Daniel Naroditsky, a 29-year-old American chess grandmaster, was falsely accused of cheating by Vladimir Kramnik, a former world champion.

What happened?

Kramnik, 51, claimed that dozens of top players, including Naroditsky, had cheated in online games.

Naroditsky had a substantial online following for his blitz matches and tutorials.

He indicated that the accusations were weighing on his mind shortly before his death.

Why it matters for Daniel Naroditsky

The world chess federation (FIDE) found Kramnik guilty of cyberbullying and making false accusations.

FIDE's ethics committee said Kramnik exposed players to unjustified reputational and psychological harm.

Naroditsky was one of the world's top 25 players in blitz, a discipline where competitors have only a few minutes to complete a game.

What comes next?

Kramnik has denied allegations of bullying and said he is interested only in upholding fair play.

He will appeal against the ruling in the coming days, citing dozens of alleged violations of FIDE's rules.

The suspension is for a year but could be extended if Kramnik is deemed to have breached the rules again.

David Navara, a Czech grandmaster, said Kramnik's accusations drove him to contemplate suicide.

Magnus Carlsen, the former world champion, described Kramnik's actions as appalling.

Naroditsky's death was ruled accidental by a coroner, who said the probable cause was cardiac arrhythmia.

The use of methamphetamine and kratom was a contributing factor, the coroner said.

Kramnik based his cheating claims on a controversial statistical method he developed.

He claimed that certain players were using computers strategically to win games without triggering suspicions.

The shift online has prompted complaints that chess's traditional culture of respect has been eroded by a confrontational digital atmosphere.

FIDE made clear that its ruling was not a judgment on the validity of Kramnik's anti-cheating methods.

The federation said the proceedings were about the manner in which the allegations were communicated publicly.

Naroditsky's fans and fellow players have condemned Kramnik for his actions, which they say harmed the young American's reputation.

The chess community is waiting to see how Kramnik's appeal will play out and what the consequences will be for the former world champion.

The incident has sparked a debate about fair play and respect in the chess world, with many calling for greater accountability and protection for players.