Chess puzzle (Checkmate)
Moves: 1. e4 c5 2. Nf3 Nc6 3. c3 e5 4. d4 cxd4 5. cxd4 Bb4+ 6. Nc3 Qa5 7. Bd2 exd4 8.
Nd5 Bxd2+ 9. Nxd2 Nb4 10. Nxb4 Qxb4 11. b3 Nf6 12. Bc4 Nxe4 13. O-O Nxd2 14.
Re1+ Kd8 15. Qe2 Nxc4 16. bxc4 Qc5 17. Qg4 g6 18. Qh4+ Kc7 19. Qf4+ d6 20.
Qxf7+ Bd7 21. Re7 Rad8 22. Ree1 d3 23. Red1 a6 24. Rxd3 Rhf8 25. Qxh7 Qxf2+ 26.
Kh1 Qf1+ 27. Rxf1 *
Position (FEN): 3r1r2/1pkb3Q/p2p2p1/8/2P5/3R4/P5PP/5R1K b - - 0 27
Black to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 400
Best move: Rxf1#