In Zendo, the Moderator chooses a secret rule for how the colorful geometric pieces should be positioned, then gives examples of one structure that fits that rule and another structure that does not fit that rule. Players then take turns hypothesizing what the rule might be and creating a new test structure to be marked by the Moderator as fitting or not fitting the rule. As test results come in, the new data either disproves or strengthens the players' hypotheses, until there is enough evidence to make a guess at the rule. The first person to guess correctly wins. The 40 rule cards in this box create over 200 unique rules to choose from. For 2-6 players, ages 12 and up.Game PlayZendo is an inductive logic game in which players compete to be the first to figure out a secret rule chosen by a neutral moderator. Players take turns building new structures of game pieces, each of which will be marked by the moderator as to whether they follow the rule or not. By observing the patterns of which structures follow the rule or not, and testing their guesses, players narrow down the possibilities until someone guesses the rule exactly.