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

[a a <twoeyes22@xxxxxxxx>]

Michael Reiss wrote: 

> Are there any tsume problems where the defender
*must* pass but the pass 
> move is not the defenders last move before the
search terminates? 



Look at this problem:

 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

0 is alive in a seki because he has a 7 space eye.
However, if it is his turn, he MUST pass or he kills
himself.

Also, If * tries to capture 0 by playing inside the
eye, then 0 must continue to pass until * gives atari:
When * gives atari, 0 captures and live.


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