bitbytelabs/Bit ↗
Created Feb 16, 2026 · View the bitbytelabs/Bit repository page
Advanced Chess Assistance System for Chess.com, Lichess.org, Pychess.org and more. Hassle-free 1-click install, no downloading. All devices and browsers supported. Updated 24/7.
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Contributors
11
Lines of Code
284,196
From
Jul 8, 2023
To
Feb 16, 2026
About bitbytelabs/Bit
Bit is an open-source chess assistance system designed as a userscript that runs directly in your browser without any downloads required. It provides move suggestions powered by WebAssembly chess engines and works across multiple popular chess platforms including Chess.com, Lichess.org, Pychess.org, and others. The project emphasizes accessibility with a one-click installation process that functions on all devices and browsers, along with support for over 30 languages.
The system operates through a two-part architecture consisting of a userscript that integrates with chess websites and a separate GUI tab that hosts the actual chess engine calculations. Users can see move suggestions displayed directly on the board, customize arrow markings, and access support for chess variants. The project includes multiple engine options built on WebAssembly technology, including Stockfish, Fairy Stockfish, ZeroFish, and Maia-Chess, with regular updates happening automatically. Notable features include the absence of ads or tracking and transparent warnings about the ethical and legal implications of using the tool against other players in competitive settings.
The project is still in active development and acknowledges that bugs exist, particularly with chess variants. The developers explicitly caution users that employing Bit on tournament or online platform sites may violate terms of service and result in bans, placing responsibility on users to employ the tool ethically in controlled environments rather than against real opponents.