
40. Qb6+ Kf7 41. Qb7+ Kf6 42. Qb6+ Kf7 43. Qe3 Rd3 44. Qe4 Kf6 45. b5 Nf4 46.
Qh7 Rxc3 47. Qxh6+ Neg6 48. Qh1 Rc2 49. Qa1+ Kf7 50. Qf1 Rxg2+ 51. Qxg2 Nxg2
52. Kxg2 Ke6 53. a5 Kd6 54. Kf2 Kc5 55. b6 Kc6 56. Ke3 Kb7 57. Ke4 Nf4 58. Kf5
Nh3 59. Ke5 Nf4 60. Kf6 Nh3 61. Kg6 Ka6 62. Kf7 Kb7 63. Ke6 Ka6 64. Kd5 Kb7 65.
Kc5 Nf4 66. Kb5 Ne6 67. a6+ Kb8 68. Kc6 Nd4+ 69. Kc5 Nxf3 70. b7 Ne5 71. Kb6
Nd7+ 72. Kc6 Ne5+ 73. Kb5 Nxg4 74. Kb6 Ne5 *
Position (FEN): 1k6/1P6/PK6/4n1p1/8/8/8/8 w - - 2 75
White to move.
Themes: Advanced Pawn Endgame, Knight Endgame Mate in 1 
Puzzle rating: 989
Best move: a7#