Nimzo-Indian Defense: Classical Variation

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 O-O 5.e4 d5 6.e5 Ne4 7.Bd3 c5 8.Nf3 cxd4 9.Nxd4 Nd7 10.Bf4 Ndc5 11.O-O Bxc3 12.bxc3