Indian Defense: Accelerated London System
A45 1. d4 Nf6 2. Bf4
Black scores 49.4% here across 3,973 club games — but the 20.0% who answer e6 score 46.2%, 3 points worse.
What Black actually plays here
Across 3,973 games from a Lichess-derived book of club play, Black scores 49.4% in this position. These are the replies people choose, and how each one works out.
| Reply | Games | Share | Black scores | Verdict |
|---|---|---|---|---|
| g6 | 978 | 24.6% | 52.8% | holds up |
| d5 | 933 | 23.5% | 46.8% | holds up |
| e6 | 796 | 20.0% | 46.2% | below the line |
| d6 | 596 | 15.0% | 47.4% | holds up |
| c5 | 365 | 9.2% | 58.8% | holds up |
| Nc6 | 80 | 2.0% | 40.0% | below the line |
| c6 | 79 | 2.0% | 50.0% | holds up |
| b6 | 58 | 1.5% | 57.8% | holds up |
| Nd5 | 33 | 0.8% | 51.5% | 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.