Author: Peter Kappler
Date: 13:12:51 08/24/05
Go up one level in this thread
On August 24, 2005 at 15:11:46, Robert Hyatt wrote: >On August 24, 2005 at 14:24:08, Ryan Peters wrote: > >>Can anyone verify that the 6man EGTB files Kbp v Kbp from the Crafty site >>ftp://ftp.cis.uab.edu/pub/hyatt/ are "clean" ? >> >>I have downloaded the 7 files twice now. >> >>kbpkbp.0.nbw.emd >>kbpkbp.1.nbw.emd >>kbpkbp.2.nbw.emd >>kbpkbp.3.nbw.emd >>kbpkbp.4.nbw.emd >>kbpkbp.5.nbw.emd >>kbpkbp.6.nbw.emd >> >>The Wilhelm utility v1.48 flags all as "defective" and in particular says that >>the last one kbpkbp.6.nbw.emd is corrupted. This is the lastest version of >>Wilhelm, but I am not sure that I trust this utility :). When I try to use them >>in either Deep Shredder9 UCI GUI or the lastest Chessbase GUI I get "wierd" >>results. I am successfully using many other 6man EGTB's downloaded from the >>Crafty site. Just this set is causing problems. >> >>Ryan > > >You might need to wait for the next version of that program. Prior to building >one of these tables, eugene has only a "gut-feeling" about whether an 8 bit >value is enough or not. He then plugged in his "gut feeling" into the egtb.cpp >code and we distributed it to the world. Every now and then his "gut" was >wrong, and there is a deeper mate than expected, which requires a 16 bit value >rather than an 8 bit value. This is encoded in the egtb.cpp source file and >requires a simple change to update. The current crafty source has the most >recent egtb.cpp changes if you want to compare to see what is probably wrong... > >You either need a new egtb.cpp, or else don't try to use that particular set of >table files... What's the deepest mate you've seen in the 6-man tables? -Peter
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