Queen's Pawn Game: Accelerated London System
D00 1. d4 d5 2. Bf4
Black scores 51.2% here across 1,012 club games — but the 23.4% who answer Nc6 score 43.5%, 8 points worse.
What Black actually plays here
Across 1,012 games from a Lichess-derived book of club play, Black scores 51.2% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| Nf6 | 257 | 25.4% | 50.6% | holds up |
| e6 | 245 | 24.2% | 56.5% | holds up |
| Nc6 | 237 | 23.4% | 43.5% | below the line |
| Bf5 | 120 | 11.9% | 60.4% | holds up |
| c5 | 41 | 4.1% | 54.9% | holds up |
| c6 | 36 | 3.6% | 48.6% | 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.