<prompt> Qedela umusho olandelayo: Unqobe i-South African Chess Championship ngo-2015, futhi wadlalela iqembu laseNingizimu Afrika le-Olympic Chess ngo-  <response>: Ngo-1998, ngo-2006, ngo-2008, ngo-2012, ngo-2016 nango-2018. 