Example start position:
1 unit moves: The LH has gone to the rear edge and has exposed an area that it cannot see.
1 unit moves: The MF has gone to the rear edge and has exposed even more!
These were just example moves to demonstrate the issue.... I don't normally start by running away
.... well, actually sometimes I do! 
But when I noticed this in a trial game the situation was much more obvious and erroneous
