Author: Eugene Nalimov
Date: 17:01:30 09/22/99
Go up one level in this thread
One more thing: you'll be able to use TB name where first dot is replaced by underscore. Probably that will reduce number of questions "I downloaded a lot of TBs, but Crafty does not see them". Eugene On September 22, 1999 at 19:53:14, Robert Hyatt wrote: >On September 22, 1999 at 09:50:08, Robert Hyatt wrote: > >I have gotten the new tbindex stuff into crafty. I will try to release a new >version later tonight that has this. It will probably have everything current >except for the new majority stuff I am still tweaking. > >Latest version has three improvements of interest: > >1. it outputs 'insane' (or redundant) FEN. :) Every rank has 8 squares >specified, no trailing "/". > >2. You can just cut and drop fen right into crafty without the 'setboard' on >the front. It will take it just fine. If the position is a known tablebase >position, it will give you the full mating/drawing line automatically (I may >disable this later, see 3 below) > >3. there is another use for the 'egtb' command. after using it to enable >tablebases, you can say "egtb" and get the full (optimal) PV for the current >position, if it is a TB position. If you say "egtb !" it will append a ! to >any move where there is only one best choice and all others are inferior... > >More later... > > > > > >>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. >>> >> >> >>There are two parts to this. I haven't done them yet, because I am in the >>middle of testing the pawn-majority code I have added, and I try to limit >>changes to one area to avoid going nuts debugging. >> >>1. the actual source for crafty doesn't have to be changed. I fixed this >>months ago. Eugene reports the number of pieces I should use to probe the >>databases and I use this number. If you put a 6 piece file out there, I'll >>probe it. >> >>2. egtb.cpp is the place where it must be changed. This needs to have the >>old probe code of his removed (the tbindex stuff) and the new code added (the >>new code is on the ftp machine in tbgen_nw.zip). That is the only real change >>and it should be easy. It will hopefully become a part of the next version if >>I have time to merge it in, since it doesn't slow anything down (it will take >>a special compile to enable 6 pieces probably, I don't know what including their >>support will do memory-wise if you don't have any. Eugene?) >> >> >> >> >> >> >> >>> >>>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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