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

[Nick Wedd <nick@xxxxxxxxxxxxx>]

In message <00af01c1a528$eb555ec0$0200000a@xxxxxxxxxxxxxxxxx>, Michael Reiss
<mick@xxxxxxxxxxxxxxxxx> writes
>> 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.
>
>So that's two examples found for having to pass twice...
>anyone construct a 3-pass situation?

What you are asking for is a seki with mutual liberties.  You can
construct one with lots of these:

(lower edge)

 . . . . . . . . . . . . . . . .
 . O O O O O O O O O O O O O O .
 . O X X X X X X X X X X X X O .
 . O X . . . . . . . . . . X O .
 . O X O O O O O O O O O O X O .

Nick
-- 
Nick Wedd    nick@xxxxxxxxxxxxxxxxx