A sequential game is one among imperfect data if a player doesn't grasp precisely what actions different players took up to that time. Technically, there exists a minimum of one data set with over one node. If each data set contains precisely one node, the sport is one among excellent data. Intuitively, if it's my flip to maneuver, i could not grasp what each different player has done up to currently. Therefore, I actually have to infer from their seemingly actions and from Bayes rule that actions seemingly led to my current call.