Chessy
Sicilian Four Knights: Bc4 — A Sharp Choice for Black
You have navigated the Sicilian Four Knights and your opponent has just played 6.Bc4, aiming at the weak f7 square. The position is lively — both sides have developed aggressively, and White is threatening ideas like Nxc6 followed by Qxd8+ to disrupt your pawn structure. This page covers the critical decision point after 6...Bc5, where the engine favours White only slightly, but Black actually scores better in practice. The statistics from over 40,000 games hold a surprise. Play through the key lines below and see how to handle White's most common replies.
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Create a free account →The Critical Moment: What Are You Fighting For?
After 6.Bc4 Bc5, the centre is semi-open and both kings are still in the middle. You are fighting for control of the d-file and the dark squares. Your bishop on c5 already eyes the weak f2 square, while White's bishop on c4 aims at f7. The tension between the knights on d4 and c6 is the central question — whoever resolves it first must be careful not to hand the opponent an edge. White is to move, and the engine's best move is Nxc6, which leads to an exchange of queens and a slightly favourable endgame for White (+0.54). That means you are slightly worse according to the engine, but the practical results tell a different story, as you will see below.
The Engine's Choice: Nxc6 and Its Aftermath
Stockfish recommends Nxc6 (played in 21,991 games), continuing with Nxc6 dxc6 Qxd8+ Kxd8. White gains the bishop pair and leaves Black with a doubled c-pawn — a classic small plus. However, the database shows a surprising outcome: White scores only 45.9% from this line, while Black wins 49.2% of the time. The engine's +0.54 evaluation does not translate into easy play for White in practice. The doubled pawns give Black central control with ...e5 and ...f5 breaks, and the king on d8 can often find safety quickly. As Black, you should not fear this line — it is playable and the statistics are in your favour.
The Most Common Mistakes — and How to Punish Them
White's most popular move is actually a mistake. Be3 (12,618 games, 50.4% White score) is flagged as costing ~1.8 pawns according to the engine. After Be3, you can capture on d4 or simply develop, but the key point is that White's bishop on e3 blocks the queen's defence of the d4-knight, and your dark-squared bishop remains active. Nf3 (2,264 games, 47.3% White score) loses ~0.9 pawns — it retreats the knight and gives up the initiative. Nb3 (1,620 games, 52.0% White score) loses ~0.7 pawns and allows you to reposition your bishop, often to a6 to target the c4-bishop, or to b6 followed by ...0-0. In each case, White fails to capitalise on the tactical pressure that made Nxc6 the engine's top choice.
What the Statistics Reveal
Across all 40,524 games at this position, Black wins 49.2% of the time, White wins 47.3%, and only 3.5% end in draws. That is a remarkable practical edge for Black in a position the engine evaluates as slightly favourable for White (+0.54). The reason is clear: most club players do not find the precise Nxc6 continuation, and even when they do, Black has comfortable play. The worst move for White statistically is Bg5 (312 games), where White scores just 31.1% — an excellent outcome for you. The Sicilian Four Knights with Bc4 is a fully sound choice for Black, and you can enter it with confidence.
Results across 40,524 Lichess games
| Most-played continuation | Games | White wins |
|---|---|---|
| Nxc6 | 21,991 | 45.9% |
| Be3 | 12,618 | 50.4% |
| Nf3 | 2,264 | 47.3% |
| Nb3 | 1,620 | 52.0% |
| Ndb5 | 979 | 48.4% |
| Bg5 | 312 | 31.1% |
Frequently asked questions
Is the Sicilian Four Knights with Bc4 good for Black?
Yes, it is perfectly playable. While the engine gives White a small edge (+0.54), Black actually wins 49.2% of the time in the database — better than White's 47.3%. The practical results favour Black at the club level.
Should I be worried if White plays Nxc6?
No. Nxc6 is the engine's top move, but in practice White scores only 45.9% from that line. After 7.Nxc6 dxc6 8.Qxd8+ Kxd8, Black has doubled c-pawns but the king is safe and central control is solid. The position is fully playable.
What is White's biggest mistake in this position?
Be3 is the worst mistake, losing about 1.8 pawns according to the engine. Nf3 and Nb3 are also inaccuracies. If your opponent plays any of these, you have excellent chances to take over the game.
How often do draws occur in this opening?
Very rarely — only 3.5% of games end in a draw. This is a sharp, fighting opening where both sides play for a win, making it ideal if you want an unbalanced game.