Earlier quoted context omitted.
Game AI uses minmax decisions, so it does simulate the opponent to pick _their_ best move, then it picks the move that removes their best options. That's why it's so unsportsmanlike when losing and why it doesn't go for points when winning. It doesn't have a specific profile of the opponent, though, instead it thinks they're another AlphaGo. That's an area they could work on.
AG doesn't actually use minimax, it uses montecarlo tree search, which doesn't even try to simulate a good opponent, it just plays lots of games very fast.
Here's a link: http://www.nature.com/nature/journal/v529/n7587/full/nature1...
I think you search on the title, you can find probably find a non paywalled version.