Chess grandmaster Vladimir Kramnik has filed a defamation lawsuit against FIDE in a Swiss court, seeking financial compensation. This action follows months of online abuse and an inquiry by FIDE into his 'unsubstantiated' cheating accusations against GM Daniel Naroditsky, which intensified after Naroditsky's death. Kramnik announced the suit on X, stating his legal team is finalizing details and has requested evidence preservation from FIDE. Other players have criticized Kramnik's behavior towards Naroditsky.