Chess puzzle (Crushing)
Opening: Russian_Game, Russian_Game_Cochrane_Gambit
Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Nc3 d5 6. e5 Ng4 7. Qf3+ Qf6 *
Position (FEN): rnb2b1r/ppp2kpp/5q2/3pP3/6n1/2N2Q2/PPPP1PPP/R1B1KB1R w KQ - 3 8
White to move.
Themes:  Opening  
Puzzle rating: 1541
Best move: exf6