A properly structured Tampermonkey chess script requires specific metadata for compatibility, efficient DOM manipulation to avoid breaking the chess site's functionality, and safe handling of game data.
Install Tampermonkey: Grab the extension for Chrome, Firefox, or Edge. Find a Script: Search sites like Greasy Fork or GitHub.
Platform Policies
| Platform | Stance on Scripts |
|----------|-------------------|
| Chess.com | Strictly prohibits any use of external assistance during games. Automated scripts lead to permanent bans and rating reset. |
| Lichess.org | Bans engine use during play. Allows API bots if clearly marked as BOT. Tampermonkey scripts evading detection are illegal. |
| Chess24 (now merged) | Similar to Chess.com – any automation is a violation of TOS. |
// Wait for page load
if (document.readyState === 'loading')
document.addEventListener('DOMContentLoaded', init);
else init();
The Cat-and-Mouse Game: Detection
Chess platforms invest heavily in anti-cheat systems (like Chess.com’s "Fair Play" algorithms or Lichess’s "Irwin"). They fight userscripts in several ways:
Before you start, ensure you have Tampermonkey installed in your browser. Then, you can create a new script by clicking on the Tampermonkey icon in your browser toolbar, selecting "Create a new script," and then pasting the following code into the editor:
Tampermonkey Chess Script [work] May 2026
A properly structured Tampermonkey chess script requires specific metadata for compatibility, efficient DOM manipulation to avoid breaking the chess site's functionality, and safe handling of game data.
Install Tampermonkey: Grab the extension for Chrome, Firefox, or Edge. Find a Script: Search sites like Greasy Fork or GitHub. tampermonkey chess script
Platform Policies
| Platform | Stance on Scripts |
|----------|-------------------|
| Chess.com | Strictly prohibits any use of external assistance during games. Automated scripts lead to permanent bans and rating reset. |
| Lichess.org | Bans engine use during play. Allows API bots if clearly marked as BOT. Tampermonkey scripts evading detection are illegal. |
| Chess24 (now merged) | Similar to Chess.com – any automation is a violation of TOS. | Platform Policies | Platform | Stance on Scripts
// Wait for page load
if (document.readyState === 'loading')
document.addEventListener('DOMContentLoaded', init);
else init();
The Cat-and-Mouse Game: Detection
Chess platforms invest heavily in anti-cheat systems (like Chess.com’s "Fair Play" algorithms or Lichess’s "Irwin"). They fight userscripts in several ways: Allows API bots if clearly marked as BOT
Before you start, ensure you have Tampermonkey installed in your browser. Then, you can create a new script by clicking on the Tampermonkey icon in your browser toolbar, selecting "Create a new script," and then pasting the following code into the editor: