ECO code: A12
Opening Name: English: Anglo-Indian, 2.g3 c6 3.Nf3 d5 4.b3
Moves: 1. c4 Nf6 2. g3 c6 3. Nf3 d5 4. b3
Description: This line of the English Opening features White fianchettoing the kingside bishop with 2.g3, aiming for strong long-diagonal control. Black responds with a flexible setup involving ...c6 and ...d5, challenging the center. White’s 4.b3 prepares to develop the queenside bishop to b2, reinforcing control over the central and queenside dark squares.
Characteristic of 4.b3: The move 4.b3 is characteristic for supporting the light-squared bishop’s fianchetto on b2, helping White exert pressure on the central and queenside dark squares. It is a subtle, positional move that prepares for solid development rather than immediate confrontation.
Attacking or Defensive: For White, this setup is generally positional and flexible, leaning toward a strategic fight rather than direct attack. White aims to control key squares and build pressure gradually. Black’s ...c6 and ...d5 moves are more assertive in the center, contesting White’s control and aiming to equalize comfortably.
Center Control: White does not immediately occupy the center with pawns but exerts pressure indirectly through piece placement and fianchetto bishops. Black, on the other hand, challenges the center directly with ...d5. Thus, this opening is a mix of indirect central control by White and direct central contest by Black.
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.