Tampermonkey Chess Script -

If you are considering using a Tampermonkey script to boost your rating, you should be aware of the consequences.

As of 2026, the chess platform arms race has intensified:

The days of simple Tampermonkey auto-players succeeding for more than a handful of games are over. Platform engineers are former competitive programmers who understand script injection patterns intimately.

That said, script developers continue to evolve—adding randomness, human-like error rates, and mouse movement simulation. It’s a cat-and-mouse game that ultimately harms the entire chess community.

If you want to improve at chess or experiment with automation ethically, consider these alternatives:

| Need | Solution | |------|----------| | Real-time analysis without cheating | Use a second device: set up an analysis board manually as you play. This is slow but legal. | | Play against an engine | Use Lichess’s built-in AI (Level 1-8) or Chess.com’s bots. | | Automated post-game analysis | Lichess provides free, instant Stockfish analysis after every game. | | Custom chess bot | Create a Lichess BOT account with official API and Bearer token. No Tampermonkey needed. | | Training tools | Use Chessable, Chesstempo, or Aimchess for guided improvement. |

This provides actual value/structure for someone looking to code their own.

Title: [Tutorial] How to write your first Tampermonkey Script for Chess

Ever wanted to customize your chess experience? Here is the skeleton of a Tampermonkey script that highlights the center squares on any chess board. tampermonkey chess script

Step 1: The Metadata You need to define where the script runs.

// ==UserScript==
// @name         Center Squares Highlighter
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Highlights e4, d4, e5, d5
// @match        *://*.chess.com/*
// @grant        none
// ==/UserScript==

Step 2: The Injection We need a function that waits for the board to load before running.

(function() 
    'use strict';
// Simple helper to wait for an element
const waitForElement = (selector) => 
    return new Promise(resolve => 
        if (document.querySelector(selector)) 
            return resolve(document.querySelector(selector));
const observer = new MutationObserver(() => 
            if (document.querySelector(selector)) 
                resolve(document.querySelector(selector));
                observer.disconnect();
);
        observer.observe(document.body,  childList: true, subtree: true );
    );
;
waitForElement('cg-board').then((board) => 
    console.log("Board found! Injecting overlay...");
    // Add your custom CSS or logic here
    const overlay = document.createElement('div');
    overlay.style.position = 'absolute';
    overlay.style.top = '0';
    overlay.style.left = '0';
    overlay.style.width = '100%';
    overlay.style.height = '100%';
    overlay.style.pointerEvents = 'none'; // Let clicks pass through
    overlay.style.backgroundColor = 'rgba(255, 255, 0, 0.2)'; // Yellow tint
    board.appendChild(overlay);
);

)();

Step 3: Play! Save this in Tampermonkey, reload the page, and watch the board light up. From here, you can expand by adding chess.js logic to calculate moves.

Happy coding! ♟️👨‍💻

Note on Policy: If you are posting about this, be aware that chess platforms (like Chess.com and Lichess) have strict Terms of Service. Using scripts that provide engine assistance in rated games can lead to account bans. It is best to frame your post around educational development and analysis modes rather than competitive advantage.

Tampermonkey is a browser extension that lets you run "userscripts" to modify how websites like Chess.com and Lichess.org look and behave. Using scripts for things like UI themes, board coordinates, or analysis tools is generally safe, but using them for "assistance" during a live game will get you permanently banned.В  1. Setup the EnvironmentВ  If you are considering using a Tampermonkey script

Before you can run any chess scripts, you need the "manager."В 

Install Tampermonkey: Download it from the Chrome Web Store or Firefox Add-ons.

Enable Developer Mode: In Chrome-based browsers, go to chrome://extensions and toggle Developer Mode (top right) to "On." This is often required for modern scripts to execute.В  2. Finding Chess ScriptsВ 

Most users find scripts on community repositories rather than writing them from scratch.В 

Greasy Fork: The primary hub for userscripts. You can find everything from custom piece sets to advanced UI tweaks.

GitHub: Developers often host scripts here. Popular projects include the Advanced Chess Assistance System (A.C.A.S) and UI-only mods like Chess Helper.В  3. How to Install a ScriptВ  Once you find a script you like:В 

Click "Install" on the Greasy Fork page. Tampermonkey will open a new tab showing the code.

Confirm Installation: Click the Install button again within the Tampermonkey tab. The days of simple Tampermonkey auto-players succeeding for

Verify: Click the Tampermonkey icon in your browser toolbar to ensure the script is listed and toggled to Enabled.

Refresh: You must refresh your chess site tab for the script to take effect.В  4. Common Script TypesВ  TypeВ  Risk Level UI Themes Changes board colors or piece styles. Safe Game Review Adds "Brilliant" or "Best Move" icons to your past games. Safe Opening Books Loads specific lines into your analysis board. Safe Cheats/Bots Finds the "best move" during live play. BANNABLE вљ пёЏ Important Warning: Fair PlayВ 

Chess sites use advanced algorithms to detect moves that match engine recommendations too closely.В  How to use Tampermonkey (Simple Tutorial 2024)

This is punchy, uses emojis, and gets straight to the point.

Post: рџ› пёЏ Playing with Tampermonkey & Chess.com

Just finished a deep dive into userscripts! I wrote a simple Tampermonkey script to visualize engine lines directly on the board.

It’s wild how much control you have over a webpage once you inject a script. ✅ DOM manipulation ✅ External library injection ✅ Real-time UI overlay

⚠️ Disclaimer: I built this strictly for educational purposes to understand how browser extensions interact with complex web apps. I do not condone using scripts to cheat in rated games—play fair!

#WebDev #JavaScript #Chess #Tampermonkey #Coding