mips42
Adventurer
I was fairly sure but I checked and here is the verbiage:
"When a creature and at least one of its allies are adjacent to an enemy and on opposite sides or corners of the enemy's space, they flank that enemy, and each of them has advantage on melee attack rolls against that enemy"
I interpret that as you must be directly opposite the other combatant in order for Flanking to be true. So, in our current situation, I would read that as Bimpnott would need to be 10' (2 squares) south of where he is. If you interpret differently, I would listen.
"When a creature and at least one of its allies are adjacent to an enemy and on opposite sides or corners of the enemy's space, they flank that enemy, and each of them has advantage on melee attack rolls against that enemy"
I interpret that as you must be directly opposite the other combatant in order for Flanking to be true. So, in our current situation, I would read that as Bimpnott would need to be 10' (2 squares) south of where he is. If you interpret differently, I would listen.