E04Black2 book lines continue
Open Defense, Modern Sharp Variation
Catalan Opening1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Nc6 6. Qa4 Bb4+
Also known as Catalan: Open, 5.Nf3 Nc6 6.Qa4 Bb4+, Catalan Opening, Open Defense, Modern Sharp Variation, Catalan.