1. Main line 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6 Choose a line 1. Main line 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6 Close 1. Main line 1. d4 Nf6 2. Nf3 g6 3. e3 Bg7 4. Bd3 d6 Next