Chess puzzle (Checkmate)
Opening: Vienna_Game, Vienna_Game_Stanley_Variation
Moves: 1. e4 e5 2. Nc3 Bc5 3. Bc4 Nc6 4. Qg4 Qf6 5. Nd5 Qxf2+ 6. Kd1 d6 7. Qxg7 Kd8 8.
Qxh8 Qxg2 9. Nf6 Bg4+ 10. Nxg4 Qxg4+ 11. Be2 Qg2 12. Bf3 *
Position (FEN): r2k2nQ/ppp2p1p/2np4/2b1p3/4P3/5B2/PPPP2qP/R1BK2NR b - - 3 12
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1420
Best move: Qf1#