Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Baltic_Defense
Moves: 1. d4 d5 2. c4 Bf5 3. Nc3 e6 4. Bf4 Bd6 5. Bxd6 Qxd6 6. Nf3 Nc6 7. cxd5 exd5 8.
e3 Nf6 9. Qb3 O-O-O 10. Bb5 a6 11. Bxc6 Qxc6 12. Rc1 Qc4 13. Qa3 Qc6 14. Ne5
Qe6 15. Nb5 axb5 *
Position (FEN): 2kr3r/1pp2ppp/4qn2/1p1pNb2/3P4/Q3P3/PP3PPP/2R1K2R w K - 0 16
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 624
Best move: Qa8#