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Game review shouldn't cost a subscription.
Type your chess.com username and Stockfish analyses every move of every game, in your browser, with no limit. Then play it, drill it, and learn from it, all on the same terms.
Stockfish 19 in WebAssembly · 800–3200 ladder · rated puzzles · 3,810 openings · Apple-HIG interface
ReviewEngine analysis, accuracy, move quality, opening names and a coach that explains what the engine found.
PlayStockfish from 800 to 3200 with real clocks, or let a language model choose its moves and say why.
PuzzlesRated tactics, the daily puzzle, and the moves you missed in your own games.
TrainVision drills, textbook endgames against full strength, and Solo Chess.
LearnTactical ideas taught from real positions, with the line played out on the board.
Leaderboardschess.com's live standings, and where you stand.
The engine does the chess
Stockfish decides what was good, what was bad, and what should have been played. Every number on screen is its.
A model only writes
Add a free OpenRouter key and a model explains the engine's findings in plain English. It is told, every time, not to calculate or invent moves.
Nothing leaves your browser
No server, no account, no analytics. Your games come from chess.com's public API; everything else is computed here. Exactly what goes where.