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Created page with "'''Home * People * Peter Karrer''' '''Peter Karrer''', (October 7, 1955 - November 20, 2010 <ref>Information provided by MarkLefler, January 23, 2013</r..."
'''[[Main Page|Home]] * [[People]] * Peter Karrer'''
'''Peter Karrer''', (October 7, 1955 - November 20, 2010 <ref>Information provided by [[MarkLefler]], January 23, 2013</ref> )<br/>
was a Swiss computer scientist affiliated with [[ETH Zurich]] and as chess player <ref>[http://www.svwinterthur.ch/schachwoche07/ 7. Winterthurer Schachwoche 2007]</ref> member at [https://de.wikipedia.org/wiki/Schachgesellschaft_Winterthur Schachgesellschaft Winterthur] also playing in the German Chess Landesliga at chess club [https://en.wikipedia.org/wiki/Engen,_Germany Engen] <ref>[http://bsv-ergebnisdienst.de/index.php?p1=0:mm:LL6-09:10B04&saison=09 BSV Ergebnisdienst - Landesliga Region Schwarzwald/Bodensee 2009/2010 - SK Engen]</ref> <ref>[http://bsv-ergebnisdienst.de/index.php?p1=0:mm:LL6-10:10B04&saison=10 BSV Ergebnisdienst - Landesliga Region Schwarzwald/Bodensee 2010/2011 - SK Engen]</ref>.
After the [https://en.wikipedia.org/wiki/Kasparov_versus_the_World Kasparov versus the World] game in 1999, Peter Karrer constructed a specialized [[Endgame Tablebases|tablebase]] for the purpose of fully understanding the KQQKQP and KQPKQP endgames. With the aid of the tablebase, [https://en.wikipedia.org/wiki/Irina_Krush Irina Krush] and [[Kenneth Wingate Regan|Ken Regan]] were able to prove that the position after the World Team's 50th move was drawn with best play on both sides <ref>[http://www.cse.buffalo.edu/~regan/chess/K-W/ Kasparov Versus the World: The Great Internet Match]</ref> <ref>[https://en.wikipedia.org/wiki/Irina_Krush Irina Krush], [[Kenneth Wingate Regan|Ken Regan]] ('''1999'''). ''[http://www.cse.buffalo.edu/~regan/chess/K-W/KHR99i.html The Greatest Game in the History of Chess]''. A Special Report by Irina Krush, Official MSN Game Analyst, [http://www.cse.buffalo.edu/~regan/chess/K-W/KHR99ii.html part 2], [http://www.cse.buffalo.edu/~regan/chess/K-W/Q-ending.html part 3] with [http://www.chessgames.com/perl/chessplayer?pid=123710 Paul Hodges]</ref>. Both [[Garry Kasparov|Kasparov]] and the bulletin board suspected that the position was drawn, but as the further course of the game proved, no one fully understood the position at the time.
=Maximals=
Karrer has mined [[Endgame Tablebases]] to produce complete lists of <ref>[[Guy Haworth]], [[Peter Karrer]], [[John Tamplin]], [[Christoph Wirth]] ('''2001'''). ''[http://centaur.reading.ac.uk/4581/ 3-5-man chess: Maximals and mzugs]''. [[ICGA Journal#24_4|ICGA Journal, Vol. 24, No. 4]]</ref> :
* maxDTM positions and data: 1-0 and 0-1, wtm and btm,
* maxDTM and all mutual zugzwangs: three types, positions and data.
Data on percentage results, maximals and [[Zugzwang|mutual zugzwangs]] has been filed and made available on the web, as have the [[Endgame Tablebases#DTM|DTM EGTs]] <ref>[http://chess.jaet.org/endings/ Chess Archives - Endgames (DTC, DTM, DTZ, DTZ-50)] hosted by [[John Tamplin]]</ref>. Most notably was his finding of a mate in 262 in KRNKNN <ref>[http://www.xs4all.nl/~timkr/chess2/diary_3.htm OPEN CHESS DIARY 60. April 8, 2000: Play chess with God] by [https://en.wikipedia.org/wiki/Tim_Krabb%C3%A9 Tim Krabbé]</ref>.
