Author: Dann Corbit
Date: 06:15:41 09/23/04
Go up one level in this thread
On September 23, 2004 at 05:54:57, Peter Fendrich wrote:
>No, but by also counting in the pieces weight they are a good starting point.
>With weight I mean that higher valued pieces are more vulnerable on squares
>where the opposite colored pieces have high PST-values.
>BTW wouldn't it make more sence to set zeroes for the 1st and 8th rows in the
>pawn table?
No. If you move a pawn to that rank, that is how many squares it affects on the
next move. (Q+N)
>
>On September 22, 2004 at 21:02:16, Dann Corbit wrote:
>
>>static const unsigned rook_reach[64] = {
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14,
>> 14, 14, 14, 14, 14, 14, 14, 14
>>};
>>
>>static const unsigned bishop_reach[64] = {
>> 7, 7, 7, 7, 7, 7, 7, 7,
>> 7, 9, 9, 9, 9, 9, 9, 7,
>> 7, 9, 11, 11, 11, 11, 9, 7,
>> 7, 9, 11, 13, 13, 11, 9, 7,
>> 7, 9, 11, 13, 13, 11, 9, 7,
>> 7, 9, 11, 11, 11, 11, 9, 7,
>> 7, 9, 9, 9, 9, 9, 9, 7,
>> 7, 7, 7, 7, 7, 7, 7, 7
>>};
>>
>>static const unsigned knight_reach[64] = {
>> 2, 3, 4, 4, 4, 4, 3, 2,
>> 3, 4, 6, 6, 6, 6, 4, 3,
>> 4, 6, 8, 8, 8, 8, 6, 4,
>> 4, 6, 8, 8, 8, 8, 6, 4,
>> 4, 6, 8, 8, 8, 8, 6, 4,
>> 4, 6, 8, 8, 8, 8, 6, 4,
>> 3, 4, 6, 6, 6, 6, 4, 3,
>> 2, 3, 4, 4, 4, 4, 3, 2
>>};
>>
>>static const unsigned pawn_reach[64] = {
>> 23, 24, 25, 25, 25, 25, 24, 23,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 1, 2, 2, 2, 2, 2, 2, 1,
>> 23, 24, 25, 25, 25, 25, 24, 23
>>};
>>
>>static const unsigned king_reach[64] = {
>> 3, 5, 5, 5, 5, 5, 5, 3,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 5, 8, 8, 8, 8, 8, 8, 5,
>> 3, 5, 5, 5, 5, 5, 5, 3
>>};
>>
>>static const unsigned queen_reach[64] = {
>> 21, 21, 21, 21, 21, 21, 21, 21,
>> 21, 23, 23, 23, 23, 23, 23, 21,
>> 21, 23, 25, 25, 25, 25, 23, 21,
>> 21, 23, 25, 27, 27, 25, 23, 21,
>> 21, 23, 25, 27, 27, 25, 23, 21,
>> 21, 23, 25, 25, 25, 25, 23, 21,
>> 21, 23, 23, 23, 23, 23, 23, 21,
>> 21, 21, 21, 21, 21, 21, 21, 21
>>};
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