The most challenging maps for you.

The most difficult ones are probably those that weren't created by unskilled hands, but by unskilled minds. For example, I open a map with 200% starting resources, and there's no hero! That is, I have to spend 5 days accumulating money to buy him! Or there's a resource-free starting area with exits blocked by powerful monsters, and I have to spend a month accumulating money to gather some kind of army of level 1-2 and break out into the open – but in that time (and even faster), you can complete the entire map.