Chess Engine

Professional-level chess analysis on your phone. ChessThink is the all-in-one chess app to analyze, play, train and explore - for everyone from beginners to grandmasters.

🔥 Powered by Stockfish 19 NNUE - the newest release of the world's strongest chess engine, running natively on your device. Up to +44 Elo over Stockfish 18, and no analysis ever leaves your phone.

📊 ANALYZE
• Engine evaluation of every move, with multiple best lines (MultiPV)
• Game Review: per-side accuracy and move ratings - Brilliant, Best, Inaccuracy, Mistake, Blunder
• Evaluation bar, eval graph and best-move arrows
• Adjustable depth, from a quick check to a deep search
• Set up any position, or import games via PGN/FEN (Chess960 supported)
• Save analyses and add your own comments

♟ PLAY & TRAIN
• Play bots from beginner to grandmaster, with hints and time controls
• Tournament ladder - climb it one opponent at a time
• Local 2-player mode with a real chess clock
• Daily Challenge with a solving streak

📷 SCAN A POSITION (Alpha)
• Point the app at a screenshot of a board and get a position you can analyze
• Runs entirely on the device - no upload, no server

📚 EXPLORE
• Automatic opening detection + a browsable openings library
• Master endgames with Syzygy tablebases
• Analysis Explorer - your personal opening book, built from your own analyses
• Chess DNA - a private dashboard of how you play and study

💡 WHY CHESSTHINK?
• Works offline - after a one-time engine download, analysis needs no internet
• No account required
• Your games and analyses stay on your device
• 11 board themes, 8 languages, light and dark
• Free, supported by ads

Whether you are reviewing your last blitz game, drilling an endgame, building an opening repertoire or just curious what the engine thinks - ChessThink gives you the answer in seconds.

Download ChessThink and take your chess to the next level.