ECO C09: French Defense

ECO C09 is part of volume C — Open Games. The Lichess chess-openings dataset files one named line under it. It is French Defense: Tarrasch Variation, Open System, Main Line: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6.

That position has come up in 210,375 Lichess games between players rated 1600 to 2500: White won 52.1%, 6.8% were drawn and Black won 41.1%.