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GerdIsenberg
Dec 27, 2017
**[[Home]] * [[Engines]] * Chess Challenger**
|| [[image:4-2.Sensory_Chess_Challenger.Fidelity_Electronics.1982.102633899.lg.jpg link="http://www.computerhistory.org/chess/full_record.php?iid=art-431614f446c99"]] ||~ || **Chess Challenger**, or **Fidelity Chess Challenger**,
was a series of [[Dedicated Chess Computers|dedicated chess computers]] produced and market by [[Fidelity Electronics]]. The //Chess Challenger 1// was the first commercial chess computer of its kind in [[Timeline#1976|1976]], invented by [[Sidney Samole]], with a program by [[Ron Nelson]], developed for an [[https://en.wikipedia.org/wiki/Altair_8800|Altair 8800]] Microcomputer with an [[Intel]] [[8080]] CPU. Further versions of Nelson's program run on a more advanced [[Z80]] CPU, great commercial success was the //Chess Challenger 7// <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_7|Chess Challenger 7]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)</ref> in 1979. [[Ed English]], an early game programmer affiliated with Fidelity Electronics in 1979/80, improved the [[Alpha-Beta|alpha-beta]] implementation to double the playing speed <ref>[[http://www.linkedin.com/pub/ed-english/7/413/307|Ed English | LinkedIn]]</ref>.
||
|| Sensory Chess Challenger, 1982, [[6502]] <ref>[[http://www.computerhistory.org/chess/full_record.php?iid=art-431614f446c99|Sensory Chess Challenger, 1982]] from [[The Computer History Museum]]</ref> ||~ ||^ ||
[[toc]]
=Photos =
|| [[image:CC1Proto.JPG width="640" link="http://www.ismenio.com/fidelity.html"]] ||
|| Chess Challenger Prototype, 1976, [[8080]] <ref>Chess Challenger Prototype from [[http://www.uschesstrust.com/2009/11/01/world-chess-hall-of-fame-sidney-samole-museum-to-relocate-in-2010/|World Chess Hall of Fame and Sidney Samole Chess Museum]], see [[Sidney Samole]] and [[http://www.ismenio.com/fidelity.html|Fidelity Electronics]] from [[http://www.ismenio.com/chess_computers.html|chesscomputers.org]]</ref> . ||
=Sargon becomes Challenger=
In 1980, when [[Dan Spracklen|Dan]] and [[Kathe Spracklen]] started to collaborate with Samole, a [[6502]] Version of Chess Challenger was built for a [[Sargon|Sargon III]] port. The 6502 was better suited for Sargon than [[Z80]]. Excerpt from their oral history how it went with Fidelity <ref>[[http://www.computerhistory.org/trustee/gardner-hendrie|Gardner Hendrie]] (**2005**). //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> :
|| {{So, that’s about the time we started looking at Fidelity again. We got in contact with Sid Samole, who was the President of the company, and he said, “Well, come out and see us and bring your- what you got out there and show it to us.” And so we got on a plane and flew out to Miami, and showed off our program to him. And they had their chief engineer, Ron Nelson, look at it, and they were impressed. And so they offered us a big contract, basically, to go to work for them, basically, fulltime. And we didn’t have to go to Miami. We could stay in San Diego.}}
{{They had the Chess Challenger 1, I think, out at the time, or 2, and they were looking for something better. Our program, that we brought with us, just shellacked their program. We had a little tournament there, in Miami, just a little, between us, on our- the one we brought with us. And they were impressed.}}
{{And we continued to sell both through, or Sargon, through Hayden. So Fidelity didn’t mind that. The said that’s cool. They didn’t see it as a competition with them.}} ||
==WMCCC 1980, MCC 1980==
The immediate success was the lucky win of the [[WMCCC 1980|1st World Microcomputer Chess Championship]], September 4 to 9, 1980, in London. Chess Challenger with a 6502 CPU, notably winning last three of five rounds against three of four other [[Sargon]] incarnations! While the [[ICGA]] tournament site states a Z80A CPU <ref>[[http://www.game-ai-forum.org/icga-tournaments/tournament.php?id=13|1st World Microcomputer Chess Championship - ICGA Tournaments]]</ref>, [[Kevin O’Connell]] reported the World Microcomputer Chess Champion was equipped with a [[https://en.wikipedia.org/wiki/MOS_Technology|MOS Technology]] processor, despite newest Fidelity computers were shipped with Z80/Z80A <ref>[[Kevin