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Subject: Re: Three Brain Schredder

Author: Uri Blass

Date: 15:33:54 11/17/00

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On November 17, 2000 at 18:23:30, Torstein Hall wrote:

>On November 17, 2000 at 17:44:50, Uri Blass wrote:
>
>>On November 17, 2000 at 17:20:25, Fernando Villegas wrote:
>><snipped>
>>>c) If it is not, how this entity compares with Schredder IF two top programs are
>>>harnessed toguether? I suppose many experiment has been already performed before
>>>delivery.
>>
>>I think that it is has some rules based on evaluations and main lines.
>>
>>Example 1:If engine A fail low after 1 second and engine B fail low after 10
>>seconds with the same main line then it is logical to assume that engine B is
>>weaker in tactics in the relevant position so it is logical to choose engine A.
>>
>>Example 2:If engine A shows evaluations:+1.1 and the evaluation goes down to 0.5
>>when engine B has stable evaluation of 0.0 then it is logical to assume that
>>engine B understands the position better(I usually expect +1.1 to go up and not
>>to go down) so it is logical to choose engine B.
>>
>>I do not know if Shredder is using similiar ideas but this is the ideas that
>>seem to me logical to try in order to be correct most of the time in choosing
>>the right engine in cases when both engines have equal strength.
>>
>>Uri
>
>I feel that such a beast must be weaker than a normal program, as it have to
>waste a lot of computing time. First two engines computing the same pos. Then
>the third engine etc. etc.
>
>Torstein

I disagree because of the following reasons:

1)The third engine may have a simple rule to decide so it practically may waste
less than 1% of the time.

2)The two engines do not use the same time so it can be clearly less than twice
slower because the playing engine may be used 90% of the time.

Uri



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