Author: Eugene Nalimov
Date: 09:51:15 09/22/99
Go up one level in this thread
Oops, I read Wirth's letter not carefully enough... He measures plies, not moves. Than everything is Ok. Sorry for inconvenience... Eugene On September 22, 1999 at 12:47:54, Eugene Nalimov wrote: >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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