RepCheck by patrik
In the analysis board on chess.com & lichess: highlights where your game left your opening repertoire. RookHub sync + FEN tools.
Available on Firefox for Android™Available on Firefox for Android™
Extension Metadata
About this extension
RepCheck shows you where your games leave your opening repertoire — in the analysis board on chess.com and lichess.⚠️ Works in the analysis / game-review board only. Open a finished game or the analysis board and run the check there — RepCheck does not run during a live, ongoing game.Features
- Highlights the first out-of-repertoire move and transpositions directly in the move list.
- Use a repertoire from a local PGN (pick a folder or paste) or from a RookHub instance (server-side analysis).
- Save games to RookHub (with a shareable link) and copy the PGN with one click.
- On chessable.com: copy or search the FEN of the current position and remember a line to RookHub.Privacy: data is only sent to the RookHub instance you configure yourself — nowhere else.
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Permissions and data
Required permissions:
- Access your data for www.chess.com
- Access your data for lichess.org
- Access your data for www.chessable.com
- Access your data for chessable.com
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.14.6
- Size
- 50.73 KB
- Last updated
- 2 days ago (Jun 19, 2026)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
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