Chess puzzle (Checkmate)
Moves: 1. e4 d5 2. exd5 Qxd5 3. Nf3 Bg4 4. Be2 Nc6 5. O-O O-O-O 6. d3 e5 7. Be3 Nf6 8.
Nc3 Qd7 9. h3 Bf5 10. Qd2 h6 11. Nh2 g5 12. g4 Be6 13. Qe1 Bb4 14. f3 Nd5 15.
Bd2 Nf4 16. Ne4 Nxh3+ 17. Kg2 Bxd2 18. Qxd2 Nf4+ 19. Kg1 f5 20. gxf5 Bxf5 21.
Ng3 Bg6 22. Ng4 h5 23. Nf2 h4 24. Nge4 Bxe4 25. fxe4 Nd4 26. Bg4 Nde6 27. Nh3
Qg7 28. Nxf4 gxf4 29. Qg2 Qe7 30. Qh3 Rde8 31. Kf2 Kb8 32. c3 Ng5 33. Qh2 h3
34. Ke2 f3+ 35. Bxf3 Nxf3 36. Rxf3 Qg5 37. Rg1 Qh4 38. Qg3 h2 39. Rh1 Reg8 40.
Qxh4 Rxh4 41. Rf2 Rg3 *
Position (FEN): 1k6/ppp5/8/4p3/4P2r/2PP2r1/PP2KR1p/7R w - - 2 42
White to move.
Themes:  Endgame, Rook Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 1184
Best move: Rf8#