Tuhia he haere tonu mo tenei pene - I whanau a Larsen i Tilsted, tata ki Thisted i Denmark, a i whakaakona ia i te Kura Katorika o Aalborg. I te marama o Hanuere 1942 i mate a Larsen i etahi mate o te tamarikitanga. Ahakoa kaore he painga pumau, i tenei wa i kitea ai e Larsen te chess. I haere tonu ia ki te tohu mo Denmark e rua i te Whakataetae o te Ao Junior, i te 1951 i Birmingham (te tuarima) me te 1953 i Copenhagen (te tuarima). I tiimata tana takaro i te tau 17 i te wa i neke ai ia ki Copenhagen ki te ako i nga mahi hangarau, engari kaore ia i puta, i te mea i whiriwhiri ia ki te takaro i te kaitakaro ngaio. I riro ia hei Kaiwhakaako o te Ao i te 19 o ona tau i te 1954, mai i tana mahinga parahi-tohu i runga i tetahi i te Amsterdam Olympiad
He aha? I wikitoria ia i tana tuatahi o nga Toa Danish e ono i te 1954, i whakahoutia tenei mahi i te 1955, 1956, 1959, 1963 me te 1964.