ECO E18
3 named openings and variations are classified as E18. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Queen's Indian Defense: Classical Variation, Tiviakov DefenseE181. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Na6
- Queen's Indian Defense: Classical Variation, Traditional VariationE181. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3
- Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch LineE181. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 d5