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an American mathematician, computer scientist and microcomputer chess pioneer. Along with her husband [[Dan Spracklen|Dan]], Kathe started chess programming in 1977 on a [[Z80|Z-80]] based ''Wavemate Jupiter III'' <ref>[http://www.computermuseum.li/Testpage/JupiterII-1975.htm Jupiter II-1975]</ref> in [[Assembly|assembly language]]. Their first program, [[Sargon]] <ref>[https://en.wikipedia.org/wiki/Sargon_%28chess%29 Sargon from Wikipedia]</ref> had a one or two [[Ply|ply]] [[Search|search]] without [[Quiescence Search|quiescence]] but [[Static Exchange Evaluation|exchange evaluation]] <ref>[http://www.andreadrian.de/schach/sargon.asm Sargon Z80 assembly listing] by [[Dan Spracklen|Dan]] and Kathe Spracklen, hosted by [[Andre Adrian]]</ref>. After the success at [[MCCT 1978|The Second West Coast Computer Faire MCCT]] in March 1978, and the shared third place at [[ACM 1978]], the Spracklens became professional computer chess programmers. Sargon II was ported to various early home computers, for instance [[TRS-80]] and [[6502]] based [[Apple II]] <ref>[http://www.c64-wiki.de/index.php/Sargon_II Sargon II] from [http://www.c64-wiki.de/index.php/Hauptseite C64-Wiki] (German)</ref>, as well as [[Dedicated Chess Computers|dedicated units]] as [[Chafitz ARB Sargon 2.5]] <ref>[http://www.schach-computer.info/wiki/index.php/Chafitz_ARB_Sargon_2.5 Chafitz ARB Sargon 2.5]</ref>.

In 1989 or 1990, soon after Samole sold Fidelity to [[Hegener & Glaser]], Kathe and Dan Spracklen started to work for [[Eric Winkler]] and [[Saitek]], and developed a program for [[Sparc]] processors. The loss of [[Kasparov Sparc]] against [[Ed Schroder|Ed Schröder's]] [[ChessMachine]] <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=58&round=5&id=7 Madrid 1992, Chess, Round 5, Game 7] from the [[ICGA]] [https://www.game-ai-forum.org/icga-tournaments/ Tournament Database]</ref> in [[WCCC 1992|Madrid 1992]], almost ended their involvement in computer chess when they didn't win that world title <ref>[http://www.computerhistory.org/trustee/gardner-hendrie Gardner Hendrie] ('''2005'''). ''[https://www.computerhistory.org/chess/orl-43343fb422232/ Oral History of Kathe and Dan Spracklen]''. [http://archive.computerhistory.org/projects/chess/related_materials/oral-history/spacklen.oral_history.2005.102630821/spracklen.oral_history_transcript.2005.102630821.pdf pdf] from [[The Computer History Museum]]</ref>.

Kathleen Spracklen on [[Donald Michie]], excerpt from ''Oral History'' <ref>[http://www.computerhistory.org/trustee/gardner-hendrie Gardner Hendrie] ('''2005'''). ''[https://www.computerhistory.org/chess/orl-43343fb422232/ Oral History of Kathe and Dan Spracklen]''. [http://archive.computerhistory.org/projects/chess/related_materials/oral-history/spacklen.oral_history.2005.102630821/spracklen.oral_history_transcript.2005.102630821.pdf pdf] from [[The Computer History Museum]]</ref>:

* [http://www.computerhistory.org/trustee/gardner-hendrie Gardner Hendrie] ('''2005'''). ''[https://www.computerhistory.org/chess/orl-43343fb422232/ Oral History of Kathe and Dan Spracklen]''. [http://archive.computerhistory.org/projects/chess/related_materials/oral-history/spacklen.oral_history.2005.102630821/spracklen.oral_history_transcript.2005.102630821.pdf pdf] and [http://www.computerhistory.org/chess/related_materials/oral-history/spacklen.oral_history.2005.102630821/index.php?iid=orl-43343fb422232 Video] from [[The Computer History Museum]]

* [http://www.computerhistory.org/chess/search.php/?more=&submitted=1&keywordsq=Spracklen&x=33&y=8&all=all&item_document=item_document&item_moving_image=item_moving_image&item_artifact=item_artifact&item_still_image=item_still_image&item_oral_history=item_oral_history&item_software=item_software# Search the Mastering the Game exhibition and on-line collection] from [[The Computer History Museum]]: * [httphttps://www.computerhistory.org/chess/related_materials/oral-history/spacklen.oral_history.2005.102630821/index.php?iid=orl-43343fb422232 / Oral History of Kathleen and Danny Spracklen], March 2, 2005 by [http://www.computerhistory.org/trustee/gardner-hendrie Gardner Hendrie], [[The Computer History Museum]]

* <span id="LadySargon"></span>[https://en.wikipedia.org/wiki/Computer_Chronicles Computer Chronicles]: [http://archive.org/details/Computer1985_6 Computer Games (1985)] from the [https://en.wikipedia.org/wiki/Internet_Archive Internet Archive], "Lady Sargon" at 4:10, also as [https://en.wikipedia.org/wiki/YouTube YouTube] Video: {{#evu:https://www.youtube.com/watch?v=7PH7ifJKJpU?t=250|alignment=left|valignment=top}}