Author: Brian Katz
Date: 06:16:54 10/21/02
Go up one level in this thread
On October 21, 2002 at 05:49:32, Uri Blass wrote:
>On October 21, 2002 at 05:36:23, Brian Katz wrote:
>
>> Here is an interesting experiment involving Hash Table settings.
>>This was run on a single processor 350MHz Pent II 384 SDRAM with Nalimov 4 disc
>>Endgame Turbo plus additional downloaded 5 piece endgames and Permanent Brain
>>turned off.
>>
>> For my computer's speed the proper HASH TABLE settings for game 5/12 should be
>>16 MB. I have found that 32MB has always worked well, however.
>>As an experiment, since I believe Fritz 7 performs better than Deep-Fritz 7 when
>>using a single processor (even though Chessbase boasts otherwise, stating that
>>DF7 is stronger even when usning a single processor).
>> I raised the Hash Table settings for Fritz 7 to 192 MB as opposed to
>>Deep-Fritz 7 set at 32 MB Hash.
>> Surely, 192 should be much too high for such a time control with my processor
>>speed. Well, Fritz 7 still beat out Deep-Fritz 7 by 5.0-3.0
>
>5-3 is not a significant result and I also think that the effect of hash is
>very small here and I doubt if 32 is better than 128 for Fritz.
>
>Another point:
>I think that it may be interesting to compare nodes per second of Fritz7 and
>Deep Fritz7 on your processor and on the ssdf processors that are faster.
>
>It is possible that when chessbase said that Deep Fritz7 is better on single
>processor they thought only about the fast processors and it is possible that
>Deep Fritz7 was simply not oprimized for the slow processors.
>
>Uri
Here are some comparisons for you Uri involving nodes per second between DF7 and
F7.
I used this position from a USCF tournament game which I just recently played.
[D]r4r1k/pq3pp1/1p2p3/b1p1n3/2P2P2/P1N5/1PQB2PP/R4RK1 b
In this first example I had Fritz 7 as the analysis engine. 32MB Hash
Fritz 7 After 2 minutes........146 kN/s and a - over+ (-0.31) evaluation.
DF7 After 2 minutes........129 kN/s and a - over+ (-0.41) evaluation.
Now with Fritz 7 as the main engine and DF7 as the Kibitzer
Fritz 7 After 2 minutes......... 61kN/s and a - over+ (-0.41) evaluation
DF7 After 2 minutes......... 71kN/s and a - over+ (-0.41) evaluation
However after 3 minutes both engines were at 71 kN/s
Now with DF7 as the main engine
DF7 After 2 minutes......... 62kN/s and a - over+ (-0.41)
Fritz 7 After 2 minutes......... 49kN/s and a - over +(-0.31)
Early on in the first minute with DF7 as the main engine, DF7's nodes were in
the 70's. Deep Fritz was also 1 ply deeper with 12/12 compared to Fritz 7 with
11/11.
Eventually after a number of minutes, the 2 engines level off, but one is
getting there before the other.
Brian
In this first example I had Fritz 7 as the main engine and DF7 as Kibitzer all
settings as 32MB HASH
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