Chess puzzle (Checkmate)
Opening: Ruy_Lopez, Ruy_Lopez_Classical_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+
8. Qxd2 Nxe4 9. Qe3 Qe7 10. O-O O-O 11. Re1 Re8 12. Nc3 Nxc3 13. Qxc3 Qf8 14.
Rxe8 Qxe8 15. Re1 Qd8 16. Qe3 a6 17. Qe8+ Qxe8 *
Position (FEN): r1b1q1k1/1ppp1ppp/p1n5/1B6/3P4/5N2/PP3PPP/4R1K1 w - - 0 18
White to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 990
Best move: Rxe8#