Grob Opening
A00 1. g4
Black scores 48.2% here across 1,520 club games — but the 7.0% who answer c5 score 37.7%, 10 points worse.
What Black actually plays here
Across 1,520 games from a Lichess-derived book of club play, Black scores 48.2% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| d5 | 556 | 36.6% | 46.6% | holds up |
| e5 | 410 | 27.0% | 53.2% | holds up |
| c5 | 106 | 7.0% | 37.7% | below the line |
| e6 | 98 | 6.4% | 48.0% | holds up |
| g6 | 67 | 4.4% | 45.5% | holds up |
| c6 | 61 | 4.0% | 50.0% | holds up |
| d6 | 61 | 4.0% | 52.5% | holds up |
| Nc6 | 43 | 2.8% | 43.0% | below the line |
| b6 | 34 | 2.2% | 50.0% | holds up |
| Nf6 | 25 | 1.6% | 48.0% | 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.