Who Sued Magnus Carlsen? A Deep Dive into Chess‘s Biggest Scandal
The chess world was turned upside down in September 2022 when American teenage grandmaster Hans Niemann stunned reigning World Champion Magnus Carlsen at the prestigious Sinquefield Cup chess tournament. Niemann‘s shock victory kicked off a cascade of events that culminated in an explosive $100 million lawsuit alleging Carlsen and others tried to destroy Niemann‘s career with unfounded cheating accusations. This saga has gripped the chess community for months – here is a comprehensive look at the entire unfolding drama.
Niemann‘s Stunning Upset
On September 4th, the 19-year-old Niemann pulled off one of the biggest upsets in recent chess history by beating 31-year-old Carlsen as black. Carlsen had been on a dominant streak, undefeated in 53 consecutive classical chess games over 2 years. But against Niemann, the Norwegian‘s streak came to a crashing halt.
Niemann was ranked only 49th in the world entering the tournament, while Carlsen has been the undisputed World No. 1 for over a decade. For the underdog to beat the elite Carlsen with the disadvantage of playing black pieces shocked the chess world.
Carlsen‘s Suspicious Withdrawal
Immediately after his loss, Carlsen made the highly unusual move of withdrawing from the remainder of the prestigious Sinquefield Cup tournament. He offered no clear reason for abandoning the event beyond tweeting cryptically "I‘ve withdrawn from the tournament. I‘ve always enjoyed playing in the @STLChessClub, and hope to be back in the future."
Carlsen‘s abrupt mid-tournament departure fueled speculation that he suspected Niemann had somehow cheated in their game, leading many to question how the unknown teenager could have legitimately beaten the world champion.
Carlsen Implies Foul Play with Mourinho Meme

While Carlsen initially did not make any direct accusations, a few days after the game he posted a tweet with a video of football manager José Mourinho saying "If I speak I am in big trouble". This cryptic meme was widely interpreted as Carlsen implying he thought Niemann had cheated but could not say so openly without concrete evidence.
Niemann Admits to Past Online Cheating
On September 6th, Niemann acknowledged in an interview with chess.com that he had cheated in online chess games on two occasions when he was 12 and 16 years old. However, he insisted that he has never cheated in over the board games, stating emphatically "I have never cheated in an over-the-board game. If they want me to strip fully naked, I will do it."
Niemann claimed he cheated online as a child only because he was frustrated and wanted to gain an online ranking. He expressed regret and said he was "just a kid" who made a mistake.
Chess.com Bans Niemann Account, Reveals Likely Cheating
Shortly after Niemann‘s admission, the influential website Chess.com revealed they had previously privately banned Niemann‘s account after detecting likely cheating, including in prize money events on the site.
An investigation by Chess.com found irregularities in over 100 of Niemann‘s online games that indicated likely cheating through use of chess computer engines. Niemann had admitted to cheating on Chess.com when he was 12 and 16, but they determined he likely cheated more recently and frequently than admitted.
Carlsen Withdraws After One Move Against Niemann
The feud reached new heights in October when Carlsen withdrew from a match against Niemann after playing just one move. The game was part of the Julius Baer Generation Cup online tournament.
Carlsen offered no explanation, but making one move before resigning was seen as his way of protesting Niemann‘s participation without having to play him. Tournament organizer Chess24 later criticized Carlsen‘s actions as "damaging the reputation of the tournament and World Chess as a whole."
Carlsen Implies Niemann Cheated Over The Board
In a statement released after this second withdrawal, Carlsen made his most direct implication yet that Niemann had cheated in their over the board game, saying Niemann‘s "over the board progress has been unusual" and his play against him at Sinquefield Cup did not seem "tensioned" or "fully concentrated."
While not an explicit accusation, this was interpreted by most as Carlsen clearly signaling his belief that Niemann had somehow cheated against him in St. Louis.
Other Top Chess Players Voice Suspicions
Carlsen was not alone in finding Niemann‘s upset win suspicious. American grandmaster Hikaru Nakamura, ranked 5th in the world, tweeted after Carlsen‘s withdrawal: "His rise is statistically impossible, without cheating."
