Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Bird_Gambit
Moves: 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. c3 dxc3 5. Nxc3 c6 6. Bc4 Be7 7. O-O Bg4 8.
Qd3 Nf6 9. e5 Bxf3 *
Position (FEN): rn1qk2r/pp2bppp/2pp1n2/4P3/2B5/2NQ1b2/PP3PPP/R1B2RK1 w kq - 0 10
White to move.
Themes:  Opening  
Puzzle rating: 1572
Best move: exf6