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

It's clear that they should have attacked 10-19 Marks (you can't even call that a block). They simply have much less value than pits.

It failed in the dungeon - there's a narrow passage where Marks are first, and then the next cell immediately contains the golem for the quest, meaning it's a double block there.