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Subject: Re: Verified Null-Move Pruning, ICGA 25(3)

Author: Uri Blass

Date: 15:02:32 11/22/02

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On November 22, 2002 at 17:52:50, Omid David Tabibi wrote:

>On November 22, 2002 at 17:06:58, Sune Fischer wrote:
>
>>On November 22, 2002 at 12:21:34, Omid David Tabibi wrote:
>>
>>>On November 22, 2002 at 12:08:12, Sune Fischer wrote:
>>>
>>>>On November 22, 2002 at 07:00:01, Omid David Tabibi wrote:
>>>>
>>>>I think you are right, search times are no good, for many reasons.
>>>>
>>>>However, why don't you use nodes to solution, rather than nodes to depth?
>>>>
>>>>The priority is to solve the position as fast as possible, nodes to solution is
>>>>a direct measure of that.
>>>>
>>>>If you measure nodes to ply 10, what does that say?
>>>>It doesn't say a lot, I can get to ply 10 in 124 nodes, but the program won't be
>>>>any good. So you need confirmation that you didn't wreck it by running the test
>>>>suite.
>>>>
>>>>Instead of having the test suite be an indirect verification test, why not use
>>>>it directly?
>>>>
>>>
>>>Nodes to solution is a great idea. But there are some positions that need a
>>>tremendous amount of time to be solved.
>>>
>>>That idea will be practical only if we have a pool of positions that can be
>>>solved within a reasonable time.
>>
>>That is true.
>>
>>But what do you conclude if a new algorithm produces a smaller tree, but also
>>solves fewer positions, or vice versa; Solves more positions but also produce a
>>larger tree?
>>
>
>Then I can't conclude anything. But for this paper, I wanted to outperform
>standard R=2, which is widely known to be better than standard R=3 (see Heinz
>1999).

standard R=2 is not known to be better than standard R=3(It seems that at least
for movei R=3 gives better results).

Uri



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