Posts from terra incognita and artificial intelligence Auto-translated

Question: Does the computer truly not "see" unexplored territory, or does it initially know the map? Does it see enemy hidden units? And if the area is covered by the "Veil of Darkness," does it remember where to go to, for example, recapture a Necropolis?

Generally, the AI opponent plays fairly, at least it is always confused by the veil of darkness – this is a known fact. I can’t answer about the rest. I will only say what I know:
The AI is capable of cheating (perhaps this is not intentional, but simply an oversight in the AI algorithms): it can cast City Portal from cursed land, and it can cast Dimension Door or Fly even when it doesn’t have these spells in its spellbook, or artifacts that grant them (Angel Wings, Tome of Air Magic, Wizard’s Hat).
And I also noticed in battle that the AI enemy always knows in advance what artifacts the hero has that are used in the battle (worn or inserted into the appropriate slots, and not just lying in the backpack), and, accordingly, does not use those spells that could harm it (unfortunately, I can’t remember a specific case, but this definitely happened).
Everything else that is not obvious can be verified in practice.

Is it confusing? I mean, let's say a Necromancer has been developing his castle throughout the game, and then I conquer it – will he not even think to look for it in the center of the dark cloud, even in a critical situation for him?

Apparently, it works like this: the AI "forgets" everything it has seen before as soon as the Veil conceals it. Therefore, "activating" the Veil (both in the city and "in the open field") is a very effective tactic against an enemy, especially if it is (currently) stronger.

Indeed, at that point, the veil is very effective, and even more so in a city – each turn it further obscures the return path. However, when the AI has no cities left, they are drawn to them like magnets, and at that point, it almost doesn't matter whether they can see them or not; they choose the shortest path and don't get distracted by minor details.

Additionally, the AI can split/merge troops even after an attack has been initiated (meaning that when the battlefield is generated, the troops can be divided based on the strength of the attacking army). It behaves like neutral units on the map. This tactic is, of course, not available to the human player.

Indeed, at that time, the Veil is very effective, and even more so in a city - each turn it also darkens the return path. However, when the AI has no cities left, they are drawn to them like magnets, and then it seems that it doesn't matter whether they see them or not; they choose the shortest path and don't get distracted by minor things.

Of course, they just run along the road; that's the whole logic.