Chess puzzle (Checkmate)
Opening: Caro-Kann_Defense, Caro-Kann_Defense_Other_variations
Moves: 1. e4 c6 2. d4 d5 3. Nc3 h6 4. Nf3 Bg4 5. h3 Bh5 6. g4 Bg6 7. Bd3 e6 8. Bd2 Ne7
9. Ne5 Bh7 10. Qf3 f6 11. exd5 fxe5 12. dxe6 Bxd3 *
Position (FEN): rn1qkb1r/pp2n1p1/2p1P2p/4p3/3P2P1/2Nb1Q1P/PPPB1P2/R3K2R w KQkq - 0 13
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 1031
Best move: Qf7#