O’Connell]] (**1980**). //World Microcomputer Chess Championship//. [[https://en.wikipedia.org/wiki/Personal_Computer_World|Personal Computer World]], [[http://www.chesscomputeruk.com/html/publication_archive.html|November 1980]]</ref>. As further confirmed by Fidelity Electronics' Vice President [[Myron Samole]] in an [[Personal Computing#5_1|Personal Computing]] interview, the Champion Sensory Challenger, which also won the [[MCC 1980]] at September 5 to 7 in [[https://en.wikipedia.org/wiki/San_Jose,_California|San Jose, California]] had a program written around the 6502 chip <ref> [[Harry Shershow]] (**1981**). //The MyChess-CSC Confrontation at San Jose//. [[Personal Computing#5_1|Personal Computing, Vol. 5, No. 1]], pp. 79-81</ref>.
|| [[image:ChessChallengerBroschure.jpg link="http://www.flickr.com/photos/10261668@N05/859069920/sizes/l/in/photostream/"]] ||
|| German Chess Challenger brochure with [[https://en.wikipedia.org/wiki/Heinz_Haber|Prof. Heinz Haber]] endorsement <ref>[[http://www.flickr.com/photos/10261668@N05/859069920/in/photostream|Grand Master Voice 1980 Brochure | Flickr - Fotosharing]] by [[Steve Blincoe|Chewbanta]]</ref>
//Chess Challenger Sensory Voice// <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_Voice|Fidelity Chess Challenger Voice]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)</ref>, a [[Z80]] based Nelson Program as Micro Champ? <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity_CC_Sensory_Voice|Fidelity CC Sencory Voice]] was a [[Z80]] based Nelson program, and not the [[6502]] based Spracklen program which won the [[WMCCC 1980]]</ref> ||
==WCCC 1980==
The //Chess Challenger// which played the [[WCCC 1980]] end of September in Linz and finished last was presumably an older Z80 based computer with a Nelson program <ref>[[https://www.computerwoche.de/a/mikros-noch-ohne-grossmeister-format,1191318|Sargon immer noch Marktführer:: Mikros noch ohne Großmeister-Format]], [[Computerworld#Woche|Computerwoche]], November 28, 1980 (German)</ref>. Fidelity's flagship end of the 70s, with World Champion 1980 advertisement was the //Chess Challenger Sensory Voice//. The first 6502 based computer with a Spracklen program commercially available appeared in 1981 as //Champion Sensory Chess Challenger// <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity_CC_Champion|Fidelity CC Champion]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)</ref> .
==ACM 1980==
The strong third place at the [[ACM 1980]] in October was again a great success, only losing to [[Belle]] in the last round <ref>[[http://www.computerwoche.de/heftarchiv/1981/4/1185023/|"Belle" wurde auch US-Champion 1980: Frecher Schachzwerg beweist Kaltblütigkeit]], January 23, 1981, [[Computerworld#Woche|Computerwoche]] 3/1981 (German)</ref>. Description given from the ACM booklet with mentioned authors Dan and Kathe Spracklen, Ronald Nelson, [[Frank Duason]] <ref>[[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6cdeeb|The Eleventh ACM's North American Computer Chess Championship]], [[http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3.1980_11th_ACM_NACCC/The_Eleventh_ACMs_North_American_Computer_Chess_Championship.1980.062303015.sm.pdf|pdf]] from [[The Computer History Museum]]</ref>
{{This marks the first appearance in an ACM tournament for this popular machine. Chess Challenger is written in assembly language for a 6502 microprocessor. It has 20k bytes of memory and executes about 1,000,000 inst/sec. A book of about 1,000 moves is used. The program uses the [[Alpha-Beta|alpha-beta]] algorithm with [[Iterative Deepening|iterative deepening]].}}
=Name Confusion=
Using the same name at almost the same time for programs with different authors and CPU architectures caused some confusion by potential customers, not to mention tournament organizers. Accordant to their product lineup and nomination, and caused by former tournament rules, permitting multiple, but different named entries from the same author, and commercial availability of participating computers, Fidelity Electronics somehow was "forced" to continue the naming obfuscation in further tournaments, where Fidelity computers with Spracklen programs participated as [[Fidelity|Fidelity X]], Challenger-X, [[Elegance]], [[Elite]], [[Private Line]], and [[Sensory 9|Sensory]].
