Deep chess analysis
Stockfish 16 running locally in your browser. No installation, no accounts, no data leaves your machine.
Every move, measured
Interactive evaluation charts track how advantage shifts throughout a game. Click any point to jump to that position.
Stockfish 16
Real-time position evaluation with clickable best moves and principal variations.
3,546 openings recognized
ECO classification with variations and suggested next moves, updated as you play.
Automatic branching
Explore alternative lines without losing your analysis. Every variation is preserved.
Win probability visualization
See how advantage shifts move by move. Identify critical moments instantly.
Chess.com integration & PGN support
Import your Chess.com game history. Browse by month, analyze with one click. Also supports PGN import with shareable URL encoding.
Classic games
The Immortal Game
1851Adolf Anderssen vs Lionel Kieseritzky
Game of the Century
1956Donald Byrne vs Robert James Fischer
Kasparov's Immortal
1999Garry Kasparov vs Veselin Topalov
Start with your own games
Import from Chess.com or paste a PGN. Analysis runs locally — nothing is sent to a server.