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Subject: Re: Who is the real NPS champion?

Author: blass uri

Date: 20:12:05 11/09/99

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On November 09, 1999 at 19:41:02, Dann Corbit wrote:

>On November 09, 1999 at 10:51:00, Ed Schröder wrote:
>[snip]
>>It's indeed more complex than that. Set [Chessknowledge = 500] and NPS
>>will go down, set [Selective Search = 001] and NPS will drop even more.
>>
>>Changing one parameter in Rebel (which isn't available for the user) and
>>NPS will go up with a factor 3-4 which means Rebel would go over 1,000,000
>>NPS on a fast PC.
>>
>>The bottom line is that NPS (like ply-depth) is pretty meaningless.
>I think that ply depth is an excellent indicator of understanding of the
>position unless the program has bugs.  That is to say, if one program finds a
>best move at ply 10, so will the other most of the time.

No because the extensions are not the same.
Chessmaster6000 often can see at depth 3 things that other programs cannot see
at depth 10.

The brute force depth of chessmaster6000 is often not more than 4 at tournament
time control.
Chessmaster show 2 numbers and I understand that the first number is the brute
force depth and the second number is the selective search depth.
The default personality(tested by ssdf) has the parameter ss=6

If I see numbers like 4/10 the meaning(if I understand right) is that it looks
at everything at depth 4,almost everything at depth 10 and does also extensions
after it.

Uri



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