Author: Brian Richardson
Date: 20:28:43 08/24/02
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On August 24, 2002 at 20:08:22, Scott Gasch wrote: >On August 23, 2002 at 14:48:19, Brian Richardson wrote: > >>On August 23, 2002 at 14:41:11, Dann Corbit wrote: >> >>>http://www.talkchess.com/forums/2/message.html?41900 >> >>This looks like an interesting variation on internal iterative deepening IID, >>but with generally deeper sub-searching. > >It sounds like he is doing this reduced depth search at _every_ node where there >is no best move from the hash table. I have no implemented IID in my own engine >but my understanding of the concept is that it is only applied at PV nodes where >there is no best hash move typically. Is this correct? I think so, IIRC. In Tinker, the IID search is only done when the prior ply move was the PV move and there is no hash, killer or PV move at the current ply. IID results varied a lot for Tinker, from a few percent slower in some positions, to up to 30% faster in others. > >Scott
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