Engine analysis
See Stockfish evaluations and move grades.
Stockfish evaluates the position and shows candidate moves in real time. Learn the nine move grades from Brilliant to Blunder, and study opening ideas with their main lines.



Game
iOS · Android
An offline chess lab that explains every move
Run Stockfish analysis, solve more than 50,000 tactical puzzles, study openings and review complete games, all on-device.
Free download code for students
50K+
Puzzles
9
Move grades
100%
Offline
Screenshots
10 screenshots
Engine analysis
Stockfish evaluates the position and shows candidate moves in real time. Learn the nine move grades from Brilliant to Blunder, and study opening ideas with their main lines.



Review and training
After a game you get accuracy and a count of moves by grade. Filter more than 50,000 tactical puzzles by theme and rating to practice the patterns you miss.



Your chess environment
Reopen automatically saved PGN games, and use bullet, blitz, rapid or classical clocks for offline play. The board theme, pieces, coordinates and arrows can be changed.



Made for
Beginners learning tactical fundamentals
Club players reducing blunders and opening gaps
Advanced players who need deep engine analysis
Privacy & note
The engine and game analysis run offline, with no account or personal-data collection required.
FAQ
The engine and game analysis run fully offline, with no account or personal-data collection.
Stockfish, surfaced through an evaluation bar, best-move and threat arrows and up to three candidate lines.
Filter more than 50,000 puzzles by rating and motifs such as pins, forks and skewers.
Get the app
v1.0.29 · 124 MB · iOS 15.6+ · Android
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