Author: Uri Blass
Date: 15:19:06 12/02/05
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On December 02, 2005 at 18:01:04, Tord Romstad wrote: >On December 02, 2005 at 17:16:41, chandler yergin wrote: > >>How many times do I have to paste this? >>"Engines evaluate all moves 1/2 move i.e. 1 Ply at a time." >>Nothing more.. nothing less. > >As Wolfgang Pauli once said: This isn't right. It's not even wrong. > >What you say above is utterly meaningless, confused, and unintelligible. >There are many different ways to interpret your two lines above, but they all >have two things in common: They are incorrect, and they have no relevance >whatsoever when trying to explain why your Shredder gives incorrect output >when analysing the position we are discussing. > >>The deeper the search the better the evaluation. >>On deeper search it found there was only a Mate in 14. > >No, this can never happen, unless the program has a bug, or the operator >makes an error. > >Tord Or it prints different output on purpose but I do not know of a single program that does it. Suppose that a program see mate in 14 at depth 12. It is clear that it is mate in 14 or shorter mate. The programmer may find based on statistics that when the program says mate in 14 at depth 12 it is in average mate in 11 moves so he may tell the program to write mate in 11 instead of mate in 14 and when it search deeper it may go down to mate in 11.7 and mate in 12.3 and continue to go down in case that the program does not find a faster mate. Uri
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