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and had appointments at [[Massachusetts Institute of Technology|MIT]], [https://de.wikipedia.org/wiki/Fraunhofer-Institut_f%C3%BCr_Intelligente_Analyse-_und_Informationssysteme Fraunhofer IAIS], [https://en.wikipedia.org/wiki/University_of_Bonn University of Bonn], and [[University of Dortmund|TU Dortmund]].
His main research interests are in [https://en.wikipedia.org/wiki/Statistical_relational_learning statistical relational learning] and [[Artificial Intelligence|artificial intelligence]], and [[Deep Learning|deep learning]].
=CrazyAra=Along with [[Johannes Fürnkranz]]at TU Darmstadt, he Kristian Kersting led the ''Deep Learning: Methods and Architectures'' course in 2018, and supported his students [[Johannes Czech]], [[Moritz Willig]] and [[Alena Beyer]] in developing the deep learning [[Chess#Variants|chess variant]] engine [[CrazyAra]], which won a five game [[Crazyhouse ]] online-match versus [https://en.wikipedia.org/wiki/Justin_Tan Justin Tan] aka JannLee with 4-1
<ref>[https://zhchess.blogspot.com/2018/12/crazyara-plays-jannlee-for-christmas.html Crazyhouse Chess: CrazyAra plays JannLee for Christmas], December 26, 2018</ref> <ref>[https://nachrichten.idw-online.de/2019/02/19/schachmatt-durch-crazyara-kuenstliche-intelligenz-schlaegt-mehrfachen-weltmeister-im-einsetzschach/ Schachmatt durch CrazyAra: Künstliche Intelligenz schlägt mehrfachen Weltmeister im Einsetzschach] by [[Kristian Kersting]], [https://en.wikipedia.org/wiki/Informationsdienst_Wissenschaft Informationsdienst Wissenschaft], February 19, 2019 (German)</ref>.
Subsequently, he supported worked with his students Johannes Czech and [[Patrick Korus]] on an improvement of [[AlphaZero|AlphaZero's]] [[Monte-Carlo Tree Search|MCTS]] / [[Christopher D. Rosin#PUCT|PUCT]] algorithm considering [[Transposition|transpositions]], optionally applied in CrazyAra.
The proposed '''Monte-Carlo Graph Search''' uses a [https://en.wikipedia.org/wiki/Directed_acyclic_graph directed acyclic graph] (DAG) rather than a [https://en.wikipedia.org/wiki/Tree_structure tree structure] <ref>[[Johannes Czech]], [[Patrick Korus]], [[Kristian Kersting]] ('''2020'''). ''Monte-Carlo Graph Search for AlphaZero''. [https://arxiv.org/abs/2012.11045 arXiv:2012.11045]</ref>.
