Chess Helper by Branimir Klarić

Chess Helper provides chess hints and analysis on Chess.com and Lichess.org

Some features may require payment

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About this extension

Features:
✓ Show attackers for each square
✓ Highlight losing and winning trades
✓ Preview your next move
✓ Visualize entire attack lines
✓ Calculate evaluation
✓ Suggest best moves

Works on all Chess.com and Lichess.org boards, including live games, bot games, puzzles and more.

Comes with a free 30-day trial. Receive unlimited access for a one-time payment.

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Permissions and data

Required permissions:

Access your data for sites in the chess.com domain
Access your data for sites in the lichess.org domain
Access your data for www.c4355.com
Access your data for www.justdoinghomework.com
Access your data for www.superhardalgebraproblems.com
Access your data for www.schoolschoolschool.com
Access your data for www.pleasedontblockchess.com

Optional permissions:

Access your data for sites in the chess.com domain
Access your data for sites in the lichess.org domain
Access your data for www.c4355.com
Access your data for www.justdoinghomework.com
Access your data for www.superhardalgebraproblems.com
Access your data for www.schoolschoolschool.com
Access your data for www.pleasedontblockchess.com

Data collection:

The developer says this extension doesn't require data collection.

Optional data collection, according to the developer:

Technical and interaction data