Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Queens_Knight
Moves: 1. e4 e6 2. Nc3 Bc5 3. Bc4 Qf6 4. d3 *
Position (FEN): rnb1k1nr/pppp1ppp/4pq2/2b5/2B1P3/2NP4/PPP2PPP/R1BQK1NR b KQkq - 0 4
Black to move.
Themes: Attacking f2 or f7 Opening Mate in 1 
Puzzle rating: 698
Best move: Qxf2#