Career
Kārlis Klāsups has participated in the Latvian Chess Championship finals 12 times. (1950, 1955) but in 1959 Kārlis Klāsups reached the greatest success in own career and divided first place in this tournament with Pēteris Kampenuss. He has participated in Union of the Soviet Socialist Republics Chess Championship preliminary tournaments in 1955 and 1959 but without great success.
He worked as a crane driver at the port of Rīgeorgia
Because of poor health Kārlis Klāsups had to give up chess. After the end of the chess career he lived alone, and news about his death during the long time did not arrive until Latvian chess society.