Buuxi weedha soo socota: Larsen wuxuu ku dhashay Tilsted, meel u dhow Thisted ee Denmark wuxuuna wax ku bartay Aalborg Cathedral School. Bishii Janaayo 1942 Larsen wuxuu qabay dhowr cudur oo caruurnimo ah. Inkastoo aysan jirin wax saameyn ah oo joogto ah, waxay ahayd xiligaan in Larsen uu ogaaday chess. Wuxuu u soo gudbay inuu Denmark u matalo laba jeer Horyaalka Adduunka ee Da'yarta, 1951kii Birmingham (oo kaalinta shanaad galay) iyo 1953kii Copenhagen (oo kaalinta siddeedaad galay). Wuxuu si dhab ah u bilaabay ciyaarista markii uu ahaa 17 jir markii uu u guuray Copenhagen si uu u barto injineernimada madaniga ah, laakiin waligiis ma uusan qalin jabin isagoo doorbiday inuu si xirfadeed u ciyaaro shakhsi ahaan. Wuxuu noqday Master caalami ah isagoo 19 jir ah sanadkii 1954, waxqabadkiisii bilada naxaasta ahaa ee ku jiray mid ka mid ah
Ciyaaraha Olombikada ee Amsterdam Wuxuu ku guuleystay liiskiisii ugu horreeyay ee lixda horyaal ee Danmark 1954, isagoo ku celceliyay guushaan 1955, 1956, 1959, 1963 iyo 1964.