Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bg4 5. Be2 Nf6 6. h3 Bh5 7. O-O Bd6 8.
Re1 O-O 9. Bg5 Nbd7 10. c3 Re8 11. Nbd2 c6 12. Nh2 Bxe2 13. Rxe2 Rxe2 14. Qxe2
Bxh2+ 15. Kxh2 Qe8 16. Qf1 Qf8 17. Re1 Re8 18. Nf3 Rxe1 19. Qxe1 Ne4 20. Be3
Qd6+ 21. Kg1 Ndf6 22. Qd1 c5 23. Ne5 cxd4 24. cxd4 Qb6 25. Qc2 Qd8 26. Qb3 Qc7
27. Qa4 a6 28. g4 b5 29. Qb3 Nc5 30. Qc3 Nfe4 31. Qc1 f6 32. dxc5 fxe5 33. c6
d4 34. Bg5 Nxg5 35. Qxg5 Qxc6 36. Qxe5 d3 37. Qb8+ Kf7 38. Qf4+ Kg8 39. Qd4
Qc1+ 40. Kg2 d2 41. Qd5+ Kf8 42. Qd8+ Kf7 43. Qd7+ Kf6 44. g5+ Kxg5 45. Qxg7+
Kf5 46. Qd7+ Ke5 47. Qe7+ Kd5 48. Qf7+ Kc5 49. Qc7+ Kb4 50. Qe7+ Ka4 *
Position (FEN): 8/4Q2p/p7/1p6/k7/7P/PP1p1PK1/2q5 w - - 11 51
White to move.
Themes:  Endgame, Queen Endgame Mate in 1 
Puzzle rating: 1302
Best move: Qa3#