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United States women’s chess champion Nazi Paikidze (pronounced NAH-zee Puh-KEED-zee), 22, of Las Vegas, won’t be going to the 2017 Women’s World Chess Championship in February. But it’s not because she didn’t make the cut. She’s boycotting the event in Tehran, Iran, where strict Islamic law requires all women—whether Iranians or visitors—to wear a hijab, a Muslim head scarf. Paikidze asked the World Chess Federation to either change the tournament’s location or persuade Iranian officials to make the hijab optional. She also made her case on Instagram: “I think it’s unacceptable to host a Women’s World Championship in a place where women do not have basic fundamental rights,” she wrote. The World Chess Federation says Iran is the only nation that offered to host this year’s event, and there are no plans to change the venue.