ECO A99: Dutch Defense

ECO A99 is part of volume A — Flank Openings. The Lichess chess-openings dataset files one named line under it. It is Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d6 7. Nc3 Qe8 8. b3.

That position has come up in 9,565 Lichess games between players rated 1600 to 2500: White won 53.7%, 5.5% were drawn and Black won 40.8%.