Chess puzzle (Checkmate)
Moves: 1. c4 Nf6 2. Nc3 g6 3. e4 Bg7 4. g3 d6 5. Bg2 O-O 6. Nge2 Nbd7 7. O-O c6 8. d3
a5 9. h3 a4 10. f4 Qa5 11. Be3 Qb4 12. Qd2 Re8 13. g4 h6 14. Ng3 Nc5 15. g5
hxg5 16. fxg5 Nfd7 17. d4 Ne6 18. Qd3 Nb6 19. d5 Nc5 20. Qe2 Qxc4 21. Qf3 Rf8
22. dxc6 bxc6 23. Rac1 Nd3 24. Nd5 Nxc1 25. Nxe7+ Kh7 26. Qf4 Ne2+ 27. Nxe2
Qxe2 28. Bf3 Qxe3+ 29. Qxe3 Nc4 30. Qf4 Bd4+ 31. Kh1 Kg7 32. Nxc6 Bxb2 33. e5
Bxh3 34. Qf6+ Kh7 35. Re1 Nxe5 36. Nxe5 Bxe5 37. Rxe5 dxe5 38. Bxa8 Rxa8 39.
Qxe5 Be6 40. a3 Rc8 41. Qh2+ Kg7 42. Qb2+ Kg8 43. Qb5 Rc4 44. Qb8+ Kh7 45. Qh2+
Kg7 46. Qe5+ Kf8 47. Kg2 Ke7 48. Qb8 Kd7 49. Qb7+ Kd6 50. Qb5 Bd5+ 51. Kf2 Re4
52. Qb6+ Ke5 *
Position (FEN): 8/5p2/1Q4p1/3bk1P1/p3r3/P7/5K2/8 w - - 25 53
White to move.
Themes:  Endgame Dovetail Mate, Mate in 1 
Puzzle rating: 1186
Best move: Qf6#