Queen's Gambit Accepted: Classical, Main Line

1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Qxd1 8.Rxd1 Bxc5 9.b3