Re: @Dave Bollocks
>(Do this for 10 levels of recursion deep.)
That is the issue, Mr Gumby: the advantage or otherwise of a certain move might not be apparent until the later stages of a game, often 80 moves or more later. (In this respect it is very unlike chess, where generally materiel and position can be analysed).Certainly well beyond the ten moves you give it. So even if you whittle your choice of roughly 19*19 choices down to 100 (?), you could still be looking at 100^80, and still not know if the individual move helps you.
>I'm not sure of how fast this would be..
to asses a possible 100^80+ moves? How many universes have you got?
>but if its too slow...
It will be. By dozens of order of magnitude.
> but that should be more than enough to beat a human.
No, it never has been. Not even against amateur club players, let alone professionals. Which is why this AlphaGo team have not used the approach you have outlined.
>While I am not a Go player.
That is clear. But hey, you're not an idiot. You just overlooked an aspect of a game you haven't played, that's all. It's like the proverb of the man who takes as payment from a king of a grain of rice, doubled on each square of a chess board. 1,2,4,8... (and 60 squares later...)