[rich2202]

I don't think boulder wars is the genesis of the G13 change. I am guessing this is more likely the problem:

Two opposing robots line up on each side of a boulder. At the start of Autonomous, One robot drives in the wrong direction, and hits the boulder, which then hits the other robot. The other robot was not going after the boulder, but was going for a cross. The other robot is now knocked off it's path and cannot complete the crossing.

Since the offending robot did not "touch" the other robot, there was not a G13 - Contact of opponent robot foul.