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.