Owari is a very simple game at it's core: grab the stones in a pit, sow them around the board. Landing in a pit with 2 or 3 will result in some points. First to 25 points, wins. The game includes a tutorial to get you through the basics.
Owari will come with 3 levels of AI difficulty that should offer up different levels of challenge to the player. The easy AI will greedily attempt to capture all that it can without much regard to defense, while the medium AI is a little more careful about leaving itself open. Finally, the hard AI will attempt to think one step ahead in order to defeat the more advanced players.