Re: computer-go: Pattern matching

["Gary Boos" <gboos@xxxxxxx>]

Thank you.
Do you think opponents (of similar caliber) have better/more detailed
approaches than MFG ?
        Gary
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-----Original Message-----
From: David Fotland <fotland@xxxxxxxxxxxxxxxxx>
To: computer-go@xxxxxxxxxxxxxxxxx <computer-go@xxxxxxxxxxxxxxxxx>;
computer-go@xxxxxxxxxxxxxxxxx <computer-go@xxxxxxxxxxxxxxxxx>
Date: Sunday, November 07, 1999 3:34 AM
Subject: Re: computer-go: Pattern matching


>At 03:56 PM 11/6/99 -0500, Gary  Boos wrote:
>>MFG has a "...seperate database..."  for the opening.
>>MFG got outplayed in the opening by SmartGo at the congress.
>>Can you comment on the code (i.e. not the database) that is
>>used to help play the opening (which seems to be a weak
>>area for MFG) ?
>>        Gary
>
>The opening is a weak area for Many Faces, mostly because I
>rely too much on rote knowledge rather than detailed
>opening patterns.  MF has a big full board opening database
>collected from thousands of games.  I use it to bias the
>evaluation toward moves that are more popular.  It also has
>a big joseki database.  Beyond that there is very little
>opening code.  If there is a joseki move available in a corner,
>it will not consider non-joseki moves in that corner.  Sometimes
>this causes big problems when sequences in one corner spill
>over toward the next corner.  This rule sometimes prevents
>the program from making the correct extension.
>
>I force a move in an empty corner if one is available.
>
>I have some code to evaluate moves in empty corners to encourage
>connected 4-4 corners or shusaku style spiraling 3-4 points.
>
>I try to prevent giving opponent two shimari.
>
>I have some code to evaluate edge extensions and invasions, but it
>is not very good.  I wrote it when I was about 10 kyu, and haven't
>worked on it much since.
>
>I try to make or prevent double wing formations.
>
>David
>
>