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Subject: Re: 10K SCSI vs 7200 IDE

Author: Thomas Mayer

Date: 11:52:54 01/16/02

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Hi Slater,

>>>I don't have corrupt TB's, but of course the 6 man is not complete.  They are
>>>not all available yet.

>>afaik Junior 7 does not use 6 men at all in search...

>Yes it does.  I setup a position with 6 pieces (a TB I had) and it was 100%
>TB's.

AFAIK the GUI does, but not the engine in search ! Maybe you try the same
position under an older GUI, say Fritz 5.32 - GUI or whatever (I do not know if
the newer Fritz 6 - GUIs support 6 men TBs)


>>but strange is, that you have different results in score, nodes etc... so this
>>example does not prove anything...

> Sure it does.  The faster search makes the score update quicker.  And the
> scores are exactly the same.

??? So can you explain me this:

SCSI:

92...Ke3 93.Bf4+ Kd3 94.Bxg3 Rxg3 95.Kf2 Re3 96.Rf4 Nd2 97.Kg2 Re2+ 98.Kg3 Ne4+
99.Kg4 Rg2+ 100.Kf5 Kxd4 101.Rf3 Rg5+
  -+  (-3.21)   Depth: 21   00:02:20  198715kN, tb=99381

IDE:

92...Ke3 93.Bf4+ Kd3 94.Bxg3 Rxg3 95.Kf2 Re3 96.Rf4 Nd2 97.Kg2 Re2+ 98.Kh3 Kc4
99.Kg3 Ne4+ 100.Kg4 Kxd4 101.Rf3
  -+  (-3.20)   Depth: 21   00:02:59  225931kN, tb=119289

score is not same, time is not same, nodes is not same, tb is not same...

As I have said, try it e.g. with my little Quark -> you should get all the time
same nodes and same score... just the time will be different, so this will give
a indication about the speed of the disks... I believe the SCSI's are better
though...

>>it seems that the hashtables were not deleted

>Yes they were.  That is an option on DJ7.

oh well, in this case I do not believe much on the ChessBase GUI... there
happens always strange things...

>>or whatever, in common you should get same scores, nodecounts, egtbhits etc. -

>I was using two different HD's.  Like using 2 different CPU's.  Should they
>match up then?!

they should... but of course not, when you use 2 CPUs... some ticks + or - will
change the outcome then by much...

Greets, Thomas



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