Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d5 5. g3 dxc4 6. Qa4+ Nfd7 7. Qxc4 Nb6 8.
Qd3 O-O 9. Bg2 Nc6 10. Be3 Bf5 11. Qd1 Nb4 12. Rc1 Nc4 13. b3 Nxe3 14. fxe3 c5
15. O-O Rc8 16. a3 Nc2 17. e4 Ne3 18. Qd3 Nxf1 19. exf5 cxd4 20. fxg6 fxg6 21.
Ne4 Ne3 22. Rxc8 Qxc8 23. Nxd4 Nxg2 24. Kxg2 Rd8 25. e3 Bxd4 26. exd4 Qd7 27.
Qc4+ Kh8 28. Qf7 Qxd4 29. Qxe7 Qd7 30. Qf6+ Kg8 31. Ng5 Qd2+ 32. Kh3 Qd7+ 33.
Kg2 Rf8 34. Qe5 a6 35. h4 h6 36. Ne4 Kh7 37. Nf6+ Rxf6 38. Qxf6 Qd2+ 39. Kh3
Qd7+ 40. Kg2 Qd5+ 41. Kh3 Qd7+ 42. Kh2 h5 43. b4 Qd2+ 44. Kh3 Qd7+ 45. Kh2 Kh6
46. Qf4+ Kg7 47. Qe3 Qd6 48. Qc3+ Kh7 49. a4 b6 50. a5 bxa5 51. bxa5 Kh6 *
Position (FEN): 8/8/p2q2pk/P6p/7P/2Q3P1/7K/8 w - - 1 52
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1259
Best move: Qh8#