ECO D99: Grünfeld Defense

ECO D99 is part of volume D — Closed & Semi-Closed Games. The Lichess chess-openings dataset files 2 named lines under it. The shortest is Grünfeld Defense: Russian Variation, Smyslov Variation: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Bg4 8. Be3 Nfd7 9. Qb3.

That position has come up in 196 Lichess games between players rated 1600 to 2500: White won 53.1%, 9.2% were drawn and Black won 37.8%.