Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 d5 2. e3 Nf6 3. Nf3 Bg4 4. Be2 e6 5. Nbd2 c5 6. dxc5 Bxc5 7. a3 O-O 8. b4
Bd6 9. Bb2 Ne4 10. c4 Nxd2 11. Qxd2 dxc4 12. Qd4 Bxf3 *
Position (FEN): rn1q1rk1/pp3ppp/3bp3/8/1PpQ4/P3Pb2/1B2BPPP/R3K2R w KQ - 0 13
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 824
Best move: Qxg7#