<prompt> Ramba uchiverenga ndima ino - Karff akatamba muWorld Womens Chess Championships katatu: 1937 Stockholm, achitamba kuPalestine ndokuisa nzvimbo yechitanhatu yakahwinwa naVera Menchik; 1939 Buenos Aires, achitamba kuU.S. ndokuisa nzvimbo yechishanu yakahwinwawo naMenchik; 1949 Moscow  <response>: , achitamba neU.S. akakundwa naLyudmila Rudenko. Apo FIDE yakagadza mazita muna 1950, Mona May Karff akanga ari mumwe wevakadzi vatatu vokuAmerica kugamuchira zita reInternational Woman Master. 