https://www.chessprogramming.org/index.php?title=L%27Excentrique&feed=atom&action=history
L'Excentrique - Revision history
2024-03-28T11:13:53Z
Revision history for this page on the wiki
MediaWiki 1.30.1
https://www.chessprogramming.org/index.php?title=L%27Excentrique&diff=18628&oldid=prev
GerdIsenberg at 13:32, 2 April 2020
2020-04-02T13:32:33Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 13:32, 2 April 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l10" >Line 10:</td>
<td colspan="2" class="diff-lineno">Line 10:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Photos=  </div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Photos=  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[FILE:3-1.L'ecentrique.ACM_NACCC_10.Detriot.1979.102645375.NEWBORN.lg.jpg|none|border|text-bottom|640px|link=<del class="diffchange diffchange-inline">http</del>://<del class="diffchange diffchange-inline">archive</del>.computerhistory.org/<del class="diffchange diffchange-inline">resources</del>/<del class="diffchange diffchange-inline">still</del>-<del class="diffchange diffchange-inline">image/Chess_temporary/still-image</del>/]]  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[FILE:3-1.L'ecentrique.ACM_NACCC_10.Detriot.1979.102645375.NEWBORN.lg.jpg|none|border|text-bottom|640px|link=<ins class="diffchange diffchange-inline">https</ins>://<ins class="diffchange diffchange-inline">www</ins>.computerhistory.org/<ins class="diffchange diffchange-inline">chess</ins>/<ins class="diffchange diffchange-inline">stl</ins>-<ins class="diffchange diffchange-inline">430b9bbe22237</ins>/]]  </div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Claude Jarry]] with [[L'Excentrique]], [[ACM 1979]] <ref>[<del class="diffchange diffchange-inline">http</del>://<del class="diffchange diffchange-inline">archive</del>.computerhistory.org/<del class="diffchange diffchange-inline">resources</del>/<del class="diffchange diffchange-inline">still</del>-<del class="diffchange diffchange-inline">image</del>/<del class="diffchange diffchange-inline">Chess_temporary/still-image/ Photos</del>] gifts by [[Monroe Newborn]] <del class="diffchange diffchange-inline">from </del>[[The Computer History Museum]]</ref>  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Claude Jarry]] with [[L'Excentrique]], [[ACM 1979]] <ref>[<ins class="diffchange diffchange-inline">https</ins>://<ins class="diffchange diffchange-inline">www</ins>.computerhistory.org/<ins class="diffchange diffchange-inline">chess</ins>/<ins class="diffchange diffchange-inline">stl</ins>-<ins class="diffchange diffchange-inline">430b9bbe22237</ins>/ <ins class="diffchange diffchange-inline">Photo</ins>] gifts by [[Monroe Newborn]]<ins class="diffchange diffchange-inline">, </ins>[[The Computer History Museum]]</ref>  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Games=  </div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Games=  </div></td></tr>
</table>
GerdIsenberg
https://www.chessprogramming.org/index.php?title=L%27Excentrique&diff=18627&oldid=prev
GerdIsenberg at 13:27, 2 April 2020
2020-04-02T13:27:45Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 13:27, 2 April 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l4" >Line 4:</td>
<td colspan="2" class="diff-lineno">Line 4:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''L'Excentrique''',<br/></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''L'Excentrique''',<br/></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>a chess program by [[Claude Jarry]] running on [[Amdahl 470|Amdahl]] mainframe computers <ref>[[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''[http://dl.acm.org/citation.cfm?id=358817&dl=ACM&coll=DL&CFID=78577980&CFTOKEN=10389697 Computer chess at ACM 79: the tournament and the man vs. man and machine match]''. [[ACM#Communications|Communications of the ACM]], Vol. 23, Issue 1, [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79.062303018.pdf pdf] from [[The Computer History Museum]]</ref>. It incorporated [[Iterative Deepening|iterative deepening]] with two [[Ply|ply]] increments, to overcome possible inconsistencies introduced by the alternation of attacking and defensive continuations returned by successive [[Odd-Even Effect|even-odd ply]] searches <ref>[[Eric Thé]] ('''1992'''). ''[http://digitool.library.mcgill.ca/R/?func=dbin-jump-full&object_id=56753&local_base=GEN01-MCG02 An analysis of move ordering on the efficiency of alpha-beta search]''. Master's thesis, [[McGill University]], advisor [[Monroe Newborn]]</ref>. L'Excentrique participated at the [[ACM 1976]], [[ACM 1979]] and [[ACM 1981]], and the [[WCCC 1980|3rd WCCC 1980]] in [http://en.wikipedia.org/wiki/Linz Linz], where it upset reigning champion [[Chess (Program)|Chess 4.9]] in round one, becoming strong fourth only losing from [[Belle]] <ref>[[David Levy]], [[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''3rd World Computer Chess Championship''. [[ICGA Journal|ICCA Newsletter]], Vol. 3, No. 3, reprinted in [http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6c8af8 The Fourth World Computer Chess Championship] (labeled 22nd ACM), [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1983_WCCC/1983-%20WCCC.062303061.sm.pdf pdf] from [[The Computer History Museum]], [http://www.sci.brooklyn.cuny.edu/%7Ekopec/Publications/Publications/O_36_C.pdf pdf] from [[Danny Kopec]]</ref> .  </div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>a chess program by [[Claude Jarry]] running on [[Amdahl 470|Amdahl]] mainframe computers <ref>[[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''[http://dl.acm.org/citation.cfm?id=358817&dl=ACM&coll=DL&CFID=78577980&CFTOKEN=10389697 Computer chess at ACM 79: the tournament and the man vs. man and machine match]''. [[ACM#Communications|Communications of the ACM]], Vol. 23, Issue 1, [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79.062303018.pdf pdf] from [[The Computer History Museum]]</ref>. It incorporated [[Iterative Deepening|iterative deepening]] with two [[Ply|ply]] increments, to overcome possible inconsistencies introduced by the alternation of attacking and defensive continuations returned by successive [[Odd-Even Effect|even-odd ply]] searches <ref>[[Eric Thé]] ('''1992'''). ''[http://digitool.library.mcgill.ca/R/?func=dbin-jump-full&object_id=56753&local_base=GEN01-MCG02 An analysis of move ordering on the efficiency of alpha-beta search]''. Master's thesis, [[McGill University]], advisor [[Monroe Newborn]]</ref>. <ins class="diffchange diffchange-inline">Further, the program used pure [[Minimax]] for the first few iterations in order to find and save the strongest continuation for each first level move. On deeper levels, L'Excentrique employs [[Alpha-Beta|alpha-beta]]. Jarry argued that finding the strongest continuation for each first ply move on the initial few iterations results in faster searches on later iterations <ref>[[David Levy]], [[Monroe Newborn]] ('''1982, 1983'''). ''[https://link.springer.com/book/10.1007/978-3-642-85538-2 All About Chess and Computers]''. [https://en.wikipedia.org/wiki/Springer_Science%2BBusiness_Media Springer], [https://rd.springer.com/chapter/10.1007/978-3-642-85538-2_14 Postscript: 1978 – 80 and BELLE The World Champion]</ref>.</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">=Tournament Play=</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>L'Excentrique participated at the [[ACM 1976]], [[ACM 1979]] and [[ACM 1981]], and the [[WCCC 1980|3rd WCCC 1980]] in [http://en.wikipedia.org/wiki/Linz Linz], where it upset reigning champion [[Chess (Program)|Chess 4.9]] in round one, becoming strong fourth only losing from [[Belle]] <ref>[[David Levy]], [[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''3rd World Computer Chess Championship''. [[ICGA Journal|ICCA Newsletter]], Vol. 3, No. 3, reprinted in [http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6c8af8 The Fourth World Computer Chess Championship] (labeled 22nd ACM), [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1983_WCCC/1983-%20WCCC.062303061.sm.pdf pdf] from [[The Computer History Museum]], [http://www.sci.brooklyn.cuny.edu/%7Ekopec/Publications/Publications/O_36_C.pdf pdf] from [[Danny Kopec]]</ref> .  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Photos=  </div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=Photos=  </div></td></tr>
</table>
GerdIsenberg
https://www.chessprogramming.org/index.php?title=L%27Excentrique&diff=18622&oldid=prev
GerdIsenberg at 11:49, 2 April 2020
2020-04-02T11:49:45Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 11:49, 2 April 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l62" >Line 62:</td>
<td colspan="2" class="diff-lineno">Line 62:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Mainframe]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Mainframe]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Hyatt Quotes]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Hyatt Quotes]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Animation]]</ins></div></td></tr>
</table>
GerdIsenberg
https://www.chessprogramming.org/index.php?title=L%27Excentrique&diff=16080&oldid=prev
GerdIsenberg at 19:13, 8 December 2019
2019-12-08T19:13:10Z
<p></p>
<table class="diff diff-contentalign-left" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr style="vertical-align: top;" lang="en">
<td colspan="2" style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 19:13, 8 December 2019</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l59" >Line 59:</td>
<td colspan="2" class="diff-lineno">Line 59:</td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=References=  </div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=References=  </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div><references /></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;"></del></div></td><td colspan="2"> </td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''[[Engines|Up one level]]'''</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Mainframe]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Hyatt Quotes]]</ins></div></td></tr>
</table>
GerdIsenberg
https://www.chessprogramming.org/index.php?title=L%27Excentrique&diff=789&oldid=prev
GerdIsenberg: Created page with "'''Home * Engines * L'Excentrique''' FILE:Cam-disc-3 frontview animated.gif|border|right|thumb|Cam disc with tappet <ref>[https://fr.wikipedia.org/wiki/Ex..."
