Västerås SK's Anna Fosselius, 31, became the only goal scorer in the premiere against Finland in Oslo.
The goal was scored from a penalty 27 minutes into the match.
Thus, the reigning world champions have got a great start to this year's championship, which lasts until Saturday.
Later today, 17.30, Russia is waiting for the second match.
Only five teams participate in the tournament. These are the USA, Norway, Finland, Russia and Sweden.