This story seems illuminating
"His [KEN REGAN] work began on September 29, 2006, during the Topalov-Kramnik World Championship match. Vladimir Kramnik had just forfeited game five in protest to the Topalov team's accusation that Kramnik was consulting a chess engine during trips to his private bathroom. (...) Topalov's team published a controversial press release trying to prove their previous allegations. Topalov's manager, Silvio Danailov, wrote in the release, '... we would like to present to your attention coincidence statistics of the moves of GM Kramnik with recommendations of chess program Fritz 9.' (...) An online battle commenced between pundits who took Danailov's 'proof' seriously versus others, like Regan, who insisted that valid statistical methods to detect computer assistance did not yet exist. (...) In just a few weeks, the greatest existential threat to chess had gone from a combination of bad politics and a lack of financial support to something potentially more sinister: scientific ignorance. In Regan's mind, this threat seemed too imminent to ignore. 'I care about chess,' he says. 'I felt called to do the work at a time when it really did seem like the chess world was going to break apart.'"
