Home › Openings › Catalan Opening › Catalan Opening: Open Defense Catalan Opening: Open Defense, Classical Line ECO E05 · 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 Be7 Related variationsCatalan Opening: Open Defense, Modern Sharp VariationCatalan Opening: Open Defense, Alekhine Variation Practice this opening · Play against the computer