<SG7> Stats that a robot can not be in possession of more than one triball at a time. When looking at the possession definition it state the following:
Possession – A Robot / Triball status. A Robot is considered to be in Possession of a Triball if the Robot is carrying, holding, or controlling the movement of a Triball such that if the Robot changes direction, the Triball will move with the Robot. Therefore, pushing/plowing Triballs is not considered Possession; however, using concave portions of a Robot to control the movement of Triballs is considered Possession.
When looking at the portion of the definition that referring to concave portions of the robot it is our interpretation that this is aimed at horizonal concavity as that would control the movement of the triballs when the robot is turning.
Our question is would a concave shape be against SG7 if that concave shape is vertical rather than Horizontal assuming that the interface with the triballs is in no other way concave. The attached image is to provide clarity in what is meant by vertical concavity.