Lim Kok Ann (simplified Chinese: 林国安; traditional Chinese: 林國安; pinyin: Lín Guó'ān) (27 January 1920 – 8 March 2003) was a Singaporean chess player and organizer, and a microbiologist specializing in enterovirus research.
Born 27 January 1920,[1] Lim had been a student at Anglo-Chinese School and Raffles Institution in 1936 and in 1938 was a Queen's scholar.
[3] In 1959, while working for the World Health Organization in Houston, Texas,[1] he developed the Lim-Benyesh-Melnick (LBM) protocol for serotyping human enterovirus isolates.
[6] In August 1965, Lim was appointed as the dean of the medical faculty at the University of Singapore,[3] and in the 1960s he promoted acceptance of the novel Sabin polio vaccine amidst public skepticism of the new treatment.
He is remembered for modernizing the fifty move rule in the computer age[1] and creating the "Lim System" for tournament pairings.