Chess Overlay

Shows legal moves, tactical risks, openings, and Stockfish analysis directly on the chessboard.

Chess Overlay turns the Chess.com board into a visual learning workspace. Explore candidate moves, hidden threats, opening ideas, and engine lines without leaving the board. - WHAT YOU CAN SEE • Legal moves and captures • Attack and defense counts • Tactical risks and vulnerable pieces • Pre-move candidate evaluations • Post-move grades, including Best, Excellent, Good, Inaccuracy, Mistake, and Blunder • Opening choices and numbered principal variations • Stockfish 18 and Lc0 engine analysis LEARN DIRECTLY ON THE BOARD Chess Overlay places visual feedback on the board you already know. Compare candidate moves before playing, review the result afterward, and follow important engine lines with numbered arrows. The extension never moves pieces or submits moves for you. You remain in control of every decision. - REQUIREMENTS • Google Chrome • Windows 10 or 11, 64-bit • Chess Overlay Windows engine package - RESPONSIBLE USE Chess Overlay is designed for analysis, puzzles, bots, lessons, and permitted practice. Always review and follow Chess.com’s current Fair Play Policy and the rules of any game or event you participate in.