Home › Openings › Nimzo-Indian Defense › Nimzo-Indian Defense: Classical Variation › Nimzo-Indian Defense: Classical Variation, Berlin Variation Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation ECO E39 · 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O Related variationsNimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner VariationNimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System Practice this opening · Play against the computer