Author: Robert Hyatt
Date: 05:48:28 01/15/99
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On January 15, 1999 at 02:26:01, Kai Skibbe wrote: >On January 14, 1999 at 22:55:15, Robert Hyatt wrote: > >>I'm willing to do most anything, but I have no idea what is needed, since >>I don't know how they read the book, how their format looks, etc. IE it >>seems odd to have a book algorithm that works perfectly well already built >>into crafty and it can't use it... > >Hello Bob, > >why don´t you patch your winboard-engine to work with fritz ? The engine is >already running with full tablebase-support and using the crafty-book. The major >problem still is, that at every move the hashtables are cleared. But I think >this problem could be solved easily. Roland Pfister, the author of Patzer, has >already patched his code of his winboard-engine, so that the hashtables are not >cleared. I think patzer reocognizes the "fritz"-command, which is send to the >engine at the startup. > > >Best regards >Kai Firstly, I'm not a 'windows' programmer and don't know what has to be done to work with the fritz API. Hash table clearing is only one problem that I have described, but there are others. IE I carry lots of things from one search to the next, from killer moves, to history counts, to the PV from the last search, to the pawn hash stuff, and all of this gets wiped out when a bunch of moves are 'stuffed' into crafty. I at least assume that the interface makes sure that both engines are not 'pondering' or using 'permanent brain' (same thing of course) as it is very possible to turn it off in one, and leave it on in the other, and get some nasty results... IE if crafty 'ponders' it does no good since the move list gets stuffed in when the opponent moves. But it would certainly affect the match because it would eat 50% of the cpu while the opponent was thinking, and then throw that result away. So it would turn a PII/400 into a PII/200 as far as the other program was concerned. And it would make a difference in how things turned out. This is a mess, to say the least...
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