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Subject: Re: "Percentage of fail-highs" question

Author: Gian-Carlo Pascutto

Date: 09:25:25 01/04/00

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On January 03, 2000 at 18:42:31, Daniel Clausen wrote:

>On January 03, 2000 at 18:24:21, Gian-Carlo Pascutto wrote:
>
>>On January 03, 2000 at 16:52:21, Daniel Clausen wrote:
>>
>>[snip]
>>>   #q=19291 [1%]         // #(quiescense-nodes#
>>
>>Wow...does *my* chessprogram have a problem or is this very few ?
>
>Nope, it was a copy/paste error on my side. Actually the 19291 nodes are 11%
>of all nodes, not 1%.

Hrm...I'm usually seeing +-50% quiescent nodes...I always thought this was
a more or less normal value.

>>>   #fhs=27982 [55%]      // #positions where I get a fail-high (FH)
>>>   #fh1s=23591 [47%]     // #positions where the FH occurs after the 1st move
>>[..]
>>>As you can see, the percentage on fail-highs after the 1st move, are *far*
>>>away from the 90%...
>>
>>23591/27982 = 84%
>
>I divided it with the number of positions
>a search was applied to. [ Of course it would be also a good idea to increase
>this percentage, but that's a different subject then. ]

Try searching with a window of (-INF, -INF+1). You should get a quite high
percentage now. I don't think there's any sense in trying to improve it ;)

--
GCP



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