with the numbers I dont know how they called TRICKY... took me less than 10 minutes.
As has been said in another thread, it looks like its been 'dumbed' down for the masses.
I have always enjoyed the challenge of one that takes an hour or so. I may also try it later without the starting numbers, given a bit of time to forget the easy version.
As for the FIENDISH...harder please, my poor pencil is feeling left out