Zukertort Opening: Sicilian Invitation
A04 1. Nf3 c5
White scores 52.3% here across 1,335 club games — but the 17.7% who answer e4 score 48.3%, 4 points worse.
What White actually plays here
Across 1,335 games from a Lichess-derived book of club play, White scores 52.3% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | White scores | Verdict |
|---|---|---|---|---|
| g3 | 338 | 25.3% | 55.0% | holds up |
| c4 | 243 | 18.2% | 51.4% | holds up |
| e4 | 236 | 17.7% | 48.3% | below the line |
| d4 | 142 | 10.6% | 53.5% | holds up |
| e3 | 100 | 7.5% | 47.0% | below the line |
| d3 | 67 | 5.0% | 51.5% | holds up |
| b3 | 64 | 4.8% | 50.8% | holds up |
| Nc3 | 61 | 4.6% | 60.7% | holds up |
| c3 | 55 | 4.1% | 50.9% | 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.