Chess Coach — Free Game Review for Chess.com and Lichess

Chess.com and Lichess post-game Stockfish analysis, opening study, rated puzzles and personal skill progress.

Chess Coach turns completed games into a clear next step: understand an error, practise the idea and check whether you remember it later. REVIEW YOUR GAMES Open a finished standard game on Chess.com or Lichess, or paste a completed PGN in the training workspace. Bundled Stockfish 19 runs locally on your device. Follow accuracy, move classifications, key moments and a playable engine continuation. Explore why a move was weak on the board, then try to find the improvement yourself. LEARN WITH A PLAN Choose a goal and 15, 30 or 60 minutes a day. Your coach connects lessons, unfamiliar puzzles, opening recall and reviews of your own games. Review each seven-day cycle and build the next one from your recorded results. Studying an example, solving independently and remembering after a pause are tracked separately. OPENINGS WITH EXPLANATIONS Choose White or Black, find an opening and study its ideas, plans and key replies. The teaching collection includes 31 courses and 136 explained branches, including Alien Gambit. Learn a model, practise your own moves and return for spaced recall. Explore the larger reference collection or save lines from your own PGNs. LESSONS AND RATED PUZZLES Work through 96 original lessons with explanations, board examples and practice. Solve from 100,000 bundled Lichess puzzles, filtered by theme, game phase and difficulty. New first attempts update your internal puzzle rating; hints and familiar answers do not count as clean new solutions. Strategic workshops remain unscored. YOUR OWN WORKSPACE Keep completed reports, recurring mistakes, repertoire, notes and learning progress on this device. Use a free board to investigate alternatives or play the local training bot. My games connects saved reviews with the ideas you need to practise next. Analysis and training pause while a game is active or its state is unknown in an accessible chess-site tab. The extension does not play moves on live boards or provide opponent-opening scouting. Chess Coach accuracy, move labels and estimated Elo are local estimates and may differ from Chess.com. Puzzle rating is separate from playing Elo. Completing a plan does not guarantee a rating gain. Analysis time depends on the game and device. No Chess Coach account or subscription is required. Analysis is local; the developer receives no PGNs or analytics. Public completed-game retrieval contacts Chess.com or Lichess when needed. Your data is stored in local browser storage; automatic cloud sync is not included. English is the default interface; Independent project, not affiliated with Chess.com or Lichess. Stockfish is GPLv3; puzzle and opening sources are credited in the bundled notices.