You are correct.
We managed to keep the Technokats (

) from scoring for most of the match. We simply put ourselves between the rack and their robot.
Another thing we developed was a strategy where the defending team stays between the rack and the opposing robot (opposing robot very close to a position to score). The two robots push against eachother and the defending robot quickly moves out of the way. The opposing robot doesn't expect it and drives forward at full power, thus overshooting the goal. They now need to spend some more time re-aligning.