Burrowed in the alleys of Hongik-dong, a hushed residential neighborhood in eastern Seoul, is a faded stone-tiled building stamped Korea Baduk Association," the governing body for professional Go. The game is an ancient one, with sacred stature in South Korea. But inside the building, rooms once filled with the soft clatter of hands dipping into...

This is today's edition ofThe Download,our weekday newsletter that provides a daily dose of what's going on in the world of technology. AI is rewiring how the world's best Go players think Ten years ago AlphaGo, Google DeepMind's AI program, stunned the world by defeating the South Korean Go player Lee Sedol. And in the...