Kaarle Sakari Ojanen (4 December 1918 – 9 January 2009) was a Finnish chess player.
He was perhaps best known for defeating world championship candidate, grandmaster Paul Keres, at Helsinki, 1960.
Ojanen won the first board individual bronze medal at Havana 1966.
[3] In international play, he placed fourth at Oslo 1939, third of ten at Helsinki 1946, and seventeenth at Trenčianske Teplice 1949.
Ojanen's unusually long chess career allowed him to meet nearly all of the important master players in Finland, and his insights concerning Modern Benoni and King's Indian positions still hold value in the contemporary game.