"The robot broke the child's finger," Sergey Lazarev, Moscow Chess Federation President, told Tass news agency. "This is of course bad."
A video shared on social media shows the robot taking one of the boy's pieces. The boy then makes his own move, and the robot grabs his finger.
Four adults rush to help the boy, who is eventually freed and ushered away.
Yikes! It wasn't clear if this was due to just bad timing on the kid's part or a technical glitch or what. I doubt the robot was sentient or anything.