ECO D71: Neo-Grünfeld Defense

ECO D71 is part of volume D — Closed & Semi-Closed Games. The Lichess chess-openings dataset files one named line under it. It is Neo-Grünfeld Defense: Exchange Variation: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5.

That position has come up in 53,851 Lichess games between players rated 1600 to 2500: White won 50.7%, 7.0% were drawn and Black won 42.3%.