ECO C17: French Defense

ECO C17 is part of volume C — Open Games. The Lichess chess-openings dataset files 9 named lines under it. The shortest is French Defense: Winawer Variation, Advance Variation: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5.

That position has come up in 2,002,189 Lichess games between players rated 1600 to 2500: White won 48.6%, 5.1% were drawn and Black won 46.3%.