Ia faaauau pea le faitauina o lenei palakalafa - O Yepez sa avea ma vaega o le vaega a Ekuatoa i le tele o siamupini ma taamilosaga faavaomalo: 16th Chess Olympiad
o Tel Aviv 1964, 17th Chess Olympiad of Havana 1966, 18th Chess Olympiad of Lugano 1968, Open Tournament of Nice - 1974 (Capitan), Panamerican Tournament of Havana, 1968, II Tournament "Apertura" - Bogotá, 1970, Tournament "Ecopetrol - El Tiempo" - Bogotá, 1970, VIII Caribbean ma Amerika Tutotonu Zone Tournament FIDE, Bogotá <unk> 1972.