Pac-Man/Mrs. Pac-man ghost behavior · 5:18am Oct 12th, 2016
Deals without how the ghosts choose their target space.
Tactic called grouping, which is designed to keep the ghosts together to eat them easier and, perhaps more importantly, reduce your numerical disadvantage.
I thought this was interesting, especially since the ghost's targeting can be very effective and turn a 2D game into an interesting experience. Also please check here for further details.
Interesting