Author: Uri Blass
Date: 20:01:38 09/21/04
Go up one level in this thread
On September 21, 2004 at 22:44:33, Robert Hyatt wrote:
>On September 21, 2004 at 21:53:47, Dann Corbit wrote:
>
>>On September 21, 2004 at 19:41:42, Stuart Cracraft wrote:
>>[snip]
>>>// white knight
>>> {
>>> OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF,
>>> OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF,
>>> OFF, 64, 41, 60, 67, 67, 60, 41, 64, OFF,
>>> OFF, 48, 79, 91, 76, 76, 91, 79, 48, OFF,
>>> OFF, 57, 86, 95, 111, 111, 95, 86, 57, OFF,
>>> OFF, 77, 105, 123, 129, 129, 123, 105, 77, OFF,
>>> OFF, 99, 124, 129, 145, 145, 129, 124, 99, OFF,
>>> OFF , 79, 114, 116, 144, 144, 116, 114, 79, OFF,
>>> OFF, 53, 77, 108, 81, 81, 108, 77, 53, OFF,
>>> OFF, 0, 71, 73, 73, 73, 73, 71, 0, OFF,
>>> OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF,
>>> OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF, OFF
>>> },
>>
>>A value of 64 for A8 and H8 seems highly suspect to me. Similarly for A1 and H1
>>for the black knight.
>
>
>Any positive value for _any_ square on the edge of the board seems to be more
>than "a bit suspect". They look outright _wrong_...
values are relative so I see no problem with non negative values
I have only positive values in my piece square table.
Everything that worth more than nothing is positive for me.
I have not one value for the knight but 64 values based on the square of the
knight.
I see no reason to have special value for the knight except 64 values when 64
values already give all the picture.
If I want to evaluate black knight at c3 then
pcsq[KNIGHT][c3] give me the relevant information and if you want to evaluate
white knight at c3 then pscq[KNIGHT][flip[c3]] can give you the same
information.
>
>The problem is that it is very likely that the pc/sq values are not independent
>variables, they are closely associated with other eval terms modified during the
>tuning. Trying to transplant them to a different program/evaluation is a
>mistake...
I agree about it.
Uri
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