KataDroid

Offline KataGo analysis and SGF editing for Android, with LiteRT CPU and optional NPU inference.

An Android Go board with offline KataGo analysis, variations and SGF editing. The app runs the official KataGo search and rules engine locally, with LiteRT neural inference. No account or analysis server is required.

Features Play either color manually, let KataGo play Black or White, or enable both for self-play. Toggle analysis from the top-right switch; set an initial/history/automatic-play budget from 1 to 50,000 visits. Candidate colors reflect win-rate loss relative to the best evaluated move, from the player-to-move perspective: near-best green, then yellow, then red. Three near-equal opening moves can all be green at about 50% win rate. Hold a candidate to preview its variation. Tap the win-rate chart or a tree node to navigate the game; earlier branches and saved analyses remain available. Opening a game analyzes the current position first, then fills the whole SGF's history and variations to build a win-rate curve from the opening onward. Once history is complete, the selected position keeps searching until KataGo is paused. Live search snapshots refresh about every 250 ms. Candidate markers are hidden whenever either player is automatic; win rates remain available. Import/export 19×19 SGF with variations, comments, player metadata and root setup stones. Player panels display SGF names and ranks (kyu, dan or professional). Chinese, Japanese and Korean rules; komi from −400 to 400, including decimals. Physical-pixel touch offset, drag-to-preview placement and a larger landscape board. Switch between bundled b6c96 and b10c128 networks, select Auto / CPU / NPU, and measure actual search visits/s on three fixed positions. English and Simplified Chinese interfaces, following Android's app/system language.

License

MIT