Back in January, Google's DeepMind AI beat the European champion of the complex board game Go, marking a major achievement for AI. Today -- or yesterday, depending where you are in the world -- began the matchup against world champion Lee Sedol, widely regarded as significantly more skilled than the previous opponent Fan Hui.
To the surprise of even the commentators, DeepMind took the first game of the five game series, which will play out over the next few days. While it's just one game, it proves DeepMind can hang with the best of the best -- all the more impressive given it was projected to not be able to even beat the European champion for another decade.
You can watch the full matchup below. The next game can be watched live here in a matter of hours as of press time.