Opening Leak Lab

English Opening: Carls-Bremen System

A22 1. c4 e5 2. Nc3 Nf6 3. g3

Black scores 47.6% here across 433 club games — but the 12.7% who answer c6 score 39.1%, 8 points worse.

What Black actually plays here

Across 433 games from a Lichess-derived book of club play, Black scores 47.6% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Bc5 89 20.6% 50.0% holds up
d5 87 20.1% 44.8% holds up
Nc6 75 17.3% 51.3% holds up
Bb4 75 17.3% 50.7% holds up
c6 55 12.7% 39.1% 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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