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The '''Fifth World Computer Chess Championship''' took place from June 11 to 15, [[Timeline#1986|1986]], within the scope of [https://en.wikipedia.org/wiki/Cologne_Trade_Fair Cologne Trade Fair], [https://en.wikipedia.org/wiki/Cologne Cologne], [https://en.wikipedia.org/wiki/West_Germany West Germany]. It was a tough and controversial tournament. Four programs finished with four out of five, and the winner was determined by sum of opponent scores. That is why the tournament was also decided by games from the bottom half.
The program [[Mephisto Rebell|Rebel]] on a [[6502#TK20|6502 TurboKit TK20]] @ 10 MHz <ref>''Schaetzle+Bsteh High Speed Processor System TK20 TurboKit MTK20 Multi TurboKit''. [http://www.schaakcomputers.nl/hein_veldhuis/database/files/04-1987,%20Schaetzle+Bsteh,%20TK20%20TurboKit%20und%20MTK20%20Multi%20TurboKit-1.pdf pdf] hosted by [[Hein Veldhuis]]</ref> was close to become the champion against the mainframe programs, but didn't manage to win a "won game" in the last round against [[BeBeBebe]]. The later winner, [[Cray Blitz]] lost the second round against [[Bobby]], but managed to win the last round against [[HiTech]], which had a perfect score so far. A protest by [[Hans Berliner]], suspicious by a move of Cray Blitz was declined by the arbiter after inspecting Blitz's log-files. Lucky for Cray Blitz was the [[WCCC 1986#Adjudication|adjudicated]] win against [[Schach|Schach 2.7]] <ref>[[Helmut Horacek]] ('''1986'''). ''The Fifth World Computer Chess Championship Cologne, 1986'', Research Unit for Information Science and Artificial Intelligence, [[University of Hamburg]], from [http://www.computerhistory.org/chess/full_record.php?iid=doc-434fea055cbb3 Kings Move - Welcome to the 1989 AGT World Computer Chess Championship.] pg 21, [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1989_WCCC/1989%20WCCC.062302028.sm.pdf pdf] from [[The Computer History Museum]]</ref> . Years later, [[Rex]] co-author [[Sam Sloan]] started a campaign and claimed cheating by various sides <ref>[http://groups.google.com/group/rec.games.chess.misc/browse_frm/thread/5f9e4a3c23197920#%7CCheating Cheating in the World Computer Chess Championship] by [[Sam Sloan]], [[Computer Chess Forums|rec.games.chess.misc]], March 11, 1999</ref> .
=Final Standing=
|-
! 5
| style="text-align:left;" | [[Mephisto Rebell|Rebel]]
! NL
| style="text-align:right;" | 4w1
| 1
|}
* [https://en.wikipedia.org/wiki/ISO_3166-1 CC Country Codes]
* SOS: [https://en.wikipedia.org/wiki/Buchholz_system Sum of Opponent Scores]
* SoDOS: [https://en.wikipedia.org/wiki/Neustadtl_score Sum of Defeated Opponent Scores]
| style="text-align:right;" | 2,500
|-
| style="text-align:left;" | [[Mephisto Rebell|Rebel]]
! NL
| style="text-align:left;" | [[Ed Schroder|Ed Schröder]], [[Jan Louwman]]
| style="text-align:right;" | 800
|}
* [https://en.wikipedia.org/wiki/ISO_3166-1 CC Country Codes]
=Photos & Games=
</pre>
Game and short analyze on Lichess.org : [https://en.lichess.org/R10oewMw]
===Adjudication===
Round 4, [[Schach|Schach 2.7]] - [[Cray Blitz]], [https://en.wikipedia.org/wiki/Adjudication Adjudication] by [[Michael Valvo]] with help of [https://en.wikipedia.org/wiki/Vlastimil_Hort Vlastimil Hort] after seven hours of play <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=62&round=4&id=10 Cologne 1986 - Chess - Round 4 - Game 10 (ICGA Tournaments)]</ref> <ref>[http://www.stmintz.com/ccc/index.php?id=134782 Schach 2.7 vs Cray Blitz [1986 World Computer Chess Championship]] by [[José Antônio Fabiano Mendes]], [[CCC]], October 24, 2000</ref> .
</pre>
Game and short analyze on Lichess.org : [https://en.lichess.org/q0N74AHU]
=Workshop=
A workshop under the title "[[Selectivity|Selective Search]] versus [[Brute-Force|Brute Force]]" took place during the Championship. Four lectures were published in the [[ICGA Journal|ICCA Journal]]:
'''[[World Computer Chess Championship|Up one level]]'''
[[Category:Videos]]
[[Category:WCCC]]
[[Category:1986]]
