Author: Tom Kerrigan
Date: 12:07:21 07/27/00
Go up one level in this thread
On July 26, 2000 at 21:36:47, leonid wrote: >On July 26, 2000 at 20:51:07, Tom Kerrigan 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: >>>>>>>> >>>>>>>>>Hi! >>>>>>>>> >>>>>>>>>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, >>>>>>>>>Leonid. >>>>>>>> >>>>>>>>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. >>>>>> >>>>>>-Tom >>>>> >>>>>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. >>>>> >>>>>Leonid. >>>> >>>>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. >>>>Torstein >>> >>>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 >> >>I don't know what word you mean here, but it's definitely not minimax. > > >When you see all your nodes inside of ply, before finding your best value for >ply. > > >>>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. >> >>I'm not doing anything special. > >This is where my surprise lay. All the time it is possible that all my previous >verification are wrong somewhere. This is why I ask about details that look so >trivial. Recently I have seen in my program (something that presumably coincide >with other programs) as 20% NPS compared with my minimax NPS. Now I speeded my >program and those 20% reached 25%. Maybe you reached all 30% and it is from >where your high numbers come. I remember making some posts a few weeks ago about how there's very little difference between minimax NPS and alpha-beta NPS. Maybe you can search the archives for it. -Tom
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