For the international chess community it was the stuff of Greek tragedy—possibly even a blow against humanity. Garry Kasparov, arguably the greatest chess player the ancient game has seen, was defeated by IBM’s computer Deep Blue. ‘It’s about the supremacy of human beings over machines in purely intellectual fields,’ Kasparov had said prior to the 1997 match. Game Over offers an incisive overview of an ultimately unfriendly contest that devolved into psychological warfare, paranoia, accusations and defences.