Slav Defense: Exchange, Symmetrical Line

1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5 5.Nc3 Nc6 6.Bf4 Bf5 7.e3 a6 8.Bd3 Bxd3 9.Qxd3