Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Chigorin_Variation
Moves: 1. d4 Nf6 2. Nc3 d5 3. Nf3 e6 4. Bf4 c5 5. dxc5 Bxc5 6. e3 Nc6 7. Bd3 a6 8. e4
dxe4 9. Nxe4 Nxe4 10. Bxe4 Qf6 11. Bg5 Qxb2 12. Bxc6+ bxc6 *
Position (FEN): r1b1k2r/5ppp/p1p1p3/2b3B1/8/5N2/PqP2PPP/R2QK2R w KQkq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1159
Best move: Qd8#