Chess puzzle (Checkmate)
Moves: 1. d4 g6 2. c4 Bg7 3. Nf3 Nf6 4. Nc3 O-O 5. Bf4 d6 6. e3 c5 7. Bd3 cxd4 8. exd4
Bg4 9. O-O Nbd7 10. Qe2 Re8 11. Rac1 e5 12. dxe5 dxe5 13. Bg5 Qc7 14. Bxf6 Nxf6
15. Be4 Nxe4 16. Nxe4 f5 17. Nc3 e4 18. Nd5 Qc5 19. b4 Qf8 20. Qc2 Rac8 21. Ne1
f4 22. f3 exf3 23. Nxf3 Bxf3 24. Rxf3 Bd4+ 25. Kh1 Be3 26. Rcf1 Qh6 27. Nf6+
Kg7 28. Nxe8+ Rxe8 29. Qc3+ Kg8 30. Qf6 Rf8 31. Qe6+ Kh8 32. Rxe3 fxe3 33.
Rxf8+ Qxf8 34. Qxe3 Qxb4 35. Qe8+ Kg7 36. Qd7+ Kh6 37. Qh3+ Kg7 38. Qd7+ Kh6
39. Qh3+ Kg5 40. Qe3+ Kf5 41. Qd3+ Ke6 42. Qd5+ Ke7 43. Qf7+ Kd6 44. Qd5+ Kc7
45. Qf7+ Kb6 46. Qe6+ Ka5 47. Qd5+ Ka6 48. h3 Qb1+ 49. Kh2 Qxa2 *
Position (FEN): 8/pp5p/k5p1/3Q4/2P5/7P/q5PK/8 w - - 0 50
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1094
Best move: Qb5#