Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. O-O O-O 6. d3 h6 7. a3 d6 8. h3 a6
9. Re1 Re8 10. Be3 Nd4 11. Ba2 Ba7 12. Nd2 Be6 13. Bc4 Bxc4 14. Nxc4 b5 15. Nd2
c6 16. Nf3 Qe7 17. Nb1 Nxf3+ 18. Qxf3 Bxe3 19. Rxe3 d5 20. c3 d4 21. cxd4 exd4
22. Re1 Qe5 23. Nd2 c5 24. Rac1 Nh7 25. Nb3 Rac8 26. Nd2 Ng5 27. Qg4 Re6 28. f4
Nxh3+ 29. Qxh3 Qxf4 30. Nf3 Rce8 31. Rxc5 Rg6 32. Kh1 Rg3 33. Qf5 Rxf3 34. gxf3
Qh4+ 35. Kg2 Qxe1 36. Rc8 Qe2+ 37. Kg3 Rxc8 38. Qxc8+ Kh7 39. Qf5+ Kg8 40. Qc8+
Kh7 41. Qf5+ Kh8 42. Qxf7 Qxd3 43. e5 Kh7 44. e6 Qg6+ 45. Kf4 Qg5+ 46. Ke4 Qe3+
47. Kd5 Qb3+ 48. Kxd4 Qxb2+ 49. Kd5 Qb3+ 50. Kc6 Qc4+ 51. Kb6 Qd4+ 52. Kxa6
Qd6+ 53. Kxb5 Qd5+ 54. Kb4 Qd4+ 55. Kb5 Qd5+ 56. Kb6 Qd6+ 57. Kb7 Qd5+ 58. Kc7
Qc5+ 59. Kd8 Qa5+ 60. Ke8 Qa8+ 61. Ke7 Qb7+ 62. Kd6 Qb6+ 63. Ke5 Qc5+ 64. Kf4
Qg5+ 65. Ke4 Qh4+ 66. f4 Qe1+ 67. Kd5 Qd2+ 68. Kc6 Qc3+ 69. Kd7 Qd4+ 70. Ke8
Qa4+ 71. Qd7 Qa8+ 72. Ke7 Qxa3+ 73. Kf7 Qf3 74. Qd4 Qh5+ 75. Kf8 Qf5+ 76. Ke7
h5 77. Kd6 Qf8+ 78. e7 Qb8+ 79. Ke6 Qc8+ 80. Kf7 *
Position (FEN): 2q5/4PKpk/8/7p/3Q1P2/8/8/8 b - - 4 80
Black to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1756
Best move: Qg8#