Opening Leak Lab

English Opening: Symmetrical Variation, Normal Variation

A34 1. c4 c5 2. Nc3

Black scores 44.9% here across 850 club games — but the 3.3% who answer b6 score 33.9%, 11 points worse.

What Black actually plays here

Across 850 games from a Lichess-derived book of club play, Black scores 44.9% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Nc6 458 53.9% 45.2% holds up
Nf6 103 12.1% 42.7% holds up
d6 84 9.9% 46.4% holds up
e6 82 9.6% 42.1% holds up
g6 58 6.8% 53.4% holds up
b6 28 3.3% 33.9% below the line
e5 26 3.1% 46.2% 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.

Analyse my games