English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto
ECO A15
Move order
1. c4 Nf6 2. Nf3 g6 3. g3 b6 4. Bg2 Bb7
Ideas
ECO A covers irregular and flank openings—systems that skip the main e4/d4 fight early. White controls d5 without committing the d-pawn—the English family. 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.