Go is a Chinese board game that dates back thousands of years. There are more possible Go moves than there are atoms in the university so it's been incredibly tough for machines to crack.
The AlphaGo AI agent that has beat Go world champions Lee Sedol and Ke Jie over the last 18 months has now been upgraded.
Unlike the previous versions of AlphaGo, the new "AlphaGo Zero" AI learns how to play Go without any human data. This is a major breakthrough in the field of AI.