ECO E66: King's Indian Defense

ECO E66 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files one named line under it. It is King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5.

That position has come up in 110,281 Lichess games between players rated 1600 to 2500: White won 48.2%, 6.1% were drawn and Black won 45.8%.