Horwitz Defense
A40 1. d4 e6
White scores 55.5% here across 4,662 club games — but the 18.3% who answer e4 score 50.3%, 5 points worse.
What White actually plays here
Across 4,662 games from a Lichess-derived book of club play, White scores 55.5% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | White scores | Verdict |
|---|---|---|---|---|
| c4 | 1,752 | 37.6% | 58.5% | holds up |
| e4 | 855 | 18.3% | 50.3% | below the line |
| Nf3 | 672 | 14.4% | 54.7% | holds up |
| e3 | 351 | 7.5% | 57.3% | holds up |
| a3 | 300 | 6.4% | 67.5% | holds up |
| Bf4 | 171 | 3.7% | 43.0% | below the line |
| Nc3 | 132 | 2.8% | 63.6% | holds up |
| h3 | 123 | 2.6% | 46.7% | below the line |
| c3 | 103 | 2.2% | 42.2% | below the line |
| f4 | 90 | 1.9% | 68.3% | holds up |
| g3 | 52 | 1.1% | 38.5% | 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.