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Subject: Re: The 16 ply challenge restated

Author: Uri Blass

Date: 00:38:21 09/16/00

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On September 15, 2000 at 21:07:01, Dann Corbit wrote:

>On September 15, 2000 at 18:31:22, Gian-Carlo Pascutto wrote:
>[snip]
>>>Semantics.  It expands the depth of the search on each new iteration.  Call it
>>>what you want, it's depth in plies.  I do know that you have special extensions
>>>for recaptures, etc. but that could be considered a type of pruning.
>>
>>Utter nonsense.
>>
>>By this definition, I have a program that can search over 1000 plys.
>
>No you don't.  You only have one that can search special lines 1000 plies.  It
>does not complete the ply for each of the 1000 plies.

Top programs also do not see everything for 16 plies when the depth is 16
because they use null move pruning or other pruning ideas and they can miss
important lines because of it.

If you want 16 plies with no pruning that can cause program to miss important
lines then  all programs need years to do it.

Uri



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