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Subject: Trick in the root search?????

Author: Jaime Benito de Valle Ruiz

Date: 15:05:07 09/05/03

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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



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