<prompt> Bhala ukuqhubeka kwalesi sigaba - uPfeiffer wanqoba izikhathi eziyisithupha eNtshonalanga Jalimane kuma-Olympics e-Chess 1950-1960, futhi wawina izindondo ezimbili zethusi ethimba kanye nomuntu ngamunye ku-Olympic Chess 9th  <response>: eDubrovnik ngo-1950. 