Chess ace Carlsen quits after one move as Niemann 'anal beads' row escalates Wild theories of vibrating anal beads being used to cheat in global chess competitions ABC listen How to cheat at chess: the theories and fallout of a huge scandal video explainer Chess The Guardian Vibrating crotches, anal beads and suspicious minds: the long, strange history of chess cheats Chess The Guardian Chinese chess scandal: Bathtub defecation, anal beads and a stripped title Euronews Chess player denies using vibrating anal beads to beat opponent Toronto Sun