[[#ChallengerX]]
=Chess Challenger X=
==ACM 1986==
In 1986, at the [[ACM 1986|17th ACM North American Computer Chess Championship]], Fidelity showed up with a huge experimental, parallel machine, named //Chess Challenger X//. Authors were [[Ron Nelson]], [[Dan Spracklen]], [[Kathe Spracklen]], and [[Danny Kopec]] as [[Opening Book Authors|Book author]]. It had a [[Z80]] controller, and 16 or more [[68000]] 16-bit processors. The controller was written in [[C]], the 16 or more Spracklen programs in [[Assembly|assembler]] <ref>[[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6ca4a7|The ACM's Seventeenth North American Computer Chess Championship and The Sixth World Microcomputer Chess Championship]] from [[The Computer History Museum]], [[http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1986_17th_NACCC/1986%20NACCC.062303062.sm.pdf|pdf]]</ref>.
Chess Challenger X scored 50%, losing from [[Rebel|Recom]] and [[Belle]]. Notably, in the same tournament, another Fidelity computer programmed by the Spracklens with a Kopec book took part, as [[Fidelity|Fidelity Experimental]] with a [[68020]] processor. It did not score better in that strong field and finally placed 10th.
==ACM 1988==
At the [[ACM 1988]], the new experimental version of a [[68030]] based micro called //Chess Challenger X// showed a remarkable performance. Mentioned authors from the tournament report by [[Monroe Newborn|Monty Newborn]] and [[Danny Kopec]] <ref>[[Monroe Newborn|Monty Newborn]] and [[Danny Kopec]] (**1989**). //Results of The Nineteenth ACM North American Computer Chess Championship//, in [[http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6cb3a1|The Twentieth ACM North American Computer Chess Championship]] from [[The Computer History Museum]], [[http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1989_20th_NACCC/1989%20NACCC.062303064.sm.pdf|pdf]]</ref> were [[Dan Spracklen|Dan]] and [[Kathe Spracklen]] as well as [[Ron Nelson]]. The 32-bit program, written in 68030 [[Assembly|assembly]] language, drew [[Deep Thought]] and won versus [[Waycool]], the current World Champion [[Cray Blitz]], and [[HiTech]]. Chess Challenger X was likely the forerunner of the commercial available //Fidelity Elite Avant Garde V9// <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity_Elite_V9|Fidelity Elite Avant Garde V9]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)</ref> . One year later, at the [[WCCC 1989]] in Edmonton, a similar machine, presumably with a further developed program, played under the name [[Fidelity|Fidelity X]] and finished sixth.
