Author: Eugene Nalimov
Date: 09:47:54 09/22/99
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Please note that either I or Christoph Wirth produced incorrect file. Results are not directly comparable, as I produced DTM and he DTC, but his record DTC is greater than my DTM. Obviously, one of us is wrong. What makes matter worse, both of us run consistency check on generated files, and there were no errors... I'll try to modify my program to produce DTC and re-run it, but it will take some time. My results are consistent when you compare them with Stiller's - record DTM is always less than his DTC (KQQKQQ: DTC is 44, DTM is 50; KRRKRR: DTC is 18, DTM is 40). Eugene 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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