Question 1

Is RV Chess free?

Accepted Answer

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

Question 2

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

Accepted Answer

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.

Question 3

How do I review a Chess.com game?

Accepted Answer

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.

Question 4

How do I review a Lichess game?

Accepted Answer

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.

Question 5

Are the explanations AI-generated?

Accepted Answer

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.

Question 6

Which engine does the analysis?

Accepted Answer

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

Question 7

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

Accepted Answer

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.

Question 8

Can I review a PGN without an account?

Accepted Answer

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.