Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Declined_Variation
Moves: 1. e4 Nc6 2. Nf3 d5 3. exd5 Qxd5 4. Nc3 Qa5 5. d3 e5 6. Bd2 Qc5 7. Qe2 Nf6 8.
O-O-O Bg4 9. h3 Bh5 10. g4 Bg6 11. Nh4 O-O-O 12. Nxg6 hxg6 13. Bg2 Nd4 14. Qe1
Bd6 15. Ne4 Nxe4 16. Qxe4 *
Position (FEN): 2kr3r/ppp2pp1/3b2p1/2q1p3/3nQ1P1/3P3P/PPPB1PB1/2KR3R b - - 0 16
Black to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 514
Best move: Qxc2#