I could be mistaken,
but the information below is directly from groundspeak. So I think '?' cache
means puzzle not unknown container.
I do know that
some caches have been changing recently so I think reviewers are adjusting them
as they are found. I had one of mine changed to a multi instead of traditional
just by emailing an approver. I think if you have found some that should be '?'
you could email one of the reviewers and see if it could get
corrected.
Mystery or puzzle
caches
The “catch-all” of cache types, this form of cache can
involve complicated puzzles you will first need to solve to determine the
coordinates. The only commonality of this cache type is that the
coordinates listed are not of the actual cache location but a general reference
point, such as a nearby parking location. Due to the increasing
creativity of geocaching this becomes the staging ground for new and unique
challenges.
I did set up a pocket query to grab those caches that
are designated with the '?' cache-type, which is how I obtained this
list, but it's the caches that ARE
puzzle caches but AREN'T indicated as such that are the problem.
It's usually older caches that aren't labeled as
such because back in the old days, puzzle caches weren't labeled as such and the
'?' seemed to be reserved for mystery containers. These days, it seems
that '?' means puzzle much more often than it means mystery but there's no rules
about what '?' signifies.
And with the current rules for modifying caches, cache
owners can't just go in and change the cache type (like we used to) to make them
easier to find via query.
That being said, anyone know of any more puzzle caches that
aren't labeled as such?
Thanks!
LazyK - Dan