Rubuta ci gaba ga wannan sakin layi - Denis Allan ya lashe gasar zakarun Turai a shekarar 1970. Ya raba wuri na farko a gasar zakarun Kanada a shekarar 1984. Ya kasance ɗaya daga cikin 'yan wasa huɗu kawai da suka yi gasa a Gasar Chess ta Kanada a cikin kowane shekaru huɗu a jere daga shekarun 1960 zuwa 1990. A shekarar 1987, a Szirak, Denis Allan ya halarci Gasar Cin Kofin Duniya ta Duniya
, inda aka sanya shi na 18.