Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Bc4 d6 5. O-O g5 6. h4 g4 7. Ng5 Nh6 8. Rxf4
Ne5 9. Bb3 f6 10. Ne6 Bxe6 11. Bxe6 Qe7 12. Bb3 O-O-O 13. d3 Bg7 14. Nc3 c6 15.
Be3 Kb8 16. a4 Ng6 17. Rf1 Nxh4 18. Bxh6 Bxh6 19. Qxg4 Bg5 20. Ne2 h5 21. Qg3
Ng6 22. Nd4 h4 23. Qh3 Nf4 24. Qg4 Qe5 25. Nf5 d5 26. Rae1 d4 27. Rf2 Rdf8 28.
Ref1 Nh5 29. Nxh4 Ng3 30. Rf5 Nxf5 31. Rxf5 Be3+ 32. Kf1 Qe7 33. Nf3 Qh7 34.
Qg3+ Ka8 35. Ke2 Rhg8 36. Bxg8 Rxg8 37. Qh3 Qxh3 38. gxh3 Rg2+ 39. Kf1 Rf2+ 40.
Ke1 Rxc2 41. Rxf6 Rxb2 *
Position (FEN): k7/pp6/2p2R2/8/P2pP3/3PbN1P/1r6/4K3 w - - 0 42
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 843
Best move: Rf8#