=CC Clones=
* [[Cassia Chess Mate]]
* [[SC 1]]
* [[SC 2]]
=See also=
* [[Fidelity]]
* [[Fidelity Electronics]]
* [[Ron Nelson]]
* [[Sidney Samole]]
* [[Dan Spracklen]]
* [[Kathe Spracklen]]
* [[Fidelity Electronics#SpracklensAppleICE|Spracklens with Apple II ICE]]
=Publications=
==1978 ...==
* Editor (**1978**). //Black-box war//. [[Personal Computing#2_11|Personal Computing, Vol. 2, No. 11]], pp. 17, November 1978 » [[Boris]]
* Don Gerue, Russ McNeil (**1979**). //Chess Challenger-10 wins Microchess Tourney//. [[Personal Computing#3_1|Personal Computing, Vol. 3, No. 2]], pp. 63 » [[The Penrod Memorial Microchess Tournament]]
* John Larkins (**1979**). //Inside Chess Challenger//. [[Personal Computing#3_11|Personal Computing, Vol. 3, No. 11]], pp. 78
* Editor (**1979**). //Misadvantages of a Chess Traveler//. [[Personal Computing#3_12|Personal Computing, Vol. 3, No. 12]], pp. 75
==1980 ...==
* [[Sidney Samole]] (**1980**). //[[http://books.google.com/books?id=aQYEAAAAMBAJ&pg=PA69&lpg=PA69&dq=Penrod+Memorial+Computer+Chess+Tournament&source=bl&ots=vot1MjdYMk&sig=C642qqnzAXoay6eiwRF5zxSXd80&hl=en&sa=X&ei=VJOwUKbaFo6RswaR-oDgBQ&redir_esc=y#v=onepage&q&f=false|Genius Offspring]]//. [[https://en.wikipedia.org/wiki/Kiplinger%27s_Personal_Finance|Changing Times]], refers [[Personal Computing#3_2|Personal Computing, February 1979]]
* [[Evan Katz]] (**1980**). //Chess Challenger's Voice comes out of Both Sides of its Mouth//. [[Personal Computing#4_5|Personal Computing, Vol. 4, No. 5]], pp. 80
* [[Harry Shershow]] (**1981**). //The MyChess-CSC Confrontation at San Jose//. [[Personal Computing#5_1|Personal Computing, Vol. 5, No. 1]], pp. 79 » [[MCC 1980]], Interviews with [[David Kittinger]] and [[Myron Samole|Mike Samole]]
* [[John F. White]] (**1981**). //[[http://yourcomputeronline.wordpress.com/2010/12/10/survey-chess-games/|Survey-Chess Games]]//. [[Your Computer]], [[http://yourcomputeronline.wordpress.com/2010/10/31/augustseptember-1981-contents-and-editorial/|August/September 1981]]
* [[John F. White]] (**1982**). //[[http://yourcomputeronline.wordpress.com/2011/01/08/review-morphy-v-champion/|Review-Morphy V Champion]]//. [[Your Computer]], [[http://yourcomputeronline.wordpress.com/2010/12/28/january-1982-contents-and-editorial/|January 1982]]
* [[John F. White]] (**1982**). //[[http://yourcomputeronline.wordpress.com/2011/01/31/review-chess-computers/|Review-Chess Computers]]//. [[Your Computer]], [[http://yourcomputeronline.wordpress.com/2011/01/30/march-1982-contents-and-editorial/|March 1982]]
==2000 ...==
* [[Rob van Son]] (**2002**). //De schaakcomputer daagt u uit!//. [[Computerschaak]], [[http://www.schaakcomputers.nl/hein_veldhuis/database/files/02-2002,%20Computerschaak,%20Rob%20van%20Son,%20De%20schaakcomputer%20daagt%20u%20uit!.pdf|pdf]] hosted by [[Hein Veldhuis]] (Dutch)
=Forum Posts=
==1998 ...==
* [[http://www.stmintz.com/ccc/index.php?id=16606|Re: Old chess challenger 7 algorithms]] by [[Fernando Villegas]], [[CCC]], April 06, 1998
* [[http://www.stmintz.com/ccc/index.php?id=16609|Something More About Chess Challenger 7]] by [[Fernando Villegas]], [[CCC]], April 06, 1998
* [[http://www.stmintz.com/ccc/index.php?id=27279|Fidelity Sensory Chess Challenger 8]] by Jim Phillips, [[CCC]], September 20, 1998
