<prompt> Pedzisa mutsara unotevera: Karff akatamba mumakwikwi matatu eWorld Womens Chess Championships: 1937 Stockholm, achitamba kuPalestine ndokuisa yechitanhatu yakundwa naVera Menchik; 1939 Buenos Aires, achitamba kuU.S. ndokuisa yechishanu yakundwawo naMenchik;  <response>: 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. 