Larsen won at Hastings 1972–73 on 11½/15, ahead of Wolfgang Uhlmann. At Bauang 1973, he scored 6/9 for 4th place (Kavalek won). Larsen won at Grenaa 1973 in the Nordic Championship with 8½/10. He won again at Manila 1973 with 12½/15, ahead of Ljubojević and Kavalek. In 1975, Larsen defeated Danish Champion and future International Master Gert Iskov at Gellerup by the score of 5½–½ and lost a match to GM Ulf Andersson by the score of 5½–2½ at Stockholm the same year.