Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 Qb6 8. Nf3
cxd4 9. cxd4 f6 10. exf6 Nxf6 11. O-O Bd6 12. Bf4 Bxf4 13. Nxf4 O-O 14. g3 Qxb2
15. Re1 Qa3 16. Ng5 h6 17. Ngxe6 Bxe6 18. Rxe6 Nxd4 19. Bh7+ Kxh7 20. Qxd4 Rae8
21. Rxe8 Rxe8 22. Nxd5 Nxd5 23. Qxd5 Re7 24. Qf5+ g6 25. Qf6 Qb4 26. Kg2 Qe4+
27. Kg1 Qe5 28. Qxe5 Rxe5 29. h4 Kg7 30. Rc1 Kf6 31. Kg2 Re2 32. a4 Re4 33. Rc7
Rb4 34. a5 h5 35. a6 bxa6 36. Rc6+ Kf7 37. Rxa6 Rb7 38. Kf3 Kg7 39. Kf4 Rf7+
40. Kg5 *
Position (FEN): 8/p4rk1/R5p1/6Kp/7P/6P1/5P2/8 b - - 6 40
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 710
Best move: Rf5#