DUBAI (Reuters) - An Iranian chess player arrived in Spain on Tuesday after receiving what a source close to her said were warnings not to return to Iran for competing without a hijab at an international tournament in Kazakhstan. Sara Khadem, born in 1997, took part in last week's FIDE World Rapid and Blitz Chess Championships in Almaty without the hijab - a headscarf mandatory under Iran's strict dress codes. The source, who did not want to be named due to the sensitivity of the matter, said Khadem subsequently received multiple phone calls in which individuals warned her against returning...