Scripts that give a competitive advantage, such as engine assistance ("engine-assisted" move suggestions), automatic move suggestions, or in-game analysis, are strictly prohibited. Using these will lead to a permanent ban on Chess.com and Lichess.org.
Install the Tampermonkey extension from your browser's extension store.
flag ensures your custom image overrides the site's default sprite. Dynamic Links : To use your own images, simply replace the customPieceURL with a direct link to any PNG or SVG file. How to Install Tampermonkey Dashboard in your browser. "Create a new script" Paste the code above and press Navigate to a game on to see the generated piece in action. for pieces each time you load a game?
The most searched and controversial scripts fall into the category—specifically those that turn your browser into an undetectable chess engine. tampermonkey chess script
function highlightLegalMoves(board) // naive: when user clicks a piece square, highlight possible target squares if present board.addEventListener('click', (e) => const sq = e.target.closest('[data-square], .square'); if (!sq) return; // remove old board.querySelectorAll('.tm-legal-move').forEach(x => x.classList.remove('tm-legal-move')); // find legal target squares (site-specific classes) const targets = document.querySelectorAll('.legal-move, .target'); targets.forEach(t => t.classList.add('tm-legal-move')); , true);
This is why you should . The official repository, GreasyFork, provides a commenting and rating system that can help you gauge a script's reputation. Avoid scripts that are new, have few reviews, or request overly broad permissions (e.g., access to all websites rather than just chess.com ). For example, a safe and legitimate script will typically have a @grant none tag in its metadata, indicating it does not request any additional special permissions.
According to updates from the Chess.com Fair Play Team, their detection strategy has evolved into a powerful combination of methods: Scripts that give a competitive advantage, such as
Advanced scripts can simulate mouse clicks or keyboard inputs to move pieces automatically. Legitimate Uses: Enhancing the Chess Experience
In the chess world, this ability to inject code and automate actions is both the script's greatest strength and its most controversial feature.
Whether you are a developer looking to automate tasks or a player curious about the technology behind "browser cheats," here is a deep dive into the world of Tampermonkey chess scripts. flag ensures your custom image overrides the site's
Some scripts provide visual hints, such as highlighting legal moves or showing the best move from an engine perspective. Examples include various "chess helpers" often found on GitHub. ⚠️ Important: Legality, Cheating, and Risks
This provides actual value/structure for someone looking to code their own.
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