Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. e3 dxc4 5. Bxc4 Bb4 6. Qc2 Nc6 7. h3 Ne4 8. Nf3
Nxc3 9. bxc3 Bd6 10. O-O O-O 11. Bd3 h6 12. a4 e5 13. Re1 exd4 14. exd4 Be6 15.
Ba3 Bxa3 16. Rxa3 Bd5 17. Be4 Re8 18. Raa1 Bxe4 19. Rxe4 Qf6 20. Rf1 a5 21.
Rfe1 Red8 22. Ne5 Ne7 23. Nxf7 Kxf7 24. Rxe7+ Qxe7 25. Rxe7+ Kxe7 26. Qg6 Kf8
27. f4 Rd6 28. Qh7 Kf7 29. f5 Rf6 30. g4 Re8 31. Kf2 Re4 32. Kf3 Re1 33. Qh8
Rc1 34. Qc8 Rxc3+ 35. Ke4 b6 36. Qb7 Rxh3 37. Qxc7+ Kg8 38. Qc4+ Kh8 39. d5 Rg3
40. Kf4 Rg1 41. Qc8+ Kh7 42. Qc4 g5+ 43. Ke5 Kg7 44. Qc7+ Rf7 45. Qc6 Rxg4 46.
Qg6+ Kf8 47. Qxh6+ Ke8 48. Qc6+ Kf8 49. f6 Rf4 *
Position (FEN): 5k2/5r2/1pQ2P2/p2PK1p1/P4r2/8/8/8 w - - 1 50
White to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 612
Best move: Qa8#