Champion Go Downloads & RevenueChampion Go · App Store

Crazy Stone is a popularly known Go engine, based on the Monte-Carlo evaluation technique,
combined with tree search, and has achieved 6d at KGS rating.
We have optimized this particular version for the iPhone and the strength is from beginner level
to around 1d.

Champion Go is a Go application from beginner to expert!

We have also provided 'Engine Server Game' mode (playing tickets are required).
In this mode, you can play games against the latest Deep Learning version of Crazy Stone
which is installed in our computer server. Therefore you can enjoy online games against a very strong computer program.

■ Medal challenge mode
Champion Go has 2 game modes, Normal game & Medal challenge.
In Medal challenge, there are 150 different levels of play
set by combination of COM level, handicap & board size.

You can win medals by defeating computer under the specified conditions.
Why don't you challenge to collect all the medals!

■ Engine Server Game
(Playing tickets are required for these games)
There are 12 levels of play for each 9x9,13x13,19x19 board size.
If you want to play against the one of the stongest computer programs,
please enjoy online games against our Go Server Engine.

Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search.
The new program has scored a winning rate of over 90% against the previous version!

We have upgraded our Go Engine Server to this latest version, and now you can play games against Crazy Stone
that has achieved 7d on kgs rating.
(We have provided a 8 core engine server for these games)

■ Friendly 3 input methods
There are 3 options of input methods (Zoom, Cursor & Touch).

■ Helpful Game record features
You can view full game history in the game record and restart game from the selected move,
which should help reviewing your game.
Various Game record features should be practical for improving your Go.

■ Other Features
・Human vs Computer, Human vs Human(sharing a single device)
・3 types of board size (9x9,13x13,19x19)
・Handicap games, variable options of komi
・Hint (suggest)
・Instant Undo (available even when the computer is thinking)
・Automatic territory calculation
・Suspend/Re-start (in game)
・Save/Load game record
・Send game record (sgf-file) by e-mail
・Automatic and manual replay of a game record
・Byoyomi(time limit) settings (only for human)
・Atari warning
・Highlight the last move
・COM resign feature

※In medal challenge mode, some features related with game record and hints are not available.
Also Undo is limited to the recent move you made (2 consecutive Undos can not be made).

■ Subscription Details
-Monthly Subscription for unlimited Engine Server Games ($2.99/month).
-Customers will be charged $2.99 per month to iTunes Account after the free trial period of 7 days.
-The Subscription will be renewed automatically unless cancelled more than 24 hours before the end of it's current period.
-Account will be charged for renewal within 24-hours prior to the end