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 chess accuracy checker

Paste a game to see your accuracy, performance rating, move labels and evaluation graph.

Updated 14 August 2026

Review your game now

Accuracy is more than matching the engine

A useful accuracy score measures how much winning chance each move gave away. A quiet move in a balanced position and a pawn loss in a winning position should not count the same, so each move is scored relative to the position before it.

See the moves behind your score

A percentage on its own does not tell you how to improve. The review also shows your biggest mistakes, blunders, brilliant moves, best alternatives and the point where the evaluation swung. Read the full method on the chess accuracy calculator page.

Check any game free

Paste a Chess.com or Lichess game, paste a PGN, or search a Chess.com username. There is no account, no daily limit and no upload.

Check your chess accuracy