Author: Uri Blass
Date: 11:07:51 09/22/00
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On September 22, 2000 at 09:48:49, Kim Roper Jensen wrote: >Hi All > >I saw the post about variable selectivity, and wondered. > >How about having a "turbulence" ( this comes from an article in the book >Computer chess Compendium ) variable, that is defined by the number of moves in >the position, like high number of moves its a open position, the pieces have >more squares to go to, low number of moves the pieces have less squares to go >to. Then the selectivity could be adjusted so at high turbulence the selectivity >should be low( more tactical traps so we have to look at more continuations), >low turbulence the selectivity should be high( more positional traps so we have >to look at less continuations, but deeper on the positions) > >Is this something thats tried ?? I think the opposite idea is better. When the position is open there is no zunzwangs so the selectivity should be bigger(I assume that the meaning of selectivity is null move pruning) If selectivity means pruning not because of null move then it may be a good idea to have bigger selectivity in some endgames because you can evaluate more moves as illogical(for example if there are pawns only in one side and the king go to the other side to increase the ditance to the pawns then this move is usually illogical so you can prune it) Uri
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