From the end of the 1940s to the end of the 1950s, Nina Hrušková-Bělská was one of the leading Czechoslovakian women's chess players. She twice won Protectorate of Bohemia and Moravia women's chess championships (1943, 1944). Nina Hrušková-Bělská won the Czechoslovak women's chess championships five times: 1946, 1948, 1952, 1953 and 1956. In 1950, Nina Hrušková-Bělská participated at Women's World Chess Championship in Moscow where shared 12th-14th place. In 1952, she participated at Women's World Chess Championship Candidates Tournament in Moscow where ranked 13th place.