Zukertort Opening: Slav Invitation
A04 1. Nf3 c6
White scores 56.0% here across 644 club games — but the 4.2% who answer Nc3 score 37.0%, 19 points worse.
What White actually plays here
Across 644 games from a Lichess-derived book of club play, White scores 56.0% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | White scores | Verdict |
|---|---|---|---|---|
| d4 | 199 | 30.9% | 57.3% | holds up |
| g3 | 154 | 23.9% | 55.8% | holds up |
| e4 | 90 | 14.0% | 55.6% | holds up |
| c4 | 85 | 13.2% | 55.3% | holds up |
| b3 | 28 | 4.3% | 73.2% | holds up |
| Nc3 | 27 | 4.2% | 37.0% | below the line |
| d3 | 26 | 4.0% | 57.7% | 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.