Guides

How GChess Review works, and how to get the most from it.

• What Brilliant, Great, Mistake and Blunder mean: The exact rules GChess Review uses to label every move, from Brilliant and Great to Inaccuracy, Mistake, Blunder and Miss.
• How a chess game review works: What happens between pasting a game and seeing every move graded: the quick pass, the deep pass on critical moments, and why it all runs in your browser.
• Review your Chess.com games for free, with no account: How to get a free, unlimited move-by-move review of any Chess.com game, with Stockfish 19 in your browser and no sign-up.
• Review your Lichess games move by move: How to get a move-by-move review of any Lichess game, with every move labelled from Brilliant to Blunder and the critical moments found for you.
• Stockfish 19 in your browser: Lite, Full and threads: How GChess Review runs Stockfish 19 inside your browser with WebAssembly: the Lite and Full engines, multi-threading, and what is stored on your device.
• Free chess puzzles by theme: Nearly 10,000 free chess puzzles from the Lichess database, sorted into books by theme: openings, tactics, checkmates, endgames and defence.