Rapport-Jobava System
D01 1. d4 d5 2. Nc3 Nf6 3. Bf4 g6
Black scores 36.4% here across 461 club games — but the 17.8% who answer Nc6 score 26.2%, 10 points worse.
What Black actually plays here
Across 461 games from a Lichess-derived book of club play, Black scores 36.4% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| e6 | 125 | 27.1% | 45.2% | holds up |
| Nc6 | 82 | 17.8% | 26.2% | below the line |
| Bf5 | 75 | 16.3% | 38.7% | holds up |
| a6 | 75 | 16.3% | 34.0% | holds up |
| c6 | 45 | 9.8% | 33.3% | 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.