Tampermonkey Chess Script [portable]
Tampermonkey chess scripts are powerful JavaScript-based tools that allow players to customize their experience on platforms like Chess.com and Lichess.org. Managed through the Tampermonkey browser extension, these "userscripts" can range from harmless visual tweaks to controversial automated engine assistants. Popular Types of Chess Scripts
- Install Tampermonkey (Chrome/Edge/Firefox).
- Create a new script and paste the code below.
- Edit the CONFIG section to match your preferred site(s) and analysis URL.
- Save and enable the script; refresh the chess page.
function addStyles()
const css = `
.tm-last-move outline: 3px solid rgba(255,180,0,0.9); border-radius:6px;
.tm-legal-move box-shadow: inset 0 0 0 3px rgba(0,200,120,0.18);
.tm-timer-bar position: absolute; left:0; bottom:0; height:4px; background:#ff6b6b; transition:width 0.1s linear; z-index:9999;
.tm-analysis-btn position: absolute; top:8px; right:8px; padding:6px 8px; background:#222; color:#fff; border-radius:4px; font-size:13px; cursor:pointer; z-index:9999; opacity:0.9;
.tm-analysis-btn:hover opacity:1;
`;
const s = document.createElement('style');
s.textContent = css;
document.head.appendChild(s);
));