ECO code: A00
Anderssen's Opening e5 2.b3 d5 3.c3 Nf6 4.d3 Nc6 5.e3 begins with the unusual 1.a3, known as Anderssen's Opening. This setup is characterized by a slow and flexible approach, avoiding early central confrontation and focusing on solid development.
The moves 2.b3 and 3.c3 support a setup aiming for a strong pawn structure and control over key squares, while 4.d3 and 5.e3 reinforce the center and prepare for a safe, harmonious development of the minor pieces.
Characteristic: This opening is somewhat unorthodox and flexible, often used to sidestep well-known theory. The early moves aim at controlling central squares indirectly rather than immediate central occupation.
Playing as White: The approach is more defensive and positional than attacking. White delays direct central challenges, instead building a solid foundation and waiting for Black to commit.
Playing as Black: Black can take advantage of White’s slow start by seizing central space early with moves like ...e5 and ...d5, leading to an active central presence.
Center Control: White does not directly attack the center in the opening moves but maintains a supportive pawn structure that can later challenge or reinforce control. Black, however, occupies the center more aggressively.
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.