Mezue ahịrịokwu na-esonụ: Demchenko nwetakwara ihe nrite asatọ na FIL European Luge Championship na ọla edo anọ (Ndị nwoke: 2006, 2010; Mixed team: 2012, 2014), ọlaọcha abụọ (Ndị nwoke:
1996, 2008), na ọla nchara abụọ (Ndị nwoke na-agbakọ: 1996; Mixed team: 2013).