he game you're describing sounds like "Zendo," which is a game of inductive logic designed by Kory Heath. In Zendo, players use colored plastic pieces called "Icehouse pyramids" that come in different sizes and colors. The moderator, or "Master," creates a secret rule and builds two structures, one that follows the rule (marked with a white stone) and one that doesn't (marked with a black stone). The players, or "Students," then take turns building new structures and asking the Master if they follow the rule or not. The goal is for the Students to correctly guess the secret rule by observing the examples and counterexamples provided by the Master.