Kammala jumla mai zuwa: Franciscus Antonius Kuijpers (an haife shi a ranar 27 ga Fabrairu 1941), dan wasan Chess ne na kasar Holland (IM) (1964), wanda ya lashe gasar Dutch Chess Championship (1963) da Chess Olympiad sau uku da kuma lambar yabo ta mutum (
1974, 1976) da kuma