ECO code: A00
Anderssen's Opening e5 2.b3 d5 arises after the moves 1. a3 e5 2. b3 d5. This is an unusual and somewhat offbeat opening choice for White, aiming to fianchetto the queenside bishop early while Black immediately stakes a claim in the center.
Characteristic: White’s early a3 and b3 moves prepare to develop the bishop to b2, exerting long-range pressure on Black’s center and queenside. However, these moves do not directly challenge the center at first, allowing Black to establish a strong pawn presence with ...e5 and ...d5.
Attacking or Defensive: For White, this setup is generally more positional and somewhat cautious rather than aggressively attacking. Black’s response with ...e5 and ...d5 is assertive and aims to take the initiative in the center. Thus, Black plays more actively, while White adopts a flexible but less direct approach.
Center Control: Black clearly attacks and occupies the center early with pawns on e5 and d5. White’s strategy does not immediately challenge the center but seeks to undermine it later with pressure from the fianchettoed bishop and possible pawn 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.