Yes. Game review is free, with no account and no limit on how many games you analyse.

I have used my free Chess.com Game Review for the day. What now?

Open the same game here instead. Type rv in front of chess.com in the game's address: chess.com/game/live/12345678 becomes rvchess.com/game/live/12345678, and a full review builds itself. There is no daily cap because the engine runs in your browser rather than on a server.

How do I review a Chess.com game?

Type rv in front of chess.com in a saved live, daily, or computer game link, paste the link into the import box, or look the game up by Chess.com username.

How do I review a Lichess game?

Paste the game link into the import box. Any Lichess address works: the plain lichess.org/abcd1234 form, the longer one your own games get, and the /white and /black variants.

Are the explanations AI-generated?

No. There is no language model in the review. Move labels come from Stockfish 18's evaluations and published thresholds, and an explanation such as a fork or a hanging piece is shown only when replaying the moves on the board proves it. When nothing can be proven, the review says only what the engine found.

Which engine does the analysis?

Stockfish 18, compiled to WebAssembly. Analysis stays inside your browser. Completed games are contributed only if you explicitly enable the de-identified research option.

Can I analyse a single position instead of a whole game?

Yes. Open the sandbox, set the position up by dragging pieces or pasting a FEN, and Stockfish evaluates it live as you play both sides, with the best moves drawn on the board.

Can I review a PGN without an account?

Yes. Paste the PGN into the import panel and the review starts on its own. No sign-in is required; game contribution is off by default.

Free online chess analyzer

Import a game and see what changed it. Stockfish 18 shows the mistakes, best lines and turning point.

Updated 14 August 2026

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What this chess analyzer shows

This full-game analysis adds context to the engine number. It scores both players, labels every move, plots the evaluation and gives the stronger continuation at the positions that mattered.

Accuracy and performance rating for both sides.
Brilliant, best, excellent, good, inaccuracy, mistake and blunder labels.
A clickable evaluation graph to jump to the moment the game turned.
Stockfish's preferred move and continuation at every position.

Analyze a Chess.com, Lichess or PGN game

Paste a Chess.com or Lichess game link, paste the PGN from any chess site, or search a Chess.com username for a recent game. The accuracy calculator explains how the percentage is produced rather than treating it as a mysterious score.

Free and private in your browser

Stockfish 18 runs locally in your browser through WebAssembly. There is no account, no daily review limit and no upload of your game positions.

Analyze a chess game