<prompt> Qedela umusho olandelayo: U-Yepez wayeyingxenye yesithunywa sase-Ecuador emincintiswaneni eminingi yamazwe omhlaba kanye nemincintiswano: 16th Chess Olympiad of Tel Aviv 1964, 17th Chess Olympiad of Havana 1966,  <response>: I-18th Chess Olympiad yaseLugano ngo-1968, Umqhudelwano Ovulekile waseNice - 1974 Capitan, Umqhudelwano wasePan American waseHavana, ngo-1968, Umqhudelwano wesibili Apertura - Bogotá, 1970, Umqhudelwano Ecopetrol - El Tiempo - Bogotá, 1970, Umqhudelwano wesi-8 weCaribbean neCentral America Zone FIDE, Bogotá 1972. 