Dee ihe na-esote paragraf a - Klaasen ruru agba nke abụọ nke 2012 World Championship
site na mmeri 3-1 na Peter Wright, mana James Wade meriri ya 0-4 na agba nke abụọ. Nsonaazụ ya kachasị mma nke 2012 bụ iru nkeji iri na ise nke atọ UK Open Qualifier na Machị ebe ọ tụfuru 4 × 6 na Mark Jones. Na UK Open n'onwe ya, Raymond van Barneveld meriri ya na 64 ikpeazụ 3<unk>9. Mgbe ekpughere ihe banyere ndụ onwe Klaasen nke akọwapụtara n'okpuru ebe a, ọ naghị egwu egwu ọzọ na afọ 2012, nke gụnyere ịhapụ asọmpi Iko Mbaụwa nke 2013.