Accusations of cheating, an offer to play naked to prove fairness, a chess great and a rowdy teenage disruptor.
Welcome to the wild world of professional chess where Norwegian megastar Magnus Carlsen and New York upstart Hans Niemann are embroiled in a controversial feud.
Today, ABC Sport Daily's Patrick Stack unpicks this unusual scandal with chess Grandmaster David Smerdon. 
Featured: David Smerdon, Chess Grandmaster.