Live Stockfish analysis
Read positions through an evaluation bar, best-move and threat arrows, and up to three candidate 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—entirely on-device.

50K+
Puzzles
9
Move grades
100%
Offline
Key features
Read positions through an evaluation bar, best-move and threat arrows, and up to three candidate lines.

Filter by rating and motifs such as pins, forks and skewers to train the patterns that need work.

Grade every move on nine levels, inspect the advantage graph and replay turning points against the engine.

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.
Screen gallery
6 SCREENS · v1.0.19






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
v1.0.19
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