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 * [[image:180px-WTC_Amsterdam-1-.jpg link="https://en.wikipedia.org/wiki/File:WTC_Amsterdam-1-.jpg"]] ||~  || **The Fifth World Microcomputer Chess Championship** took place from September 7-15, 1985, at the [|World Trade Center] located at the [|Zuidas] in [|Amsterdam], the [|Netherlands]. Despite a field of 16 chess computers in the commercial group, there were six participants with up to three entries each. A 32-bit version of Richard Lang's Mephisto Amsterdam won conveniently, followed by two 16-bit versions of the same program . Additionaly, there was an amateur group with five participants. The title of the //Amateur World Microcomputer Chess Champion// was confidently won by Frans Morsch's program Nona with a 100% score. ||
 * [|WTC], [|Amsterdam] ||~  ||^   ||

Commercial
5th World Microcomputer Chess Championship, September 1985, Amsterdam, The Netherlands
 * ~ # ||~ Program ||~ CC ||~ Processor ||~ 1 ||~ 2 ||~ 3 ||~ 4 ||~ 5 ||~ 6 ||~ 7 ||~ 8 ||~ P ||~ SOS ||~ SoDOS ||
 * ~ 1 ||< Mephisto A'dam 1 ||~ GB ||= 68020 ||> 12w1 ||> 8b1 ||> 7b1 ||> 11w1 ||> 4w1 ||> 6b1 ||> 9b1 ||> 5w1 ||~ 8 ||= 29 ||= 29 ||
 * ~ 2 ||< Mephisto A'dam 3 ||~ GB ||= 68000 ||> 6b1 ||> 11w0 ||> 13b1 ||> 10w1 ||> 14w1 ||> 4b1 ||> 7w1 ||> 12b1 ||~ 7 ||= 27½ ||= 24½ ||
 * ~ 3 ||< Mephisto A'dam 2 ||~ GB ||= 68000 ||> 4w1 ||> 13w1 ||> 11b½ ||> 14b1 ||> 5w1 ||> 7b1 ||> 12w1 ||> 8b½ ||~ 7 ||= 27½ ||= 24¼ ||
 * ~ 4 ||< Princhess 6 ||~ SE ||= 6502 ||> 3b0 ||> 16b½ ||> 15w1 ||> 8w1 ||> 1b0 ||> 2w0 ||> 14b1 ||> 13w1 ||~ 4½ ||= 35 ||= 12½ ||
 * ~ 5 ||< Blitz Monster Y ||~ US ||= 6502 ||> 10w½ ||> 9b½ ||> 8w½ ||> 7b½ ||> 3b0 ||> 14w1 ||> 6w1 ||> 1b0 ||~ 4 ||= 36 ||= 14 ||
 * ~ 6 ||< Plymate Y ||~ SE ||= 6502 ||> 2w0 ||> 15b½ ||> 16w1 ||> 9b½ ||> 10w1 ||> 1w0 ||> 5b0 ||> 11w1 ||~ 4 ||= 32½ ||= 10½ ||
 * ~ 7 ||< Plymate Z ||~ SE ||= 6502 ||> 9w½ ||> 10b1 ||> 1w0 ||> 5w½ ||> 11b1 ||> 3w0 ||> 2b0 ||> 15w½ ||~ 3½ ||= 38½ ||= 11½ ||
 * ~ 8 ||< Orwell Y ||~ DE ||= 68020 ||> 14w1 ||> 1w0 ||> 5b½ ||> 4b0 ||> 13w0 ||> 15b½ ||> 16b1 ||> 3w½ ||~ 3½ ||= 33 ||= 10¾ ||
 * ~ 9 ||< Orwell X ||~ DE ||= 68020 ||> 7b½ ||> 5w½ ||> 14b0 ||> 6w½ ||> 15w1 ||> 13b½ ||> 1w0 ||> 10b½ ||~ 3½ ||= 31½ ||= 11½ ||
 * ~ 10 ||< Turbostar K ||~ US ||= 6502 ||> 5b½ ||> 7w0 ||> 12w1 ||> 2b0 ||> 6b0 ||> 16w1 ||> 13b½ ||> 9w½ ||~ 3½ ||= 29 ||= 9¼ ||
 * ~ 11 ||< Orwell Z ||~ DE ||= 68020 ||> 16w1 ||> 2b1 ||> 3w½ ||> 1b0 ||> 7w0 ||> 12b0 ||> 15w½ ||> 6b0 ||~ 3 ||= 36 ||= 12¾ ||
 * ~ 12 ||< Plymate X ||~ SE ||= 6502 ||> 1b0 ||> 14w0 ||> 10b0 ||> 13w1 ||> 16b1 ||> 11w1 ||> 3b0 ||> 2w0 ||~ 3 ||= 35½ ||= 7 ||
 * ~ 13 ||< Blitz Monster C ||~ US ||= 6502 ||> 15w1 ||> 3b0 ||> 2w0 ||> 12b0 ||> 8b1 ||> 9w½ ||> 10w½ ||> 4b0 ||~ 3 ||= 34½ ||= 9½ ||
 * ~ 14 ||< Turbostar 440 ||~ US ||= 6502 ||> 8b0 ||> 12b1 ||> 9w1 ||> 3w0 ||> 2b0 ||> 5b0 ||> 4w0 ||> 16w1 ||~ 3 ||= 33½ ||= 7½ ||
 * ~ 15 ||< Turbostar G ||~ US ||= 6502 ||> 13b0 ||> 6w½ ||> 4b0 ||> 16w½ ||> 9b0 ||> 8w½ ||> 11b½ ||> 7b½ ||~ 2½ ||= 26 ||= 7½ ||
 * ~ 16 ||< Blitz Monster X ||~ US ||= 6502 ||> 11b0 ||> 4w½ ||> 6b0 ||> 15b½ ||> 12w0 ||> 10b0 ||> 8w0 ||> 14b0 ||~ 1 ||= 27 ||= 3½ ||
 * [|CC Country Codes]
 * SOS: [|Sum of Opponent Scores]
 * SoDOS: [|Sum of Defeated Opponent Scores]

