ECO code: A00
Anderssen's Opening e5 2.g3 begins with the unusual move 1. a3 followed by 2. g3 in response to Black's 1... e5. This setup aims to fianchetto the kingside bishop early, preparing to control the long diagonal and support central and flank play.
Characteristic: The moves 1. a3 and 2. g3 are flexible and somewhat waiting moves, avoiding immediate confrontation in the center. The early a3 often prevents Black's pieces from developing comfortably to b4, while g3 signals a kingside fianchetto, enhancing White's control over the dark squares.
From White's perspective, this opening is more positional and preparatory rather than outright attacking. It focuses on solid development and control of key squares rather than immediate aggression.
Regarding central control, White does not directly challenge the center on the first moves. Instead, White aims to exert influence through the fianchettoed bishop and flexible pawn structure, leaving options open for later central breaks.
This opening is defined by the position shown on the board below. The moves displayed are a typical sequence that leads to it, but different sequences can reach the same position and still carry the same opening name.