Pedzisa mutsara unotevera: Karff akatamba mumakwikwi matatu eWorld Women's Chess Championships: 1937 Stockholm, achitamba kuPalestine ndokuisa yechitanhatu (yakundwa naVera Menchik); 1939 Buenos Aires, achitamba kuU.S. ndokuisa yechishanu (yakundwawo naMenchik);
1949 Moscow, vachitamba neU.S. (vakakunda naLyudmila Rudenko). Apo FIDE yakagadza mazita muna 1950, Mona May Karff akanga ari mumwe wevakadzi vatatu vokuAmerica kugamuchira zita reInternational Woman Master.