[Doug Frisk]

I emailed Mark Lawrence yesterday a suggestion that the new defense be a 12 foot length of heavy chain encased in a vinyl tube suspended across the platform with the center of the loop 5 inches above the bottom platform.

It provides a challenge that is similar to the portcullis in that you have to lift the chain up and over the robot, but is easier in that it swings out of the way and harder in that the chain can catch on the robot as it passes under.

The vinyl/plastic cover is of course to prevent the chain from completing a circuit as it drags over your robot.