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Subject: Re: About Go

Author: Pekka Karjalainen

Date: 10:42:26 12/03/02

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On December 02, 2002 at 13:25:28, jefkaan wrote:

>On December 02, 2002 at 08:27:09, Georg v. Zimmermann wrote:
>
>>no way. strong humans can even win with handicap (!) on 9x9
>
>ok, might be, my statement (that 9*9 is easy for a computer
>program) was based on having read some info about a program
>Gotools, which can solve 'life&death' problems within a certain
>area (with sufficient calculation time) using an alfa-beta
>algorithm; this life/death engine also is part of the program
>SmartGo, and as a result i would expect that it would be very
>strong in 9*9 Go, although apparently such an area (9*9) still
>is too large for the Gotools a/b engine to solve it exactly.

  In 1996 an area of 11 spaces took a lot of time.  See:

  http://www.britgo.org/reviews/gtlrev.html

: On my 60MHz pentium the program works through about 100 variations per
: second, which is between 10! and 11! per hour, so if you set it a problem
: with more than 11 places to play it becomes an all night job. At its less
: severe settings it will work more quickly, and will still find the sort of
: moves 1 kyus miss but 3 and 4 dans normally spot.

Now computers are a little faster.

>
>But it would be reasonable to imho expect that within a few years
>such problems could almost be 'solved' for smaller area's (maybe 6x6 ?),
>provided the programming work  would continue in this field; you
>can try it out by yourself by downloading it (9x9 version) from
>www.smartgo.com; the helpfile (tactical analysis) says it can solve
>enclosed life/death problems "as well as most master('dan')players
>and often better"; it also "can solve complex ladder problems
>accurately and quickly". Apparently these features are not
>sufficient yet to get topresults at a 9*9 board; so..,

  I thought it played really weakly.  I am lower than master level at go.

>maybe after 10 years or so ?
>:)

  haha

>best regards
>jefk

Pekka



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