Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 Nf6 5. Be2 Bb4 6. Nf3 Bxc3+ 7. bxc3 Ne4
8. Qd3 Bf5 9. Bg5 f6 10. Bf4 Ng3 11. Qe3+ Ne4 12. Nh4 Bd7 13. f3 f5 14. g3 h6
15. fxe4 g5 16. exf5+ Kf7 17. Ng6 Re8 18. Ne5+ Kf6 19. Nxd7+ Nxd7 20. Be5+ Nxe5
21. dxe5+ Rxe5 22. Qd4 Qe7 23. O-O c5 24. Qg4 Rxe2 25. Qh5 Qe3+ 26. Kh1 Qe4+
27. Rf3 Re1+ 28. Rxe1 Qxe1+ 29. Kg2 Qe2+ 30. Kh3 Re8 31. Qg6+ Ke7 32. f6+ Kd8
33. f7 g4+ 34. Qxg4 Rf8 35. Qg8 Qe6+ 36. Qg4 Qe7 37. Qf5 d4 38. Qd5+ Kc7 39.
cxd4 cxd4 40. Qc4+ Kb8 41. Rf5 Qd7 42. Qc5 Rxf7 43. Qe5+ Kc8 44. Qh8+ Kc7 45.
Qe5+ Kb6 46. g4 Rxf5 47. gxf5 d3 48. Qf6+ Kc7 49. cxd3 Qxd3+ 50. Kg4 h5+ 51.
Kxh5 Qh3+ 52. Kg6 Qxh2 53. Qe7+ Kb6 54. f6 Qxa2 55. f7 Qg2+ 56. Kf6 Qf3+ 57.
Ke6 Qe4+ 58. Kd7 Qc6+ 59. Kd8 Qd5+ 60. Qd7 Qg5+ 61. Ke8 Qe5+ 62. Qe7 Qb5+ 63.
Kf8 a5 64. Qe3+ Ka6 65. Qe6+ b6 66. Qc8+ Ka7 67. Qc7+ Ka6 68. Ke7 Qe2+ 69. Kd8
Qd3+ 70. Kc8 Qf5+ 71. Kb8 a4 72. Qc4+ Ka5 73. Ka7 Qd7+ 74. Kb8 Qd8+ 75. Qc8
Qd6+ 76. Qc7 Qf8+ 77. Ka7 a3 78. Qxb6+ Ka4 79. Qc6+ Kb3 80. Qe8 Qc5+ 81. Ka6 a2
82. Qb8+ Kc4 83. Qb2 Qc6+ 84. Ka5 a1=Q+ 85. Qxa1 *
Position (FEN): 8/5P2/2q5/K7/2k5/8/8/Q7 b - - 0 85
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1658
Best move: Qb5#