Opening Leak Lab

Four Knights Game: Italian Variation

C47 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3

Black scores 47.6% here across 924 club games — but the 7.5% who answer d6 score 27.5%, 20 points worse.

What Black actually plays here

Across 924 games from a Lichess-derived book of club play, Black scores 47.6% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Bc5 289 31.3% 50.3% holds up
h6 137 14.8% 47.1% holds up
Be7 132 14.3% 48.1% holds up
Bb4 123 13.3% 49.2% holds up
Nxe4 110 11.9% 59.1% holds up
d6 69 7.5% 27.5% 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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