* [[http://www.stmintz.com/ccc/index.php?id=40399|Fidelity Chess Challenger 7]] by Joseph R. Coppola, [[CCC]], January 21, 1999
==2000 ...==
* [[http://www.stmintz.com/ccc/index.php?id=98719|Instruction Book For Fidelity Chess Challenger]] by John Burton, [[CCC]], February 22, 2000
* [[http://www.stmintz.com/ccc/index.php?id=216706|What was Chess Challenger 7 thinking?]] by Rich Van Gaasbeck, [[CCC]], March 06, 2002
* [[http://www.stmintz.com/ccc/index.php?id=217071|I Think I have Chess Challenger 7 search depths correctly now]] by Rich Van Gaasbeck, [[CCC]], March 08, 2002
* [[http://www.stmintz.com/ccc/index.php?id=412919|Fidelity Sensory Chess Challenger 8]] by Eric Guttenberg, [[CCC]], February 20, 2005
* [[http://www.stmintz.com/ccc/index.php?id=491677|Chess Champion Sensory Challenger Asked]] by [[Fernando Villegas]], [[CCC]], March 06, 2006
==2010 ...==
* [[http://hiarcs.net/forums/viewtopic.php?t=6465&sid=2acb53dda459ea5439587250891f8bf6|Fidelity World Champion Challenger]] by Larry, [[Computer Chess Forums|Hiarcs Forum]], December 03, 2013
* [[http://www.hiarcs.net/forums/viewtopic.php?t=7178|Ron Nelsons dedicated chess computers]] by [[Thorsten Czub|mclane]], [[Computer Chess Forums|Hiarcs Forum]], April 26, 2015
* [[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=170|Re: Ron Nelson]] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], December 29, 2015
> [[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=199|Re: Ron Nelson]] by Chessmaster Ireland, [[Computer Chess Forums|Hiarcs Forum]], January 02, 2016
> [[http://www.hiarcs.net/forums/viewtopic.php?t=6768&start=205|Re: Ron Nelson Chess Challenger 10]] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], January 24, 2016
* [[http://www.talkchess.com/forum/viewtopic.php?t=58813&start=5|Re: Ron Nelson maybe will come here...]] by [[Ron Nelson]], [[CCC]], February 03, 2016
* [[http://www.hiarcs.net/forums/viewtopic.php?t=7653|Fidelity Chess Challenger 3 Components]] by [[Ron Nelson|ChessChallenger]], [[Computer Chess Forums|Hiarcs Forum]], February 03, 2016
=External Links=
* [[http://www.game-ai-forum.org/icga-tournaments/program.php?id=427|Challenger's ICGA Tournaments]]
* [[http://www.ismenio.com/fidelity.html|Fidelity Electronics]] from [[http://www.ismenio.com/chess_computers.html|chesscomputers.org]]
* [[http://www.spacious-mind.com/html/champion_sensory_challenger.html|Fidelity Champion Sensory Challenger Electronic Chess Computer]] from [[The Spacious Mind]]
* [[http://adamsccpages.blogspot.de/2012/05/fidelity-chess-challenger-1.html|Fidelity Chess Challenger 1]] from [[Adam Hair|Adam's]] [[http://adamsccpages.blogspot.de/|Computer Chess Pages]], May 30, 2012
* [[http://www.schach-computer.info/wiki/index.php/Fidelity|Fidelity]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)
* [[https://www.computerwoche.de/a/mikros-noch-ohne-grossmeister-format,1191318|Sargon immer noch Marktführer:: Mikros noch ohne Großmeister-Format]], [[Computerworld#Woche|Computerwoche]], November 28, 1980 (German) » [[WCCC 1980]], [[WMCCC 1980]]
==Chess Challenger Voices==
hosted by [[http://www.xs4all.nl/%7Etluif/|Tom Luif]]
* [[http://tluif.home.xs4all.nl/chescom/EngCCVVEn.html|English]]
