Chess puzzle (Checkmate)
Opening: Nimzowitsch_Defense, Nimzowitsch_Defense_Kennedy_Variation
Moves: 1. d4 e5 2. dxe5 Nc6 3. e4 Nxe5 4. Nf3 Bd6 5. Nxe5 Bxe5 6. Bc4 Nf6 7. Bg5 d6 8.
Nc3 Bd7 9. f4 Bxc3+ 10. bxc3 h6 11. Bxf6 Qxf6 12. O-O O-O-O 13. Rb1 Qxc3 14.
Qe2 f6 15. Ba6 bxa6 *
Position (FEN): 2kr3r/p1pb2p1/p2p1p1p/8/4PP2/2q5/P1P1Q1PP/1R3RK1 w - - 0 16
White to move.
Themes: Queenside Attack Middlegame Mate in 1 
Puzzle rating: 661
Best move: Qxa6#