ECO code: D20
Opening Name: Queen's Gambit Accepted (QGA): 3.Nc3 a6 4.a4
Moves: 1. d4 d5 2. c4 dxc4 3. Nc3 a6 4. a4
Description: In this line of the Queen's Gambit Accepted, Black plays 3...a6 aiming to prepare ...b5 to support the c4-pawn and hold onto the extra pawn. White responds with 4.a4 to immediately challenge Black's queenside expansion and prevent ...b5. This move is characteristic for its proactive approach in stopping Black's pawn thrust and gaining space on the queenside.
Characteristic of the move 4.a4: This move is primarily a prophylactic and positional measure. It restricts Black's queenside counterplay by preventing ...b5, which is Black's main idea to hold onto the pawn and gain space. White thus maintains pressure on Black's position and keeps the initiative.
Attacking or Defensive: From White's perspective, 4.a4 is an attacking move in a positional sense, aiming to limit Black's counterplay and secure queenside space. For Black, playing ...a6 is somewhat defensive, preparing to support the c4-pawn and avoid immediate White attacks.
Center Control: The Queen's Gambit Accepted inherently contests the center early on. While 4.a4 itself does not directly attack the center, it supports White's overall strategy of regaining the pawn and maintaining central influence. White continues to exert pressure on the center through piece development and pawn breaks following this sequence.
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.
Practice puzzles and train your tactics with real positions from games that used the QGA: 3.Nc3 a6 4.a4, and sharpen your opening mastery.
Puzzle 1 of 3 - Move #8 black