Chess puzzle (Checkmate)
Opening: Pirc_Defense, Pirc_Defense_Classical_Variation
Moves: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 Nf6 5. Be3 Nbd7 6. h3 e5 7. Qd2 exd4 8.
Nxd4 Ne5 9. O-O-O c5 10. Ndb5 a6 11. Nxd6+ Kf8 12. f4 Nc6 13. Bxc5 Ne7 14. e5
Nd7 15. Nxc8 Qxc8 16. Qxd7 Qxc5 17. Qd8+ Rxd8 *
Position (FEN): 3r1k1r/1p2npbp/p5p1/2q1P3/5P2/2N4P/PPP3P1/2KR1B1R w - - 0 18
White to move.
Themes:  Middlegame Back Rank Mate, Mate in 1 
Puzzle rating: 1368
Best move: Rxd8#