Official Go game of International AI Go Association. Online games intorduced!

The strongest, the best Go app in the world based on Crazy Stone employing Deep Learning technology !

New Features!!

-Online Games against Go players all over the world

-IAGA Rating Certification Tests

Challenge the Dan/Kyu tests provided by the International AI Go Association.

-Premium Membership

Completely ad free, higher levels and additional features for Premium Members.

Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search. The highest level of Crazy Stone Deep Learning has achieved 5d in kgs rating and in this lite version, we have provided you the highest level of 2d for FREE!

* 17 levels of play from 15k to 2d

There are 17 levels of play (15k-2d) for all the board sizes. Crazy Stone has improved not only in strength, but also in his style of play and the lower levels are perfect for players who want to learn the game of Go.

Now, the strongest level for Premium Members is 5d.

* IAGA Rating Certification Test

Challenge the Dan/Kyu tests provided by the International AI Go Association. You will be awarded certificate images if you pass the tests.

(You will need to register an AI Game Account to challenge the tests. Registration is free)　

* Export and import sgf game files

You will be able to import and export game records in sgf format from other apps. Also you can copy game record data to the clipboard.

* Rating Mode

Test your skills with serious games against the AI, keeps track of the results of your games and the history of your rating!

The Rating Mode will be partly unlocked if you reach 7k IAGA Rating. If you become a premium member, all of the Rating Mode features will be unlocked immediately.

* Other features

・Friendly 3 input methods

You can choose from 3 options of input methods (Zoom, Cursor & Touch).

・17 levels of play for each board size (9x9, 13x13, 19x19)

・Human vs Computer, Human vs Human (sharing a single device)

・Computer vs Computer Games

・Handicap games, variable options of Komi

・Hint (suggest)

・Instant Undo (available even when the computer is thinking)

・Automatic territory calculation

・Japanese/Chinese Rules

・Suspend/Re-start games

・Save/Load game record in sgf files

・Automatic and manual replay of a game record

・Highlight the last move

・COM resign feature

・Byoyomi games

(You will not be able to select computer level in timed games)

・Atari warning

・Highlight the last move

・Play speed can be adjusted

*Notes for Premium Member (Monthly Subscription)

The benefits of Premium Members are:

-Completely ad free

-Maximum AI playing strength will rise to 5dan

-Play Rating Mode for all 3 board sizes

-Challenge the IAGA Certification Tests higher than 7kyu

The Premium Membership is a monthly subscription service.

The Subscription will be renewed automatically unless cancelled more than 24 hours before the end of its current period.

To turn-off the auto renewal of subscription, please open the Google Play Store app and change your Google Play Account settings.

You will not be able to cancel the current subscription during its active period.

* This app is certified by International AI Go Association