On Wednesday afternoon in Seoul, two players faced off in a game of Go - one of civilisation’s oldest board games. But this game was different to the billions played in the game’s 3,000-year history.

For the first time ever, a computer program beat the world champion at the strategy game at which previously only humans excelled.

Lee Se-dol, a 33-year-old South Korean legend of Go, has lost two of five matches against the AlphaGo program, built by the Google-owned British company DeepMind. The first 3.5 hour game left even first-time viewers, like me, dumbstruck by its swift outcome, with commentators calling it a “superb” game that would be studied for years to come. AlphaGo won its second game the day after (a victory that left Se-dol, who had originally said it would win one if it were lucky, speechless).

This is probably the first time you’ve ever heard of Go - a fiendishly complex checkers-style game allegedly invented by a Chinese emperor to teach his son about political wiles. So why should we care?