ECO E35: Nimzo-Indian Defense

ECO E35 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files one named line under it. It is Nimzo-Indian Defense: Classical Variation, Noa Variation: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5.

That position has come up in 99,226 Lichess games between players rated 1600 to 2500: White won 51.5%, 6.7% were drawn and Black won 41.8%.