A favorite of mine; back when I frequented a lot of software conventions I would bring my set and those odd, colorful pyramids would always draw some attention.
You can tell the difference between developers who play this game, as opposed to more "ordinary" people in that they approach the game differently. Developers come up with rules like "The sum of the pips pointing at other pieces is even." A new player in the latter group came up with one of my favorite Koans of all time: "One piece is highest."
I once made the mistake of doing something like ‘viewed as a binary representation of a number, where pyramids on their side are zeros and those standing are ones, such that the number is odd.”
After that my friends wouldn’t play Zendo with me.
With the "functionally equivalent" rule (i.e. if the wording is different, but the Master can't find a counterexample, the guess is correct) this might not be too hard to find.
You can tell the difference between developers who play this game, as opposed to more "ordinary" people in that they approach the game differently. Developers come up with rules like "The sum of the pips pointing at other pieces is even." A new player in the latter group came up with one of my favorite Koans of all time: "One piece is highest."