French Defense: La Bourdonnais Variation
C00 1. e4 e6 2. f4
Black scores 50.8% here across 530 club games — but the 8.5% who answer d6 score 45.6%, 5 points worse.
What Black actually plays here
Across 530 games from a Lichess-derived book of club play, Black scores 50.8% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| d5 | 288 | 54.3% | 57.5% | holds up |
| d6 | 45 | 8.5% | 45.6% | below the line |
| c5 | 45 | 8.5% | 54.4% | holds up |
| b6 | 32 | 6.0% | 20.3% | 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.