Queen's Indian Defense: Kasparov Variation, Petrosian Variation

1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.a3 Bb7 5.Nc3 d5 6.cxd5 Nxd5 7.Qc2 Be7 8.e4 Nxc3 9.bxc3 O-O 10.Bd3 c5 11.O-O Qc7 12.Qe2