[computer-go] Speed of generating random playouts

[Zach Wegner]

On 12/4/07, Álvaro Begué <alvaro.begue at gmail.com> wrote:
>
> How do you keep that updated cheaply as moves are made? For instance, if I
> put a black stone next to a white chain, how do I update the OR and AND
> pseudoliberty values for that chain? John's complicated solution only
> requires storing a sum, which is always easy to update (in my example,
> susbtract the value associated with the point where black just played).

Oh, yes, I see. I didn't think of that. Seemed nice at first...