HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

baratorch, take a look at this save. It seems there's still a bug in quick battles.

We were playing a fun game in an alliance, and the computer attacked (Sir Mullich) and lost a quick battle against a human hero (Galtran). The human decided to replay and lost to the computer again!)))
In a normal auto-battle, the computer couldn't repeat that (win). I don't understand how it managed to fight so well in the quick battle?

So, let's load the hotseat, quick battles should be enabled, and pass the turn. We need Sir Mullich to attack (we'll wait a week for the Titan). We'll load until he attacks.
Then, next time, we'll disable quick battles and just fight in an auto-battle.

It took me 3 tries to beat him manually :D