Opening Leak Lab

Sicilian Defense: Moscow Variation

B51 1. e4 c5 2. Nf3 d6 3. Bb5+

Black scores 47.1% here across 539 club games, and no common reply does noticeably worse than the rest.

What Black actually plays here

Across 539 games from a Lichess-derived book of club play, Black scores 47.1% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare Black scoresVerdict
Bd7 322 59.7% 46.6% holds up
Nd7 132 24.5% 49.6% holds up
Nc6 85 15.8% 45.3% 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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