Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 c6 3. e3 Bf5 4. Bd3 Bxd3 5. Qxd3 Nf6 6. c4 e6 7. Nc3 Bb4 8. a3
Ba5 9. c5 Bc7 10. Nge2 O-O 11. O-O Nbd7 12. Rac1 Re8 13. Rfe1 e5 14. dxe5 Nxe5
15. Qf5 Nc4 16. Rc2 Bxf4 17. Nxf4 Qe7 18. Nd3 Ne5 19. Nxe5 Qxe5 20. Qxe5 Rxe5
21. Ne2 Rae8 22. Nd4 Re4 23. Rd1 h6 24. b4 a6 25. Nf5 R4e6 26. Nd6 R8e7 27. h3
g6 28. a4 Ne4 29. Nc8 Re8 30. Nb6 h5 31. Rb1 Kg7 32. b5 cxb5 33. axb5 Nxc5 34.
Rxc5 Rxb6 35. Rxd5 Ree6 36. Rd2 Rxb5 37. Rxb5 axb5 38. Rb2 Rb6 39. Kf1 Kf6 40.
Ke2 Ke5 41. Kd3 f5 42. Kc3 Kd5 43. Kb4 Kc6 44. Rd2 Ra6 45. Rc2+ Kb6 46. Rd2
Ra4+ 47. Kb3 Rc4 48. Rd6+ Rc6 49. Rd7 Ka6 50. Rg7 b6 51. f3 Ka5 *
Position (FEN): 8/6R1/1pr3p1/kp3p1p/8/1K2PP1P/6P1/8 w - - 1 52
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 446
Best move: Ra7#