Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Nf3 d6 3. c4 Nbd7 4. Nc3 e5 5. Bg5 e4 6. Nxe4 Be7 7. Nxf6+ Nxf6 8.
e3 O-O 9. Bd3 Re8 10. O-O Bg4 11. h3 Bh5 12. Be2 Ne4 13. Bxe7 Qxe7 14. Rc1 Rac8
15. Nd2 Bg6 16. Nxe4 Bxe4 17. Bd3 f5 18. Bxe4 Qxe4 19. c5 d5 20. Qf3 g6 21.
Qxe4 Rxe4 22. b4 c6 23. a4 a6 24. Rb1 f4 25. Rfe1 fxe3 26. Rxe3 Rce8 27. Rxe4
Rxe4 28. Rd1 Kf7 29. f3 Re2 30. Kf1 Rb2 31. b5 axb5 32. axb5 Rxb5 33. Ke2 Kf6
34. Kd3 Kf5 35. Rd2 Kf4 36. Ke2 h5 37. Kf2 h4 38. Re2 Rb4 39. Re6 g5 *
Position (FEN): 8/1p6/2p1R3/2Pp2p1/1r1P1k1p/5P1P/5KP1/8 w - - 0 40
White to move.
Themes:  Endgame, Rook Endgame Mate in 1 
Puzzle rating: 853
Best move: Rf6#