There is a Basement choice adventure that opens the ground floor if you have the amulet of extreme plot significance equipped. The spoiler for that adventure tells you how many you have in inventory (useless) but does not tell you that you do not have an amulet equipped (useful).
It would be nice if it worked like the Orcish Frathouse Blueprints choice - which tells you if you have a frilly skirt equipped - or the Felonia choice - which tells you if you have a spooky glove equipped.
Revision 11936.
I notice it says that combat rate is 100% for that location. That is not correct. Has the noncombat percentages been spaded yet for the new Giant's castle?
You can skip the noncombats: just make sure you count the number of times you encountered one and compare it to the number of turns you "clicked" on the zone.with the NC choices set to neither skip nor go to combat
Top Floor is 85% combat, according to 70 NC from 524 adventures.
I'm leaning towards 10%, with the bit over that being explained by guaranteed every 10 adventures non-combats.
I'm clearly missing an important and interesting detail. Why is every 10th adventure guaranteed to be a non-combat?