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a mainframe chess program of the mid 70s by [[Gary Boos]] and [[James Mundstock]] affiliated with the [https://en.wikipedia.org/wiki/University_of_Minnesota [University of Minnesota]]. Iron Fish played the [[ACM 1975]] running on a [[CDC Cyber|CDC Cyber 74]], where it lost from [[Chute|Chute 1.2]] and [[Duchess]], and drew from [[Sortie]] and [[Ostrich]].