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Subject: Re: Deep Blue afterthoughts

Author: Vincent Diepeveen

Date: 07:20:27 05/11/98

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On May 11, 1998 at 09:06:05, Guido Schimmels wrote:

>>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.

I'm doing this to: i only look in the hashtable. You get exactly
the same PV. the 2 advantages are:
  -it is faster
 - sometimes you get a little longer PV because of transpositions that
   extend your PV.
>Guido



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