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Subject: Re: a mate to solve

Author: Slater Wold

Date: 18:26:54 10/09/01

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On October 09, 2001 at 20:09:51, Uri Blass wrote:

>On October 09, 2001 at 19:52:47, Slater Wold wrote:
>
>>>None of these searches found a mate in ten.  So far, chest is the only tool that
>>>found it (IIRC).
>>
>>
>>In how long??
>
>Chest used 15961 seconds on p200 to find the mate in 10 and it should be
>translated to less than 1 hour on fast hardware.

That's _very_ respectable.

>
>Unfortunately there are programs that have no chance to find it in an hour
>because they stop to search when they find a mate.

Yes.  I cannot use ANY Chessbase engine, they stop when they find the first
mate.

>
>The smartest program in finding mates based on my experience is chessmaster
>but I am not sure if it can find the mate in less than an hour because I believe
>that this is not the kind of the mate that it likes(it likes more mates when
>there are more pieces in the board).

I agree.  But I don't have ChessMaster installed.

>
>I did not test chessmaster so I may be wrong.

I think it could find mate.  In how long might be another story.

>
>I also do not have all the 5 piece tablebases and I expected that maybe they can
>help in finding the mate in 10 because programs do not have to search after the
>last capture that leads to 5 piece tablebase position.

You would think.  But it looks like TB's *might* be hindering the discovery of a
quicker mate.

>
>Note that some tablebases like KQRP vs K may be also productive in finding the
>mate faster(in the main line of chest it gets KQRP vs K position in a position
>when black does mate in 3).

I have all 3/4/5 and a LOT of 6's.

>
>Uri



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