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an early chess program written in [[Fortran]] by [[Gary Boos]] and [[James Mundstock]] from the [https://en.wikipedia.org/wiki/University_of_Minnesota [University of Minnesota]] on a [[CDC 6600]], which participated in the [[ACM 1971|ACM's Second North American Computer-Chess Championship]] 1971. It did not use [[Alpha-Beta|alpha-beta]], but a search based on a ''Multipurpose, Theorem-Proving Heuristic Program'' as described by [[James R. Slagle]] and [[Philip Bursky]] in 1968 <ref>[[James R. Slagle]], [[Philip Bursky]] ('''1968'''). ''Experiments With a Multipurpose, Theorem-Proving Heuristic Program''. [[ACM#Journal|Journal of the ACM]], Vol. 15, No. 1</ref> .