Geronimo Stilton - Season 1 Episode 14
The Gem Gang

Gary Gudov, world-renowned chess champion, is coming to test his skills against a super-computer -- its the chess match-up of a lifetime! Fortunately for Geronimo, all is calm and quiet in New Mouse City, so he can leave to attend the event. But when the notorious Gem Gang commits a series of robberies, Benjamin and Thea are left on their own to investigate the crimes.