Author: Christophe Theron
Date: 19:23:09 09/05/03
Go up one level in this thread
On September 05, 2003 at 18:05:07, Jaime Benito de Valle Ruiz wrote:
>My Shredder 7 finds the winnning move in 8 seconds.
>But I wonder if it has a function in the Root Search to consider some special
>improbable lines without pruning or any other trick.
>
>If we create an imaginary position that could have been existed 1 ply before
>this thread's position:
>
>[d]6k1/q2QppP1/b3p3/Pp1pP1PN/1PpP4/2P5/8/1BK5 b - - 0 1
>
>...and repeat the test,
>
>Shredder 7 after 25 minutes (in infinite search) still gives a score of -5.09 at
>depth 23/49, but if we let it move and search again, it needs only 6 seconds to
>give +2.99 (depth 14/33), and 8 seconds to give +4.05 (depth 17/25)!!!
>
>Any theories?
>
>Regards
Maybe the decision to use or to not use some pruning techniques (null move for
example) is decided at the root in Shredder.
Sounds like the most likely explanation to me.
Christophe
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