Whether you're a beginner learning openings or a tournament player preparing for your next opponent, chess.ceo gives you professional analysis tools right on your phone. Stockfish Engine Analysis
Analyze any position with the world's strongest engine, running
locally on your device — no internet required.

11M+ Game Database
Explore over 11 million master-level games with real-time opening
statistics. For any position, instantly see which moves were played,
how often they led to wins, and at what rating level. Filter by rating
range and time control to find data relevant to your level. Endgame
positions are covered by seven-piece Syzygy tablebases showing perfect
play with distance-to-mate.

Opponent Preparation
Search any player by name, country, or FIDE title. View their game
history, ratings, and most-played openings. Study their repertoire and
identify weaknesses before your next tournament game. Link players
across FIDE and Chess.com profiles.

Live Tournament Broadcasts
Follow ongoing tournaments with live game boards, per-board evaluation
bars, and live standings. Jump straight into any player's games while
a round is in progress.

Full Game Analysis
Import games via PGN — paste from clipboard or load from file. The
engine evaluates every move and shows where mistakes were made. Build
a complete variation tree with main lines and sidelines, annotate key
moments, and save your analysis for later.

PGN Files
Organize your analyzed games into PGN files with folders. Files sync
across devices when you sign in. Import PGN files with hundreds of
games at once or export selected files to share with coaches and
training partners.

Additional Features
• Chess960 (Fischer Random) with one tap
• Chess clock with customizable time controls
• Position editor for setting up any position
• Search games by position across your files
• Landscape and tablet support
• Available in seven languages: English, German, Spanish, French,
Russian, Chinese, and Arabic

Completely Free
chess.ceo is completely free — no ads, no subscriptions, no paywalls.
Just serious chess tools, built for players who want to focus on the
game.

Download now and take your chess preparation to the next level.