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Subject: Re: The Dangers of Positivism with Numbers

Author: Mike Byrne

Date: 07:42:42 11/02/03

Go up one level in this thread


What is interesting here is how it steps down in pairs up to the 11 ply -
perhaps giving credence to the old chess adage that every other odd ply is more
beneficiary than the even ply.

On November 02, 2003 at 07:53:42, Rolf Tueschen wrote:

>"Rebel maintains a table in SEARCH.TXT. It records every change of best-move per
>ply. Here are the contents of one of my autoplayer PC's, it clearly shows the
>decreasing importance per iteration."
>
>>>                SEARCH OVERVIEW
>
>>>                ===============
>>>Depth    Moves          Moves        Big Score
>>>      Searched        Changed        Changes
>>> 1      83591        0 =  0.0%        0 =  0.0%
>>> 2      82195    32077 = 39.0%    20786 = 25.3%
>>> 3      81737    24348 = 29.8%    13022 = 15.9%

>>> 4      80428    20153 = 25.1%    7033 =  8.7%
>>> 5      80134    19940 = 24.9%    7969 =  9.9%

>>> 6      79135    17344 = 21.9%    6014 =  7.6%
>>> 7      78694    15903 = 20.2%    5940 =  7.5%

>>> 8      77710    14294 = 18.4%    4918 =  6.3%
>>> 9      75240    12888 = 17.1%    4769 =  6.3%

>>>10      67180      8933 = 13.3%    2816 =  4.2%
>>>11      54813      7240 = 13.2%    3223 =  5.9%



after 11 ply the pattern breaks ...



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