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Subject: Re: Deep Blue afterthoughts

Author: Guido Schimmels

Date: 06:06:05 05/11/98

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>The only addition I would make to this report is a remark on the odd
>nature of the PV for Qb6 at ply 10. GM Ronen Har-Zvi pointed out to me
>that the move Qa7 in this PV is a simple blunder. How such a move can
>appear in a PV is just one more mystery.

The DB outputs of game 2 you've presented here, have already been
discussed
in an issue of the german magazine "CSS" quite some time ago.
The author says, DB does not propagate the PV from the leaves to
the root, as most PC-programs do. In order to save time, DB simply
looks up the PV in the hashtable, which he thinks explains for some
weird PV's.

Guido



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