RE: [gnugo-devel] Joseki variations question

[Smith, Christopher]

This is an interesting question, it appears that GnuGo should somehow help 
those stones- but I am not sure if that is actually needed.

If black played R2, Q2 would be a good follow-up. If Q6, R6 and then so on. It 
would obviously get messy in the battle for the corner but I am not sure if it 
is _guaranteed_ to die. But then again I am not an exceptionally strong player.

Is there a way to just 'start' GnuGo from a position like this, but as the 
other color and see what GnuGo would think? Perhaps there is a great attack we 
know of and just the defense to it isn't in our DB.

-Chris Smith

        -----Original Message----- 
        From: Evan Berggren Daniel [mailto:address@hidden 
        Sent: Thu 3/27/2003 9:36 AM 
        To: address@hidden 
        Cc: 
        Subject: [gnugo-devel] Joseki variations question
        
        

        I noticed a problem in the game gnugo-3.3.17-ylamaki-200303262305.sgf.  
At
        move 9, the position is:
        
           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 . . . X . . . . . + . . . . . X . . . 16
        15 . . . . . . . . . . . . . . . . . . . 15
        14 . . . . . . . . . . . . . . . . . . . 14
        13 . . . . . . . . . . . . . . . . . . . 13
        12 . . . . . . . . . . . . . . . . . . . 12
        11 . . . . . . . . . . . . . . . . . . . 11
        10 . . . + . . . . . + . . . . . + . . . 10
         9 . . . . . . . . . . . . . . . . . . . 9
         8 . . . . . . . . . . . . . . . . . . . 8
         7 . . . . . . . . . . . . . . . . . . . 7
         6 . . . . . . . . . . . . . . . . . . . 6
         5 . . . . . . . . . . . . . . X O . . . 5
         4 . . . X . . . . . + O . . . X O . . . 4
         3 . . . . . . . . . . . . . X . X O . . 3
         2 . . . . . . . . . . . . . . . . . . . 2
         1 . . . . . . . . . . . . . . . . . . . 1
           A B C D E F G H J K L M N O P Q R S T
        
        
        Clearly, a play in the lower right is in order.  However, Gnu Go plays
        tenuki.  To what degree do we wish to fix problems in variations like 
this
        with changes to the joseki database?  I think it should be obvious to 
Gnu
        Go that the lower right is the place to play, and there aren't any 
complex
        considerations that it doesn't understand.  Clearly, complex or subtle
        variations that aren't quite joseki need to be in the database, but 
there
        is also value (I believe) to keeping the database small and uncluttered.
        
        What do other people think about this?
        
        Evan Daniel
        
        
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