Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Hyperaccelerated_Fianchetto
Moves: 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 d6 6. Be3 Nc6 7. Qd2 Nf6 8. f3
Nd7 9. O-O-O a5 10. h4 Nc5 11. Nxc6 bxc6 12. Bxc5 dxc5 *
Position (FEN): r1bqk2r/4ppbp/2p3p1/p1p5/4P2P/2N2P2/PPPQ2P1/2KR1B1R w kq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 669
Best move: Qxd8#