...There are angled, colored walls that all robots move through except for the robot that matches the color of the wall. The robot that matches the color of the wall makes a ninety degree turn when it hits the angled wall. This also only counts as one move.
It's actually the opposite.
"When a robot reaches a square with a diagonal colored wall, it passes through the wall if its color matches the wall and bounces off the wall at right angles if its color does not match the wall." (p.1 of Rio Grande Edition)
Italics are mine.