Opening Leak Lab

Sicilian Defense: Open

B32 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4

Black scores 49.2% here across 2,016 club games — but the 3.7% who answer e6 score 32.0%, 17 points worse.

What Black actually plays here

Across 2,016 games from a Lichess-derived book of club play, Black scores 49.2% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
cxd4 1,868 92.7% 50.3% holds up
e6 75 3.7% 32.0% below the line
d6 26 1.3% 36.5% below the line

"Below the line" means the reply scores at least three points worse than the position does overall. Replies played fewer than 25 times are left out: the sample is too small to read.

Is this costing you anything?

A table of averages cannot tell you whether you go wrong here — only your own games can. Opening Leak Lab reads your Chess.com or Lichess archive, finds the decisions you repeat, and checks each one against this book and a bundled Stockfish.

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