Amateurs

 * ~ # ||~ Program ||~ CC ||~ Hardware ||~ 1 ||~ 2 ||~ 3 ||~ 4 ||~ 5 ||~ 6 ||~ 7 ||~ P ||~ SOS ||~ SoDOS ||~ G ||
 * ~ 1 ||< Nona ||~ NL ||= Apple II ||> 3w1 ||> 5b1 ||> 2w1 ||> 4b1 ||> 3b1 ||> 2b1 ||> 4w1 ||~ 7 ||= 18 ||= 18 ||> 7 ||
 * ~ 2 ||< Rebel ||~ NL ||=  ||> 4w1 ||> 3b½ ||> 5w1 ||> 1b0 ||> 4b½ ||> 1w0 ||> 3w1 ||~ 4 ||= 24 ||= 7½ ||> 7 ||
 * ~ 3 ||< Tumult ||~ RO ||= Apple II ||> 1b0 ||> 2w½ ||> 4b1 ||> 5w1 ||> 1w0 ||> 4w1 ||> 2b0 ||~ 3½ ||= 25 ||= 5 ||> 7 ||
 * ~ 4 ||< Kempelen ||~ HU ||= Commodore 128 ||> 2b0 ||> 3w0 ||> 5b1 ||> 1w0 ||> 2w½ ||> 3b0 ||> 1b0 ||~ 1½ ||= 29 ||= 2 ||> 7 ||
 * ~ 5 ||< PK83 ||~ NL ||= [|Dec Professional 380] ||> 1w0 ||> 2b0 ||> 4w0 ||> 3b0 ||>  ||>   ||>   ||~ 0 ||= 16 ||= 0 ||> 4 ||
 * [|CC Country Codes]
 * SOS: [|Sum of Opponent Scores]
 * SoDOS: [|Sum of Defeated Opponent Scores]

