Hehe, or also "map your home as you moved into it as newlyweds" and then "map your home as it appeared two months later".

But really, even in the "merged" version, I didn't intended to suggest a double map (a "before" and "after" map) but rather I would allow people to choose between an utopia and a dystopia.

A "before" and "after" map, though, seems to me it could be a good idea for a different challenge.