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 chess engine. Stockfish runs locally on your device,
so no internet is required. Configure up to five analysis lines and adjust engine threads for deeper
calculations. A real-time evaluation bar shows who's winning at a glance, with best-move arrows
displayed directly on the board.

10M+ Game Database
Explore over 10 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.

Multiple Board Tabs
Work on several games at once. Each board tab maintains its own position, move tree, and analysis
state. Switch between tabs instantly — your work is saved automatically and persists between
sessions.

Board Customization
Choose from 16 board themes and 15 piece sets to create your preferred look. Adjust coordinates,
animations, and piece movement style, and set your preferred font size for comfortable reading.

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 six languages: English, German, Spanish, French, Russian, and Chinese

No Ads. No Subscriptions for Core Features.
chess.ceo is built for chess players who want serious tools without distractions.

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