Israeli player Maxim Dlugy said privately that he believed Niemann had cheated, a transcript Chess.com threatened to make public before Dlugy confirmed it. Other top players expressed disbelief that Niemann could so easily beat Carlsen without trickery.
However, some grandmasters like Anish Giri defended Niemann, cautioning against a rush to judgment without hard evidence. This divided the chess elite.
$100 Million Lawsuit Lobbed by Niemann Against Carlsen and Chess.com
On October 20th, Niemann pushed back vigorously by filing an explosive lawsuit seeking $100 million in damages from Carlsen, Chess.com, Nakamura and others. He alleged the defendants worked together to falsely accuse him of cheating to undermine his career.
Niemann claims Chess.com falsified evidence to support Carlsen because they have business ties, as Chess.com recently purchased Carlsen‘s Play Magnus app for nearly $83 million.
The lawsuit portrays Carlsen as the jealous "King of Chess" who could not accept losing his crown and embarked on a malicious campaign to smear his rival‘s reputation.
Chess.com Dismisses Lawsuit as "Frivolous"
Chess.com responded to the lawsuit by releasing a 20-page statement standing by their cheating analysis as unbiased and calling the litigation "frivolous." They insist they had no contact with Carlsen regarding Niemann and made their decision independently based on data.
The company revealed troubling details such as Niemann privately admitting to more cheating than he told the public. They also noted his strength has not declined since being banned from Chess.com events, arguing this proves he benefited long-term from illicit computer assistance.
Carlsen Files Detailed Evidence of Niemann‘s Online Cheating
In a court motion to dismiss the lawsuit in January 2023, Carlsen offered Niemann‘s history of online cheating as justification for his suspicions, citing Chess.com‘s extensive evidence. An analysis of Niemann‘s games found:
- Niemann privately confessed to cheating in chess games as recently as 2020, when he was 17.
- He likely cheated in over 100 online games, including in prize tournaments.
- His moves matched chess engines at an improbably high rate.
- His performance spiked to superhuman levels with no explanation.
- He engaged in sustained rating manipulation by intentionally losing games.
Carlsen argued this statistical evidence supports his belief Niemann gained an unnatural advantage through online cheating that influenced his OTB play.
Summary of Niemann‘s Alleged Cheating According to Chess.com:
| Age | Confessed to Cheating | Games Analyzed | Likely Cheated | Suspicious Rating Gains |
|---|---|---|---|---|
| 12-13 | Yes | 688 | 0 | None |
| 14-15 | No | 1,119 | 0 | None |
| 16 | Yes | 1,117 | 9 | Yes |
| 17 | Yes | 515 | 53 | Yes |
| 18-19 | No | 3,018 | 74 | Yes |
Chess World Remains Divided on Scandal
The chess community continues to argue over whether Niemann cheated against Carlsen OTB and if Carlsen‘s actions have been justified or overly dramatic. Until definitive evidence arises, the debate appears stalled between three camps:
- Carlsen‘s supporters who believe he would not make such claims without good reason.
- Niemann‘s defenders who argue he deserves due process before being branded a cheater based on online games.
- Skeptics awaiting more proof before making a judgment.
With so much speculation but little concrete evidence either way, the controversy seems destined to continue playing out both across chess forums and perhaps in the courts.
Uncertain Path Ahead for American Prodigy
For the 19-year-old Niemann, Carlsen‘s suspicions have upended his hopes of rising to chess stardom. Despite his natural talent, the smear of alleged cheating looks set to hamper his career for the foreseeable future.
Top tournaments may shun him to avoid uproar, and opponents may question any brilliancies as tainted by unfair advantage. Even if cleared legally, the social stigma could persist.
Meanwhile for Carlsen, his unprecedented dominance of the chess world has been shaken by the defiant emergence of a new rival. How the world champion responds to this challenge could determine whether he maintains his crown in the years ahead.