Re: [gnugo-devel] Joseki constraint question

[Arend Bayer]

Evan wrote:

> Is this constraint correct?
>
> Pattern JH488
>
> -------+
> .......|
> .......|
> .......|
> ...O...|
> ..*X...|
> ...OX..|
> .......|
> .......|
> .......|
>
> :8,sFJ
>
> -------+
> .......|
> .......|
> .......|
> ...OB..|
> ..*XA..|
> ...CX..|
> .......|
> .......|
> .......|
>
> ;!oplay_attack(A,*,B,C)
>
> It looks to me like it's checking the wrong thing; should there be some
> other constraint there?

I think the "!" should be omitted, then the constraint looks correct.
If X cannot capture C in a ladder after the sequence O at A - * - B, then
this is the best line of play. Otherwise, * is the only move. (Could actually
be upgraded to "U").

Arend