The King's Indian Attack via the Réti Opening arises after 1.Nf3 Nf6 2.g3 g6. ECO code: A05.

Overview

Both sides fianchetto their king's bishops, creating a symmetrical structure on the kingside. This is one of the most common and flexible setups arising from the Réti move order.

Main Lines

Play typically continues 3.Bg2 Bg7 4.0-0 0-0, and the game's direction depends on the central pawn structures chosen by both sides. White may play d3 and e4 (King's Indian Attack), or c4 and d4 (transposing into King\'s Indian Defence reversed).

Strategic Themes & Plans

In the double-fianchetto structure, the central battle is postponed, and strategic manoeuvring replaces early tactical conflict. Both bishops exert latent pressure on the long diagonals, and the first player to break the symmetry with a central pawn advance often dictates the middlegame character.