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a Dutch computer scientist, chess player, chess and computer chess official, tournament organizer, tournament director, chess and computer chess arbiter <ref>[http://ratings.fide.com/card.phtml?event=1037536 FIDE chess profile - Krabbenbos, Jan]</ref>, and former professional software developer at [[DGT]] <ref>[http://www.linkedin.com/in/jankrabbenbos Jan Krabbenbos | LinkedIn]</ref>. He was member of the Board of the [[CSVN]] (2005-2011) and co-organizer of the [[Dutch Open Computer Chess Championship]] and the [[International CSVN Tournament]]. More recently, Jan serves served as assistant tournament director of [[ICGA]] tournaments, the [[World Computer Chess Championship]] and the [[World Chess Software Championship]]. From December 2012 until 2014 he was the chairman of the [[CSVN]], and is currently since then still member of the board, acting as the treasurer, and since 2012 organizing the CSVN activities twice a year, including the [[CSVN Programmers Tournament|Programmers Tournament]]. Jan passed away on December 16, 2022.