Opening Leak Lab

Sicilian Defense: French Variation

B40 1. e4 c5 2. Nf3 e6

White scores 50.0% here across 1,511 club games — but the 14.5% who answer Bc4 score 45.9%, 4 points worse.

What White actually plays here

Across 1,511 games from a Lichess-derived book of club play, White scores 50.0% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
d4 697 46.1% 50.7% holds up
Bc4 219 14.5% 45.9% below the line
Nc3 196 13.0% 46.9% below the line
c3 117 7.7% 53.0% holds up
c4 69 4.6% 50.0% holds up
d3 56 3.7% 53.6% holds up
e5 33 2.2% 60.6% holds up
g3 25 1.7% 56.0% holds up

"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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