Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nc3 d6 3. f4 Nc6 4. Nf3 a6 5. Bc4 Qc7 6. a3 e6 7. d3 Nf6 8. O-O Be7
9. Qe1 O-O 10. Qh4 Nxe4 11. Ng5 Nxg5 12. fxg5 d5 13. Ba2 Nd4 14. Bf4 Qd8 15.
Rac1 Nf5 16. Qg4 d4 17. Ne2 e5 18. Bxe5 Ne3 19. Qf4 Nxf1 20. Rxf1 Be6 21. b3 f6
22. gxf6 Bxf6 23. Bd6 Be7 24. Qe5 Rxf1+ 25. Kxf1 Qd7 26. Bxc5 Rf8+ 27. Kg1 Bxc5
28. Qxc5 Qf7 29. Ng3 Qf2+ 30. Kh1 Qf1+ 31. Nxf1 *
Position (FEN): 5rk1/1p4pp/p3b3/2Q5/3p4/PP1P4/B1P3PP/5N1K b - - 0 31
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 1123
Best move: Rxf1#