Author: guy haworth
Date: 06:35:46 09/22/99
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.
This page took 0.01 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.