Enter a Lichess or Chess.com username, pick a game and press “Review game”. Blunders, mistakes and accuracy in about a minute.
How to use it
- Find games. Choose a site, enter a username and press “Find”. The last 12 games appear.
- Open a game. Click a game in the list, or paste a PGN below.
- Run the review. “Review game” rates every move. Blunders are marked “??”, mistakes “?”, inaccuracies “?!”.
- Study key moments. Click moves or the graph to jump to a position. The engine on the right shows what to play.
Frequently asked questions
Do I need my Lichess or Chess.com password?
No. Games are loaded from the sites' public data by username.
How is accuracy calculated?
For each move the engine checks how much your winning chances dropped. Fewer losses mean a higher percentage.
Are my games stored anywhere?
No, everything happens in your browser. We do not store games on a server.
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