RE: computer-go: Go4++: Passing in tsume searches.

[Jean-Pierre Vesinet <jpvesinet@xxxxxxxxxx>]

> > The following position seems to meet this description.
> >
> > O O O O O O X X X X X
> > O X X X X X O O O O X
> > O X . X . O . O . O X
> > ---------------------
> >
> > O can play atari on the first line after which X captures
> > and O takes back. Infinite ko threats for O. However the
> > position is seki.
> >
> > Daniel Bump

Yes, but the second pass occurs after the entire position has been repeated.
In a tsumego search this would be ruled out by a superko rule to prevent
infinite loops.

> But since O has to take back, that makes it not really a ko threat for O,
> right?  Or am I misunderstanding something?

You're right!

Jean-Pierre Vesinet