Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Bc5 5. c3 Nxe4 6. d4 exd4 7. Re1 Qe7 8.
Bxc6 dxc6 9. cxd4 Bb6 10. Ng5 f5 11. f3 O-O 12. fxe4 fxe4 13. Rxe4 Qb4 14. Qb3+
Qxb3 15. axb3 Bf5 16. Re7 Bxd4+ 17. Kh1 Bxb1 18. Rxb1 *
Position (FEN): r4rk1/ppp1R1pp/2p5/6N1/3b4/1P6/1P4PP/1RB4K b - - 0 18
Black to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 622
Best move: Rf1#