Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c6 6. Nf3 c5 7. Be3 cxd4 8. Nxd4
Nc6 9. Bd3 g6 10. Qe2 a6 11. O-O-O Nxd4 12. Bxd4 Bc5 13. Bxc5 Nxc5 14. Kb1 Nxd3
15. Rxd3 Bd7 16. g4 Qe7 17. f5 gxf5 18. gxf5 O-O-O 19. f6 Qc5 20. a3 Bb5 21.
Nxb5 Qxb5 22. Rc3+ Kb8 23. Qxb5 axb5 24. Rd1 Rc8 25. Rxc8+ Kxc8 26. Rg1 Kd7 27.
Rg7 Rf8 28. Rxh7 d4 29. Kc1 Kc6 30. Kd2 Kd5 31. Rh5 Rg8 32. Kd3 Rg2 33. Rh7 Rf2
34. Rxf7 Rxh2 35. Rd7+ Kxe5 36. f7 Rf2 37. Rxb7 Rf3+ 38. Kd2 Ke4 39. Ke2 e5 40.
Re7 Rf6 41. Kd2 Rf2+ 42. Ke1 Rf6 43. b3 Kf4 44. a4 bxa4 45. bxa4 e4 46. a5 Ke3
47. a6 Rxa6 48. f8=Q *
Position (FEN): 5Q2/4R3/r7/8/3pp3/4k3/2P5/4K3 b - - 0 48
Black to move.
Themes:  Endgame, Queen and Rook Endgame Mate in 1 
Puzzle rating: 484
Best move: Ra1#