Indian Defense: London System
A46 1. d4 Nf6 2. Nf3 e6 3. Bf4
Black scores 45.7% here across 467 club games — but the 23.1% who answer c5 score 42.6%, 3 points worse.
What Black actually plays here
Across 467 games from a Lichess-derived book of club play, Black scores 45.7% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| d5 | 186 | 39.8% | 48.7% | holds up |
| c5 | 108 | 23.1% | 42.6% | below the line |
| b6 | 54 | 11.6% | 37.0% | below the line |
| Be7 | 35 | 7.5% | 51.4% | holds up |
| d6 | 32 | 6.9% | 48.4% | 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.