Chess puzzle (Checkmate)
Moves: 1. e4 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Nxd5 Qxd5 5. d4 Nc6 6. Nf3 Bg4 7. c4 Qe6+
8. Be2 Bxf3 9. gxf3 O-O-O 10. Be3 Qd6 11. d5 Ne5 12. Qa4 a6 13. O-O-O e6 14. c5
Qe7 15. c6 Qb4 16. cxb7+ Kb8 17. Qxb4 Bxb4 18. dxe6 fxe6 19. Bxa6 Ba5 20. f4
Nc6 21. a3 Bb6 22. Bxb6 cxb6 23. Rxd8+ Rxd8 24. Rg1 g6 25. Re1 Nd4 26. Rd1 Ka7
27. Bc4 Kxb7 28. Re1 Rd6 29. b3 Kc6 30. a4 Kd7 31. Kb2 Nf3 32. Re3 Nxh2 33. Rh3
Ng4 34. Rxh7+ Kc6 35. Rg7 Rd2+ 36. Kc1 Rxf2 37. Rxg6 Rxf4 38. Rxe6+ Kc5 39. Rg6
Ne3 40. Rg5+ Kb4 41. Rb5+ Kc3 42. Rxb6 Nxc4 43. bxc4 *
Position (FEN): 8/8/1R6/8/P1P2r2/2k5/8/2K5 b - - 0 43
Black to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 1181
Best move: Rf1#