English Opening
A10 1. c4
Black scores 48.8% here across 3,717 club games — but the 6.3% who answer d5 score 44.2%, 5 points worse.
What Black actually plays here
Across 3,717 games from a Lichess-derived book of club play, Black scores 48.8% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| e5 | 1,429 | 38.4% | 46.7% | holds up |
| Nf6 | 601 | 16.2% | 52.9% | holds up |
| c5 | 458 | 12.3% | 52.2% | holds up |
| e6 | 346 | 9.3% | 53.2% | holds up |
| d5 | 234 | 6.3% | 44.2% | below the line |
| g6 | 195 | 5.2% | 50.0% | holds up |
| c6 | 147 | 4.0% | 42.5% | below the line |
| d6 | 89 | 2.4% | 47.2% | holds up |
| b6 | 74 | 2.0% | 51.4% | holds up |
| f5 | 61 | 1.6% | 50.8% | holds up |
| Nc6 | 46 | 1.2% | 37.0% | 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.