Chess puzzle (Checkmate)
Moves: 1. f4 Nc6 2. Nf3 d5 3. d4 Bg4 4. e3 Nf6 5. Be2 e6 6. O-O Bd6 7. Ne5 Bf3 8. Bxf3
O-O 9. Nc3 Ne7 10. Bg4 c5 11. f5 cxd4 12. exd4 Qb6 13. fxe6 fxe6 14. Bxe6+ Kh8
15. Bg5 Bxe5 16. Bxf6 Bxf6 17. Bxd5 Bxd4+ 18. Kh1 Rxf1+ 19. Qxf1 Bxc3 20. Bb3
Bxb2 21. Re1 Ng6 22. Qf7 Qf6 23. Qxb7 Rf8 24. h3 Qf2 25. Rd1 Be5 26. Qd5 Qf1+
27. Rxf1 *
Position (FEN): 5r1k/p5pp/6n1/3Qb3/8/1B5P/P1P3P1/5R1K b - - 0 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 822
Best move: Rxf1#