=Participants=

Commercial

 * ~ Program ||~ CC ||~ Author(s) ||~ Company ||~ entries ||
 * Mephisto ||~ GB || Richard Lang || Hegener & Glaser ||= 3 ||
 * Princhess ||~ SE || Ulf Rathsman || Contempory Chess Computers ||= 1 ||
 * Plymate ||~ SE || Ulf Rathsman, Lars Hjörth || Systemhuset ||= 3 ||
 * Blitz Monster ||~ US || David Kittinger || Novag ||= 3 ||
 * Turbostar ||~ US || Julio Kaplan, Craig Barnes || SciSys ||= 3 ||
 * Orwell ||~ DE || Thomas Nitsche, Elmar Henne || Nitsche & Henne ||= 3 ||
 * [|CC Country Codes]

Amateurs

 * ~ Program ||~ CC ||~ Author(s) ||
 * Nona ||~ NL || Frans Morsch ||
 * Rebel ||~ NL || Ed Schröder ||
 * Tumult ||~ RO || Denis Dancanet, Lucien N. Dancanet ||
 * Kempelen ||~ HU || Attila Kovács ||
 * PK83 ||~ NL || Ard van Bergen ||
 * [|CC Country Codes]

=Special Event= During the Championship, IGM [|Gennadi Sosonko] did a simultaneous exhibition on September 12-13, from 7:15pm to 3:15am (8 hours!) against 21 participating and 10 other chess computers. Score: 25.5 - 5.5 (82.3%).

=Photos= running on a 68020 workstation ||
 * [[image:Ossi_Weiner_Manfred_Hegener_Richard_Lang_1985.jpg width="640" link="http://www.ismenio.com/mephisto.html"]] ||
 * Ossi Weiner, Manfred Hegener and Richard Lang ||
 * [[image:SosonkoSimul1985.JPG width="640"]] ||
 * [|Gennadi Sosonko] simultaneous exhibition, back of Richard Lang, operating Mephisto Amsterdam 1
 * [|Gennadi Sosonko] simultaneous exhibition, back of Richard Lang, operating Mephisto Amsterdam 1
 * [[image:HjortRathsmanLang1985.jpg width="640"]] ||
 * Lars Hjörth and Ulf Rathsman congratulate Richard Lang after decisive R 6  ||
 * Lars Hjörth and Ulf Rathsman congratulate Richard Lang after decisive R 6  ||

=Publications=
 * Sicco Kooi, Ard van Bergen (**1985**). //The 5th World Microcomputer-Chess Championship//. ICCA Journal, Vol. 8, No. 3
 * Frederic Friedel, Dieter Steinwender (**1985**). //Mephisto schlug sie alle - Fünfte Mikrocomputer-Schachweltmeisterschaft in Amsterdam//. Computerschach und Spiele, October/November 1985, [|pdf] hosted by Hein Veldhuis (German)
 * Gerhard Piel (**1985**). //[|Interview mit Manfred Hegener]//. (pdf) Erwerbsquelle: 10-1985, Zeitschrift Schachcomputer (Herausgeber Florian Piel), Edition 20, S. 6-8, Gerhard Piel: Neue Programme von neuen Programmierern. (German) hosted by Hein Veldhuis
 * [|Interview with Peter Auge] (pdf), Erwerbsquelle: 10-1985, Zeitschrift Schachcomputer (Herausgeber Florian Piel) hosted by Hein Veldhuis (German)
 * Bob Herschberg (**1986**). //The 5th World Microcomputer Chess Championship//. ICCA Journal, Vol. 9, No. 3, Review on a booklet by C. Roos and T. Sibbing, Computer Chess Foundation Amsterdam

=External Links=
 * [|5th World Microcomputer Chess Championship] from the [|ICGA Tournament Database]
 * [|Het vijfde wereldkampioenschap Microcomputer-schaak], Computerschaak, pagina 2 (Dutch)
 * [|5. WMCCC Amsterdam 1985] from [|Schachcomputer.info - Wiki] (German)

=Video= > media type="youtube" key="yCP--KPbxMQ"
 * Amsterdam 1985, (German) [|YouTube] Video

=References= =What links here?= include page="WMCCC 1985" component="backlinks" limit="100"
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