Mephisto is a browser extension that provides next-best-move analysis and can automate gameplay on Chess.com and Lichess.

Mephisto crushing some Puzzle Rush in real-time

Getting Started

    

Click the Mephisto icon to open its popup window. It will automatically detect and analyze the current chess position on the page.

For quick access, pin Mephisto to Chrome’s toolbar:

1. Click the puzzle icon next to Chrome’s address bar.
2. Find "Mephisto Chess Extension" and click the pin icon next to it.

Note: The popup window will close if you click outside of it. To keep it open, right-click the pinned Mephisto icon and select "Inspect Popup."

For more details, visit the Getting Started guide.

How to Develop Locally

Set up a local install:

1. Clone the repo
2. Navigate to chrome://extensions through the Chrome address bar
3. Enable developer mode
4. Click on "Load unpacked" and select the cloned repo folder
5. Mephisto Chess Extension is now installed

Test a code change:

1. Navigate to chrome://extensions
2. Reload Mephisto Chess Extension
3. Reload the webpage you want to test on
4. Test the changes

For technical details, see Technical Overview.

How to Contribute

Thank you for your interest in contributing to Mephisto! There are many ways to contribute, and we appreciate all of them.

Ways to Contribute:

• Help contribute ideas to Mephisto
• Help identify and document bugs with Mephisto
• Implement requested features through PRs
• Fix identified bugs through PRs