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a German computer scientist and Ph.D. from the [[University of Hamburg]] on [[Parallel Search|parallel game-tree search]] and [https://en.wikipedia.org/wiki/Grid_computing Grid computing] <ref>[http://www.informatik.uni-hamburg.de/TIS/index.php/de/projekte/phd-projects/79/ PhD Project of Kai Himstedt (Dipl.-Inform.)]</ref> <ref>[[Kai Himstedt]] ('''2012'''). ''[http://www.shaker.de/de/content/catalogue/index.asp?ID=8&ISBN=978-3-8440-0803-6 Optimistische verteilte Spielbaumsuche am Beispiel des Computerschachs]''. Dissertation (German)</ref>. Along with [[Ulf Lorenz]], he is principle author of [[GridChess]] and [[Cluster Toga]], cluster chess programs based on the [[:Category:Open Source Engines|open source chess programs]] [[Fruit]] by [[Fabien Letouzey]], and the Fruit derivate [[Toga]]. GridChess is the doctorate of Kai Himstedt and a cooperation between the [[Paderborn University]] and the University of Hamburg. GridChess played the [[WCCC 2007]], Cluster Toga the [[WCCC 2008]] <ref>[https://www.game-ai-forum.org/icga-tournaments/person.php?id=512 Kai Himstedt's ICGA Tournaments]</ref>. His further cluster chess projects [[GridProtector]] and [[GridGinkgo]], playing the [[PT 49]] in October 2015, and the [[WCCC 2016]], incorporate [[Raimund Heid|Raimund Heid's]] [[Protector]], and [[Frank Schneider|Frank Schneider's]] [[Ginkgo]] respectively.