Black & White Go

Black & White Go — the strongest Go AI in your pocket.

Powered by KataGo, the world's strongest open-source Go engine, built right into the app. Play and review games anytime, anywhere — fully offline.

STRICTLY FAIR GAMES • 15 difficulty levels — from beginner to strong amateur • 9×9, 13×13 and 19×19 boards • Even games, nigiri, 2–9 stone handicap, free handicap placement • Pass, undo and resign supported • Games are saved automatically — resume anytime

PLAY YOUR WAY • Play Black or White against the AI • Play face-to-face with a friend • Watch AI vs AI games and learn

AI REVIEW — IMPROVE EVERY GAME • Full-game win-rate graph at a glance • Automatic mistake marking: blunder / mistake / inaccuracy • At every marked move, see the AI's recommended play on the board • Choose analysis depth (Fast / Standard / Thorough) — remembered for next time • Tap the graph to jump to any move, or step 10 moves at a time

POSITION ANALYSIS • Estimate territory and influence while you play

Available in Korean and English.