Author: Uri Blass
Date: 09:19:09 02/06/04
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On February 06, 2004 at 12:02:02, Thorsten Czub wrote:
>IMO the problem is not the many evaluations you could invent, the problem is
>that the SEARCH says: we prune this position because of XYZ reason.
>and suddenly you could have the bEST ideas, the program will not see it.
>
>Take the game CSTAL Shredder, the reason is: why has shredder not seen Bxh6 ?
>it was pruned away !
>because shredder thought: it is not working.
>
>WHY did it think it is not working: because it saw no sense in the moves.
>when the moves came on board, and shredder was unable to PRUNE,
>it saw the problem. with evaluations !
No
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.
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
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