1.d4 d5 2.c4 dxc4 Against 3.e4: 3...e5 4.Nf3 exd4 5.Bxc4 Nc6 6.0-0 Be6 7.Bxe6 fxe6 Against 3.Nf3: 3...Nf6 4.e3 e6 5.Bxc4 c5 6.0-0 a6 7.Qe2 b5 Against 3.e3: 3...e5 4.Bxc4 exd4 5.exd4 Nf6 6.Nc3 Be7 Against 3.Nc3: 3...Nf6 4.e3 a6 5.Bxc4 b5 6.Bb3 Bb7