Pedzisa mutsara unotevera: Guðmundur Arnlaugsson aizivikanwawo semutongi wemutambo wechess kubva kutanga kwema1970. Muna 1972, akava FIDE International Arbiter. Muna 1981, akanga ari mumwe wevatongi mumatare Anatoly Karpov naViktor Korchnoi
Mutambo weWorld Chess Championship. Guðmundur Arnlaugsson avewo ari chess muparidzi uye mutsigiri paIceland redhiyo neterevhizheni.