Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Bd3 Bxe4 6. Bxe4 Nf6 7. Bf3 e6 8.
Ne2 Be7 9. Be3 O-O 10. c3 Nbd7 11. O-O Nd5 12. Be4 N7f6 13. Qd3 Nxe4 14. Qxe4
Nf6 15. Qd3 Qc7 16. Ng3 Rad8 17. Rad1 Ng4 18. h3 Nxe3 19. Qxe3 Bd6 20. Ne4 Bf4
21. Qf3 Qb8 22. Rd3 Bc7 23. Qh5 Rd5 24. Qg4 f5 25. Qh4 fxe4 26. Re3 Rf4 27. Qg3
Rf3 28. Qg4 Rxe3 29. fxe3 Rf5 30. Re1 Qf8 31. Qxe4 e5 32. Qg4 exd4 33. cxd4 Kh8
34. e4 Rf4 35. Qd7 Rf7 36. Qe6 Re7 37. Qc4 Qf4 38. Rf1 Qh2+ 39. Kf2 Bg3+ 40.
Ke2 Qxg2+ 41. Kd1 Qxe4 *
Position (FEN): 7k/pp2r1pp/2p5/8/2QPq3/6bP/PP6/3K1R2 w - - 0 42
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 1022
Best move: Rf8#