<prompt> Qedela umusho olandelayo: U-Héðinn owazalwa ngo-1975, wanqoba i-World U12 Chess Championship ngo-1987. Ngonyaka olandelayo, wancintisana eMqhudelwaneni Womhlaba Wama-U14, owawuseRomania. UCeaușescu wayesesemandleni ngaleso sikhathi futhi kwakungekho ukudla okwanele kwabaqhudelana; U-Héðinn wahlushwa ukungondleki ngesikhathi somcimbi futhi wagula. Ngo-1990, wanqoba i-Icelandic Chess Championship, eneminyaka engu-15. Ngawo lowo nyaka, waqhudelana emncintiswaneni  <response>: I-29th Chess Olympiad, ithole amaphuzu angu-123 njengoba i-Iceland iqede endaweni yesishiyagalombili kumaqembu angu-108. Ngalesi sikhathi, isilinganiso sakhe se-Elo sasingaphezu kuka-2500. Wathola isicoco sakhe se-international master ngo-1994 nesicoco sakhe se-grandmaster ngo-2007. 