Slav Defense: Modern Line
D11 1. d4 d5 2. Nf3 Nf6 3. g3 c6 4. Bg2 Bg4 5. O-O Nbd7 6. c4
Black scores 45.5% here across 1,233 club games — but the 11.8% who answer Bf5 score 38.7%, 7 points worse.
What Black actually plays here
Across 1,233 games from a Lichess-derived book of club play, Black scores 45.5% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| Nf6 | 646 | 52.4% | 46.4% | holds up |
| e6 | 199 | 16.1% | 48.7% | holds up |
| Bf5 | 146 | 11.8% | 38.7% | below the line |
| Bg4 | 127 | 10.3% | 42.1% | below the line |
| dxc4 | 60 | 4.9% | 43.3% | 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.