In the game under Help is the Changes file. The part relevant to Extreme Fog of War Option addition is such:
* Added the Extreme Fog of War optional rule. When Extreme Fog of War is in effect, the Visibility highlight only displays from friendly occupied hexes. Also, for enemy units in obscuring terrain (e.g., Forest), enemy force counts will only display as XXX instead of, for example, 3XX.
I like it .... and dislike it.

There were times when I would look and look for just that special Hex that I could park someone on to view the battlefield. A person can still find what they believe will be a good spot but until they get there it is an unknown. I do find however that I am more diligent about moving a unit hex by hex. I watch the visible hexes as the point unit moves along. It really ticks me off when I am sneaking around and then find myself on a hex that burps a visible line onto an enemy unit which can spoil the surprise.
The more worrisome aspect in my mind are the instances of the unknown for Melee purposes. Let's say a stack of three units of XXX. So what size stack are they......300 or maybe a 1000. Only one way to find out. The more I am playing with it the more I am liking it.
I like the fog of war. At my age the mind is a little foggy anyway
