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=Paderborn=
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]].
==Chess Programs==
In Paderbrn, Ulf authored and co-authored various chess programs, most notably the mentioned controlled conspiracy number searcher [[P.ConNerS]], and along with [[Chrilly Donninger]], the [[FPGA]] chess entities [[BrustusBrutus]] and [[Hydra]].
* [[APIL chess]]
==IPCCC==
Further, Ulf was [[:Category:Tournament OrganizersDirector|tournament organizer]] as well participant of the International Paderborn Computer Chess Championship [[IPCCC]].
=Darmstadt=
=Selected Publications=
<ref>[http://ilk.uvt.nl/icga/journal/docs/References.pdf [ICGA Journal#RefDB|ICGA Reference Database] (pdf)]</ref> <ref>[http://www.informatik.uni-trier.de/~ley/pers/hd/l/Lorenz:Ulf dblp: Ulf Lorenz]</ref>
==1992 ...==
* [[Ulf Lorenz]], [[Valentin Rottmann]] ('''1992'''). ''The 2nd International Paderborn Computer-Chess Championship''. [[ICGA Journal#15_4|ICCA Journal, Vol. 15, No. 4]] » [[IPCCC 1992]]
* [[Ingo Althöfer]], [[Chrilly Donninger]], [[Ulf Lorenz]], [[Valentin Rottmann]] ('''1994'''). ''On Timing, Permanent Brain and Human Intervention''. [[Advances in Computer Chess 7]]
* [[Ulf Lorenz]], [[Valentin Rottmann]] ('''1994'''). ''The 4th International Paderborn Computer-Chess Championship''. [[ICGA Journal#17_4|ICCA Journal, Vol. 17, No. 4]] » [[IPCCC 1994]]
* [[Ulf Lorenz]], [[Valentin Rottmann]], [[Rainer Feldmann]], [[Peter Mysliwietz]] ('''1995'''). ''Controlled Conspiracy-Number Search.'' [[ICGA Journal#18_3|ICCA Journal, Vol. 18, No. 3]]
* [[Ulf Lorenz]] ('''1995'''). ''Report on the 13th World Microcomputer-Chess Championship''. [[ICGA Journal#18_4|ICCA Journal, Vol. 18, No. 4]] » [[WMCCC 1995]]
* [[Ulf Lorenz]] ('''2000'''). ''Controlled Conspiracy-2 Search''. Proceedings of the 17th Annual Syposium on Theoretical Aspects of Computer Science (STACS)
* [[Ulf Lorenz]] ('''2001'''). ''The 10th International Paderborn Computer-Chess Championship''. [[ICGA Journal#24_1|ICCA Journal, Vol. 24, No. 1]] » [[IPCCC 2001]]
* [[Ulf Lorenz]] ('''2002'''). ''[https://link.springer.com/chapter/10.1007/3-540-45706-2_57 Parallel Controlled Conspiracy Number Search]''. [https://dblp1.uni-trier.de/db/conf/europar/europar2002.html Euro-Par 2002], [https://en.wikipedia.org/wiki/Lecture_Notes_in_Computer_Science LNCS] 2400, [https://en.wikipedia.org/wiki/Springer_Science%2BBusiness_Media Springer]
* [[Ulf Lorenz]], [[Burkhard Monien]] ('''2002'''). ''[http://www.springerlink.com/content/f6b4wb6l63dpd0jv/ The Secret of Selective Game Tree Search, When Using Random-Error Evaluations]''. Proceedings of 19th Annual Symposium on Theoretical Aspects of Computer Science (STACS), [http://www.top-5000.nl/ps/The%20secret%20of%20selective%20earch%20when%20using%20random.pdf pdf]
* [[Ulf Lorenz]], [[Valentin Rottmann]], [[Peter Mysliwietz]] ('''2002'''). ''Algorithms for the Consistency Analysis in Scenario Projects''. Combinatorial and Global Optimization, 55-74, Series on Applied Mathematics Vol. 14
* [[Chrilly Donninger]], [[Alex Kure]], [[Ulf Lorenz]] ('''2004'''). ''Parallel Brutus: The First Distributed, FPGA Accelerated Chess Program''. [http://dl.acm.org/citation.cfm?id=645610&picked=prox IPDPS’04]
* [[Chrilly Donninger]], [[Ulf Lorenz]] ('''2004'''). ''[http://www.springerlink.com/content/hp9la9pwq0a1cmrp/ The Chess Monster Hydra]'' in . [http://www.springerlink.com/content/8grv6pu2e8hd/?p=3037c8af6a0147319f6f5a8e133083dd&pi=0 Field Programmable Logic and Application], 14th International Conference[https://en.wikipedia.org/wiki/Springer_Science%2BBusiness_Media Springer], FPL 2004, Leuven, Belgium, August 30-September 1, 2004[http://www. Proceedings, pp 927top-9325000. Springer Berlin nl/ps/ Heidelberg, ISBN 978-3-540-22989-6The%20chess%20monster%20Hydra.pdf pdf]
* [http://www2.cs.uni-paderborn.de/cs/ag-monien/PERSONAL/ELSA/ Robert Elsässer], [[Ulf Lorenz]], [[Thomas Sauerwald]] ('''2004''''). ''Agent-Based Information Handling in Large Networks''. [http://www.informatik.uni-trier.de/~ley/db/conf/mfcs/mfcs2004.html#ElsasserLS04 MFCS 2004]
* [[Chrilly Donninger]], [[Ulf Lorenz]] ('''2005'''). ''The Hydra project''. Xcell Journal, Issue 53, pp. 94–97.
* [[Chrilly Donninger]], [[Ulf Lorenz]] ('''2005'''). ''[http://link.springer.com/chapter/10.1007/11922155_1 Innovative Opening-Book Handling]''. [[Advances in Computer Games 11]], [http://www2.cs.uni-paderborn.de/cs/ag-monien/PERSONAL/FLULO/publications/icga_open_springer.pdf pdf]
* [[Thorsten Ederer]], [[Ulf Lorenz]], [[Thomas Opfer]], [[Jan Wolf]] ('''2011'''). ''[http://link.springer.com/chapter/10.1007/978-3-642-31866-5_23 Modeling Games with the Help of Quantified Integer Linear Programs]''. [[Advances in Computer Games 13]]
* [[Ulf Lorenz]], [[Thomas Opfer]], [[Jan Wolf]] ('''2013'''). ''Solution Techniques for Quantified Linear Programs and the links to Gaming''. [[CG 2013]]
* [[Michael Hartisch]], [[Thorsten Ederer]], [[Ulf Lorenz]], [[Jan Wolf]] ('''2016'''). ''Quantified Integer Programs with Polyhedral Uncertainty Set''. [[CG 2016]]
* [[Michael Hartisch]], [[Ulf Lorenz]] ('''2019'''). ''A Novel Application for Game Tree Search - Exploiting Pruning Mechanisms for Quantified Integer Programs''. [[Advances in Computer Games 16]]
==2020 ...==
* [[Ulf Lorenz]], [[Chrilly Donninger|Christian Donninger]], [[Mohammed Nasir Ali|Muhammad N. Ali]], [[Erdogan Günes]], [[Christopher Lutz]] ('''2020'''). ''Hydra: Report and technical overview''. [[ICGA Journal#42_23|ICGA Journal, Vol. 42, Nos. 2-3]]
=External Links=
[[Category:Chess Programmer|Lorenz]]
[[Category:Researcher|Lorenz]]
[[Category:Tournament Director|Lorenz]]
