Dhameystir weedha soo socota: Denis Allan wuxuu ku guuleystay horyaalnimada Open Chess Championship sanadkii 1970. Wuxuu wadaagay kaalinta koowaad ee Canadian Open Chess Championship sanadkii 1984. Wuxuu ka mid ahaa afar ciyaartoy oo kaliya oo ku tartamay Horyaalka Canadian Chess Championship mid kasta oo ka mid ah afartii sano ee isku xigta laga soo bilaabo 1960s ilaa 1990s. Sanadkii 1987-dii, Denis Allan wuxuu ka qaybgalay shirkii Szirak
Tartanka Interzonal ee Horyaalka Adduunka ee Chess, oo kaalinta 18-aad galay.