Lubomir Kavalek

Lubomir (Lubosh) Kavalek (, August 9, 1943 – January 18, 2021) was a Czech-American chess player. 
He was awarded both the International Master and International Grandmaster titles by FIDE in 1965. He won two Czechoslovak and three U.S. championships, and was ranked as the world's #10 player in 1974.
Kavalek was also a chess coach, organizer, teacher, commentator, author and award-winning columnist. He was born in Prague, Czechoslovakia.
Kavalek died on January 18, 2021 in Renton, Washington at the age of 77.