Hopelessly it's not possible to make the checker for this type of challenge. There is no possibility to list log of single caches. However, Imagine the situation, that someone with 10k caches want to use this checker. Every one of the 10k caches should be checked log by log, so the number of checks grows to about half of million. The time to execute the script could be several minutes (max limit of time is 30 seconds).
So, It's not possible to make checker for this cache
