As the chess world grieves the death of 29-year grandmaster Daniel Naroditsky – including those who marveled at his brilliance from his days as a first grader in Foster City to his graduation from Stanford – explosive allegations arose Wednesday about an alleged cyberbullying campaign waged against him by a Russian grandmaster.

Just days after Naroditsky’s death Sunday, the president of the International Chess Federation announced Wednesday an ethics and disciplinary investigation into the public statements of grandmaster Vladimir Kramnik, 50, who had accused Naroditsky, as well as other world champions in recent years, of online cheating.

“In recent times, public debate within the chess world has too often moved beyond the boundaries of acceptable, harming not only people’s reputation b

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