ECO E90
3 named openings and variations are classified as E90. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- King's Indian Defense: Larsen VariationE901. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3
- King's Indian Defense: Normal Variation, Rare DefensesE901. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3
- King's Indian Defense: Zinnowitz VariationE901. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5