Chess puzzle (Checkmate)
Opening: Scotch_Game, Scotch_Game_Potter_Variation
Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Nge7 7. Qe2 a5 8.
a4 Nb4 9. Bf4 O-O 10. O-O-O d5 11. exd5 Nexd5 12. Nxd5 Nxd5 13. Bd2 Qf6 14. f4
Bf5 15. Qf3 Qc6 16. c4 Nb4 17. Qxc6 *
Position (FEN): r4rk1/1pp2ppp/1bQ5/p4b2/PnP2P2/1N6/1P1B2PP/2KR1B1R b - - 0 17
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1502
Best move: Na2#