Zhen Gu zhengu@seas.ucla.edu created the working application from Java code written by Trask Stalnaker trask@worldclique.com Sidney Sackson created the game Patterns II and published A Gamut of Games NY: Castle Books, 1969, where it is described. Allen Klinger klinger@cs.ucla.edu described structural measures used by Trask Stalnaker. He worked from a from a draft paper coauthored by Allen Klinger and Nikos Salingaros salingar@sphere.math.utsa.edu .