[GeeTwo]

The Q&A response:

Originally Posted by Q752

• Q. Asked for some folks on Chief Delphi: Robot RedA, carrying boulderA, begins crossing a defense into the blue courtyard, and becomes stuck. Robot RedB, carrying a boulderB, crosses the same defense, pushing robot RedA and boulderA to complete their crossing in the process. For purposes of G41, did RedA or RedB cause boulderA to cross from the neutral zone to the courtyard? That is, is RedB charged a foul for causing both boulderA and boulderB to transfer with a single crossing?
• A. A ROBOT that causes an ALLIANCE partner controlling a BOULDER to complete a CROSSING has not caused the ALLIANCE partner's BOULDER to move in to the opponent's COURTYARD (the ALLIANCE partner has). A ROBOT that is controlling a BOULDER (e.g. carrying it) and pushing a ROBOT that is also controlling a BOULDER (e.g. carrying it) is not controlling two BOULDERS and thus not violating G38. Finally, there is no requirement that a ROBOT complete its crossing under its own power.

That "finally" is a bit more than I expected, but it will make the referee's jobs a bit easier. The bottom line is that if a robot controls a boulder, and another robot moves the first robot, the control of the boulder is not transitive back to the pushing robot.