1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 Choose a line 1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 Close 1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Qb3 Next