Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Albin_Countergambit
Moves: 1. d4 d5 2. c4 e5 3. cxd5 Qxd5 4. Nf3 e4 5. Nc3 Qf5 6. Ne5 f6 7. Qa4+ Bd7 8.
Nxd7 Nxd7 9. e3 a6 10. Bb5 O-O-O 11. Bxa6 bxa6 12. Qxa6+ Kb8 13. Nb5 Bb4+ 14.
Kf1 Nb6 15. Qa7+ Kc8 *
Position (FEN): 2kr2nr/Q1p3pp/1n3p2/1N3q2/1b1Pp3/4P3/PP3PPP/R1B2K1R w - - 7 16
White to move.
Themes: Queenside Attack Opening Mate in 1 
Puzzle rating: 921
Best move: Qxc7#