Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Marshall_Gambit
Moves: 1. e4 e6 2. d4 d5 3. Nc3 c5 4. exd5 exd5 5. dxc5 d4 6. Bb5+ Nc6 7. Bxc6+ bxc6
8. Ne4 Bf5 9. Qe2 Be7 10. Nd6+ Kf8 11. Nxf5 Bxc5 12. Nf3 Qa5+ 13. Bd2 Bb4 14.
N5xd4 Re8 15. O-O-O Rxe2 16. Bxb4+ Qxb4 17. Nxe2 Ne7 *
Position (FEN): 5k1r/p3nppp/2p5/8/1q6/5N2/PPP1NPPP/2KR3R w - - 1 18
White to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 627
Best move: Rd8#