"Kostenyuk will become a member of the Swiss women's team," the SSB press service quoted the official as saying.
It is specified that the Russian chess player will start playing for the Swiss in 2024.
38-year-old Kosteniuk was married to a citizen of Switzerland, so she has a passport of this country for more than 10 years.
She is the winner of the first Women's World Chess Cup (2021), two-time Russian champion (2005, 2016).
Earlier it was reported that the Russian chess player Polina Shuvalova took third place at the World Blitz Championship in Alma-Ata (Kazakhstan).