RepCheck tekijä patrik

RepCheck analyzes your chess.com and lichess.org games against your
opening repertoire in real time, highlighting exactly where you went
off-book — directly in the analysis view.

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FEATURES
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• Deviation detection: The first move outside your repertoire is
highlighted in the move list.
• Gap display: Moves not yet covered in your repertoire are marked
separately.
• Chessable link: One-click search on Chessable for the deviation move.
• Supported platforms: chess.com/analysis, chess.com/game/review,
lichess.org/analysis.

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REPERTOIRE SOURCES
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1. Local PGN folder — pick a folder of PGN files via the browser dialog.
   No upload, no cloud, everything stays on your device.
2. PGN paste — paste your repertoire directly into the settings panel.
3. RookHub (optional) — connect your own RookHub instance as a backend.
   Analysis runs server-side; the extension only sends the move list and
   receives annotations in return.

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PRIVACY
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• No telemetry, no analytics, no third-party servers.
• In local mode, no data leaves your browser.
• In RookHub mode, the extension communicates exclusively with your own
self-hosted RookHub instance at the URL you provide.

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SETUP
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1. Open chess.com or lichess.org and navigate to a game analysis page.
2. The RepCheck banner appears automatically — click ⚙ to open settings.
3. Enter your RookHub URL and token and click "Connect" — or select a
   local PGN folder.

Source code: https://github.com/kahalm/repcheck