Your Go Games, Deeply Analyzed
StoneBase is a desktop baduk review tool powered by KataGo AI. Import your SGF files, analyze every move, and sharpen your game — all running locally on your machine.
Everything You Need to Improve
From casual review to deep analysis, StoneBase gives you professional-grade tools for studying your games.
Game Library
Import, store, and organize your SGF game files. Upload single files, batch uploads, or entire ZIP archives.
Interactive Go Board
Beautiful canvas-based board with stone placement, move markers, and variation preview on hover.
AI Analysis
KataGo evaluates every move with win rates, candidate moves, score estimates, and principal variations.
Move Tree Navigation
Visual move tree with branching variations. Add comments, annotations, and navigate freely.
Game Metadata
Track player names, ranks, events, komi, handicap, results, and dates for every game.
Game Search
Filter your library by player, date, event, board size, result, and analysis status.
SGF Export
Download your games as standard SGF files, preserving all metadata and analysis.
Board Annotations
Mark positions with circles, squares, triangles, crosses, and text labels for study.
Multi-Language
Full interface available in English and Spanish, with more languages planned.
Works Everywhere
Responsive design that works on desktop, tablet, and mobile browsers.
Batch AI Analysis
Queue multiple games for background KataGo analysis with real-time progress tracking.
Position Search
Find games containing exact or similar board positions across your entire library using Lucene-powered search.
Duplicate Detection
Automatically identify duplicate games via move sequence hashing and merge their analysis data.
Batch Export
Download multiple games at once as a ZIP archive with auto-generated filenames.
Unlimited Library
No cap on the number of games. Build a comprehensive library of thousands of games.
Advanced Filters
Filter by rank ranges, date ranges, komi, handicap, move count, and result type.
How It Works
Get from game to insight in three simple steps.
Import
Upload your SGF files or ZIP archives. StoneBase parses and indexes every game automatically.
Analyze
KataGo evaluates every move — win rate, score lead, top candidate moves, and full principal variations.
Improve
Review your mistakes, explore better variations, search for patterns, and track your progress.
See It in Action
A professional review environment built for serious Go study.
AI analysis with candidate moves, win rate graph, and move tree
Game library with advanced search and batch operations
Advanced search with filters for players, dates, rules, and analysis status
Duplicate game detection with smart merge and cleanup tools
Visual move tree with branching variations and coordinates
Simple, Transparent Pricing
Start free. Upgrade when you need more power.
Free
Perfect for casual review
- Up to 50 games
- Single game AI analysis
- Basic game search
- SGF import & export
- Board annotations
- Move tree navigation
Pro
For dedicated players
$99/year (billed annually)
- Unlimited games
- Batch AI analysis
- Position search (Lucene)
- Duplicate detection & merge
- Batch ZIP export
- Advanced search filters
- Use on up to 3 devices
- Everything in Free
Max
For players who want the strongest analysis
$199/year (billed annually)
- Cloud KataGo analysis (no local GPU needed)
- Stronger neural networks
- Faster analysis speed
- Priority support
- Use on up to 3 devices
- Everything in Pro
Trusted by Go Players
See what our users have to say.
"StoneBase changed the way I review my games. The KataGo integration is seamless and the position search is incredibly powerful."
Alex T.
4 dan
"I imported my entire collection of 2,000+ games. The duplicate detection saved me hours of manual cleanup."
Yuki M.
2 dan
"Finally a Go review tool that works beautifully on my tablet. The responsive design is excellent."
Maria S.
6 kyu