Chess puzzle (Checkmate)
Moves: 1. e4 c6 2. d3 d5 3. Qf3 dxe4 4. dxe4 Nf6 5. Bg5 Bg4 6. Qe3 *
Position (FEN): rn1qkb1r/pp2pppp/2p2n2/6B1/4P1b1/4Q3/PPP2PPP/RN2KBNR b KQkq - 4 6
Black to move.
Themes:  Opening Mate in 1 
Puzzle rating: 862
Best move: Qd1#