Google and Facebook go after GoGoogle DeepMind employs more than 200 AI researchers and engineers. Over the 18 months or so it's spent on AlphaGo, the team ballooned from two or three people to 15, Hassabis said. "Go is a pretty sizable project for us," he said. DeepMind recently hired Matthew Lai, a London researcher who developed a system capable of playing chess at the grandmaster level. His software was able to reason in a way similar to how humans do, a more efficient method than IBM's attempt to crunch every possible outcome before making a move in the 1990s.