Daniel Naroditsky, a standard-bearer in the world of competitive chess that flourished in the COVID-19 pandemic, died Monday at the age of 29, leaving behind a legacy as one of the greats of the game who helped usher in its digital era.

The American grandmaster won several championships and amassed hundreds of thousands of subscribers on YouTube, Twitch and other platforms, where he would livestream matches and explain strategy in real time. But he also struggled with the cyberspace he helped build.

High-speed games became wildly popular online during the pandemic, creating a chess community that was soon rife with cheating allegations as players gained access to sophisticated computer programs that could give them an unfair advantage.

Naroditsky's untimely death has shined a spotlight on the dark underbelly of the game that fellow pros say brought undue criticism and hostility upon the chess star in his final months.

His cause of death has not been released.

Ukrainian grandmaster Oleksandr Bortnyk described on a livestream how he and a friend went to Naroditsky's home to check on him and found the chess pro unresponsive on the couch.

Naroditsky had been dogged by unsubstantiated claims of cheating from Russian grandmaster and former World Chess Champion Vladimir Kramnik, whom Naroditsky had called one of the "heroes" he looked up to as a young player.

The California-born pro had denied the claims as he excelled at blitz and bullet chess, where players have mere minutes to finish intense matches. He was vocal about how the allegations took a toll on him.

"Ever since the Kramnik stuff, I feel like if I start doing well, people assume the worst of intentions," Naroditsky said Saturday in the last livestream he filmed before his death. "The issue is just the lingering effect of it."

He ruminated about his legacy and hoped other top players would trust that he played with integrity.

Chess pros from around the world have since praised Naroditsky as an honorable ambassador of the game who used his online platform to make chess accessible to everyone. His family said in a statement that they hope he will be remembered for the joy and inspiration he brought people every day.

Grandmasters slammed Kramnik this week on social media for how he had treated Naroditsky. American grandmaster Hikaru Nakamura went on an expletive-laden rant on his latest livestream, and Indian grandmaster Nihal Sarin accused the Russian pro of trying to destroy Naroditsky's life.

Kramnik continued to post about Naroditsky on the day his death was announced, calling it a tragedy and speculating about the cause.

Naroditsky became a grandmaster, the highest title in chess aside from World Chess Champion, at the age of 18. He was consistently ranked in the top 200 worldwide for traditional chess and was a top 25 blitz player, winning the U.S. National Blitz Championship in August. He spent much of his time training young players in Charlotte, North Carolina.

"Daniel was an incredible teacher and explainer of chess and concepts and ideas," said Daniel Weissbarth, co-owner of Silver Knights Chess Academy in Fairfax, Virginia.

Arkady Dvorkovich, president of the International Chess Federation, said the organization will establish a prize in memory of Naroditsky. Dvorkovich described the young grandmaster as brilliant, kind and a truly good person.

Many pros this week called for an end to the constant finger-pointing that seemed to follow players like Naroditsky who thrived in fast-paced play.

Kenneth Regan, a chess international master and computer science professor at the University at Buffalo, said the opportunity to cheat has exploded as the cerebral sport has shifted online. There are ways to police the game online, but Regan said they are intrusive.

"The rate of cheating online is 100 to 200 times higher than the rate over the board," Regan said. "From my point of view, there are five to 10 cases per year over the board."

The popular internet chess server Chess.com shut down Kramnik's blog on the site in 2023, saying he had used it to spread baseless cheating allegations about "many dozens of players." At the time, the platform warned of "Kramnik's escalating attacks" against some of the most respected members of the chess community and some promising young talents.

The speedy style of play popularized in chess' digital arena is somewhat reliant on the honor system.

Top talents analyze the board so quickly and move with such precision that cheating allegations have become common. Bullet chess is so fast, Regan said, that it's essentially "playing chess entirely with your gut."

Last week, Naroditsky posted a video in his popular Speedrun series on YouTube, telling viewers he was "back, better than ever" after a short "creative break." His videos, in which he gave tips and discussed strategy, were great tools for chess players of various abilities, said Benjamin Balas, a psychology professor at North Dakota State.

"He would tell you 'This is the kind of mistake you're going to see at this level,' and he would make mistakes, too, and talk to you how to manage them," Balas said.

Nakamura and five-time World Chess Champion Magnus Carlsen are also using social media to take chess to a wider audience, increasing its popularity around the world.

"People, they see Daniel or other streamers and they start to play online chess," said John Hartmann, editor of Chess Life magazine. "The streaming personalities, they lead people into the chess world."

Carlsen credited Naroditsky for his work in the streaming space, saying he was "such a resource to the chess community."