Checkmate

Checkmate is a narrative nonfiction account of one of the biggest scandals in the history of chess, centered on the 2022 clash between Magnus Carlsen, widely considered the greatest chess player ever, and Hans Niemann, a brash 19-year-old American who holds the title of Grandmaster, chess's highest professional title. The book traces the origins, ambitions, and collisions of its three principal forces: Magnus, Niemann, and Chess.com, the billion-dollar online platform that became entangled in the controversy.

The book opens on September 4, 2022, at the Sinquefield Cup in St. Louis, Missouri, one of the most prestigious chess tournaments in the United States. Magnus, a five-time World Champion with a record Elo rating (the numerical ranking system used in competitive chess) of 2882 and a 53-game winning streak in classical chess, the long-time-control format of over-the-board play, was losing to Hans, a last-minute replacement and the tournament's lowest-ranked competitor. Hans countered Magnus's unconventional opening with near-optimal moves while appearing distracted and barely looking at the board. As his defeat became inevitable, Magnus began to suspect something beyond ordinary skill was at work.

The narrative flashes back to trace the origins of its three principals. In 2004, 13-year-old Magnus had just earned Grandmaster status, played legendary champion Garry Kasparov to a draw, and defeated former world champion Anatoly Karpov. His father, Henrik Carlsen, an IT manager who left his career to manage his son, took Magnus on the road for years, competing in over 300 tournaments and teaching him to play with honor and grace. By 2013, Magnus won the World Championship in Chennai, India, defeating five-time champion Viswanathan Anand.

In parallel, the book introduces the leaders of Chess.com. Danny Rensch, a former chess prodigy whose career was derailed by severe ear infections while growing up in a fundamentalist cult near Mesa, Arizona, became the company's chief chess officer. Erik Allebest, a former Mormon who acquired the Chess.com domain for $56,000 at a bankruptcy auction while at Stanford Business School, served as CEO. Together with cofounder Jay Severson, they built Chess.com into the dominant online chess platform, its user base eventually surpassing 100 million after COVID lockdowns and Netflix's The Queen's Gambit. Early on, the team recognized that online cheating aided by powerful chess engines like Stockfish, software capable of calculating millions of positions per second and far exceeding any human player, posed an existential threat. They developed anti-cheating algorithms, and Danny insisted on allowing cheaters a path to redemption rather than permanent bans.

Hans Niemann's backstory is one of disruption and fierce ambition. Born in Laguna Beach, California, his family went bankrupt in the 2008 crash and moved to the Netherlands, where Hans discovered chess at a school for the gifted. After returning to California, he tore through the chess scene with aggressive, emotional play. At 10, he watched Magnus perform a blindfolded exhibition and privately resolved not just to beat the champion but to replace him. By 12, socially isolated in Weston, Connecticut, Hans began accepting engine-assisted moves from a friend during a Titled Tuesday tournament on Chess.com, marking the beginning of a pattern of online cheating.

Around 2020, Danny confronted 17-year-old Hans via Zoom after Chess.com's Fair Play team, the platform's anti-cheating unit, compiled evidence of numerous cheating incidents dating back to 2015. Hans initially denied everything, then broke down and confessed, explaining he had wanted higher ratings so more viewers would watch his streams. Danny offered a rehabilitation plan: Hans would close his account, publicly attribute the closure to a career shift, and serve a six-month suspension. Chess.com's policy was to keep cheating bans private.

During his suspension, Hans hit rock bottom, flying between obscure tournaments in eastern Europe while living in a tiny New York apartment. He resolved to transform his career, and over the next two years he played in over 100 tournaments, earned his Grandmaster title, and climbed the ratings at an unprecedented pace. In August 2022, Hans and Magnus met competitively for the first time at the FTX Crypto Cup in Miami. Hans stunned Magnus by winning their first game but lost the round and finished last, delivering wild, emotional interviews that made him the talk of the chess world. By then, Magnus had privately accepted Chess.com's $80 million offer to acquire his company, Play Magnus.

Hans received a last-minute invitation to the Sinquefield Cup and flew from Turkey to St. Louis. In round three, he defeated Magnus with the black pieces, an extraordinary upset. Magnus, convinced the play was inhuman, stormed out. Henrik texted Danny, who confirmed Hans's cheating history but said they had no evidence of over-the-board cheating and advised against withdrawing. Magnus ignored the advice. The next morning, his chair sat empty. He tweeted that he had withdrawn, attaching a clip of soccer coach José Mourinho refusing to speak because he would be "in big trouble" (167), implying cheating without making an explicit accusation.

The fallout was immediate. Chess.com banned Hans from the site and revoked his invitation to their million-dollar Global Chess Championship. Hikaru Nakamura, a top player and Chess.com streamer, livestreamed to millions, repeating Magnus's insinuations and revealing Hans's prior ban. The scandal went fully viral when Steve Smyth, a Liverpool railway worker, tweeted that Hans had cheated using vibrating anal beads, and Elon Musk retweeted the claim to his 100 million followers.

Hans gave a blistering interview admitting he had cheated on Chess.com twice as a minor but insisting he had never cheated over the board, and accusing Magnus, Hikaru, and Chess.com of colluding to destroy him. On September 19, Magnus escalated the conflict: During an online match at the Julius Baer Generation Cup, he made one move against Hans and immediately resigned, turning off his camera. A week later, Magnus published a formal open letter stating he believed Hans had "cheated more, and more recently, than he has publicly admitted" (204).

Erik, who had disagreed with Danny's decision to disinvite Hans from the Global Chess Championship, recognized that the accusations forced Chess.com to respond. He spent two days compiling a 72-page investigation that identified approximately 100 online games in which Hans likely cheated but could not prove Hans had cheated over the board. The Wall Street Journal published an article based on the findings under a headline emphasizing the scope of online cheating. Hans filed a $100 million lawsuit against Magnus, Chess.com, Danny, and Hikaru, alleging slander, conspiracy, and unlawful boycott. A judge dismissed the suit in August 2023, and the parties reached a settlement that included Hans's reinstatement on Chess.com and a statement from Magnus acknowledging there was no determinative evidence Hans cheated at the Sinquefield.

The narrative culminates in September 2024 at Chess.com's Speed Chess Championship in Paris. Hans and Magnus faced each other in person for the first time since the Sinquefield, and Magnus won the semifinal decisively, 17.5 to 12.5. Before the finals, a Neuralink patient made the ceremonial first move using only his brain-computer interface, prompting Magnus to reflect that machines had already won the war against human chess, and that the entire scandal may have amounted to two humans pretending they still mattered in a game computers had conquered. Hans left the arena alone, walking into the Paris night, still believing he could beat the best in the world, the question of what happened at the Sinquefield remaining permanently unresolved.