Author: James Robertson
Date: 19:48:44 06/18/99
Go up one level in this thread
On June 17, 1999 at 19:38:52, Eugene Nalimov wrote: >On June 17, 1999 at 19:32:49, Melvin S. Schwartz wrote: > >> >>On June 17, 1999 at 19:21:19, Eugene Nalimov wrote: >> >>>On June 17, 1999 at 18:49:18, Melvin S. Schwartz wrote: >>> >>>> >>>>On June 17, 1999 at 18:41:09, Mark Young wrote: >>>> >>>>>On June 17, 1999 at 18:33:50, Eugene Nalimov wrote: >>>>> >>>>>>On June 17, 1999 at 17:58:22, James T. Walker wrote: >>>>>> >>>>>>>I finished my first 200 games today between Fritz 5.32 and Hiarcs 7.32. The >>>>>>>games were played at game/5min. They were run using auto232 operation. Fritz >>>>>>>had a K6-2-400 for 100 games and then swapped and took the PII 333 for the >>>>>>>second 100 games and vice versa. Fritz used the F5 opening book and Hiarcs used >>>>>>>it's own book. Hiarcs had all 3/4 man tablebases plus the 5man tablebases >>>>>>>supplied on the CD plus about 10 more 5 man tablebases. (I don't have them all) >>>>>>>Fritz won the match 106.5-93.5 indicating about a 22 point superiority at blitz. >>>>>>> Of course only 200 games leaves some doubt and I will run another set later but >>>>>>>now I want to play 200 games with Hiarcs 7.32 vs Junior 5.0. By the way Hiarcs >>>>>>>turned at least one win into a draw because of the tablebases. It was a KPPKP >>>>>>>endgame which is supplied with the Hiarcs CD. The problem is there is no KQPKP >>>>>>>tablebase so when Hiarcs got the pawn to the 2nd rank (With Black) it did not >>>>>>>know how to win the game and got stuck in 3 time rep with Mate in 7 showing in >>>>>>>the window?! I had this same problem with another program which prompted a >>>>>>>question a few weeks ago. Bob Hyatt says that the only way to use the >>>>>>>tablebases is to have them all. I believe it but apparently some programmers do >>>>>>>not. At a minimum you need the promotion tablebases if you have the pawn >>>>>>>tablebases. >>>>>>>Jim Walker >>>>>> >>>>>>Actually, there is a solution for a missing promotion TBs. It was suggested >>>>>>several times in the Crafty mail list, but Bob is unwilling to implement it - my >>>>>>guess is that it is going against his sense of aesthetic, because it work not >>>>>>100% of the time: >>>>>> >>>>>>(1) If you have MATE-in-M in the root position, >>>>>>(2) No one of the moves lead to MATE-in-(M-1), >>>>>> >>>>>>Then throw away the moves that lead to TBs draws, loses, or MATE-in-(>=M), turn >>>>>>off TB probing for N pieces (where N is # of the pieces at the root), and start >>>>>>normal search. There is some analogue between this approach and current approach >>>>>>when Crafty tries to exploit opponent's error in a draw position - if it's ahead >>>>>>on the material in the draw position, it throw away losing moves and searches >>>>>>remainining once with it's normal evaluation function. >>>>>> >>>>>>Of course Bob will say that the full TBs set can reside at a $120 disk. The >>>>>>problem is that not many people (let alone IMs and GMs) will spend $120 for that >>>>>>dedicated disk. >>>>>> >>>>>>BTW, were there games at WCCC9 where TBs affected the result? If I remember it >>>>>>correctly, somebody here is doing his/her private match between Hiarcs and >>>>>>Fritz, and among the first 10 games 4-man TBs already helped Hiarcs. So, 0.5 >>>>>>points from 10. >>>>> >>>>>I put 512MB of ram in my computer the max for my mother board. The TB generator >>>>>says it takes more memory then this to create the KQPKQ TB. Im I out of luck, or >>>>>will it still create the TB using disk memory? >>>>> >>>>Hello Mark, >>>> >>>>I believe you need about 8 gigs of space available to get the full Nalimov >>>>tablebases on your harddrive. For just the 4-man tablebases I believe less than >>>>2 gigs will do it. >>> >>>5.9Gb for the entire 3+2 man set. All 4 man *plus* KRPKR *plus* KRPKR promotions >>>occupy 294Mb. >> >>Hello Eugene, >> >>I know that 3 feet equal 1 yard but 294MB? Is that 29GB? >>Why did you use GB in the first sentence and then KB in the second sentence? Are >>you trying to confuse me? :) >> >>Mel> >>>Eugene >>> >>>>Mel >>>>>> >>>>>>Eugene > >Hello Mel, > >I learn that 3 feet equal 1 yard only 2.5 years ago... But at least now I know >that! > >1Mb is (roughly) 1/1000 of 1Gb. So 294Mb is ~0.294Gb. > >Eugene Too bad the English didn't adopt the metric system.... now us Americans are stuck with the horrible thing too!! James
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