Free, unlimited chess game review
Paste any game and get a full Stockfish 19 review in your browser: accuracy, move-by-move feedback and the best lines. No daily limit and no account needed.
How to start: copy the PGN of your game, open the analysis board, paste it, and press Review. That is it. There is no daily limit.
What you get
- Accuracy for both players, plus a letter grade for the opening, middlegame and endgame.
- Every move classified: Brilliant, Only move, Best, Strong, Fine, Inaccuracy, Mistake, Missed win, Blunder and Theory (book moves).
- The best line at every point, so you can see what you should have played and why.
- An evaluation graph to jump straight to the moments where the game turned.
- Opening name and database statistics from master and tournament games.
Why it is free and unlimited
Many chess sites limit full game reviews on free plans, because running the engine on their servers costs money. Chessmoose runs Stockfish 19 directly in your browser using WebAssembly. Your own device does the work, so there is nothing to ration. Your games are not uploaded for analysis.
How to review a game, step by step
- Get the PGNOn Chess.com, open the finished game, choose Share and copy the PGN. On Lichess, open the game and copy the PGN from the Share and export tab. Games you play on Chessmoose are saved automatically.
- Paste itOpen the analysis board, choose Import game, paste the PGN and press Import to board.
- Run the reviewPress Review. Every move is checked with Stockfish 19. On devices with several cores, several engines work in parallel to speed it up.
- Go to the turning pointsClick the biggest drops on the evaluation graph first. Those two or three moments decide most games.
- Play the better moveTry the engine's suggestion on the board and play a few moves of the line yourself until the idea is clear.
How to learn the most from a review
- Think before you look. Go through the game yourself first and note where you were unsure. Then compare with the engine.
- Look for patterns, not single moves. If you keep missing knight forks or losing on time in the endgame, that is what to train next.
- Turn mistakes into training. Missed tactics? Do rated puzzles on that theme. Lost a won ending? Practise it in the endgame trainer.
Frequently asked questions
- Is the game review really unlimited?
- Yes. Stockfish 19 runs in your own browser, so there is no server cost per review and no daily limit.
- Do I need an account?
- No. Paste a PGN and press Review. An account only syncs your saved games between devices.
- Can I review games from Chess.com or Lichess?
- Yes. Download or copy the PGN from Chess.com or Lichess and paste it into the analysis board. Games you play against Chessmoose bots or online open in review with one click.
- How is accuracy calculated?
- Each move is compared with Stockfish. The drop in winning chances after your move is converted to a score per move, and the average over the game is your accuracy for both players.
- Does it work on a phone?
- Yes. The review runs in mobile browsers too, it just takes a little longer on slower phones.