About

It's an open clone of chess.com's Game Review: paste a PGN or import a game from your Chess.com or Lichess username, and get a move-by-move breakdown — classifications (Brilliant → Blunder), per-player accuracy and an estimated rating, an interactive eval graph, a guided walkthrough of the key moments, and push-style coach commentary.

Why it exists

Game review is one of the best ways to improve, but the polished versions are metered — chess.com limits free reviews to one per day. The wedge here is simple: free, unlimited, no ads, no account. Nothing is held back behind a paywall.

How it works

Everything is client-side. Stockfish runs as a WebAssembly worker (multi-threaded when your browser allows it), evaluating every position in parallel across your CPU cores. Win probability and accuracy use lichess's open formulas; move classification follows chess.com's “expected points” model. There are no servers and no accounts — your games never leave your device.

What it does

• 10 move classifications on a win-probability model, with sacrifice / only-move / missed-win detectors
• Per-player accuracy, estimated rating, and average centipawn loss
• Interactive eval graph with key moments, and a guided review with “best move” + punishment-line previews
• Opening detection, a live analysis board, and a variation explorer
• Import recent games from a Chess.com or Lichess username, or paste a PGN
• Light / dark themes and a board-theme picker

Honest notes

• The estimated rating is a calibration-in-progress heuristic, not an official figure.
• This is an independent learning project — not affiliated with Chess.com or Lichess.
• Move/capture sounds are lichess's set, used for personal/non-commercial purposes.

See the Privacy and Terms pages for the details, or just review a game.