Author: Dave Gomboc
Date: 23:08:39 06/18/99
Go up one level in this thread
On June 18, 1999 at 22:48:44, James Robertson wrote: >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 AFAIK Great Britain _does_ use SI units now... the US is always resistant to change. :-) Dave
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