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Subject: Re: Starting position to 30 ply

Author: Dan Newman

Date: 11:15:25 06/05/01

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On June 05, 2001 at 05:40:22, Daniel Clausen wrote:

>Hi
>
>On June 04, 2001 at 22:45:44, Robert Hyatt wrote:
>> It is so close to perfectly ordered that it can be called "perfectly ordered"
>> with no danger of being wrong enough that it can be measured.
>
>Let's hope that no mathematician ever quotes you on this. ;)
>
>Still it's amazing to me to reach 30 plies that fast. (or in PM's case even
>faster) 30 plies w/ perfect alpha-beta should be 15 plies w/o alpha-beta, right?
>
>I don't know about your engine but a 15-ply search w/o alpha-beta from the
>initial position is.. welp.. out of the question. :) Maybe null-move helps with
>this a lot? or I am missing something obvious? Or both? :) What approx. depths
>would a non-MTD(f) engine reach in the same experiment?
>
>Regards,
>
>Sargon

Shrike, a PVS engine, got through depth 29 in 8.3 hours, 35 billion nodes
(with material-only eval and extensions turned off on a P3/933).  Makes me
want to try MTD(f) :).

-Dan.



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