Offline tournament "Evil Lands".

A replay is unlikely, because in the first Heroes game, combat is a matter of chance, so you can lose with 20 Druids, even though you won with just 2 before.
It's not certain that you even need to take Fortresses (maybe they'll surrender on their own) :)

I think it's approximately possible, starting from one of the leader's saves. And of course, someone replaying, knowing that the battle was won before, will also save-scum and, one way or another, achieve victory in the necessary battles, having a description of the main points of the playthrough.

Added 10 minutes ago

Ah, in my final playthrough, no one came to me :(, but if they had, I could have finished a week earlier!
I'd replay it, but I already sent the save file.
A good idea comes to mind later.

Exactly :) Someone came to me on the 7th day, I think. I found that save and am now working on a second playthrough, and I've put the first one aside. With the boat, I can attack Red, Blue, and Yellow strategically. I've come to the conclusion that attacking Yellow early on is strategically disadvantageous. This Fortress ends up between two fires and is then attacked from two sides by Red and Blue. You can hold out, but development is slowed down due to the constant defense of this Fortress.

Added 3 minutes ago

Well, if you put it that way, I didn't have to chase after the Heroes either...
Prorock.

Yes, you yourself wrote earlier that it's enough to leave the Fortress, and enemy heroes will flock like flies to honey :) I hope to keep my heroes safe, if I'm lucky.