Author: Eugene Nalimov
Date: 16:21:19 06/17/99
Go up one level in this thread
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. Eugene >Mel >>> >>>Eugene
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.