Effective is a robot, that uses uke-ire to build its hand.

SettingsDecorator is a decorator, that could accept wins.

Tracker is a robot, tracking the hand state State is reset on a new round Use this robot as a helper struct, to implement others.

Tsumo is a Simple robot, rejecting all incomming suggest This should be a terminal decider of any robot.

Zaichik is a robot, that is gready to declare kans.