In something out of Black Mirror meets Queen's Gambit, a chess robot accidentally broke the finger of its seven-year old opponent during an exhibition in Moscow, The Guardian reported. The child apparently moved his piece too soon and the robot grabbed his finger and squeezed it, causing a fracture before help could arrive. "The robot broke the child's finger," said Moscow Chess Federation president Sergey Lazarev. "This is of course bad." Video shows the robot grabbing the boy's finger and holding it for several seconds a group of people come to free him.

Played by humans, chess is a game of strategic thinking, calm concentration and patient intellectual endeavour. Violence does not usually come into it. The same, it seems, cannot always be said of machines. Last week, according to Russian media outlets, a chess-playing robot, apparently unsettled by the quick responses of a seven-year-old boy, unceremoniously grabbed and broke his finger during a match at the Moscow Open. "The robot broke the child's finger," Sergey Lazarev, president of the Moscow Chess Federation, told the TASS news agency after the incident, adding that the machine had played many previous exhibitions without upset.