The international chess federation suspends Vladimir Kramnik for at least one year after he repeatedly posted unproven cheating accusations on social media, including claims involving the late American grandmaster Daniel Naroditsky.Naroditsky, who denied the allegations before his death from an accidental overdose and abnormal heartbeat at 29, had said the accusations affected how others perceived his success, and the federation says Kramnik violated rules against cyber bullying and caused unjustified reputational harm.Kramnik says he will appeal the suspension, calling it unlawful and vowing to restore his reputation, while the federation stresses that cheating claims must follow official procedures and be supported by evidence to protect players and the integrity of the game.