RE: [computer-go] Re: double threats

["Anders Kierulf" <anders@xxxxxxxxxxx>]

> > Anders Kierulf wrote:
> >  Currently, it deems a block to be important if it's either:
> > - 3 stones or more, or
> > - surrounded by multiple chains (a likely cutting stone), or
> > - adjacent to an unsettled group.
>
> Jens Lieberum wrote:
> I do not understand exactly what it means to be adjacent to an
> unsettled group. Typically, block tactics are done before
> groups are determined.
> Or does group mean what I called block? In that case, it is
> also difficult to have the actual status of adjacent blocks
> available. Probably, you do not determine the status of blocks
> in more than one pass. Of course, you could guess some status
> depending on the block status in the preceding position.

Good point. You're right, in this context groups have not yet been computed,
and that method then looks at block status instead, and considers blocks
next to unsettled or dead blocks to be important. The capture status of
blocks is available at that point, as all single-block captures are computed
before any multi-captures are considered. Only blocks that are stable under
single-block capture are candidates for multi-capture.

Anders Kierulf
www.smartgo.com


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