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Subject: Re: How make Fritz execute brute force search?

Author: leonid

Date: 18:51:14 07/26/00

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On July 26, 2000 at 21:44:06, Jason Williamson wrote:

>On July 26, 2000 at 21:20:33, leonid wrote:
>>On July 26, 2000 at 21:03:27, Jason Williamson wrote:
>>>On July 26, 2000 at 19:45:15, leonid wrote:
>>>>On July 26, 2000 at 18:29:36, Torstein Hall wrote:
>>>>>On July 26, 2000 at 18:22:47, leonid wrote:
>>>>>>On July 26, 2000 at 17:26:01, Tom Kerrigan wrote:
>>>>>>>On July 26, 2000 at 16:59:35, leonid wrote:
>>>>>>>>On July 26, 2000 at 13:40:32, Tom Kerrigan wrote:
>>>>>>>>>On July 26, 2000 at 09:18:41, leonid wrote:
>>>>>>>>>>How ask Fritz execute brute force search? I have Fritz 6 but if it is possible
>>>>>>>>>>for some other version (even better DOS version), please say me.
>>>>>>>>>>Recently I went to see Fritz nodes per second performance. Very impressive! Only
>>>>>>>>>>maybe I am missing exact numbers. NPS tend to grow when search is done by brute
>>>>>>>>>>force. This is why I try to find where Fritz numbers stays in real. But Fritz,
>>>>>>>>>>in dispite of its performance, is not exactly open minded piece of software.
>>>>>>>>>>Even its NPS I was able to see only through my Hiarcs 7.32 program.
>>>>>>>>>>Thanks in advance,
>>>>>>>>>My search is selective only because of null-move. I believe this is also the
>>>>>>>>>case with Fritz.
>>>>>>>>>With null move on, my program searches 634k NPS. (BK, short searches)
>>>>>>>>On what hardware do you have 634k? I was very impressed with Fritz numbers only
>>>>>>>>because they were between 220 and 320k on AMD 400Mhz. Your numbers are almost
>>>>>>>>twice as fast.
>>>>>>>Pentium III/800. On a K-6/400 I figure I'd get 350k NPS or so. And that's for BK
>>>>>>>positions; if I did a 5 second run of WAC, I'd get 780k NPS or so.
>>>>>>If I am not missing there something, your numbers are better that the Fritz
>>>>>>have. If you could someday check at what speed Fritz 6 goes on your hardware and
>>>>>>send me the numbers (best with some concret position), it will be very nice. Or
>>>>>>just put them here. If you numbers are so good, like I see them, you should be
>>>>>>really proud to say them in public.
>>>>>What are you talking about? Its more to a chess program than a high NPS! Even
>>>>>when doing a brute force search. Perhaps the Fritz eval is more complex etc.
>>>>>etc. The proof is in the the chess game it plays, not the NPS.
>>>>If you will see all the best programs you will find that biggest part of them
>>>>have surprisingly close NPS, leaving aside few exceptions. When you will write
>>>>your program as amateur (and ever more on C) there are very few chances that
>>>>your NPS will come even close to those numbers. If your NPS is actually not only
>>>>close but even better that the best monsters numbers, you have good chance to
>>>>reach them all later.
>>>>I was amazed by 650K on 800Mhz with a reason. Recently I found that numbers of
>>>>NPS for this computers should be around 2 000 000 NPS for minimax. Only around
>>>>25% of those numbers should be really reachable when all the advanced technics
>>>>of search is used. It give around 400K for 800Mhz Pentium. Raaching 650K is more
>>>>that simply good performance.
>>>On my machine:
>>>Junior 6a roughly 250-300K NPS Rating 2650
>>>Fritz 6a roughly 300-350K nps  Rating 2650
>>>Crafty 17.x 180-200K nps Rating 2550-2600
>>>Hiarcs 7.32 50-75K nps Rating 2600
>>>Little Goliath 2000 300-500k nps Rating 2500-2550
>>>Phalanx roughly 50k nps Rating 2500
>>>and so on.  Arg NPS I see is roughly 100-200k on my machine by the strong
>>>amateurs and around 200K+ with the exception of Hiarcs.  Yet the difference in
>>>speed isn't much between the top amateurs engines and top commercials engines,
>>>so where does the strength lie?  In the evaluation functions.  Don't worry about
>>>nps, it has about as much meaning as BOGOMips do in linux.
>>Thanks for numbers! But on what computer?
>Using one of my 2 Celeron 400s.  (Dual Celeron 400 system.)



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