image article_title birth_name birth_date
lionelpenrose.jpg lionel penrose
 lionel sharples penrose 11 june 1898
lionel penrose

lionel sharples penrose , frs -lrb- 11 june 1898 -- 12 may 1972 -rrb- was a british psychiatrist , medical geneticist , mathematician and chess theorist , who carried out pioneering work on the genetics of mental retardation .
