Mephisto Lyon

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|| [[image:Lyon68020.jpg link="https://www.flickr.com/photos/10261668@N05/859028734/in/album-72157600922171154/"]] ||~ || **Mephisto Lyon**,
a set of [[Dedicated Chess Computers|dedicated chess computer]] [[Module|modules]] by [[Hegener & Glaser]] for their [[Mephisto Module Systems|Mephisto module systems]] with a program by [[Richard Lang]], the successor of [[Mephisto Portorose]]. After Lang's sixth consecutive [[World Microcomputer Chess Championship]] title as member of the Mephisto team at the [[WMCCC 1990]] in [[https://en.wikipedia.org/wiki/Lyon|Lyon]], the modules were released in late 1990. Notable was the [[WMCCC 1990#DrawbyReputation|draw by reputation]] versus runner-up [[Échec|Échec 1.9]]. Already earlier in November 1990, the Lyon had its debut at [[ACM 1990]], becoming co-champion shared with [[Deep Thought]]. It further played the [[Harvard Cup 1991]] with less success, and the [[Aegon 1991]]. ||
|| Lyon 68020 <ref>[[https://www.flickr.com/photos/10261668@N05/859028734/in/album-72157600922171154/|Lyon 68020]] from [[http://www.flickr.com/photos/10261668@N05/sets/72157600922171154/|Mephisto | Photo collection]] by [[Steve Blincoe|Chewbanta]]</ref> ||~   ||^   ||
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=Improvements= 
Improvements of the Mephisto Lyon over the Portorose were due to an enhanced [[Selectivity|selective]] [[Search|search]] with narrower but deeper [[Search Tree|search trees]], the application of [[Singular Extensions|singular extensions]], and [[Capture Extensions|capture extensions]] if entering the [[Pawn Endgame|pawn endgame]]. Further, Mephisto Lyon has more knowledge to distinguish strong versus weak [[Passed Pawn|passed pawns]], and the [[Opening Book|opening book]] was further extended to more than 100,000 moves within 13,000 variations <ref>//Mephisto Lyon 16 / 32 bit//. [[http://alain.zanchetta.free.fr/docs/mephisto/MephistoLyonDE.pdf|pdf]] hosted by [[Alain Zanchetta]]</ref>.

=Versions= 
Three Lyon versions were shipped - with [[68000]] and [[68020]] processor, and the limited edition Mephisto Lyon [[https://en.wikipedia.org/wiki/Mephisto_%28chess_computer%29#Tournament_machines|Tournament machines]] with [[68030]] processor.
||~ Processor ||~ MHz ||~ ROM [Kib] ||~ RAM [Kib] ||
|| 68000 ||> 12 ||> 128 ||> 512 ||
|| 68020 ||> 12 ||> 128 ||> 1024 ||
|| 68030 TM ||> 36 ||> 128 ||> 2048
-8192 ||

=See also= 
* [[Various Classifications#Demonology|Demonology]]
* [[WMCCC 1990#DrawbyReputation|Draw by Reputation]]
* [[Mephisto Portorose]]
* [[Mephisto Vancouver]]

=Manuals= 
* //Mephisto Lyon 16 / 32 bit//. [[http://alain.zanchetta.free.fr/docs/mephisto/MephistoLyonDE.pdf|pdf]] hosted by [[Alain Zanchetta]]

=Publications=
* [[Eric Hallsworth]] (**1991**). //The New Mephisto Lyon//. [[Selective Search]] 32, pp 17, [[http://www.chesscomputeruk.com/SS_32.pdf|pdf]] hosted by [[Mike Watters]]

=Forum Posts= 
* [[http://www.stmintz.com/ccc/index.php?id=461649|Collectors Corner: Mephisto Lyon 68000 v. Novag Star Diamond]] by Chuck, [[CCC]], November 14, 2005 » [[Novag Star Diamond]]
* [[http://www.hiarcs.net/forums/viewtopic.php?t=4693|Master chess v.s Emulated mephisto Lyon]] by Ricardo Rodulfo, [[Computer Chess Forums|Hiarcs Forum]], February 10, 2012 
* [[http://forum.computerschach.de/cgi-bin/mwf/topic_show.pl?tid=8487|Figurensatz Mephisto Lyon abzugeben]] by [[Ingo Althöfer]], [[Computer Chess Forums|CSS Forum]], August 05, 2015 (German)

=External Links=
* [[http://www.game-ai-forum.org/icga-tournaments/program.php?id=202|Mephisto's ICGA Tournaments]] (including Lyon) 
* [[http://www.365chess.com/players/Comp_Mephisto_Lyon|Comp Mephisto Lyon chess games - 365Chess.com]]
* [[http://www.chesscomputeruk.com/html/mephisto_munchen_lyon_68020.html|Mephisto Munchen Lyon 68020]] from [[http://www.chesscomputeruk.com/index.html|Chess Computer UK]] by [[Mike Watters]]
* [[http://www.chesscomputeruk.com/html/mephisto_almeria_turniermaschi.html|Mephisto Almeria Turniermaschine]] from [[http://www.chesscomputeruk.com/index.html|Chess Computer UK]] by [[Mike Watters]] » [[Mephisto Almeria]]
* [[http://www.spacious-mind.com/html/module_lyon16_bit.html|Module Lyon16 Bit]] from [[The Spacious Mind]]
* [[http://www.spacious-mind.com/html/module_lyon32_bit.html|Module Lyon32 Bit]] from [[The Spacious Mind]]
* [[http://www.minet.uni-jena.de/fakultaet/iam/personen/CA-Chessd.html|The 3-Hirn Setting and its Variants in Chess]] by [[Ingo Althöfer]]
* [[http://www.schach-computer.info/wiki/index.php/Mephisto_Lyon_68000|Mephisto Lyon 68000]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)
* [[http://www.schach-computer.info/wiki/index.php/Mephisto_Lyon_68020|Mephisto Lyon 68020]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)
* [[http://www.schach-computer.info/wiki/index.php/Mephisto_TM_Lyon|Mephisto TM Lyon]] from [[http://www.schach-computer.info/wiki/index.php/Hauptseite_En|Schachcomputer.info Wiki]] (German)
* [[http://www.schachcomputer.at/meplyon.htm|Mephisto Lyon]] from [[http://www.schachcomputer.at/index.htm|Kurt´s Schachcomputer Homepage]] by [[Kurt Kispert]] (German)
* [[http://www.utzingerk.com/vm1991/vm1991.htm|Lyon 68020 Games - vm1991.pgn]] by [[Kurt Utzinger]] (German)

=References= 
<references />
=What links here?= 
[[include page="Mephisto Lyon" component="backlinks" limit="40"]]
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