AI Go King Android

AI Go King is one app for playing Go against AI, replaying professional games and solving tsumego (life-and-death problems).

■ On-device AI that works offline
• KataGo, an open-source Go AI, runs directly on your phone, so you can play on a plane or on the subway without an internet connection.
• There are three AI models: Fast, Standard and Strong. Fast is built in, and you can download Standard and Strong in Settings.
• You choose how long the AI thinks. More thinking time makes it play stronger.
• The AI resigns once the game is clearly lost.

■ Cloud AI from 18 kyu to 9 dan
• Pick your opponent's rank: 18k, 15k, 12k, 9k, 6k, 3k, 1k, 1d, 3d, 5d, 7d or 9d.
• Turn on "Play like a human" and the AI plays the way a person of that rank would.
• With it off, you face the Strongest AI at full strength.
• A live win rate shows who is ahead.

■ 1:1 with a friend
• Take turns on one phone.

■ Game settings
• Board size 9×9, 13×13 or 19×19
• Even game or a handicap of 2 to 9 stones, with your choice of komi
• Korean, Japanese or Chinese rules
• Time limit of 5, 10, 20 or 30 minutes, or no limit
• Play Black or White and name your game

■ Help during the game
• Ask for a hint to see the move the AI recommends.
• Undo up to 3 times per game. After that, watch a short ad to undo once more. With PRO Membership, undo is unlimited and ad-free.
• Confirm each move with a second tap so a stray touch doesn't place a stone.
• When the game ends, the AI counts the territory and shows the result.
• Games save automatically. Use "New game from here" to branch off at any position.

■ Pro game records
• Browse the latest professional games and search by tournament or player.
• Step through a game move by move, jump 5 moves at a time, or use auto play.
• Records with AI analysis show Black's and White's win rate for every move.
• From any position, keep playing against the AI.
• Reopen your 5 most recently viewed game records right from the lobby.

■ Tsumego
• Train your reading with Beginner, Intermediate and Advanced problem sets.
• Solve each problem by placing stones on the board. The app saves your accuracy and history.

■ Themes
• Choose from 4 app themes (Wood Arena, Hanji, Monochrome, Indigo) and 6 board themes in Settings.

■ PRO Membership
• Play without app-open, banner or rewarded ads.
• Unlimited hints, undo and position estimates in games, plus unlimited estimates in game records.
• Unlock 3 eye-friendly boards: Sage, Mist and Dusk.
• A monthly subscription that renews automatically. Cancel anytime in Google Play.

■ Languages
English, 한국어, 日本語, 简体中文, 繁體中文

This app uses the open-source Go engine KataGo (MIT License).

• Fixed an issue where the game-over screen would disappear after resigning during position analysis.
• Fixed an issue where undoing a move while a hint was loading could show an outdated hint or use up a hint.