Sicilian Defense: McDonnell Attack
B21 1. e4 c5 2. f4
Black scores 51.9% here across 983 club games — but the 14.2% who answer e6 score 48.6%, 3 points worse.
What Black actually plays here
Across 983 games from a Lichess-derived book of club play, Black scores 51.9% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| Nc6 | 467 | 47.5% | 53.4% | holds up |
| d6 | 204 | 20.8% | 49.0% | holds up |
| e6 | 140 | 14.2% | 48.6% | below the line |
| d5 | 81 | 8.2% | 51.2% | holds up |
| g6 | 27 | 2.7% | 59.3% | 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.