Sicilian Defense: Four Knights Variation
B45 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6
White scores 48.8% here across 409 club games — but the 12.5% who answer Bg5 score 44.1%, 5 points worse.
What White actually plays here
Across 409 games from a Lichess-derived book of club play, White scores 48.8% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | White scores | Verdict |
|---|---|---|---|---|
| Be3 | 120 | 29.3% | 51.7% | holds up |
| Nxc6 | 83 | 20.3% | 59.0% | holds up |
| Ndb5 | 52 | 12.7% | 51.9% | holds up |
| Bg5 | 51 | 12.5% | 44.1% | 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.