Author: Andrew Williams
Date: 02:29:52 08/10/01
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On August 10, 2001 at 02:54:39, José Carlos wrote: >On August 09, 2001 at 13:48:08, Alvaro Jose Povoa Cardoso wrote: > >>>Note that my hash table has two scores and two drafts per position. >>> >>>Hope this is useful. >>> >>>Andrew >> >> >>Could you please explain why your hash table has two scores and two drafts per >>position? >> >>Thank you, >>Alvaro Cardoso > > If I'm not wrong, he uses MTD(f). MTD(f) relies on failing high or low >everywhere, using null windows, instead of calculating "true" values with an >open window. So, in MTD(f), it's very important to have an upper and lower bound >for every node in the hash table, so that you have relevant information no >matter if the true value lies above or below your null window. > > José C. Sorry Alvaro, I didn't see your post yesterday. Jose is correct, of course. Andrew
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