Author: Melvin S. Schwartz
Date: 16:32:49 06/17/99
Go up one level in this thread
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
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