Author: Robert Hyatt
Date: 06:48:53 09/23/99
Go up one level in this thread
On September 23, 1999 at 09:26:13, Peter Marko wrote: >Hi, > >Guy Haworth has asked me to take the baton from him and organize making this >wonderful new tool available to the World Team in the Kasparov vs. The World >interactive game. At this point I am wondering about the following: > >1. It is my understanding that Crafty needs minor modifications before it could >be used with the new KQQKQQ tablebases. When will this happen? I saw Robert's >post in this thread about a new version of Crafty being readied last night (Sep >22). > there is a small glitch... the IInitializeTb() function is returning 5, even when there are 6 piece files handy. This would normally be innocent enough, but I use this number to tell me when to start probing... as a result, I never probe 6 piece files... I have sent this to Eugene. I have been busy on a SPEC problem and didn't have time to try to figure out how to make his code return 6 with the kqqkqq files are present... >2. Is there any change in Crafty's system requirements when one uses it with the >6-man tablebases? couple of megs more memory for the decompression indices... > >3. The tablebases are very large, and downloading them is not an option for most >users. Is there a chance of having them available on CDs? Anyone could do this... But it is an investment in time to burn the things and distribute them... > >My plan is to announce the availability of Crafty and the four-Queen tablebases >on the World Team Strategy Bulletin Board > >http://bbs.msnbc.com/bbs/kasparov-team/index.asp > >after all the details have been worked out at this forum. I would like to have a >few chess computer enthusiasts to take on the challenge of installing the new >Crafty with the 6-man EGTBs and making them available to the World Team. > >Please advise as to the above questions on this board or via e-mail >(pmarko@netcom.ca). > >Thank you and best regards, > >Peter > > >On September 22, 1999 at 09:35:46, guy haworth wrote: > >>This note contains a request - for Robert Hyatt I think ... >> >>As CCC readers may be aware, Eugene Nalimov and Christoph Wirth have >>independently created a complete and self-consistent KQQKQQ endgame database. >> >>Both authors responded readily to the request of the World TEam (in GK-v-WT) and >>their achievements are without parallel. Many thanks and warmest >>congratulations to both. >> >>Eugene's is optimised to DTM (distance to mate)and Christoph's to DTC (capture >>or mate). However, they can clearly be used to second-source each other on the >>value of a KQQKQQ position. This gives more authority to both databases. >> >>A number of players involved in the Kasparov-v-WorldTeam event (and others) will >>now be thinking of using this KQQKQQ database and this leads to thoughts about >>the practicality of doing this. There appear to be two issues. >> >>The KQQKQQ database is a 6-man rather than a 5-man database and as such, I >>understand requires a modification to standard CRAFTY. >> >>It is also a very large database (407503Kb) and is presumably difficult to >>download in the standard way. >> >>May I ask Robert to define on this CCC board how to make the modifications to >>CRAFTY to use 6-man EGs ... and how the KQQKQQ database itself may be best >>acquired. >> >> >>As a footnote, both Eugene and Christoph 'warmed up' their codes on KNNKNN and >>KRRKRR. Eugene later produced a KBBKBB EG-db as well. All four of Eugene's >>datbases are on ftp://ftp.cis.uab.edu/pub/hyatt/TB/. >> >>As a technical footnote, Eugene used a Compaq Alpha procesor with 4GB RAM and >>ran the problem 'in store'. Christoph had 1GB RAM and therefore sustained some >>100GB of 'paging' disc traffic. Both databases are post-hoc checked to ensure >>that the value/depth of a position is consistent with that of its successors. >> >>Again, thanks and congratulations to both Eugene Nalimov and Christoph Wirth.
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