Everything RV Chess does

One page listing the whole tool — the game review, the analysis board, and the smaller things that make either one quicker to use.

Game review

• Full-game Stockfish 18 review — every move scored against the engine's own choice. What a review includes.
• Move classification — brilliant, only move, best, excellent, good, inaccuracy, mistake and blunder, on published thresholds. Brilliant has an exact test rather than a vibe.
• Accuracy and performance rating per player — calculated here, and usable as a standalone accuracy checker.
• Evaluation bar and clickable graph — jump to the swing instead of hunting for it. Arrow keys step the game; the graph is keyboard-reachable too.
• Best lines you can walk into — click any move in the engine's continuation to see the position it leads to, then drop back into the game.
• Play from any position — make your own move on the board mid-review and the engine evaluates it live.

Analysis board

• Sandbox — set up any position by dragging pieces already on the board or in from the tray, or by pasting a FEN, then play both sides with Stockfish evaluating as you go.
• Best-move arrows — the top one, two or three engine choices drawn on the board, or none if you would rather think first.
• The same move controls as game review — jump to the start or end, step with the buttons or arrow keys, and flip the board from the shared control row.

Getting games in

• The rv shortcut — type rv in front of chess.com in any game address and the review opens directly. How it works.
• Link import — Chess.com live, daily, computer and master-archive links, and every Lichess address form.
• PGN paste — a game from any site at all.
• Username search — look up a Chess.com username and pick from recent games, which is the easy route when the game was played on your phone.

Around the review

• Guess the Elo — a five-round game built from real rated games, including eligible games from your own local review history, with a score based on how close each estimate is.
• Saved reviews — finished reviews stay in your browser, so reopening one is instant and does not re-run the engine. Clearing them is one button.
• Shareable position cards — turn a moment from a game into an image with the board, the move and its label on it.
• Player cards — names, ratings and result read from the game itself.
• Engine depth and build — trade speed against strength, on a machine as slow or fast as the one you happen to be using.
• Move sounds and a board that works on a phone — including swipe to step.

What it deliberately does not do

There are no accounts and no paywall, because Stockfish 18 runs inside your browser tab as WebAssembly rather than on a server. Reviews remain on your machine by default. You can separately opt in to contribute a de-identified game for product research, see exactly what is removed, and delete your contributions. Local analysis does not depend on that option — which is also why there is no daily limit to hit.

Try it on a game