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

["Michael Reiss" <mick@xxxxxxxxxxxxxxxxx>]

> It works if you change the shape a bit, e.g.
> 
>  9 . . * * * * * . .
>  8 . * * 0 0 0 * * .
>  7 . * 0 0 . 0 0 * .
>  6 . * 0 0 * * 0 * .
>  5 . * 0 . * * 0 * .
>  4 . * 0 0 0 . 0 * .
>  3 . * 0 0 0 0 0 * .
>  2 . * * * * * * * .
>  1 . . . . . . . . .
>    A B C D E F G H
> 
> Then * cannot almost-fill the area with a nakade shape.
> 
> Martin
> 

So that's two examples found for having to pass twice...
anyone construct a 3-pass situation?

I'm praying that I can have some sort of limit on the 
number of passes allowed because some of my tsumego 
searches are getting 80 ply deep and half the defensive
moves are passes!! Passes are very expensive in tsumego
searches firstly because they add an extra move to 
look at within any given ply and they also fail to fill 
up space in the search region and so leave more choices 
in the next ply.

Am I the only one who's searches are clogged up with 
passes? How have other people dealt with this?

Mick.