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