Opening Leak Lab

English Opening: Symmetrical Variation

A30 1. c4 c5 2. Nf3

White scores 55.8% here across 1,553 club games — but the 2.6% who answer d3 score 43.9%, 12 points worse.

What White actually plays here

Across 1,553 games from a Lichess-derived book of club play, White scores 55.8% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
Nc3 857 55.2% 55.2% holds up
g3 245 15.8% 55.5% holds up
Nf3 157 10.1% 59.9% holds up
e3 132 8.5% 61.4% holds up
d4 45 2.9% 54.4% holds up
d3 41 2.6% 43.9% below the line
e4 37 2.4% 56.8% holds up
b3 29 1.9% 51.7% 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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