Tampermonkey Chess Script Guide

Tampermonkey chess scripts are powerful tools that allow players to customize and enhance their experience on popular platforms like Chess.com and Lichess. By using the Tampermonkey browser extension, players can run custom JavaScript "userscripts" that modify the functionality and appearance of these websites.

While some scripts are designed for purely aesthetic or utility purposes, others fall into a gray area or are strictly prohibited. Below is a comprehensive look at how these scripts work, what they offer, and the risks involved. What is a Tampermonkey Chess Script?

Tampermonkey is a popular userscript manager available for browsers like Chrome, Firefox, and Safari. A "chess script" is a small program that lives within this manager and executes only when you visit a specific chess site.

These scripts can "see" what is happening on your screen—such as the position of the pieces or the time on the clock—and then interact with the page to change its layout, add new buttons, or even suggest moves. Common Types of Chess Scripts

Userscripts for chess generally fall into three main categories: 1. UI & Visual Customization

These are typically allowed by most platforms as they don't provide a competitive advantage.

Custom Board & Pieces: Change the look of your board or pieces to styles not natively offered by the site.

Move Labels: Add coordinate labels directly onto the squares for better visualization.

Streamer Overlays: Hide your rating or sensitive information while broadcasting to avoid "stream sniping." 2. Workflow & Productivity Tools

These scripts streamline how you study or interact with the site without playing the game for you.

Analysis Integration: Add buttons to quickly export a game from Chess.com to the Lichess Analysis Board.

PGN Utilities: Re-enable right-clicking or text selection on sites that restrict it, making it easier to copy move lists for study.

Advanced Keybinds: Create custom shortcuts to resign, draw, or navigate puzzles faster. 3. Assistance & "Bots" (Strictly Prohibited)

These scripts are highly controversial and will likely result in a permanent ban.

To get started, you need a userscript manager like Tampermonkey (available for Chrome, Firefox, and Edge). Install the extension from your browser's store. Find a script on a site like GreasyFork or GitHub.

Click "Install"; Tampermonkey will automatically detect the code.

Visit the chess site (e.g., Chess.com or Lichess), and the script will run in the background. ♟️ Common Script Categories tampermonkey chess script

Most scripts focus on enhancing the experience or adding utility that the native sites don't provide: UI Customization:

Board Centering: Fixes layouts where the board is offset to one side.

Custom Themes: Replaces standard piece images with custom designs or 8-bit styles.

Spectator Control: Hides user lists or chat windows to reduce distraction during high-stakes games. Analysis Tools:

Dual Bubbles: Allows users to see both the "Move Played" and "Best Move" markers simultaneously in Chess.com reviews.

Engine Integration: Some scripts help export moves directly to a local engine or tutorial engine for deeper study. Utility & Accessibility:

Keyboard Controls: Re-enables keyboard shortcuts for sites that have removed or limited them.

Game Exporters: Simplifies downloading your game history for offline archiving. ⚠️ Important Risks & Ethics

Using scripts can be a double-edged sword, especially on competitive platforms. sayfpack13/chess-analysis-bot - GitHub

The intersection of Tampermonkey and online chess represents a fascinating conflict between user-driven web customization and the rigid integrity required for competitive play. Tampermonkey, a popular browser extension for managing "userscripts," allows players to inject custom JavaScript into websites like Chess.com or Lichess. While these scripts can enhance the user experience through cosmetic changes and interface improvements, they also open a controversial door to automated assistance and cheating. 1. The Utility of Userscripts in Chess

At its best, the "tampermonkey chess script" is a tool for personalization. The online chess community has developed a wide array of scripts designed to improve accessibility and aesthetics:

Custom Themes: Players use scripts to implement unique piece sets or board textures that are not available in the standard site settings.

Enhanced Statistics: Some scripts pull data from a player's history to provide real-time Elo tracking or Win/Loss ratios directly on the dashboard.

Blindfold Training: Userscripts can hide pieces or coordinates to help players practice visualization and mental calculation. 2. The Ethical and Technical Gray Area

The controversy arises when scripts move from cosmetic to functional. Tampermonkey scripts can be used to automate calculations or provide visual cues that give one player an unfair advantage.

Engine Integration: The most notorious scripts link the browser window to a powerful chess engine (like Stockfish), highlighting the "best move" on the screen. Tampermonkey chess scripts are powerful tools that allow

Time Management: Some scripts can automate pre-moves or manage clock settings in ways that circumvent the standard UI constraints.

From a technical standpoint, these scripts are difficult to detect because they run on the client-side (the user's browser) rather than the server. However, major platforms have developed sophisticated behavioral analysis algorithms to identify patterns—such as unnatural move accuracy or consistent time intervals—that suggest a script is in use. 3. The Arms Race: Customization vs. Anti-Cheat

The existence of these scripts has forced a perpetual "arms race" between developers and platforms. On one hand, the open-source nature of userscripts fosters innovation and community-driven features. On the other, it threatens the meritocratic nature of chess.

