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Subject: Re: Risky play

Author: Robert Hyatt

Date: 21:06:48 04/07/01

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On April 07, 2001 at 22:31:05, Aaron Tay wrote:

>On April 07, 2001 at 17:31:12, Vine Smith wrote:
>
>>On April 07, 2001 at 13:13:25, Aaron Tay wrote:
>>
>>>On April 07, 2001 at 06:37:01, Vine Smith wrote:
>>>
>>>>On April 06, 2001 at 23:49:58, Robert Hyatt wrote:
>>>>
>>>>>On April 06, 2001 at 16:13:11, Vine Smith wrote:
>>>>>If you look at the documentation file, "evaluation" command, you can scale
>>>>>king safety up, make it asymmetric in the opposite direction that it is now
>>>>>so that the opponent's king safety is more important that crafty's king safety,
>>>>>then ramp up the 'tropism' term...
>>>>I'll give it a try. Are you interested in hearing of any results or testing?
>>>>Also, if you have any numeric guidelines, such as "Don't set king safety higher
>>>>than x, or it just gets ridiculous", I'd appreciate the info.
>>>
>>>I doubt it will work. My guess is you really have to work on adding more
>>>knowledge rather than just shifting the weights on existing postional factors..
>>>But what do I know..??
>
>>Perhaps, but it's worth trying anyway. I suppose Crafty's existing positional
>>factors were fine-tuned by autoplay against other Crafty versions, but what
>>about versus other programs?
>
>I'm sure Dr Hyatt will comment if he wishes, but I seriously doubt this is the
>case.AFAIK from various postings, Crafty is tested mainly on ICC against Humans
>and other computers ,with a heavier weightage against Humans , and I believe the
>policy is not to play against Crafty clones..


100% of my testing is against IM/GM _humans_.  I occasionally watch games vs
other computer programs, but generally don't pay much attention unless I see
a repeated "theme" in multiple losses.

The human problem is _far_ from being solved.  And it is a very interesting
problem...



>
>So, there is no autoplay at all..
>
>>And, against human opponents, who would find an
>>aggressive style more unnerving?
>
>Perhaps..But Crafty currently is already geared more towards playing against
>Humans I think..
>
>>Maybe other factors will need adjustment as
>>well -- I don't think an attacking program should worry too much about pawn
>>structure, for instance.
>
>
>
>>But my question is whether I would just be duplicating
>>someone else's efforts; haven't there been some Crafty "clones" already along
>>such lines, including one which played the "Halloween Attack" a lot (1.e4 e5
>>2.Nf3 Nc6 3.Nc3 Nf6 4.Nxe4?!)?
>
>I believe that was started by Hossa, which is not a Crafty clone.


It was originally a crafty clone.  I don't remember the handle he used,
but the programmer of Hossa used to use Crafty and build a huge "Halloween"
book.  It was _very_ dangerous in that opening too. :)



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