ECO A89: Dutch Defense

ECO A89 is part of volume A — Flank Openings. The Lichess chess-openings dataset files one named line under it. It is Dutch Defense: Leningrad Variation, Matulovic Variation: 1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. O-O O-O 6. c4 d6 7. Nc3 Nc6.

That position has come up in 129,983 Lichess games between players rated 1600 to 2500: White won 46.0%, 7.1% were drawn and Black won 46.9%.