Firstly there are vastly more positions in Go.
Secondly, it's very hard to evaluate a Go position, especially at the start of the game when there are few stones on the board. In chess you can get a long way using a simple evaluation (K=99, Q=9, R=5, B=3, N=3, P=1).
>In chess you can get a long way using a simple evaluation (K=99, Q=9, R=5, B=3, N=3, P=1).
I guess it depends on your idea of a "long way". Using only your simple evaluation a program would be rated somewhere around 1000-1200. It would lose every single game to an average tournament player.
