Opening Leak Lab

Nimzowitsch Defense: Kennedy Variation

B00 1. e4 Nc6 2. d4 e5

White scores 50.3% here across 532 club games, and no common reply does noticeably worse than the rest.

What White actually plays here

Across 532 games from a Lichess-derived book of club play, White scores 50.3% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
d5 340 63.9% 47.8% holds up
Nf3 114 21.4% 57.0% holds up
dxe5 61 11.5% 59.0% 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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