Opening Leak Lab

Vienna Game: Vienna Gambit

C29 1. e4 e5 2. Nc3 Nf6 3. f4

Black scores 42.4% here across 1,002 club games — but the 34.5% who answer exf4 score 37.3%, 5 points worse.

What Black actually plays here

Across 1,002 games from a Lichess-derived book of club play, Black scores 42.4% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
exf4 346 34.5% 37.3% below the line
d5 210 21.0% 46.9% holds up
d6 191 19.1% 45.0% holds up
Nc6 154 15.4% 43.8% holds up
Bb4 57 5.7% 45.6% 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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