Opening Leak Lab

Ruy Lopez

C60 1. e4 e5 2. Nf3 Nc6 3. Bb5

Black scores 45.6% here across 6,197 club games — but the 12.7% who answer Nf6 score 42.3%, 3 points worse.

What Black actually plays here

Across 6,197 games from a Lichess-derived book of club play, Black scores 45.6% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
a6 1,665 26.9% 50.4% holds up
d6 1,658 26.8% 42.8% holds up
Nf6 790 12.7% 42.3% below the line
Bc5 680 11.0% 47.9% holds up
Nge7 522 8.4% 41.5% below the line
Nd4 341 5.5% 45.9% holds up
Qf6 192 3.1% 44.3% holds up
Bd6 139 2.2% 42.4% below the line
f5 92 1.5% 59.2% holds up
f6 46 0.7% 41.3% 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.

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