Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 h6 5. Bf4 a6 6. Nf3 Nf6 7. Bd3 Bg4 8. h3
Bxf3 9. Qxf3 c6 10. Be5 e6 11. O-O-O Nd5 12. Nxd5 cxd5 13. Qg4 Qg5+ 14. Qxg5
hxg5 15. f4 gxf4 16. Bxf4 Nd7 17. Rhf1 Nf6 18. c3 Rd8 19. b4 Bd6 20. Bxd6 Rxd6
21. Kd2 O-O 22. g4 b5 23. g5 Nh5 24. Rf3 f5 25. gxf6 Nxf6 26. Rg1 Ne4+ 27. Bxe4
dxe4 28. Rxf8+ Kxf8 29. Rg4 e5 30. Rxe4 exd4 31. Rxd4 Rh6 32. Rd3 Ke7 33. Kc2
Ke6 34. Kb3 Ke5 35. a4 bxa4+ 36. Kxa4 Ke4 37. Rg3 g6 38. c4 Kd4 39. c5 Kd5 40.
Ka5 g5 41. Rxg5+ Kc6 42. Rg3 Kb7 43. Rd3 Ka7 44. Rd6 Rxh3 45. c6 *
Position (FEN): 8/k7/p1PR4/K7/1P6/7r/8/8 b - - 0 45
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 987
Best move: Ra3#