Just a note to say this has been added due to the fact that despite looking like a challenge cache -
it is not - the CO does state this is not a challenge cache on the cache page and despite having challenge in the title, the attribute and the checker - this was due to the fact that this was submitted as a challenge but refused - and resubmitted as a puzzle cache - but with little about the challenge aspect removed.
To many glancing over this one would percieve this as a challenge. Don't be fooled :-)