Opening Leak Lab

Old Indian Defense

A41 1. d4 d6 2. c4

Black scores 48.5% here across 1,295 club games — but the 8.3% who answer e6 score 44.4%, 4 points worse.

What Black actually plays here

Across 1,295 games from a Lichess-derived book of club play, Black scores 48.5% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Nf6 454 35.1% 46.9% holds up
e5 170 13.1% 48.5% holds up
g6 165 12.7% 51.8% holds up
c6 148 11.4% 50.0% holds up
e6 107 8.3% 44.4% below the line
Nd7 87 6.7% 52.9% holds up
c5 26 2.0% 53.8% holds up
f6 25 1.9% 42.0% 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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