Opening Leak Lab

French Defense: Two Knights Variation

C00 1. e4 e6 2. Nf3 d5 3. Nc3

Black scores 49.5% here across 574 club games — but the 13.8% who answer c5 score 41.8%, 8 points worse.

What Black actually plays here

Across 574 games from a Lichess-derived book of club play, Black scores 49.5% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
d4 155 27.0% 46.8% holds up
dxe4 149 26.0% 50.7% holds up
Nf6 132 23.0% 56.1% holds up
c5 79 13.8% 41.8% below the line
Bb4 28 4.9% 41.1% 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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