Mephisto Chess Extension
Extension Delisted
This extension is no longer available in the official store. Delisted on 2025-09-17.
Extension Actions
- Minor Policy Violation
- Removed Long Ago
Next best move analysis for your favorite chess websites
Mephisto is a browser extension that enables realtime next best move analysis and autoplay on your favorite chess websites.
Mephisto Chess Extension is the perfect tool to hone your chess skills, analyze your games and learn from your mistakes. With a click of a button, Mephisto analyzes your chess game and provides comprehensive information to elucidate the position. Mephisto is 100% free, open-source and collects zero user data.
Features:
- Full support for next best move analysis on Lichess and Chess.com
- Full support for autoplay on Lichess and Chess.com
- "Hand and Brain" training mode to help you spot the best move
- A variety of piece and board themes to pick from
Latest reviews
- Hpz PZ
- very good even i banned for 5 times but ya and please fix en passant bug everytime me or my oppenent do enpassnt move this thing will stop working so please work on it ty.
- Richard Markley
- Its great really helping me learn the best moves
- Liam
- crash every time a pawn takes a pawn at the middle of the latter's 2 squares move!!! PLEASE FIX THIS!
- Jacopo Colombo
- not working anymore :(
- Pourya Shiri
- best chess extension fast and also very very power full, I just change the extension analysis time to 1 second, and it defeated the 3200 chess.com bot with 94% accuracy !! perfect for blitz and bullet, always +90% accuracy it did 66 correct puzzle in 5min puzzle rush, with analysis time of 0.7 second very perfect and underrated chess extension good job to developers who made this
- Boo Boo
- Is great but bugs out when you take en passant.
- One and only goat
- Autoplay doesn't work.
- ñööß
- Very Good! Quick and good analysis. Auto play has to be fixed though at this time, as it doesn't work for a Chromebook. Also a suggestion, maybe have the extension highlight the piece and move location so that you don't have to flip back and forward with the extension?
- Ilya Yanchuk
- nice one. is there a way to change the stockfish to something else?