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Subject: Hiarcs 7.32 vs. 7.0

Author: Shep

Date: 05:40:06 09/28/99

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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



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