Watch a Robot AI Beat a World Class Curling Competitor

On the ice, a machine-learning system often triumphed over high-level South Korean players Artificial intelligence still needs to bridge the “sim-to-real” gap. Deep-learning techniques that are all the rage in AI log superlative performances in mastering cerebral games, including chess and Go, both of which can be played on a computer. But translating simulations to the physical world remains a bigger challenge. A robot named Curly that uses “deep reinforcement learning”—making improvements as it correct