Nyora kupfuurira kweiyi ndima - Denis Allan akakunda Mukwikwidzi Wepachena weChess muna 1970. Akagoverana nzvimbo yokutanga paCanada Open Chess Championship muna 1984. Akanga ari mumwe wevatambi vana chete kuti vakwikwidze muCanada Chess Championship mune imwe neimwe yemakumi mana emakore akateedzana kubva kuma1960 kusvika kuma1990. Muna 1987, muSzirak, Denis Allan akapinda muWorld Chess Championship Interzonal Tournament
, apo yakarongwa 18th.