[EricH]

Originally Posted by Nigel

what better way to get in their way then to push them against a wall long enough for someone to steal their ball?

Block their shot.
Hit them as they line up to take the shot.
Block them as they come out of the tunnel.
Get the ball before they do.
Keep them from entering the zone with the balls.
I'm sure some other folks around here can think of more.

Also remember: Drive power != pushing power. If your wheels slip, then you're not going to get any more power out of that drivetrain, no matter how many or what type of motors you have aboard.