Go AI: KataGo Offline Trainer

4,121 tsumego and a real KataGo engine, running on your device - not in a data centre. No sign-up, no ads, no game records leaving your phone. Works in airplane mode.

Play Go against a real neural-network KataGo engine that runs entirely on your phone.

TRAIN WITH 4,121 TSUMEGO Problems organised by theme - liberties, atari and capture, connect and cut, shape, snapback, shortage of liberties, net, squeeze, semeai, life and death. Every problem comes with a hint and a full explanation of why the answer works.

A REAL AI, FULLY OFFLINE Go AI runs KataGo, a state-of-the-art neural network Go engine, natively on your device. Play on a plane, on the subway, anywhere you have a few minutes.

12 KYU TO AMATEUR 4 DAN From 12 kyu to amateur 4 dan. Weaker levels don't just play slightly worse - they make the kind of mistakes a real player at that rank makes, so every game stays honest and instructive.

REVIEW EVERY GAME Step through any finished game move by move with a win-rate graph, see exactly where the game turned, and check the top candidate moves at any point.

BUILT FOR FOCUS 13x13 for a quick game, 19x19 for the full experience. Chinese rules, adjustable komi, undo, pass, resign, and move hints always within reach. Light and dark themes, stone sounds and haptics.

TRACK YOUR PROGRESS Win rate, streaks, and a complete record of every game you have played, saved locally on your device.

PRIVACY Go AI collects nothing and sends nothing. The AI is on your device, not in a data centre.

Whether you are learning Go (baduk, weiqi) from scratch, grinding tsumego to climb from 12 kyu toward amateur dan, or just want a strong offline opponent in your pocket - Go AI is built for you.

Free to play with a daily game limit. One-time purchase unlocks unlimited games.