Author: Robert Hyatt
Date: 17:51:59 06/23/99
Go up one level in this thread
On June 23, 1999 at 18:26:19, William Bryant wrote: > >>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 I _never_ add more than 1 ply at any ply. I may add exactly 1 ply which means that the depth doesn't change when I recursively call search. But I never go beyond 1 ply at any level in the tree... otherwise a non-terminating search can happen...
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