In a 15-minute video, Demis Hassabis, one of the central scientists working on artificial intelligence, tells us why he worries about AI going rogue. Hassabis, head of Google AI research, is a very strong chess player who created Alpha zero, the first neural network program on which all modern chess engines are based. It is his vivid description of how AI handled chess that will be of particular interest to the readers of our news page.