Pedzisa mutsara unotevera: Muna 2006 akakwikwidza pa
Chess Olympiad kwenguva yokutanga. 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.