DISCUSSIONS on “Rules for online games in HoMM3 and formulas for calculating player rating.”

You can certainly go through it; the rules don't forbid it, but for completely different reasons than the ones you mentioned here.

Could you elaborate on the reasons? For example, in the mini-map, why can you go wherever you want?

On 8mm6a, I often have 3 playthroughs, and sometimes I encounter a bug along the way, which leads me to some purple area. Am I not allowed to go there just because the path is buggy?