Chess puzzle (Checkmate)
Opening: Philidor_Defense, Philidor_Defense_Exchange_Variation
Moves: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 h6 5. Bc4 Be6 6. Bxe6 fxe6 7. O-O Nc6 8.
Qa4 Ne7 9. Nc3 a6 10. Be3 Qd7 11. Rad1 O-O-O 12. e5 d5 13. b4 g5 14. b5 axb5
15. Qa8+ Nb8 16. Ba7 Nc6 17. Nxb5 Nxa7 *
Position (FEN): Qnkr1b1r/nppq4/4p2p/1N1pP1p1/8/5N2/P1P2PPP/3R1RK1 w - - 0 18
White to move.
Themes: Queenside Attack Middlegame Mate in 1, Smothered Mate 
Puzzle rating: 1068
Best move: Nxa7#