Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 a6 5. cxd5 exd5 6. Bf4 c6 7. e3 Bd6 8. Bg3
O-O 9. Bd3 Re8 10. O-O Bxg3 11. hxg3 Ne4 12. Qc2 Qe7 13. Bxe4 dxe4 14. Nd2 Bf5
15. Rab1 Nd7 16. b4 Nf6 17. a4 Rad8 18. b5 axb5 19. axb5 c5 20. dxc5 Qxc5 21.
Rfc1 Rc8 22. Nb3 Qe5 23. Nd4 Nd5 24. Qb2 Nxc3 25. Rxc3 Rxc3 26. Qxc3 Rc8 27.
Qa3 Be6 28. Rc1 Rxc1+ 29. Qxc1 f5 30. Qa3 Bd5 31. Qc5 Kf7 32. Qc8 Kf6 33. Qd8+
Kg6 34. Ne2 Kf7 35. Qd7+ Kf8 36. Nf4 Bf7 37. Qxb7 g5 38. Qc8+ Kg7 39. Ne2 Qxb5
40. Nd4 Qb1+ 41. Kh2 Bg6 42. Qd7+ Kh6 43. Nxf5+ Bxf5 44. Qxf5 Qc2 45. Qf6+ Kh5
46. g4+ Kxg4 47. Qe6+ Kh5 48. g4+ Kh4 49. Qh6+ Kxg4 *
Position (FEN): 8/7p/7Q/6p1/4p1k1/4P3/2q2P1K/8 w - - 0 50
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 903
Best move: Qh3#