Andika mwendelezo wa aya hii - Yepez alikuwa sehemu ya ujumbe wa Ecuador katika Michuano kadhaa ya Kimataifa na Mashindano: 16th Chess Olympiad ya Tel Aviv 1964, 17th Chess Olympiad ya Havana 1966, 18th Chess Olympiad
Lugano 1968, Open Tournament ya Nice - 1974 (Capitan), Panamerican Tournament ya Havana, 1968, II Tournament "Apertura" - Bogotá, 1970, Tournament "Ecopetrol - El Tiempo" - Bogotá, 1970, VIII Caribbean na Amerika ya Kati Zone Tournament FIDE, Bogotá <unk> 1972.