Short of that, play on a field with no cover lewl!
Short of going of on some sort of less than entirely amusing "wah wah wah the rules say bleah" rant, all that I can say is that the idea of facing down a stereotypical Guard army on a complete naked map sounds like an excercise in hilarity. Yes, hillarity. You wouldn't find yourself crying yourself to sleep afterwards, of course not. Excuse me now while I go find some happy thoughts to think.