 In July/August 1937, he played on fourth board at the 7th Chess Olympiad in Stockholm (+1 –6 =4).In August/September 1939, he played as first reserve at the 8th Chess Olympiad in Buenos Aires (+3 –3 =4), as the Estonian team won the bronze medal.During World War II, Türn played in the Estonian championships, although the country was occupied by either the Soviet Union or Germany.