I like to go geocaching with a few of my friends. However, sometimes, they can't make it, and I'll go geocaching by myself. In order to not interfere with future trips with my friends, I in these cases like to find caches that one or more of them have already found but I have not found - that way, we can still go find the caches, none of us have found, together at a later date.
However, I can't seem to find a way to display these caches on project-gc.com - even using custom filters. The only way I have found so far is to make a bookmark list of all the caches, my friends have found, and use this as an ignore bookmark list in "Map Compare". But this list will quickly become out of date.
Is there a smarter way to display caches that are unfound by me but found by one or two of specifically listed profiles?