Author: Uri Blass
Date: 12:03:49 02/06/04
Go up one level in this thread
On February 06, 2004 at 14:29:30, Thorsten Czub wrote:
>On February 06, 2004 at 12:19:09, Uri Blass wrote:
>
>>Here is the line of the game that you posted
>>
>>14...Qc7 {-0.30/18} 15. Bxh6 gxh6 {-0.40/15} 16. Qxh6 Rfd8 {-0.54/16}
>>17.Rd3 Nh7 {0.00/17} 18.f4 Bf8 {0.01/18} 19.Rg3+ Kh8 {0.01/18} 20. Qh5 Rab8
>>{0.35/17} 21.f5 exf5 {0.85/16} 22.Rf1 Rd7 {0.84/19} 23.Rxf5 f6 {0.84/18
>>
>>You can see that shredder evaluated the position as 0.54 pawns for itself at
>>move 16 and it is more than 0.30 pawns for itself at move 14.
>
>right. right.
>but it is 18 searches deep !
>
>in move 20 (that is 12 searches away from Qc7 it feels negative, and in move
>21 even morenegative.
>
>how can the program oversee this, when it sees the things different within
>12 plies later.
>
>>I believe that not pruning could not help shredder to avoid Qc7 and I am also
>>not sure if it was the losing error(I suggested 17...Ne8 instead of 17...Nh7).
>>
>>Uri
>
>shredder itself changes the score from + into minus within a few moves.
>
>in between there is the fritz-like 0,00.
>
>if shredder itself sees now the weakness, why wasn't it able to see the obvious
>move earlier ? it pruned it away-
>if the move was wrong, why the score dropping ??
I believe that the following claims are correct:
1)The move Bxh6 was wrong but shredder blundered later(I suggested 17...Ne8
instead of 17...Nh7)
2)Shredder searched 15.Bxh6 to reduced depth but this is not the reason for
playing 14...Qc7(otherwise shredder could see a drop in the score immediatly
after 15.Bxh6 and it did not happen)
Uri
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