1. Main line 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 Choose a line 1. Main line 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 Close 1. Main line 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 Next