====== Flanking ======

Position in combat matters:  A character that is surrounded is in significant trouble.

A character is said to be flanked if they have opponents on opposite sides of themselves.  If a line can be drawn from the center of one opponent's square to the center of another's, and it passes through either opposite corners or opposite edges of a square containing a character, that character is flanked.

A character that is Flanking an opponent gains favour to any melee attack roll made against that Flanked opponent.  Ranged attacks do not gain favour against a Flanked character.  A character that is not Flanking an opponent does not gain favour against that target if the target is Flanked by anyone else.