Outlaw 4!

Everything is allowed except for obvious bugs (like there being no hero city or a situation where you simply can't move anywhere. Also, you can't use the bug with digging up the Grail.

That is, re-rolls, killing the opponent on day 111 through flying and imprisonment, and so on will be considered a victory.

You were spot on. We encountered a bug where a player was stuck in a Castle on day 112, but we hesitated and put the save aside for now, but now everything is clear.

We also encountered a bug where there was no way to leave. The starting city was in the forest, and there was no way to exit, not even a single free cell. We decided that in such cases, it would be an automatic restart, without any subjective loss, as with having 3 Castles.

Added 24 minutes ago

2. A mandatory final battle on neutral territory on day 347 if the game has dragged on to that point.
Let's discuss.

Regarding the final battle, it makes sense, but it's not very clear. So, both players have to arrive at the designated area on day 347?
1) And who attacks first?
2) What if one player doesn't make it to the designated area by day 347? For example, they are stuck in a blocked-off area, and there are no direct routes. Is that an automatic loss?
3) What if there is no designated area on the map? Any terrain gives the player bonuses, which can be decisive. Or there are 4 designated areas. One area might be more convenient for one player, and another for the other.
4) Let's say the red player played as a Logistician, spent 4 months running around, stealing cities and troops, and sleeping in Castles where he couldn't be defeated, while the blue player, in that time, developed 3 heroes and, since the troops of all factions can't be combined into one hero, deployed all 3 heroes to the designated area. Does the red player get to choose who to have the final battle with? Or does the red player have 3 heroes and the blue player has 3 heroes, and all the troops are divided among them, and it's not profitable for anyone to attack in the Castles, so how do you conduct the final battle?

In offline tournaments, I don't know how it is now, but before, the battle was conducted between 2 optimal heroes, chosen by the players, based on their status on a specific day. The heroes were "extracted" from the saves and placed in the arena