ECO A88: Dutch Defense

ECO A88 is part of volume A — Flank Openings. The Lichess chess-openings dataset files one named line under it. It is Dutch Defense: Leningrad Variation, Warsaw Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 c6.

That position has come up in 204,250 Lichess games between players rated 1600 to 2500: White won 49.0%, 6.8% were drawn and Black won 44.2%.