Of the 600 million people who know how to play chess worldwide, Phiona Mutesi is one of the best. The 14-year-old Ugandan phenom recently competed in the Chess Olympiad, an international tournament that pits players against each other in strategic competition. A short time ago, Mutesi had never even heard of the game. Her life was consumed with finding food for her family and avoiding trouble in the crime-ridden slum she calls home. But chess is opening new doors for Mutesi, whose story is being documented by Chapel Hill sports writer Tim Crothers.