Nyorai mberi kweiyi ndima - Muna 2006 akakwikwidza paChess Olympiad
kokutanga. Muna 2013, Ziska akawana mutemo wake wekutanga unodiwa kune zita reGM kuRiga Technical University Open 2013. Mumakwikwi akafanana muRiga, akakunda chiitiko chemheni (Tournament D) aine mamakisi e9.5/11 mapoinzi.