From the begin of 1930s to the late 1940s, Ragnar Krogius was one of Finland's leading chess players. In 1932, he won the title of Finnish Chess Champion in a match against Eero Böök – 7 : 3, but lost that title a year later in a match against Birger Axel Rasmusson – 3½ : 6½.
Ragnar Krogius played for Finland in the Chess Olympiads:[1]
Ragnar Krogius played for Finland in the unofficial Chess Olympiad:[2]
