Chess puzzle (Checkmate)
Moves: 1. d4 b6 2. c4 Bb7 3. Nc3 e6 4. e4 Bb4 5. Bd3 Nf6 6. Qe2 O-O 7. Nf3 c5 8. d5
exd5 9. cxd5 Re8 10. O-O Bxc3 11. bxc3 Nxd5 12. Qc2 Nf6 13. Bg5 h6 14. Bxf6
Qxf6 15. e5 Qe6 16. Rfe1 Bxf3 17. gxf3 Nc6 18. f4 a6 19. Be4 Rad8 20. Rad1 Na5
21. Bh7+ Kh8 22. f5 Qc6 23. Rd6 Qf3 24. Re3 Qg4+ 25. Rg3 Qh5 26. f6 gxf6 27.
Rxf6 Rxe5 28. Qd3 Rg5 29. Kh1 Rxg3 30. fxg3 Nc6 31. Rxc6 dxc6 32. Qxd8+ Kxh7
33. Qd3+ Kg7 34. Qxa6 Qf5 35. Kg2 Qc2+ 36. Kh3 Qb2 37. c4 Qb4 38. Qb7 Qxc4 39.
Qxb6 Qxa2 40. Qxc5 Qd5 41. Qc3+ f6 42. Qb4 c5 43. Qg4+ Qg5 44. Qd7+ Kg6 45.
Qe8+ Kf5 46. Qd7+ Ke4 47. Qc6+ Kd3 48. Qf3+ Kc2 49. Qe2+ Kb3 50. Qd3+ Kb4 51.
Qb1+ Kc3 52. Qa1+ Kd3 53. Qa3+ Kd4 54. Qb2+ Ke4 55. Qc2+ Kd5 56. Qd3+ Ke6 57.
Qc4+ Qd5 58. Qa6+ Ke5 59. Qa1+ Qd4 60. Qe1+ Qe4 61. Qc3+ Kd5 62. Qb3+ c4 63.
Qb7+ Kd4 64. Qb6+ Kd3 65. Qb1+ Kd4 66. Qb6+ Kc3 67. Qa5+ Kd3 68. Qa6 Kc2 69.
Qa4+ Kd2 70. Qa2+ Qc2 71. Qa5+ c3 72. Qd5+ Qd3 73. Qg2+ Kc1 74. Qf1+ Qd1 75.
Qf4+ Kb2 76. Qf2+ Qd2 77. Qb6+ Kc1 78. Qa5 c2 *
Position (FEN): 8/8/5p1p/Q7/8/6PK/2pq3P/2k5 w - - 0 79
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1023
Best move: Qa1#