Opening Leak Lab

Nimzowitsch Defense: Kennedy Variation, Linksspringer Variation

B00 1. e4 Nc6 2. d4 e5 3. d5

Black scores 48.7% here across 1,010 club games — but the 20.3% who answer Nd4 score 38.8%, 10 points worse.

What Black actually plays here

Across 1,010 games from a Lichess-derived book of club play, Black scores 48.7% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Nce7 633 62.7% 53.2% holds up
Nd4 205 20.3% 38.8% below the line
Nb8 100 9.9% 46.0% holds up
Nb4 54 5.3% 46.3% 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.

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