The death of American grandmaster Daniel Naroditsky has sent shock waves through the professional chess world, with many top players blasting a Russian rival who accused him of cheating during online matches.

Daniel Naroditsky, a chess grandmaster who started as a child prodigy and quickly became one of the most influential American voices in the sport, died Monday.

The Charlotte Chess Center, a chess center and academy in Charlotte, N.C., where Mr. Naroditsky was a head coach, announced the death in a statement on social media on Monday.