ECO code: A00
Anderssen's Opening e5 Variation begins with the uncommon 1. a3, aiming to control the b4-square and prepare for a flexible queenside setup. The sequence 1... e5 2. b3 d5 3. c3 Nf6 4. d3 Nc6 5. e3 Bd6 6. f3 O-O leads to a solid, somewhat slow buildup.
Characteristic: This line is characterized by White's gradual and restrained approach, focusing on firm pawn structure and piece development without early direct confrontation in the center. The moves b3 and c3 support a flexible pawn chain and prepare for a later d4 push, although White postpones immediate central tension.
Attacking or Defensive: From White's perspective, this setup is more defensive and positional, aiming for a stable and solid position rather than immediate attacks. Black’s moves, especially ...d5 and ...Nc6, stake a strong claim in the center and facilitate piece activity, giving Black a slight initiative in central control.
Center Control: Black clearly occupies the center early with ...d5 and ...e5, while White adopts a more reserved posture, focusing on supporting squares and preparing to challenge the center later. Thus, this opening does not involve White aggressively attacking the center at the start, but rather prepares for a potential central break in the midgame.
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.