1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 Choose a line 1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 Close 1. Main line 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 Next