Sicilian Defense: Old Sicilian
B30 1. e4 c5 2. Nf3 Nc6
White scores 49.8% here across 4,452 club games — but the 15.9% who answer Bc4 score 46.7%, 3 points worse.
What White actually plays here
Across 4,452 games from a Lichess-derived book of club play, White scores 49.8% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | White scores | Verdict |
|---|---|---|---|---|
| d4 | 2,022 | 45.4% | 50.9% | holds up |
| Bc4 | 708 | 15.9% | 46.7% | below the line |
| Bb5 | 680 | 15.3% | 51.8% | holds up |
| Nc3 | 377 | 8.5% | 43.8% | below the line |
| c3 | 332 | 7.5% | 52.6% | holds up |
| c4 | 95 | 2.1% | 56.3% | holds up |
| d3 | 53 | 1.2% | 45.3% | below the line |
| b3 | 51 | 1.1% | 48.0% | holds up |
| g3 | 46 | 1.0% | 50.0% | holds up |
| Be2 | 30 | 0.7% | 46.7% | 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.