Top female chess players reacted with horror yesterday after being told they must compete at next year's world championship wearing a hijab.
Within hours of Iran being announced as the host country, the event was plunged into crisis as it emerged that players taking part face arrest if they do not cover up.
Grandmasters lined up to say they would boycott the 64-player tournament and accused Fide, the game's governing body, of failing to stand up for women's rights. Fide officials, meanwhile, called on participants to respect "cultural differences" and accept the regulations.
Hijabs have been mandatory for women in Iran since the Islamic Revolution of 1979 and the law is enforced by the country's "morality police".
Players claim that Fide is turning a blind eye to sexual discrimination.