Magnus Carlsen’s shock withdrawal from the $350,000 Sinquefield Cup in St Louis following his third-round defeat to the newcomer Hans Niemann has triggered a variety of “cheating” claims. It is potentially the most serious such case for international chess since the 2005 Toiletgate world championship match, when Veselin Topalov accused Vlad Kramnik of analysing games in the lavatory.
Carlsen’s loss to Niemann, 19, was his first for several years with White to a much lower rated opponent, and it was the first withdrawal of the Norwegian’s entire career. His only explanation was a cryptic video clip of the football manager José Morinho saying “If I speak I am in big trouble,” during a press conference about referees.