Alexandra Kosteniuk is a Russian-Swiss chess grandmaster who became the 12th Women's World Chess Champion. A chess prodigy, she learned to play at the age of five and achieved the grandmaster title in 2004, becoming the tenth woman to do so. She won the Women's World Chess Championship in 2008 and has also secured the European women's championship and two Russian women's championships. Beyond her competitive career, Kosteniuk is a prominent ambassador for chess, working as a model, streamer, and author to promote the game globally.