Opening Leak Lab

Bishop's Opening: Vienna Hybrid

C24 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3

Black scores 48.7% here across 686 club games — but the 21.3% who answer Bb4 score 45.5%, 3 points worse.

What Black actually plays here

Across 686 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
Bc5 292 42.6% 49.3% holds up
Bb4 146 21.3% 45.5% below the line
h6 68 9.9% 54.4% holds up
d6 61 8.9% 46.7% holds up
Be7 54 7.9% 45.4% 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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