2018-04-22T19:21:49Z
<p>Created page with "'''<a href="/Main_Page" title="Main Page">Home</a> * <a href="/Engines" title="Engines">Engines</a> * L'Excentrique''' FILE:Cam-disc-3 frontview animated.gif|border|right|thumb|Cam disc with tappet <ref>[https://fr.wikipedia.org/wiki/Ex..."</p>
<p><b>New page</b></p><div>'''[[Main Page|Home]] * [[Engines]] * L'Excentrique'''<br />
<br />
[[FILE:Cam-disc-3 frontview animated.gif|border|right|thumb|Cam disc with tappet <ref>[https://fr.wikipedia.org/wiki/Excentrique_%28m%C3%A9canique%29 Excentrique (mécanique)]</ref> ]] <br />
<br />
'''L'Excentrique''',<br/><br />
a chess program by [[Claude Jarry]] running on [[Amdahl 470|Amdahl]] mainframe computers <ref>[[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''[http://dl.acm.org/citation.cfm?id=358817&dl=ACM&coll=DL&CFID=78577980&CFTOKEN=10389697 Computer chess at ACM 79: the tournament and the man vs. man and machine match]''. [[ACM#Communications|Communications of the ACM]], Vol. 23, Issue 1, [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79/3-1%20and%203-2%20and%203-3.Computer_chess_at_ACM_79.062303018.pdf pdf] from [[The Computer History Museum]]</ref>. It incorporated [[Iterative Deepening|iterative deepening]] with two [[Ply|ply]] increments, to overcome possible inconsistencies introduced by the alternation of attacking and defensive continuations returned by successive [[Odd-Even Effect|even-odd ply]] searches <ref>[[Eric Thé]] ('''1992'''). ''[http://digitool.library.mcgill.ca/R/?func=dbin-jump-full&object_id=56753&local_base=GEN01-MCG02 An analysis of move ordering on the efficiency of alpha-beta search]''. Master's thesis, [[McGill University]], advisor [[Monroe Newborn]]</ref>. L'Excentrique participated at the [[ACM 1976]], [[ACM 1979]] and [[ACM 1981]], and the [[WCCC 1980|3rd WCCC 1980]] in [http://en.wikipedia.org/wiki/Linz Linz], where it upset reigning champion [[Chess (Program)|Chess 4.9]] in round one, becoming strong fourth only losing from [[Belle]] <ref>[[David Levy]], [[Ben Mittman]], [[Monroe Newborn]] ('''1980'''). ''3rd World Computer Chess Championship''. [[ICGA Journal|ICCA Newsletter]], Vol. 3, No. 3, reprinted in [http://www.computerhistory.org/chess/full_record.php?iid=doc-431614f6c8af8 The Fourth World Computer Chess Championship] (labeled 22nd ACM), [http://archive.computerhistory.org/projects/chess/related_materials/text/3-1%20and%203-2%20and%203-3%20and%204-3.1983_WCCC/1983-%20WCCC.062303061.sm.pdf pdf] from [[The Computer History Museum]], [http://www.sci.brooklyn.cuny.edu/%7Ekopec/Publications/Publications/O_36_C.pdf pdf] from [[Danny Kopec]]</ref> . <br />
<br />
=Photos= <br />
[[FILE:3-1.L'ecentrique.ACM_NACCC_10.Detriot.1979.102645375.NEWBORN.lg.jpg|none|border|text-bottom|640px|link=http://archive.computerhistory.org/resources/still-image/Chess_temporary/still-image/]] <br />
