Philidor Defense: Hanham, Lion Variation

1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Nc3 Ngf6 5.Bc4 Be7 6.O-O O-O 7.Re1 c6 8.a4 a5 9.Ba2 exd4 10.Nxd4 Nc5