Hello and thanks for the Checker. I like the matrix view more but I have to see how the Checker has to be changed as I can't find anyone fulfilling the challenge. It will probably be something like 66 of 81 combinations. But I will check and write you.
Can I suggest that although a checker can be made for the variety of options you have given - if, as you say " I can't find anyone fulfilling the challenge" you may not get this past a reviewer who may (and probably will) ask for a list of 10 local(ish) cachers who already qualify - even if you do get to the 81 grid completed position yourself not finding anyone else will pose that problem - dropping it to say 66 of 81 may go in your favour
I understand - however a challenge cache wont be published on the offchance that some more caches may get that attribute or that some more cachers may qualify even though none do at present.
Attributes are not added automatically so that won't solve your problem
This was just a word of warning - as a reviewer may (and most do) require you to provide proof that this has been achieved by other cachers - not just by you
btw - I checked and I get 66/81 :)