E59 Nimzo-Indian, 4.e3, Main line (1 d4 Sf6 2 c4 e6 3 Sc3 Lb4 4 e3 O-O 5 Sf3 d5 6 Ld3 c5 7 O-O Sc6 8 a3 Lxc3 9 bxc3 dxc4 10 Lxc4)