Websites like Chess.com frequently update their "Document Object Model" (DOM) structure specifically to break existing scripts. This forces script developers to constantly rewrite their code, while simultaneously pushing anti-cheat teams to refine their detection methods. Conclusion

Ultimately, Tampermonkey chess scripts embody the dual-edged sword of web freedom. They provide a canvas for players to build their ideal playing environment, yet they simultaneously challenge the fundamental fairness of the game. As long as chess remains a digital pursuit, the tension between the desire to customize and the need to regulate will continue to define the online experience.

If you tell me which specific features you’re interested in (like UI tweaks or analysis tools), I can help you find or understand the logic behind those scripts.

Here’s a structured guide for creating a Tampermonkey chess script — from understanding what it can do, to writing your first script, and staying within fair play guidelines.

1. Chess.com Board Highlighter

  • Author: Unknown (GreasyFork community)
  • Tier: 2 (Informational)
  • What it does: Highlights legal moves in a unique color and shows the last move made by both players permanently. It also adds a "Move Times" popup showing how long each player spent on each move.
  • Why use it: It removes visual ambiguity. You never accidentally miss a legal knight move again.
  • Detection risk: Low. It does not use an engine; it only visualizes existing game data.

Part 7: The Future – AI-Powered Scripts

We are entering a new era: LLM-powered chess scripts.

Imagine a Tampermonkey script that does not use Stockfish, but uses a local AI model (like GPT-4o-mini or Llama 3) to give natural language advice.

Example: Instead of an arrow, a small text bubble appears: "Your bishop is pinned to the king by the rook. Consider moving the queen to defend."

This is not engine evaluation—it’s positional understanding. Current fair play policies do not explicitly ban natural language advice, but they likely will. The line between "assistance" and "coaching" is blurry.

Common Use Cases

The functionality of these scripts ranges from benign quality-of-life improvements to full-blown cheating tools.

Part 7: Risks of Using Tampermonkey Chess Scripts

Beyond bans and ethical concerns, there are technical risks:

2. Lichess BOT

  • Function: Turns your account into a bot on Lichess (requires explicit bot marking).
  • Legitimate use: Lichess allows API-based bots if marked as BOT account. Tampermonkey scripts often try to bypass this flag—against terms.

8. Final Checklist Before Using

  • [ ] Script only adds visual/UI help (no engine suggestions)
  • [ ] No unauthorized API calls
  • [ ] Does not violate site’s ToS
  • [ ] Works only on your own games (not while observing)
  • [ ] Can be turned off easily

Would you like a ready-to-use script for a specific feature (e.g., last move highlighter, clock display, or PGN exporter) for Chess.com or Lichess?

Tampermonkey scripts for chess are broadly divided into utility scripts (which improve the user interface) and assistance/bot scripts (which use engines to suggest moves) Popular Utility Scripts

These scripts are generally safer to use as they only change visual elements or add convenient links: A.C.A.S (Advanced Chess Assistance System) you would likely:

: A highly-rated script that provides board analysis and move suggestions using a GUI. Chess Plus+

: Adds features like an "Auto Queue" to join new games faster and a "Lichess Analysis" button to quickly export Chess.com games to Lichess. Shadow Chess Pieces

: A cosmetic script that changes the visual style of the chess pieces with a "shadow" effect. Lichess Analysis for Chessgames.com

: Adds a one-click button to analyze historical games from Chessgames.com directly on Lichess. Assistance & "Bot" Scripts

Using scripts that calculate or play moves for you is considered cheating on platforms like Chess.com and Lichess. These accounts are usually banned quickly. US Chess Sales

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:

// ==UserScript==
// @name         Chess Script
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Try to take over the world!
// @author       Your Name
// @match        https://www.chess.com/*
// @grant        none
// ==/UserScript==
(function() 
    'use strict';
    document.body.appendChild(document.createElement('div')).innerHTML = 'Tampermonkey script injected!';
)();

This script does the following:

  • The metadata block (// ==UserScript== to // ==/UserScript==) provides information about the script to Tampermonkey.

    • @name and @namespace help identify the script.
    • @version and @description give version information and a brief description.
    • @author specifies who wrote the script.
    • @match indicates on which pages the script should run. In this case, it's set to run on all Chess.com pages.
    • @grant specifies if the script should have any special privileges. Here, it's set to none.

  • The script itself is an immediately invoked function expression (IIFE) to encapsulate its variables and functions, ensuring they don't pollute the global namespace.

  • Inside the IIFE, it appends a <div> to the body of the webpage, displaying a message.

More Complex Scripts:

For more complex interactions, like analyzing chess positions or suggesting moves, you would likely:

  1. Inspect the Website: Use the browser's developer tools to inspect how the chessboard is represented in the DOM and if there are any existing APIs for move analysis.

  2. Inject Libraries or Code: Depending on the complexity, you might want to inject libraries (like chess.js for working with chess logic) into the page.

  3. Observe and Modify: Use MutationObserver or event listeners to observe changes to the board or pieces and modify the game state accordingly.

Keep in mind that interacting with websites in such a way can be against the terms of service of some platforms. Always ensure you're not violating any rules.

Creating advanced scripts requires a good understanding of both JavaScript and the specific website's structure and APIs.