Find Where You Went Wrong
Automatically compare your games against your repertoire to find deviations. Turn every game into a learning opportunity.
100%
Automatic detection
🎯
Pinpoint accuracy
📈
Continuous improvement
∞
Unlimited games
The Problem with Opening Mistakes
You study an opening, play it in a game, and somewhere around move 8 you play a move you've never analyzed. Sound familiar? Most players don't even realize when they leave their preparation.
The Hidden Cost
Every undetected deviation is a missed learning opportunity. Without analysis, you'll keep making the same mistakes in your opening preparation.
Automatic Deviation Detection
ChessAtlas compares your played games against your repertoire and highlights exactly where you deviated:
Game Import
Connect your Lichess or Chess.com account to automatically import your games.
Deviation Highlighting
See exactly which move left your preparation, highlighted on the board.
Repertoire Gaps
Discover positions your repertoire doesn't cover. Know what lines to add.
Opponent Novelties
Track new moves your opponents play so you can prepare for them.
Performance Trends
See which openings are improving and which need more work based on your results.
Deviation History
Review all your past deviations to identify recurring patterns and fix them.
Continuous Improvement Cycle
Play your games on Lichess or Chess.com
Import games to ChessAtlas
Review deviations and analyze mistakes
Add missing lines to your repertoire
Train the new variations with spaced repetition
Explore Related Features
Start Finding Your Deviations
Connect your account and see where your opening preparation needs work.