<prompt> Pedzisa mutsara unotevera: Akaberekwa muna 1975, Héðinn akakunda World U12 Chess Championship muna 1987. Gore rakatevera, akakwikwidza paWorld U14 Championship, yakaitirwa kuRomania. Ceaușescu akanga achiri musimba panguva iyoyo uye pakanga pasina chikafu chakakwana chevakwikwidzi; Héðinn akatambura nekushomeka kwehutano panguva yemutambo uye akarwara. Muna 1990, akakunda Icelandic Chess Championship, aine makore 15. Gore rimwe chetero, akakwikwidza pa  <response>: 29th Chess Olympiad, scoring 1123 sezvo Iceland yakapedza yechisere kunze kwezvikwata 108. Panguva ino, ratidziro yake yeElo yakanga iri pamusoro pe2500. Akawana zita rake renyika yose muna 1994 uye zita rake guru muna 2007. 