Tuhia he tomokanga mō tēnei wāhanga - I te tau 2006 i whakataetae ia i te Chess Olympiad
mō te wā tuatahi. I te tau 2013, i whiwhi a Ziska i tana paerewa tuatahi e hiahiatia ana mo te taitara GM i te Whare Wananga Hangarau o Riga Open 2013. I taua whakataetae ano i Riga, i wikitoria ia i te huihuinga papatipu (Tournament D) me te kaute 9.5/11 tohu.