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Subject: Re: Strange behaviour of Shredder 8.

Author: Jaime Benito de Valle Ruiz

Date: 09:57:00 06/16/04

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On June 16, 2004 at 12:48:27, George Tsavdaris wrote:

>On June 16, 2004 at 12:12:17, William Penn wrote:
>
>>How long did you let it calculate?
>>One second?
>>An hour?
>>In infinite analysis mode, or what?
>>In complex positions, it may take Shredder 8 (or any engine) a long time to find
>>the best move.
>>-WP
>
> This is not a complex position. The capture for black wins a Knight for a Pawn
>with no other danger for black. Also ALL other engines i tried find this and
>evaluate it correctly in less than a second, except Shredder. Also Shredder
>evaluates the position after hxg5 as a huge advantage for black immediately
>(from 9th ply), while even at 15 ply it shows a small advantage for white before
>the move.

I agree: It's not a terribly complex position, and Shredder evaluates the
position properly if you start the search after taking the knight (with hash and
learning clear) in just a few plies. I'd think it's a pruning problem, but
then... why is this knight capture Shredder's second choice?

Jaime



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