The 469 strategy is pretty effective, but it is beatable. I posted here:
http://www.chiefdelphi.com/forums/sh...1&postcount=42 basically saying that they can't do anything without soccer balls. The videos I saw were showing some pretty ineffective defending robots that could not clear the ball out of the zone.
There are some physical limitations to just how fast the trident can be used to feed the balls in. Also, a good coach will have the defense driver over there letting them know when balls are coming in. It does require a strong robot with a kicker.
The shaker strategy would have been an easy one to try at Cass Tech. It would be a good way to test out the robustness of their mechanism.
- T