Why does challenge map show checker when cache page doesn't

Question

I've noticed a number of challenge caches on the map that show they have checkers (with some showing I've met the challenge), yet when I go to the actual cache page, there is no checker.  How can this be? And, how do I find and run such a checker to gather the satisfying data?

e.g., GC4Y2RV, GC5RXP5, GC4Y2TC

Answer 1

It is perfectly possible to create a checker on Project-GC without it being linked in the HTML code on the cache page. To find these checkers, go to https://project-gc.com/Tools/Challenges and enter the GC code in the search field (and make sure that the country field is correctly set).

Also, if you use the Project-GC web browser extension (https://project-gc.com/Home/UserScript), any existing checker will be linked on the cache page even if the cache owner hasn't done that.

Comments

Thanks for the clarification. And also for the info about the Project-GC web browser extension. Got it up and running and must say I like a couple of the features.  What I like most, however, is the quickness with which Project-GC folk respond to posts regarding the functionality of the software.