Author: William Bryant
Date: 15:26:19 06/23/99
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>IE the idea is that it takes two 3/4 ply extensions before you really extend >anything. And when you think of it, what this means is that the first 3/4 >ply extension is ineffective, but the next three of them extend the search >by one ply. Then the 5th does nothing, but the next three extend by one >ply: > >1000 1075 [no change] 1150 [1 extra] 1225 [2 extra] 1300 [ 3 extra] 1375 >[no change again] and so forth... > > >This isn't new at all... We were doing this in the 1970's... So, if you are in check at the same node that generates an additional 3/4 ply extension, that node gets extended a full 2 plies -- or does the no more than 1 ply at a time rule always apply -- and the extras just roll over to the next deeper node? William wbryant@ix.netcom.com
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