How to Play the Queen's Gambit Accepted: Central Variation, Greco Variation: Nc3 as Black

After 1.d4 d5 2.c4 dxc4 3.e4 b5 4.Nc3 a6, Black has invested heavily in the queenside. Your c4-pawn is defended by b5, and a6 stops White's bishop from hitting b5 with a later a4. The plan is simple: keep the extra pawn, develop solidly, and don't let White's centre steamroll you. If White plays quietly, you can aim for e6, Bb7, Nd7, and Be7, slowly untangling. If White pushes with a4, you'll have to decide whether to advance the b-pawn or let it get captured — either way, the game stays tense. This is a fight for the initiative, not a passive defence.

The engine's top choice is Nf3, continuing with e6, a4, and b4. White develops naturally while keeping the option of a queenside break. After Nf3, you should play e6 — it opens lines for your bishops, controls d5, and prepares to develop your kingside. From there, when White plays a4, your best reply is b4, keeping the pawn chain intact. This leads to a complex middlegame where both sides have chances. Across 103,605 games, White scores only 50.7% from this line — nearly a coin flip, which confirms you are in fine shape.

In the 436,835 games that reached this position, White wins 51.7%, draws 4.1%, and Black wins 44.3%. That slight gap is normal for a White-first position, but the 4.1% draw rate is unusually low — this opening produces decisive results. You'll rarely escape with a draw; you'll either convert your extra pawn or get crushed. The engine evaluation of -0.23 (a small plus for Black) backs this up: you are slightly better if you know the ideas. The most popular move, a4 (184,497 games), gives White a commanding 55.3% score — so you need a precise answer. Your best response to a4 is b4, just as in the engine line, to keep the pawn structure alive and start counterplay.

Three subpar moves appear frequently at club level, and you should be ready to strike. a3 is the worst — a full mistake costing about 1.0 pawns. White weakens the queenside without gaining anything. Your reply? Advance with b4 immediately, clamping down on c3 and starting your own play. Bf4, an inaccuracy (losing ~0.7 pawns), develops the bishop too early. White should have played a4 instead. Against Bf4, you can play Bb7 or Nf6, developing with tempo. Finally, b3 (an inaccuracy, ~0.6 pawns) tries to recapture the pawn but leaves White's centre vulnerable. Meet b3 with Bb7 or even e5, challenging the d4 centre directly. In all three cases, the engine says White should have played either Nf3 or a4 — so when they don't, punish them.