Author: Bas Hamstra
Date: 17:32:34 10/12/00
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On October 12, 2000 at 09:28:45, Steve Maughan wrote: >Bas, > >>I wouldnt suspect so. In my case the system of hashing doesn't seem to matter a >>lot. I tried 8 probes, 4 probes and Crafty's system. No big differences there. >>I tried to prove that Crafy's system did better at extreme depths, but even >>there it doesn't matter a lot. >> >>As for the cutfirst rate, I do over 93% average on WAC. But for example in the >>startposition I see 88% or so. I don't see how your hashing system would affect >>this much. > >I've managed to solve the hash table problem - it wasn't really a problem, just >the way I was counting the nodes. > >I've checked again and the cutfirst rate is actually 83% for the initial >position, which I am not happy with! I can't understand why it is so low when > I do the standard move order of Hash, Good Captures, Killer1, Killer2, > History, the rest. Any ideas? Do you throw away ATMOST type of moves from the hashtable? If you do it's basically the same as I do. Further you could sort rootmoves by nodecount, and that's pretty much what I know about it. But I have noticed that eval changes can affect that CF rate. And maybe you should rather take a couple of wac positions than the initial position. On WAC you should do over 90% average. >I see you're entering the Dutch. Is this you x88 or your bitboard program? >Are you still using C++ Builder? No the 0x88 is just a testbed, so the bitboard version that plays on FICS enters there. Maybe the next version will be 0x88, I am nearly brainwashed by Vincent :) I suspect 0x88 is faster. But in some ways bitboards is easier, for instance coding a good clear eval is very easy with bb's. My previous program's eval (sort of 0x88 but slow) was much harder to debug. I do use C++ Builder, but for the dutch NK I recompile with VC, it gives +25% speed at least. Ciao! Bas.
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