Queen's Pawn Game: Colle System
D04 1. d4 d5 2. Nf3 Nf6 3. e3
Black scores 45.4% here across 756 club games — but the 28.7% who answer e6 score 41.7%, 4 points worse.
What Black actually plays here
Across 756 games from a Lichess-derived book of club play, Black scores 45.4% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| e6 | 217 | 28.7% | 41.7% | below the line |
| Bg4 | 155 | 20.5% | 48.1% | holds up |
| Bf5 | 97 | 12.8% | 53.1% | holds up |
| Nc6 | 93 | 12.3% | 41.4% | below the line |
| c6 | 54 | 7.1% | 50.9% | holds up |
| g6 | 50 | 6.6% | 55.0% | holds up |
| c5 | 43 | 5.7% | 44.2% | 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.