ECO E02: Catalan Opening

ECO E02 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files one named line under it. It is Catalan Opening: Open Defense: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4.

That position has come up in 160,290 Lichess games between players rated 1600 to 2500: White won 51.2%, 6.5% were drawn and Black won 42.3%.