ECO E22: Nimzo-Indian Defense

ECO E22 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files one named line under it. It is Nimzo-Indian Defense: Spielmann Variation: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3.

That position has come up in 399,605 Lichess games between players rated 1600 to 2500: White won 47.9%, 5.5% were drawn and Black won 46.6%.