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Subject: Re: Hiarcs 7.32 vs. 7.0

Author: m.d.hurd

Date: 11:49:04 09/28/99

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On September 28, 1999 at 09:39:08, Bertil Eklund wrote:

>On September 28, 1999 at 08:54:53, Enrique Irazoqui wrote:
>
>>On September 28, 1999 at 08:40:06, Shep wrote:
>>
>>>On September 28, 1999 at 06:49:54, Bertil Eklund wrote:
>>>
>>>
>>>>If H7.32 is weaker then H7.01 my guess it´s because of the table-bases that
>>>>slows it down a lot in the endgame. If you have played both versions I guess you
>>>>should have recognized it immediately.
>>>
>>>I wouldn't say it gets slowed down "a lot". I have never seen Hiarcs drop below
>>>its usual middle game node count even during heavy tablebase access.
>>>Maybe it would be faster without them, but certainly not to the point where it
>>>is actually harmful.
>>>If TB usage is indeed counterproductive, it is probably not related to decreased
>>>search speed.
>>>Example: FIN09 from Louguet II. Hiarcs 7.0 solves this in 18 minutes on my
>>>P6-233 while 7.32 cannot solve it in 40 minutes! Yet this is a position where
>>>a) Hiarcs does not slow down to a crawl (although it does probe them
>>>   a lot more than e.g. Nimzo) and
>>>b) tablebases are quite useful IMO
>>>
>>>Besides, if indeed 7.32 plays weaker than 7.0 in general, it is definitely not
>>>tablebase-related; for example in my recent big tournament, there were only two
>>>games where Hiarcs ever probed the TB's, and neither of them was anything but a
>>>draw anyway.
>>>
>>>---
>>>Shep
>>
>>I think that H732 is stronger than H701 (so does Mark), even if only because
>>it's faster. But it also knows a bit better. I didn't notice significant slower
>>searches when accessing tablebases, maybe because I copied them to disk.
>>
>>Enrique
>
>Hallo!
>
>I have them on my disk but I can see the nps go down from say 90-100 to 50-60,
>it´s not that much but significant I think.
>
>Regards Bertil SSDF

Could this have anything to do with the TB cache being set to low in the ini
file ?

Regards

Mike

Mike@hurd.swinternet.co.uk



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