Opening Leak Lab

Queen's Gambit Declined: Ragozin Defense

D38 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4

White scores 53.7% here across 529 club games — but the 10.6% who answer Qa4+ score 49.1%, 5 points worse.

What White actually plays here

Across 529 games from a Lichess-derived book of club play, White scores 53.7% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
Bg5 194 36.7% 60.3% holds up
e3 83 15.7% 52.4% holds up
Qa4+ 56 10.6% 49.1% below the line
Bd2 55 10.4% 52.7% holds up
a3 37 7.0% 47.3% below the line
cxd5 31 5.9% 56.5% 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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