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