Author: José Carlos
Date: 15:57:54 12/20/04
Go up one level in this thread
On December 20, 2004 at 18:43:19, Uri Blass wrote: >On December 20, 2004 at 18:31:56, Dann Corbit wrote: > >>On December 20, 2004 at 18:27:37, Uri Blass wrote: >> >>>On December 20, 2004 at 18:22:24, Dann Corbit wrote: >>> >>>>On December 20, 2004 at 16:32:24, Jouni Uski wrote: >>>> >>>>>Shredder 8 reaches quite stunning averaga search dept. E.g. with only 15 >>>>>second/move average with Pentium 2400 and 128MB hash it averages 15,2 ply! For >>>>>comparison Fritz Bilbao and Gandalf 6 reach both same 12,7 ply. No wonder >>>>>Shredder beats them 13 - 7 and 14 - 6. Of course 2,5 ply is a lot difference! >>>>>Is there any amateur or pro engine, which can equal Shredder in depth - Junior's >>>>>half plys can be forgotten. >>>> >>>>I can write an evaluation function that only counts the wood. It will beat >>>>Shredder's depth, but Shredder will easily kill it on a 1/10 as powerful machine >>>>all the time. >>> >>>Only writing evaluation that only count wood will not be enough to beat >>>shredder depth. >> >>A simple PVS with null move and wood counting only will get 19 plies in a few >>seconds. Is that what you mean by pruning? > > >In what position? >I never had only wood counting but I guess it is dependent on the position and >in tactical position when there are many threats to win material it may get >smaller depthes. > >Uri Only material eval gives much more cutoffs in alphabeta because most evals are equal, so basically everything that doesn't lose material (compared to the PV) gets immediately pruned. José C.
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