Opening Leak Lab

Philidor Defense

C41 1. e4 e5 2. Nf3 d6 3. Bc4 Be7

White scores 58.2% here across 7,305 club games — but the 9.7% who answer Nc3 score 52.3%, 6 points worse.

What White actually plays here

Across 7,305 games from a Lichess-derived book of club play, White scores 58.2% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
Bc4 3,020 41.3% 58.0% holds up
d4 2,295 31.4% 62.0% holds up
Nc3 707 9.7% 52.3% below the line
h3 490 6.7% 56.4% holds up
c3 169 2.3% 57.7% holds up
Bb5+ 158 2.2% 50.9% below the line
d3 157 2.1% 56.4% holds up
Be2 92 1.3% 59.8% holds up
b3 67 0.9% 58.2% holds up
c4 65 0.9% 45.4% below the line
g3 50 0.7% 56.0% 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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