ECO code: A00
Anderssen's Opening e5 2.b3 d5 3.c3 Nf6 begins with the moves 1. a3 e5 2. b3 d5 3. c3 Nf6. This is an uncommon and flexible opening choice for White that aims to control key squares subtly rather than immediately contesting the center.
Characteristic: The moves 1.a3 and 2.b3 prepare to fianchetto the queenside bishop to b2, where it can exert long-range pressure. The early c3 supports a potential d4 push, but White delays direct occupation of the center.
Attacking or Defensive: For White, this opening is generally more positional and somewhat cautious, opting for a solid setup rather than immediate confrontation. Black’s 2...d5 and 3...Nf6 aim to take central space actively, so Black is playing more aggressively in the center.
Center Control: White does not directly attack the center in the opening moves but prepares to challenge it later with c3 and possibly d4. Black, however, immediately stakes a strong claim in the center with pawns on e5 and d5.
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.