Notice first
Pressure, defenders, tactical risks, and legal destinations become easier to scan.
A learning overlay for Chess.com
Turn every move into a learning moment.
See candidate moves, tactical risk, pressure, and opening ideas in the position where you are already studying. Feedback stays close to the board, so understanding can follow naturally.
Supports Chess.com onlyDesigned for analysis, puzzles, bots, lessons, and permitted practice.
Why it helps
Short feedback loops make patterns easier to remember.
Chess improves when a move, its consequence, and the reason are connected while the position is still fresh. Chess Overlay keeps those moments together.
Compare before moving
Candidate squares are evaluated side by side, helping you build a repeatable thinking process.
Understand the consequence
Explanations and principal variations show why a move is safe, inaccurate, or costly.
Core features
Useful information, only when the board needs it.
Legal move clarity
Distinguish normal moves, captures, castling, promotion, and en passant without visual clutter.
Attack and defense counts
See how many pieces attack or defend a square, including practical battery and X-ray relationships.
Tactical risk
Spot hanging pieces, pins, forks, overloaded defenders, and hidden lines before they become losses.
Stockfish move evaluation
Compare legal destinations with concise markers and hover explanations based on Stockfish analysis.
Opening guidance
Follow representative choices and ideas, then get one clear response when theory is left.
Local-first engine
Use browser WASM or an optional Windows native Stockfish connection for private analysis.
Chess.com only
Built for learning, not unfair play.
Use it on analysis boards, puzzles, bots, lessons, and personal practice. You are responsible for any use in rated, tournament, or other games that prohibit outside assistance.
Get started
Three steps, then return to the board.
Install once, sign in with Google, and open a supported Chess.com page.
View installation guide- 1
Install the extension
Add Chess Overlay from the Chrome Web Store or follow the manual installation guide.
- 2
Continue with Google
Your account, plan, and remaining access time are shared with the extension and this website.
- 3
Open Chess.com
Use analysis, puzzles, bots, lessons, or practice pages and choose the feedback you need.
Frequently asked questions
Which chess sites are supported?+
Chess Overlay currently supports Chess.com only. Lichess is not supported.
Can Chess.com detect it?+
Detection cannot be guaranteed. Using outside tools during rated games may violate Chess.com’s terms. We recommend using Chess Overlay only for learning, analysis, puzzles, bots, lessons, and unrated casual games.
Does it play moves for me?+
No. It explains and visualizes the position. You remain responsible for choosing every move.
Will I become dependent on this product?+
No. Chess Overlay is designed as a learning tool, not a shortcut. Each suggestion includes a reason and an expected line, helping you understand recurring patterns and gradually compare candidate moves on your own.
Learn from the position in front of you.
Keep the board familiar and bring the explanation closer.