This announcement from Anna Muzychuk is from December 2017.
That's absolutely not an obligation to do so anymore. Since a few years, women are free to wear anything they want and are not obligated to be accompanied.
https://holliesmckay.substack.com/p/what-it-is-really-like-as-a-woman
https://www.visitsaudi.com/en/do/culture/saudi-culture-and-customs
@jeffowski @bortzmeyer
https://www.theguardian.com/sport/2017/dec/27/chess-champion-to-miss-saudi-arabia-tournament-over-womens-rights