<prompt> Qedela umusho olandelayo: ULarsen wazalelwa eTilsted, eduze kwaseThisted eDenmark futhi wafunda e-Aalborg Cathedral School. NgoJanuwari 1942 uLarsen wathola izifo eziningi zobuntwana. Nakuba ingekho eyayinomphumela ohlala njalo, kwakungalesi sikhathi lapho uLarsen athola khona i - chess. Waqhubeka nokumela iDenmark kabili eMqhudelwaneni Wamazwe Omhlaba Wama-Junior, ngo-1951 eBirmingham ebeka endaweni yesihlanu nango-1953 eCopenhagen ebeka endaweni yesishiyagalombili. Waqala ukudlala ngokungathi sína eneminyaka engu-17 lapho ethuthela eCopenhagen eyofunda ubunjiniyela bezokwakha, kodwa akazange aphothule esikoleni, kunalokho wakhetha ukudlala i-chess ngokomsebenzi. Waba yi-International Master eneminyaka engu-19 ngo-1954, kusukela ekusebenzeni kwakhe kwezindondo zethusi ebhodini elilodwa e-  <response>: Ama-Olympic ase-Amsterdam. Wathola iziqu zakhe zokuqala eziyisithupha zeDanish Championship ngo-1954, waphinda le feat ngo-1955, 1956, 1959, 1963 no-1964. 