A program for calculating the strength of the guard on random maps in Heroes of Might and Magic III, called H3CalcGuards.

In one group, 2 identical objects can easily be generated.

It's not necessary – this bug is already well understood, including the specific mistake the developers made that led to it.

How is that possible? Does this mean that quest artifacts can have weak guards?

Yes. The guard for a quest always has fewer guards than the corresponding Pandora (but the relationship is not proportional).

For example, a quest artifact worth 5000 gold/experience has a value of 2000 – exactly the same as a minor artifact just lying around (the corresponding Pandoras have values of 5000 and 6000, and, for example, a quest worth 10000 experience has a value of 5333, while a minor artifact (level 2) has a value of 5000).

In general, the value of high-level quests is often not very high, and all values can be viewed in the program.

Frequency – the probability of a pair of artifact seeds appearing? Compared to a regular artifact? That is, it is implied that they have the same value?

The object in question is the quest artifact; the Seer is then placed in a certain zone and does not affect the values. Yes, the frequency is relative; it becomes apparent when, during object generation, several objects fall within the selected value range – i.e., in the case of objects with the same value, this is almost always a pure relative frequency (excluding cases where the objects occupy a different number of cells on the map – in that case, the smaller one is generated more often), and in the case of objects with different values, it shows which object is more likely to predominate in the general value ranges.