<prompt> Ngwala tšwetšopele ya serapa se - Yepez e be e le karolo ya baemedi ba Ecuador go Dikgaisano tše mmalwa tša Ditšhabatšhaba le Dipapadi: 16th Chess Olympiad ya Tel Aviv 1964, 17th Chess Olympiad ya Havana 1966, 18th Chess Olympiad  <response>: ya 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 le Central America Zone Tournament FIDE, Bogotá 1972. 