Go Lab: AI Baduk KataGo Engine

KataGo in the palm of your hand. A Go app for serious play and serious review.

Powered by KataGo(b18c384nbt). Includes HumanSL for human-like styles, blunder reports, AI explanation prompts, board photo import, and OGS play. Supports 9x9, 13x13, and 19x19, with every feature and model available at no extra cost.

[KataGo and 3 models]
- High accuracy (b18c384nbt): fast and precise. Ideal for 19x19 play and analysis (CoreML).
- Human-like style (HumanSL): trained on human games. Play opponents from 20 kyu to 9 dan, with modern and classic pre-AlphaGo styles (CoreML).
- Compact (b6c96): small bundled model. Saves storage and memory, and works right away with no download (Metal).

[Real-time analysis]
- Candidate moves: KataGo top 10 with win rate and score estimates.
- Position graph: updated move by move.
- Territory estimate: black and white territory on the board, toggle on or off.
- Thinking time: long reads highlighted in red and yellow.

[Post-game review]
- Blunder report: lists moves that hurt your position, with AI recommendations, variations, and score or win-rate differences by position. Copy and share as an image.
- Analysis mode: create branches from any position, add PV lines, and compare positions in the analysis tree.
- AI explanation prompt: ports the Kifu-Sensei(MIT) concept detection layer. Extracts facts such as cuts, ladders, and chain stability, then builds a precise prompt for your AI so it can explain why a move was bad, beyond KataGo numbers.

[Import from images]
- Detects the board edge and stones from photos or screenshots.
- Analyze the imported position directly with KataGo.

[OGS spectating and play]
- Log in with OGS to watch live games worldwide.
- Play against players and bots.

[Games and records]
- CPU games and local two-player games, with offline support.
- Dead stone check: AI suggests dead stones at the end. Tap the board to adjust, and tune AI sensitivity with a slider.
- SGF import: choose a file or paste text.
- Tsumego mode: 347 problems from Gengen Kikyo and 1,476 from Kanseifu, 1,823 in total. Enjoy classic tsumego offline.

[Focused board]
- Zen mode: quietly fades out non-board UI. Toggle with the Zen button at the top right of the board.
- Full screen: edge-to-edge board, best on 19x19.

[Bonus: beginner lessons]
- Includes beginner and introductory lessons with the Live2D character Sui.
- Practice liberties, atari, capturing, territory, and ko on a 9x9 board.
- Hide lessons on the spot if you do not need them.

Official site: https://apps.vlabos.com/go/