Did Niemann Cheat Against Carlsen at the Sinquefield Cup?
Magnus Carlsen accused Hans Niemann of cheating after losing to him at the 2022 Sinquefield Cup. Both Chess.com and FIDE subsequently found no evidence that Niemann cheated in that game or any other over-the-board tournament.
What we know
The specific accusation at the heart of the scandal-that Niemann cheated against Carlsen on September 4, 2022-has never been substantiated by any formal investigation. Carlsen, then unbeaten in 53 classical games and a five-time world champion, withdrew from the Sinquefield Cup the following day after losing to Niemann playing the black pieces. His initial tweet was cryptic; on September 26 he escalated to an explicit public accusation, claiming Niemann had 'cheated more and more recently than he has publicly admitted.'
Chess.com's 72-page report stated explicitly: 'there is no direct evidence that proves Hans cheated at the September 4, 2022 game with Magnus.' The report noted 'certain aspects of the September 4 game were suspicious' and that Niemann's post-game explanation added to suspicion-but stopped well short of a finding of cheating. Tournament arbiters who monitored the game found no suspicious behavior, and Professor Kenneth Regan, FIDE's leading statistical cheating expert, detected nothing of concern from a statistical standpoint.
FIDE's full investigation, published in December 2023, analyzed 13 of Niemann's over-the-board tournaments over three years and concluded: 'the investigation did not yield any statistical evidence to support GM Niemann cheating in over-the-board games.' The case was resolved in August 2023 when Carlsen himself stated in the settlement: 'I acknowledge...there is no determinative evidence that Niemann cheated in his game against me at the Sinquefield Cup.' FIDE subsequently fined Carlsen €10,000 for withdrawing from the tournament without valid cause.
Common claims
- Niemann cheated against Carlsen at the 2022 Sinquefield Cup.Not supported
- Carlsen had solid evidence when he made his accusation.Misleading
- FIDE found cheating in Niemann's over-the-board games.False