1. Main line 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 Choose a line 1. Main line 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 2. Main line, 4... Be7 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7 Close 1. Main line 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 2. Main line, 4... Be7 1. Nf3 Nf6 2. g3 d5 3. Bg2 e6 4. O-O Be7 Next