Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 a6 6. Nc3 Nge7 7. Bc4 Nxd4 8.
Bxd4 Nc6 9. Be3 Be7 10. Qg4 g6 11. f4 d6 12. a3 d5 13. Ba2 d4 14. O-O-O Qb6 15.
Bf2 Bc5 16. Na4 Qb5 17. Nxc5 Qxc5 18. c3 Qb5 19. cxd4 e5 20. f5 exd4 21. Qf4
Qc5+ 22. Kb1 Bd7 23. fxg6 Be6 24. gxf7+ Kd7 25. Bxe6+ Kxe6 26. e5 Raf8 27. Qf6+
Kd7 28. e6+ Kc8 29. Bxd4 Qd5 30. Rhe1 h5 31. e7 Nxe7 32. Qxe7 Rxf7 33. Qe6+
Qxe6 34. Rxe6 Rd8 35. Rc1+ Kb8 36. Be5+ Ka8 37. Rh6 Rd5 38. Bg3 Rd2 39. Rc8+
Ka7 40. Rxh5 b5 41. Rc2 Rd1+ 42. Ka2 Kb7 43. Rhc5 Rdd7 44. h4 Rg7 45. R2c3 Rdf7
46. h5 Rh7 47. Re5 Rfg7 48. Kb3 Rd7 49. Rec5 Rdf7 50. Kb4 Rd7 51. a4 Rd4+ 52.
Ka5 *
Position (FEN): 8/1k5r/p7/KpR4P/P2r4/2R3B1/1P4P1/8 b - - 2 52
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1090
Best move: Rxa4#