ChessAutoplay is a Firefox extension for chess.com that bundles a local Stockfish engine to calculate optimal moves and play them on the board. It provides configurable analysis depth and think time, promotion handling, game-over detection, and a hideable control panel.
In the Browser DevTools & extensions space, ChessAutoplay takes a focused approach. It focuses on analyzing and playing optimal chess.com moves automatically without manually calculating each position. It is built as a consumer product for chess.com players seeking automated Stockfish analysis and move execution. ChessAutoplay is free to use. It ships for the web and embeddable surfaces.
It is developed by Firlin, and it first shipped in 2026. Key capabilities include move analysis, automatic move execution, and configurable depth. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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