site n'etiti afọ 1970 ruo n'etiti afọ 1980, Erika Belle bụ otu n'ime ndị na-egwu egwuregwu Dutch na-eduga. O meriri Dutch Women's Chess Championships ugboro atọ: 1975, 1980, 1981. Onye na-ekere òkè n'ọtụtụ asọmpi egwuregwu egwuregwu mba ụwa. Na 1979, o kesara na Gertrude Baumstark ebe nke abụọ na asọmpi International Women's Chess na Nałęczów (asọmpi ahụ meriri Tünde Csonkics). Na 1981, ọ nọ na nke abụọ n'azụ Nieves García Vicente na asọmpi Zonal Women's World Chess Championship na Benidorm, ekele nke ọ ruru eru maka asọmpi Interzonal. Na 1982, e nyere ya aha FIDE International Women Master (WIM). Na 1982, Erika Belle sonyere na asọmpi World Women's Chess Championship Interzonal Tournament na Bad Kissingen wee nọrọ n'ọnọdụ nke iri na otu. Ajụjụ: Kedu ihe ọ meriri afọ atọ?
1975, 1980, 1981 Ndị na-eto eto