dxc4.com
ProfessionalChess Analysis
A browser-based chess analysis tool that runs entirely on your device.
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100% client-side • Private • Free
♞
Complete Analysis Tools
- Stockfish-Powered Analysis
- Professional-grade position evaluation with Stockfish 16. Real-time analysis with clickable best moves, principal variations, and continuous background analysis as you play.
- Opening Detection
- Real-time opening detection with ECO classification from our comprehensive database of 3,546 openings. View popular variations, next moves, and opening statistics with interactive suggestions.
- Automatic Game Branching
- Explore variations without losing your analysis. When you rewind and make different moves, the original line is automatically saved as a branch. Switch between branches, rename them, and analyze multiple lines simultaneously.
- Game Import & Export
- Import PGN games with complete move history tracking. Navigate move-by-move, create variations from any position, and share analyzed games with URL encoding.
- Win Probability Tracking
- Interactive win probability charts that track evaluation changes throughout the game. Identify blunders, brilliant moves, and game phases. Click any chart point to jump to that position instantly.
View an example game
London1851
Adolf Anderssen
Lionel Kieseritzky
The archetypal romantic king hunt: Anderssen gives up both rooks and the queen to deliver a picturesque mate.
Third Rosenwald Trophy1956
Donald Byrne
Robert James Fischer
A 13-year-old Fischer detonates …Na4!! and a queen sacrifice; one of the most famous tactical displays ever.
Hoogovens Group A1999
Garry Kasparov
Veselin Topalov
24.Rxd4!!, 25.Re7+!!, a king hunt, and a glorious finish—many vote this the greatest modern game.
Built With Modern Technology
Client-side processing with no server dependencies. No servers, no data collection, no registration required. Games and all their branches are encoded directly in the URL, making them easily shareable while keeping your analysis completely private.
- Modern Frontend
- Built with React 18, TypeScript, and Next.js 14 App Router. Styled with TailwindCSS and Chessground for interactive board UI.
- Stockfish WASM Engine
- Stockfish 16 compiled to WebAssembly for browser-based processing. Configurable depth analysis with real-time evaluation updates.
Ready to improve your chess?
Start analyzing your games today with our free chess analysis tool. No registration required.