There is a Master buried in my friend's back yard. His rule was 'pip count adds up to a number in the Fibonnaci (sp) Sequence.'
He was clever. WAS.
Another common newbie Master failure is obfuscation: dump a pile of pyramids, only two of which contain the BN. We call that 'muddying the waters', but it works for making a stupid-simple rule near-impossible.
Just 2¢