About ChessRanger

• PlayGames against an engine that ranges from a gentle beginner to a strong opponent, in several playing styles.
• CoachExplains moves in plain language while you play, and remembers what you keep getting wrong between sessions.
• PuzzlesTactics at your level, with the ones you miss coming back as practice. A new puzzle every day on the daily puzzle page.
• OpeningsLearn and drill real lines, backed by the openings grandmasters actually play and a research library of every catalogued opening.
• EndgamesThe positions every player needs, from king-and-pawn endings to the basic rook endings, played out against the engine.
• AnalysisPaste a PGN or pull your recent Chess.com or Lichess games, then step through them with the engine.
• LearnA fundamentals course, famous games replayed move by move, and a glossary of the terms players use.

The chess engine is Stockfish, and it runs in your own browser. Analysing a game does not mean uploading it anywhere, and the engine keeps working on a slow connection once it has loaded.

You do not need an account. Guests can play and train straight away, and everything they do is kept in their browser. A free account saves your games, ratings and progress to the server and syncs them across devices; it is also what lets the coach remember you from one session to the next.

Everything described on this page is free to use.

An engine evaluation is a search to a fixed depth, the ratings here are ChessRanger ratings rather than FIDE or online-site ratings, and the coach can be confidently wrong about a subtlety. What ChessRanger is spells out where each number comes from and where it is weakest.

The privacy policy says what is stored and why. From Settings you can download everything held against your account, or erase it.

Questions, corrections and bug reports: hello@chessranger.com. Building something? The opening, puzzle and rating datasets are available read-only through the public API.