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an early chess program written in [[APL]] by [[Charlie Wilkes]] from [https://en.wikipedia.org/wiki/The_College_of_William_%26_Mary The College of William & Mary] and his father and IBM-employee [[Charles F. Wilkes]], who were inspired by the [https[:Category://enGeorge R.wikipediaR.org/wiki/George_R._R._Martin Martin|George R. R. Martin]] essay ''[[CCCP (US)#TheComputerWasAFish|The Computer Was A Fish]]'' in [https://en.wikipedia.org/wiki/Analog_Science_Fiction_and_Fact Analog Science Fiction and Fact], August 1972 <ref>[https[:Category://enGeorge R.wikipediaR.org/wiki/George_R._R._Martin Martin|George R. R. Martin]] ('''1972'''). ''[[CCCP (US)#TheComputerWasAFish|The Computer Was A Fish]]''. [http://www.isfdb.org/cgi-bin/pl.cgi?57064 Analog Science Fiction/Science Fact, August 1972]</ref> concerning the early [[ACM 1971|ACM Tournaments]]. They soon started to write an own chess program, without knowledge of how others had to that point programmed. They invented their own equivalent to [[Alpha-Beta|alpha-beta]] pruning. The Fox was a [[Claude Shannon|Shannon Type B]] program, were one may alter [[Depth|depth]] and width. In tournament mode, it made all possible [[Moves|moves]] for the first two [[Ply|plies]], it then [[Evaluation|evaluated]] and [[Pruning|pruned]] to the best three apparent moves for three more plies, for a total depth of five plies. The Fox went wider at the second ply level in case of loss of [[Material|material]] <ref>[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6d6b8e Computer Chess Newsletter, Issue 2] 1977 by [[Douglas Penrod]], [[Charles F. Wilkes]] pp. 6-9, Courtesy of [[Peter Jennings]], [http://archive.computerhistory.org/projects/chess/related_materials/text/4-0.Issue_2_Computer_Chess_Newsletter/Issue_2_Computer_Chess_Newsletter.1977.062303031.sm.pdf pdf reprint] from [[The Computer History Museum]]</ref>.

* [[Videos#TheSweet:Category:The Sweet|The Sweet]] - [https://en.wikipedia.org/wiki/Fox_on_the_Run_(Sweet_song) Fox On The Run], Promo Clip 1975, [https://en.wikipedia.org/wiki/YouTube YouTube] Video