Visby's Davion Wingate was unstoppable in the first two periods.
The American scored 25 points - before Östersund stopped her.
Countrywoman Jessica Kelliher was not much worse with 24 points.
But that was not enough against Östersund, who took their third straight victory.
CLIP: Here Curry writes history - again (2 Jan 2022)
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Stephen Curry continues to put threes for his Golden State Warriors.
Photo: Alex Goodlett / AFP / TT