Chess puzzle (Checkmate)
Opening: Vienna_Game, Vienna_Game_Vienna_Gambit
Moves: 1. e4 e5 2. Nc3 Nf6 3. f4 exf4 4. e5 Qe7 5. Qe2 Ng8 6. Nd5 Qd8 7. d4 d6 8. Bxf4
Be6 9. exd6 Bxd6 10. Bxd6 Qxd6 11. Qe4 Ne7 12. Nf6+ gxf6 13. O-O-O Bf5 14. Qxb7
Qd7 15. Qxa8 Qa4 16. Qb7 *
Position (FEN): 1n2k2r/pQp1np1p/5p2/5b2/q2P4/8/PPP3PP/2KR1BNR b k - 2 16
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 643
Best move: Qxc2#