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Until 2007, Ulf Lorenz was member of the research group of [[Burkhard Monien]] at the [[Paderborn University]], where he researched on computer chess and in particular on [[Search|search algorithms]]. He created the [[Conspiracy Number Search#PCCNS|Parallel Controlled Conspiracy Number Search]] algorithm, topic of his Ph.D. thesis <ref>[[Ulf Lorenz]] ('''2000'''). ''[http://digital.ub.uni-paderborn.de/hs/content/titleinfo/2460 Controlled Conspiracy Number Search]''. [[Paderborn University]], Dissertation, advisor [[Burkhard Monien]] (German)</ref>, also practically confirmed inside his unique chess program [[P.ConNerS]].