[[Claude Jarry]] with [[L'Excentrique]], [[ACM 1979]] <ref>[http://archive.computerhistory.org/resources/still-image/Chess_temporary/still-image/ Photos] gifts by [[Monroe Newborn]] from [[The Computer History Museum]]</ref> <br />
<br />
=Games= <br />
[[WCCC 1980]] Round 1 <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=68&round=1&id=1 Linz 1980 - Chess - Round 1 - Game 1 (ICGA Tournaments)]</ref><br />
<pre><br />
[Event "3rd World Computer Chess Championship"]<br />
[Site "Linz, Austria"]<br />
[Date "1980.09.25"]<br />
[Round "1"]<br />
[White "L'Excentrique"]<br />
[Black "Chess 4.9"]<br />
[Result "1-0"]<br />
<br />
1.e4 e5 2.Nf3 Nf6 3.d4 Nxe4 4.Bd3 d5 5.Nxe5 Bd6 6.c4 Bxe5 7.dxe5 Nc6 8.Bc2 Nxe5<br />
9.Qxd5 Qxd5 10.cxd5 Bf5 11.O-O c6 12.f4 Ng4 13.h3 Ngf6 14.g4 Nd2 15.Re1+ Kf8<br />
16.Bd1 Bxb1 17.Bxd2 Bd3 18.Re3 Bc4 19.Bb4+ Kg8 20.d6 Nd5 21.Re4 Bd3 22.Rd4 Nxb4<br />
23.Rxb4 b6 24.Rd4 Bb5 25.a4 c5 26.Rd2 Bc6 27.a5 Rd8 28.a6 h5 29.gxh5 Rh6 30.Bg4<br />
Rhxd6 31.Rxd6 Rxd6 32.Kf2 Rd2+ 33.Ke3 Rxb2 34.Rd1 Rb3+ 35.Kf2 Be4 36.Rd8+ Kh7<br />
37.Rf8 f6 38.Rf7 Ra3 39.Rxa7 f5 40.Be2 Rxh3 41.Rd7 Rh2+ 42.Ke3 Rh1 43.Rd8 Rh3+<br />
44.Kd2 Rb3 45.Bc4 Rb4 46.Bf7 Rd4+ 47.Rxd4 cxd4 48.a7 Kh6 49.Bg6 Bg2 50.Kd3 b5<br />
51.Bxf5 g5 52.Be4 Bf1+ 53.Kxd4 Kxh5 54.f5 g4 55.a8=Q Kh4 56.Ke3 Kh3 57.Kf2 1-0<br />
</pre><br />
<br />
[[WCCC 1980]] Round 3 <ref>[https://www.game-ai-forum.org/icga-tournaments/round.php?tournament=68&round=3&id=3 Linz 1980 - Chess - Round 3 - Game 3 (ICGA Tournaments)]</ref><br />
<pre><br />
[Event "3rd World Computer Chess Championship"]<br />
[Site "Linz, Austria"]<br />
[Date "1980.09.27"]<br />
[Round "3"]<br />
[White "Belle"]<br />
[Black "l'Excentrique"]<br />
[Result "1-0"]<br />
<br />
1.e4 c6 2.d4 d5 3.Nc3 dxe4 4.Nxe4 Nd7 5.Bc4 Ndf6 6.Ng5 e6 7.Ne2 h6 8.Nf3 Bd6<br />
9.O-O b5 10.Bd3 Ne7 11.a4 bxa4 12.Rxa4 O-O 13.Be3 Ng4 14.Bf4 Bxf4 15.Nxf4 Qd6<br />
16.Nh5 g6 17.Ng3 f5 18.Qa1 a6 19.Re1 Nf6 20.Bxa6 Bxa6 21.Rxa6 Rxa6 22.Qxa6 f4<br />
23.Ne4 Nxe4 24.Rxe4 g5 25.c4 Rb8 26.c5 Qd5 27.Re2 g4 28.Qa7 Re8 29.Re5 Qd8<br />
30.Ne1 Nf5 31.Qa6 Nxd4 32.Qd3 Kg7 33.Qe4 Rf8 34.Kh1 Rf5 35.Nd3 Kf6 36.Nxf4 g3<br />
37.f3 gxh2 38.Rxe6+ Nxe6 39.Qxe6+ Kg7 40.Qxf5 Kg8 41.Qg6+ Kh8 42.Qf7 Qg5<br />
43.Ng6+ Qxg6 44.Qxg6 h5 45.f4 h4 46.f5 h3 47.f6 hxg2+ 48.Qxg2 1-0<br />
</pre><br />
<br />
=Fast Searcher= <br />
According to [[Robert Hyatt]], L'Excentrique was a fast and [[Tactics|tactical]] strong searcher <ref>[http://www.stmintz.com/ccc/index.php?id=201762 Re: Who is the better chess program author?] by [[Robert Hyatt]], [[CCC]], December 13, 2001</ref> :<br />
I remember [[Ken Thompson|Ken]] once saying "If you can just hold on and not get caught by its tactics, it will eventually 'fold' and make a horrible positional mistake and crumble away." <br />
<br />
=External Links= <br />
* [https://www.game-ai-forum.org/icga-tournaments/program.php?id=423 l'Excentrique's ICGA Tournaments]<br />
<br />
=References= <br />
<references /><br />
<br />
'''[[Engines|Up one level]]'''</div>
GerdIsenberg