ECO E91: King's Indian Defense

ECO E91 is part of volume E — Indian Defenses. The Lichess chess-openings dataset files 2 named lines under it. The shortest is King's Indian Defense: Orthodox Variation: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2.

That position has come up in 5,131,627 Lichess games between players rated 1600 to 2500: White won 50.1%, 6.0% were drawn and Black won 43.9%.