Re: computer-go: perfect play

[Andre Engels <engels@xxxxxxxxxx>]

William Harold Newman wrote:

>      A B C D E F G H J K L M N O P Q R S T
>   19 . . . . . . . . . # . . . . . . . . . 19
>   18 . . . . . . . . . # . . . . . . . . . 18
>   17 . . . . . . . . . # . . . . . . . . . 17
>   16 . . . . . . . . . # . . . . . . . . . 16
>   15 . . . . . . . . . # . . . . . . . . . 15
>   14 . . . . . . . . . # . . . . . . . . . 14
>   13 . . . . . . . . . # . . . . . . . . . 13
>   12 . . . . . . . . . # . . . . . . . . . 12
>   11 . . . . . . . . # . # . . . . . . . . 11
>   10 . . . . . . . . # # # . . . . . . . . 10
>    9 . . . . . . . . # . # . . . . . . . . 9
>    8 . . . . . . . . . # . . . . . . . . . 8
>    7 . . . . . . . . . # . . . . . . . . . 7
>    6 . . . . . . . . . # . . . . . . . . . 6
>    5 . . . . . . . . . # . . . . . . . . . 5
>    4 . . . . . . . . . # . . . . . . . . . 4
>    3 . . . . . . . . . # . . . . . . . . . 3
>    2 . . . . . . . . . # . . . . . . . . . 2
>    1 . . . . . . . . . # . . . . . . . . . 1
>      A B C D E F G H J K L M N O P Q R S T
> 
> (This has 23 stones, and I think what I proposed at the time had 25, with 
> extra stones at J8 and L12.)
> 
> Now if Black plays mirror go, with every move on one side reflected
> across the line of stones (so e.g. H2 is answered with M2) then Black
> should win by at least two points.

[snip]

> Does anyone have a way to defeat this mirror-go strategy in any of
> these starting positions?

Create a position with four direct kos (two on each side of the line).
White captures ko A1, black captures A2 (being the mane-go equivalent of A1).
White captures B1, black captures B2. White recaptures A2, black recaptures
A1. White recaptures B2, black is disallowed from recapturing B1. Manego
has been broken.

 
-- 
Andre Engels, engels@xxxxxxxxxxxxxxxxx
http://www.win.tue.nl/~engels/index_en.html

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