Queen's Indian Defense, with e3
ECO E14
Move order
1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 Be7 5. d4 O-O 6. b3 b6 7. cxd5 exd5 8. Bb2 Bb7 9. Bd3
Ideas
ECO E covers Indian defenses and related systems where Black fianchettoes or pressures the center from the flanks. White develops a knight and keeps flexible transpositions into d4 or c4 setups. This entry tracks a longer branch in the opening tree. Use the diagram and SAN list to recognize the tabiya, then try the line against Maia to explore typical plans in practice.