In India’s coastal state of Goa, the world’s best chess players are chasing titles at the FIDE World Cup, a biennial tournament run by FIDE, the International Chess Federation. On the East Coast of the United States, Kenneth Regan chases fairness. Each night he downloads every game, feeding the moves into his programme to see if the play looks human or too perfect. Cheating today isn’t just glances or notes. It can mean phones, signals, or online help from chess engines. Regan’s math hunts for patterns that feel off, walking the thin line between genius and help.

From the 2006 “Toiletgate” scandal—when a world champion was accused of using computer aid during long bathroom breaks—to the 2022 storm between Magnus Carlsen and Hans Niemann, when Carlsen withdrew mid-tournament, suspicion has

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