Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 Bg4 5. d4 Bxf3 6. Qxf3 exd4 7. e5 Nc6 8. Bb5
Ne7 9. O-O dxe5 10. fxe5 O-O 11. b4 Bb6 12. Bf4 dxc3+ 13. Kh1 Nd4 14. Qd3 Nxb5
15. Qxb5 Qd4 16. Na3 Rad8 17. Nc2 Qe4 18. Rac1 Ng6 19. Bg3 Rd2 20. Ne1 c6 21.
Qa4 Qe2 22. Rg1 Bxg1 23. Kxg1 Qe3+ 24. Kh1 Nxe5 25. Bxe5 Rf2 26. Nd3 Qxc1+ 27.
Nxc1 *
Position (FEN): 5rk1/pp3ppp/2p5/4B3/QP6/2p5/P4rPP/2N4K b - - 0 27
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 657
Best move: Rf1#