1. Main line 1. b4 d5 Choose a line 1. Main line 1. b4 d5 2. Main line, 3. Nf3 1. b4 d5 2. Bb2 Nf6 3. Nf3 Close 1. Main line 1. b4 d5 2. Main line, 3. Nf3 1. b4 d5 2. Bb2 Nf6 3. Nf3 Next