Yasser Seirawan is a four-time US champion and former world junior champion. He largely retired from chess at the age of 47 in 2007. He decided to return to the fray and was admitted to the field for the US championship in 2011 despite protests that he was displacing a younger player. He won only one game in that tournament. Nevertheless, he has shown that he still has shining abilities in Grandmaster Chess, even defeating Shakhriyar Mamedyarov, rated No. 5 in the world team championship