My wife and i are having a rules debate on backtracking ability. When you use it, does it just allow you to turn your facing, but when you move back you must do it along the same space? Or can you turn your facing and go back along another space/direction? I know you can't add steps. But when you turn around do you have to go along the path you came from? Also, you are allowed to walk the outside perimeter path too correct? The half diamonds surrounding the main paths.