Opening Leak Lab

Queen's Pawn Game: Chigorin Variation

A45 1. d4 Nf6 2. Nc3 d5

White scores 52.5% here across 899 club games — but the 28.6% who answer Nf3 score 47.3%, 5 points worse.

What White actually plays here

Across 899 games from a Lichess-derived book of club play, White scores 52.5% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
Bf4 391 43.5% 68.2% holds up
Nf3 257 28.6% 47.3% below the line
Bg5 117 13.0% 39.3% below the line
e3 35 3.9% 28.6% below the line
f3 30 3.3% 18.3% below the line
g3 25 2.8% 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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