Free Chess Analysis, Game Review & Advanced Stats
chessrank.org is a free, all-in-one chess analysis site powered by the full Stockfish engine, running entirely in your browser. Review your games move by move, run a performance report over dozens of games, train on your own blunders, solve rated puzzles and explore any position on an engine board — all in one place, with no signup and no daily limits.
Load your games straight from your chess.com or lichess username, or paste a PGN. Every game is analyzed locally on your own device, so your analysis is private, unlimited and completely free — the same move-by-move game review you know from chess.com, without the paywall.
Whether you want a single game review, a deep dive into your recent form, or a way to fix the mistakes that keep costing you rating, everything here runs on Stockfish and is free to use as much as you like.
Everything you can do on chessrank.org
Game analysis & review
A full move-by-move game review: an accuracy score for both sides and every move graded from brilliant and best down to inaccuracy, mistake and blunder, with the best move at each turning point.
Performance report & advanced stats
Zoom out from one game to your recent form. The report analyzes every game in a time window and turns them into advanced stats — accuracy over time, win rate, best and worst openings and rating trend, broken down per time control.
Blunder puzzles from your games
Turn your own mistakes into training. The blunders and mistakes from your chess.com and lichess games are replayed as puzzles, so you drill the exact positions where you went wrong.
Rated puzzles & tactics trainer
Sharpen your tactics with free, rated puzzles drawn from real games, plus a fast puzzle-rush mode, custom puzzles and a global leaderboard — all with a rating that calibrates to your level.
Analysis board
Set up any position, paste a FEN or play through a line and watch the Stockfish evaluation, best move and principal variation update in real time — for openings, middlegames and endgames.
Free, private & unlimited
Stockfish (WebAssembly) runs on your own device, so nothing is uploaded and there are no daily limits. Every tool is free, with no account required to start.
How to get started
Load your games
Enter your chess.com or lichess username to pull your recent games, or paste a PGN to analyze a single game.
Review a game
Run a free move-by-move review to see your accuracy, your blunders and the best move you missed in each key position.
See your stats
Run a performance report to turn dozens of games into advanced stats — accuracy, win rate, openings and rating trend per time control.
Train your weaknesses
Replay your own blunders as puzzles and solve rated tactics, so you stop repeating the mistakes that cost you rating.
Frequently asked questions
Is chessrank.org free?
Yes, completely, and it is unlimited. Game review, the performance report, blunder puzzles, the tactics trainer and the analysis board are all free with no signup and no daily limits, because Stockfish runs locally in your browser.
What can I do here?
You can review any game move by move, run a performance report with advanced stats over many games, train on the blunders from your own games, solve rated puzzles, and analyze any position on an engine board — all in one place.
Can I analyze my chess.com and lichess games?
Yes. Enter your chess.com or lichess username to load your recent games, or paste a PGN to analyze any single game — no linked account required.
Do I need to create an account?
No. Every tool works without an account. An optional account only adds cross-device sync for your puzzle rating and streaks.
Which chess engine is used?
The analysis uses Stockfish 18, one of the strongest chess engines in the world, compiled to WebAssembly so it runs directly on your device at real analysis depth.
How is this different from chess.com Game Review?
The review itself is very similar — accuracy, move grades and the best move at each turning point. The difference is that everything here is free, has no daily limit, runs in your browser instead of the cloud, and also works with lichess games and raw PGNs.
Are my games kept private?
Yes. Everything is analyzed in your browser, so your games are never uploaded and nothing is stored on our servers.