=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf ICGA Reference Database] (pdf)</ref>
* [[Peter Karrer]] ('''2000'''). ''KQQKQP and KQPKQP≈''. [[ICGA Journal#23_2|ICGA Journal, Vol. 23, No. 2]] <ref>[https://en.wikipedia.org/wiki/Kasparov_versus_the_World Kasparov versus the World from Wikipedia]</ref>
* [[Guy Haworth]], [[Peter Karrer]], [[John Tamplin]], [[Christoph Wirth]] ('''2001'''). ''[http://centaur.reading.ac.uk/4581/ 3-5-man chess: Maximals and mzugs]''. [[ICGA Journal#24_4|ICGA Journal, Vol. 24, No. 4]]
=External Links=
* [http://www.sgwinterthur.ch/author/peter-karrer/ Peter Karrer – SG Winterthur] (German)
* [http://www.svwinterthur.ch/schachwoche07/fotoalbum/photos/view_12.html Peter Karrer (SUI, Paarungsverantwortlicher) mit Schwarz gegen den Berliner Spieler Heiko Schenkendorf (GER)] (2007)
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Chess Player]]
'''Peter Karrer''', (October 7, 1955 - November 20, 2010 <ref>Information provided by [[MarkLefler]], January 23, 2013</ref> )<br/>
was a Swiss computer scientist affiliated with [[ETH Zurich]] and as chess player <ref>[http://www.svwinterthur.ch/schachwoche07/ 7. Winterthurer Schachwoche 2007]</ref> member at [https://de.wikipedia.org/wiki/Schachgesellschaft_Winterthur Schachgesellschaft Winterthur] also playing in the German Chess Landesliga at chess club [https://en.wikipedia.org/wiki/Engen,_Germany Engen] <ref>[http://bsv-ergebnisdienst.de/index.php?p1=0:mm:LL6-09:10B04&saison=09 BSV Ergebnisdienst - Landesliga Region Schwarzwald/Bodensee 2009/2010 - SK Engen]</ref> <ref>[http://bsv-ergebnisdienst.de/index.php?p1=0:mm:LL6-10:10B04&saison=10 BSV Ergebnisdienst - Landesliga Region Schwarzwald/Bodensee 2010/2011 - SK Engen]</ref>.
After the [https://en.wikipedia.org/wiki/Kasparov_versus_the_World Kasparov versus the World] game in 1999, Peter Karrer constructed a specialized [[Endgame Tablebases|tablebase]] for the purpose of fully understanding the KQQKQP and KQPKQP endgames. With the aid of the tablebase, [https://en.wikipedia.org/wiki/Irina_Krush Irina Krush] and [[Kenneth Wingate Regan|Ken Regan]] were able to prove that the position after the World Team's 50th move was drawn with best play on both sides <ref>[http://www.cse.buffalo.edu/~regan/chess/K-W/ Kasparov Versus the World: The Great Internet Match]</ref> <ref>[https://en.wikipedia.org/wiki/Irina_Krush Irina Krush], [[Kenneth Wingate Regan|Ken Regan]] ('''1999'''). ''[http://www.cse.buffalo.edu/~regan/chess/K-W/KHR99i.html The Greatest Game in the History of Chess]''. A Special Report by Irina Krush, Official MSN Game Analyst, [http://www.cse.buffalo.edu/~regan/chess/K-W/KHR99ii.html part 2], [http://www.cse.buffalo.edu/~regan/chess/K-W/Q-ending.html part 3] with [http://www.chessgames.com/perl/chessplayer?pid=123710 Paul Hodges]</ref>. Both [[Garry Kasparov|Kasparov]] and the bulletin board suspected that the position was drawn, but as the further course of the game proved, no one fully understood the position at the time.
=Maximals=
Karrer has mined [[Endgame Tablebases]] to produce complete lists of <ref>[[Guy Haworth]], [[Peter Karrer]], [[John Tamplin]], [[Christoph Wirth]] ('''2001'''). ''[http://centaur.reading.ac.uk/4581/ 3-5-man chess: Maximals and mzugs]''. [[ICGA Journal#24_4|ICGA Journal, Vol. 24, No. 4]]</ref> :
* maxDTM positions and data: 1-0 and 0-1, wtm and btm,
* maxDTM and all mutual zugzwangs: three types, positions and data.
Data on percentage results, maximals and [[Zugzwang|mutual zugzwangs]] has been filed and made available on the web, as have the [[Endgame Tablebases#DTM|DTM EGTs]] <ref>[http://chess.jaet.org/endings/ Chess Archives - Endgames (DTC, DTM, DTZ, DTZ-50)] hosted by [[John Tamplin]]</ref>. Most notably was his finding of a mate in 262 in KRNKNN <ref>[http://www.xs4all.nl/~timkr/chess2/diary_3.htm OPEN CHESS DIARY 60. April 8, 2000: Play chess with God] by [https://en.wikipedia.org/wiki/Tim_Krabb%C3%A9 Tim Krabbé]</ref>.
=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf ICGA Reference Database] (pdf)</ref>
* [[Peter Karrer]] ('''2000'''). ''KQQKQP and KQPKQP≈''. [[ICGA Journal#23_2|ICGA Journal, Vol. 23, No. 2]] <ref>[https://en.wikipedia.org/wiki/Kasparov_versus_the_World Kasparov versus the World from Wikipedia]</ref>
* [[Guy Haworth]], [[Peter Karrer]], [[John Tamplin]], [[Christoph Wirth]] ('''2001'''). ''[http://centaur.reading.ac.uk/4581/ 3-5-man chess: Maximals and mzugs]''. [[ICGA Journal#24_4|ICGA Journal, Vol. 24, No. 4]]
=External Links=
* [http://www.sgwinterthur.ch/author/peter-karrer/ Peter Karrer – SG Winterthur] (German)
* [http://www.svwinterthur.ch/schachwoche07/fotoalbum/photos/view_12.html Peter Karrer (SUI, Paarungsverantwortlicher) mit Schwarz gegen den Berliner Spieler Heiko Schenkendorf (GER)] (2007)
=References=
<references />
'''[[People|Up one level]]'''
[[Category:Chess Player]]
