Chess puzzle (Advantage)
Opening: Philidor_Defense, Philidor_Defense_Other_variations
Moves: 1. e4 d6 2. Nf3 e5 3. Bc4 Bg4 4. h3 Bxf3 5. Qxf3 Nf6 6. d3 Nc6 7. Bg5 Be7 8.
Bxf6 Bxf6 9. O-O Nd4 10. Qd1 O-O 11. c3 a5 *
Position (FEN): r2q1rk1/1pp2ppp/3p1b2/p3p3/2BnP3/2PP3P/PP3PP1/RN1Q1RK1 w - - 0 12
White to move.
Themes:  Middlegame  
Puzzle rating: 1391
Best move: cxd4