* [[http://tluif.home.xs4all.nl/chescom/EngCCVVFr.html|French]]
* [[http://tluif.home.xs4all.nl/chescom/EngCCVVDu.html|German]]
==Editions==
||~ Year ||~ Product Link(s) <ref>[[http://www.schach-computer.info/wiki/index.php/Fidelity|Fidelity]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)</ref> <ref>[[http://www.chesscomputeruk.com/index.html|Chess Computer UK]] by [[Mike Watters]]</ref> ||~ Author(s) ||~ Processor ||~ Tournaments ||
|| 1977 || [[http://www.ismenio.com/chess_cc1.html|Fidelity Chess Challenger 1]]
[[http://www.chesscomputeruk.com/html/fidelity_chess_challenger__cc1.html|Fidelity Chess Challenger (CC1)]]
[[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_1|Fidelity Chess Challenger 1]] || [[Ron Nelson]] || [[8080]] || ||
|| || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_3|Fidelity Chess Challenger 3]]
[[http://www.ismenio.com/chess_fidelity_cc3.html|Chess Challenger 3]], [[http://www.ismenio.com/chess_cc1_vs_cc3.html|CC1 vs CC3]] || [[Ron Nelson]] || [[8080]], 2 MHz || ||
|| 1978 || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_10|Fidelity Chess Challenger 10]] || [[Ron Nelson]] || [[Z80]], 4 MHz || ||
|| 1979 || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_7|Fidelity Chess Challenger 7]] || [[Ron Nelson]] || [[Z80]] || ||
|| || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_Voice|Fidelity Chess Challenger Voice]] || [[Ron Nelson]] || [[Z80]], 4 MHz || ||
|| 1980 || [[http://www.schach-computer.info/wiki/index.php/Fidelity_CC_Sensory_Voice|Fidelity Voice Sensory Chess Challenger]] || [[Ron Nelson]] || [[Z80]], 4 MHz || ||
|| || [[http://www.chesscomputeruk.com/html/fidelity_decorator_challenger.html|Fidelity Decorator Challenger]] || [[Ron Nelson]] || [[Z80]], 4 MHz || ||
|| 1981 || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Chess_Challenger_Mini_Sensory|Fidelity Chess Challenger Mini Sensory]] || [[Ron Nelson]] || [[http://www.schach-computer.info/wiki/index.php/80C50|80C50]], 6 MHz || ||
|| || [[http://www.schach-computer.info/wiki/index.php/Fidelity_CC_Champion|Fidelity Champion Sensory Chess Challenger]] || [[Dan Spracklen|Dan]] and [[Kathe Spracklen]] || [[6502]], 2 MHz || [[WMCCC 1980]], 1st ||
|| 1982 || [[http://www.schach-computer.info/wiki/index.php/Fidelity_Super_9|Fidelity Super 9 Sensory Chess Challenger]]
[[http://www.chesscomputeruk.com/html/fidelity_super_9.html|Fidelity Super 9]] || [[Dan Spracklen|Dan]] and [[Kathe Spracklen]] || [[6502]], 2 MHz || ||
|| || [[http://www.schach-computer.info/wiki/index.php/Fidelity_USCF_SE|Fidelity USCF Special Edition]]
[[http://www.chesscomputeruk.com/html/fidelity_uscf_special_edition.html|Fidelity USCF Special Edition]] || [[Dan Spracklen|Dan]] and [[Kathe Spracklen]] || [[6502]], 2.5 MHz || ||
|| 1986 || Chess Challenger X || [[Dan Spracklen|Dan]] and [[Kathe Spracklen]]
[[Ron Nelson]], [[Danny Kopec]] || [[Z80]], 16 x [[68000]] || [[ACM 1986]], 7th ||
|| 1988 || Chess Challenger X || [[Dan Spracklen|Dan]] and [[Kathe Spracklen]]
[[Ron Nelson]] || [[68030]] || [[ACM 1988]], 2nd ||
=References=
<references />
=What links here?=
[[include component="backlinks" page="Chess Challenger" limit="80" ]]
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