Here are two interesting articles about go AI from the era before the AlphaGo breakthrough. I thought they present an interesting historical perspective.
Wired, May 2014
IEEE Spectrum, June 2014
Question: when did go AI reach pro-level strength in the 9x9 game?
The second article (from June 2014) casually mentions that “on the 9-by-9 board, top programs are on a par with the best human players”, however there are no further notes or historical remarks about when and how that milestone was demonstrated. I was just wondering if anyone knew about the history and timeline regarding advances in go AI for the 9x9 board.