Nyora kupfuurira kweiyi ndima - Muna 1992 akakunda Swedish Chess Championship. Karlsson akahwina menduru dzesirivha mumakwikwi enyika kaviri (1979, 1986) uye menduru yebronze kamwe (1976). Muna 1982 muLas Palmas akapinda muWorld Chess Championship Interzonal Tournament
uye akaiswa panzvimbo yechi11.