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Preview of RepCheck

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™
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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.
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Version
1.21.0
Size
53.35 KB
Last updated
16 hours ago (Jul 2, 2026)
Related Categories
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  • Games & Entertainment
License
MIT License
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