Blackmar-Diemer Gambit
D00 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6
Black scores 47.9% here across 2,474 club games — but the 3.9% who answer Nc6 score 43.8%, 4 points worse.
What Black actually plays here
Across 2,474 games from a Lichess-derived book of club play, Black scores 47.9% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| dxe4 | 1,668 | 67.4% | 48.8% | holds up |
| e6 | 257 | 10.4% | 46.7% | holds up |
| c6 | 189 | 7.6% | 47.4% | holds up |
| Nf6 | 143 | 5.8% | 47.2% | holds up |
| Nc6 | 96 | 3.9% | 43.8% | below the line |
| c5 | 55 | 2.2% | 49.1% | holds up |
| e5 | 54 | 2.2% | 38.0% | 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.