Question

Is there a checker for forgotten cache challenges, as GC3D7D9?

Answer 1

Alas challenge checkers are based on your finds, and the finds of others are not available in the query. Thus a challenge checker cannot determine the length of time between finds.

Sorry, you'll have to test for the the old way!

Answer 2

If you don't want to search your previous finds for a suitable cache, you can look for caches which haven't been found for a long time and then go and get them.

Just create a list of all unfound caches in a certain region and sort it by last found date.

Answer 3

You can use the days since last found http://project-gc.com/Statistics/DaysSinceLastFound search to locate forgotten caches - don't forget to add a filter to remove archived caches.