The King's Gambit Accepted: Nc6 Line — Your Guide to Playing White

From the position after 4.d4, Black has tried many replies, and the database of over 2.8 million games gives us clear signals. The most popular move is 4...d5 (760,166 games), where White still scores 53.9% — decent but not your best chance. The second most common, 4...d6 (624,336 games), sees White jump to 56.3%, yet the engine flags it as an inaccuracy that loses about 0.7 pawns compared to better alternatives. Even more punishing: 4...Bb4+ (312,309 games) is labelled a full mistake costing roughly 1.1 pawns, even though White wins 58.9% of those games. What do these numbers tell you? Black often chooses moves that look natural but let you seize the initiative.

Stockfish's best move for Black is 4...g5, which has been played 276,357 times. The engine's continuation runs g5 d5 g4 dxc6 — an aggressive pawn scuffle. This is the move Black should play to keep the position balanced. If your opponent finds it, you're in a fight, but your +0.33 edge means you're still slightly better. Notice that g5 attacks your f4 pawn and tries to build a pawn chain. Your response d5 strikes back in the centre immediately, which is exactly the right idea when Black lunges on the kingside. This line is the benchmark — anything else from Black gives you a larger advantage.

Three of Black's most-played replies are not just suboptimal — they're genuine errors you can exploit. First, 4...d6 is an inaccuracy. It looks like a solid developing move, but Black should be striking with g5 instead. Second, 4...Bb4+ is a mistake costing about 1.1 pawns. That check gives you tempi — you'll likely block with c3, gaining time and space. Third, 4...Qe7 is another inaccuracy, losing about 0.9 pawns. This early queen sortie wastes a move and makes the queen a target. In all three cases, the engine says Black should have played g5. When your opponent plays anything else, you can feel confident pushing your advantage.

Since 4...d5 is Black's most common choice by far (760,166 games), you'll want a plan ready. White scores 53.9% here — solid but unspectacular. The position becomes an open fight for the centre. Your pawn on d4 clashes with Black's d5 pawn, and the tension usually resolves with exchanges on d5 or with e4-e5 if Black doesn't capture. Keep your development natural: Bc4 or Be2, castles, and look to put pressure on Black's kingside where you still have that extra f-pawn dynamic. With Black's king often stuck in the centre for a while after ...exf4, your bishops and queen can become dangerous quickly.