Free tool
Analyze your Lichess games
Lichess already gives you world-class analysis of one game. Audit Chess adds the layer on top: enter your username and it reviews your whole history with Stockfish to show what a single-game view can’t - the openings that keep losing, the mistakes you repeat, and the winning positions you throw away. Free, in your browser, no account.
What Audit Chess adds to Lichess analysis
Lichess per-game analysis answers “what was the best move here?” brilliantly. It is not built to answer “which of my openings should I stop playing?” or “which mistake do I make in every third game?” - those need all your games at once. Audit Chess reads your public games from the Lichess API, scores every move with Stockfish in your browser (a fast depth-8 pass, deeper on demand), and turns them into an opening tree ranked by your real results, a list of the weaknesses that recur, and the games you were winning and lost.
See the side-by-side in Audit Chess vs Lichess analysis.
From your games to what to practise
The blunders and missed tactics in your Lichess games become Stockfish-verified puzzles built from the exact positions you got wrong, so studying your own play turns straight into practice. It also profiles your endgames and playing style. New to engine analysis? Start with how to use Stockfish and how to analyze your chess games.
Play on both platforms?
If you split your games between sites, you can also analyze your Chess.com games the same way and compare the two profiles - the openings and leaks often differ by platform and time control.
What is Audit Chess?
Audit Chess is a chess analysis platform that reads your Chess.com or Lichess game history and identifies the recurring weaknesses, opening tendencies, blunders, blown wins, missed mates and endgame patterns that are hard to see from a single game. It runs Stockfish in your browser, needs no account, and never uploads your games.
What makes it different: most chess engines analyze one position or one game. Audit Chess focuses on the patterns across your whole history - and turns them into training, so your own blunders become Stockfish-verified puzzles and your weakest openings become concrete things to study.
Frequently asked questions
How do I analyze my Lichess games?+
Enter your Lichess username on Audit Chess. It reads your public games from the Lichess API, replays each one with Stockfish, and builds a profile across your whole history: openings ranked by result, the blunders you repeat, the wins you throw away, your endgame and playstyle tendencies, and puzzles from your own mistakes - all in your browser, free.
Does this replace Lichess computer analysis?+
No - it sits on top of it. Lichess is excellent for studying one game or position deeply. Audit Chess analyzes all of your games together to show the cross-game patterns Lichess per-game analysis is not designed to surface: your worst openings by result, repeated mistakes, blown wins, and an endgame and playstyle profile.
Do I need a Lichess account or to be logged in?+
No. Audit Chess only reads the games your Lichess profile already makes public, by username. You do not log in to Lichess and you do not create an account here; the engine runs locally in your browser and nothing is uploaded.
Can I analyze bullet and blitz, or only classical?+
Any time control in your history. You can look at everything together or focus on a format - useful because the openings and mistakes that cost you rating in blitz are often different from your slower games.
Audit Chess is free and not affiliated with Chess.com or Lichess.