Alekhine's Defense: Exchange, Karpov Variation

1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 cxd6 6.Nf3 g6 7.Be2 Bg7 8.O-O O-O 9.h3 Nc6 10.Nc3 Bf5 11.Bf4