[computer-go] A thought about Bot-server communications

[Vlad Dumitrescu]

On Dec 13, 2007 12:17 PM, Jacques Basaldúa <jacques at dybot.com> wrote:
> Nick Wedd wrote:
> > In one of the British Championship Match games, a bit over ten years
> > ago, Zhang Shutai made an illegal ko move against Matthew Macfadyen, and
> > immediately conceded that he had lost the game.
>
> Is the game record available? I am interested because I have only found 2
> situations in real games:
>
> a. Triple ko
> b. Double ko when the group sharing the kos has nothing better than life in seki.
>
> Both have cycles smaller than 8 ply and my software doesn't check longer cycles.
>
> I guess any human player would recognize these situations. So if a strong player
> didn't it must be something more complicated.

It doesn't have to be. It can simply be so that he recaptured the ko directly.

I remember (but can't find it) that it was relatively recently that a
japanese 9 dan pro did the same mistake.

regards,
Vlad