I found a great challenge in my area, and it even already has a challenge checker.
I wondered if i could create a tool, similar to the tool to plan a route of all the missing D/T so that i can plan a route of the missing parts of that challenge and finish it.
Here is the D/T tool i refer too : http://project-gc.com/Tools/MapMatrix
Here is the challenge checker i am thinking about : http://project-gc.com/Challenges/GC44YPJ/293
Basically, i need to filter the caches by cache owner first letter and compare with the result of the challenge checker to only get the one's i'm missing.
Any idea where to begin with that?