Author: Steve Maughan
Date: 01:37:39 01/01/01
Go up one level in this thread
Heiner, >>Yes. This is why when one raises alpha one must also cut the PV. > >I do not understand the "cutting the PV" part. Do you mean such a PV ends >with a "<HT>" TT-hit instead of more moves? Yes! >Maybe I should reread the corresponding part in Ernst's excellent book. >Maybe you should also do that ;-) I didn't know he covered it. I'll certainly give it a read. >> What is >>really happening is the deeper search info is being graphted onto the search. > >Graphted? Typo? Oops I mean 'grafted' (as in when a plant is grafted onto another) >I mean: Do you really not use the value from a TT entry if the depth >stored in the TT entry is larger than the depth demanded by the search? At the moment I'm raising alpha based upon the deeper search but not lowering beta. >>I think I'm finally started to get my head rpound this issue - it's being >>vexing me for days!! > >I know that feeling! Do not give up! >Draw some pictures. Construct a minimal demo case. etc Indeed I will. >Most of the time finally I find out that things are quite simple, and the >complex part was a misunderstanding ;-) > >Cheers, and a happy new year! (Here around it is already 2:10am) Happy New Year to you too!! Regards, Steve
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