Author: Robert Hyatt
Date: 05:02:56 01/19/99
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On January 18, 1999 at 22:05:41, James T. Walker wrote: >I got Crafty 16.3 to work (Partially) today in the Fritz 5.32 GUI using the >winboard adaptor. It was playing Fritz 5.32 when it got to the endgame and was >using it's EGTB's. It had #27 for a score and went down to #8. At that point >it repeated the position 3 times for a draw ??? My TB files are dated 11/7/98. >Question is, are they bad? Should I downloadd all TB's again? >Jim Walker this is a bug, probably caused by your machine having a slow disk (or else trying to use tablebases from a CD. What happens is that when the NPS value drops below a certain threshold, crafty starts throttling the depth at which it probes the tablebases. And on slow disks, it is possible that it can really reduce the depth. So far that it might not even probe at depth=2 for one iteration. And if that iteration is the _last_ iteration because it is in a tablebase at the root, it won't probe at all, but still will exit the search after 2 plies. I found this and have fixed it in 16.4, but am still working on the 'throttle' code as it is reacting too sluggishly...
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