About ChessReviewMaxx
ChessReviewMaxx is a free tool that reviews many of your chess games at once with the Stockfish engine, finds the mistakes you keep making, and turns them into a concrete study plan. Everything runs in your browser.
Last updated: September 1, 2026
Why it exists
Single-game analysis is easy to find and not very useful on its own. One blunder in one game tells you almost nothing about what to work on. The signal is in the pattern: the opening line you always misplay, the endgame you never convert, the fact that most of your rating points leak away in the first ten minutes of rapid games.
That pattern only shows up when you look at dozens or hundreds of games together. ChessReviewMaxx exists to make that bulk view a single click instead of an afternoon of manual work.
What it does
- Bulk analysis. Pull your whole game history (or any slice of it: time control, colour, result, rating range, date range) and run every game through Stockfish.
- A cross-game report. Move-quality breakdown, accuracy, how you compare with the opponents you actually faced, accuracy by phase, rating progression, recurring pawn structures, and more.
- An improvement plan. Prioritised, specific actions — the exact opening lines, tactical motifs and endgame theory to study — each linked to the position in your own games where it went wrong.
- Training built from your mistakes. The positions you misplayed become interactive puzzles with staged hints and full explanations.
How it works, briefly
When you enter a username, your browser fetches that player's public games directly from the Chess.com or Lichess API. Each game is analysed locally by Stockfish compiled to WebAssembly, running across a pool of Web Workers. The report and the training course are assembled in the page. Nothing is uploaded, and there is no account. For the full technical picture, see how the analysis works.
Free, private, and open
ChessReviewMaxx is free to use with no sign-up. Because analysis happens on your own device, your game history is never sent to us or stored on a server. The site shows ads through Google AdSense to cover its costs; what that means for your data is described in the privacy policy.
The source code is public on GitHub. It builds on Stockfish (GPLv3), chess.js (BSD-2-Clause), the Lichess chess-openings dataset (CC0-1.0), and the Cburnett piece set, each used under its own licence.
Who makes it
ChessReviewMaxx is built by Terako, a small technology collective based in Montréal. Questions, bug reports and feature requests are welcome — see the contact page.