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.

RV Chess in ChatGPT and Claude

Paste a game link in a chat, get the RV Chess board and Stockfish review there, and ask about any move.

Updated 23 October 2026

What it does

Review a game: paste a Chess.com or Lichess link, or a PGN, and ask for a review. The same board and Stockfish 18 review as this site open in the chat.
Ask about a move: click a move on the board, then ask why it was a mistake, what each side's plan is, or why one move is better than another. The answers use fresh engine lines from that exact position.
Try a what-if: ask what changes if a piece stood on another square.
Find your games: give your Chess.com or Lichess username and pick one of your last five games.
Openings and bots: ask for a named opening, or open Drawfish and the other play modes.

Add it to Claude

In Claude, open Settings → Connectors → Add custom connector.
Name it RV Chess and paste https://rvchess.com/api/claude-mcp. No sign-in or API key is needed.
For better answers, also add the plugin: download rvchess-claude.zip and upload it under Customize → Plugins → Add → Upload plugin.
In a new chat, send Review this game: 1. f3 e5 2. g4 Qh4# *.

Add it to ChatGPT

In ChatGPT's settings, turn on Developer mode, then create a new connector.
Name it RV Chess, paste https://rvchess.com/api/chess-mcp and choose no authentication.
In a new chat, turn RV Chess on and send Use RV Chess to review this game: followed by a game link.

Good to know

The board and Stockfish run inside the chat window, the same way they run in your browser here. The plugin has no account, no payments and no limit. The review results are sent to the chat so the assistant can explain them. Games up to 160 half-moves are supported. See the privacy and support pages, or review a game on the site without a chat at all.