Author: Vincent Diepeveen
Date: 04:12:34 10/11/02
Go up one level in this thread
On October 11, 2002 at 04:08:49, Uri Blass wrote:
Isn't his article clear enough yet?
reporting a 12.2 average search depth fullwidth.
I guess you never searched with a decent program fullwidth
with extensions. If you did, you would understand that
getting 12.2 ply fullwidth with loads of extensions is already nearly
impossible. Every extended line is searched to the full depth,
no pruning happens!
The interesting 2 questions are
a) did DB use 'no-progress pruning' in SOFTWARE (we know
already it used it in hardware).
b) did DB use other forms of forward pruning in hardware search,
other than 'no progress'.
The paper indicates they used no progress as only pruning form.
All other things are already sharp clear from his paper.
>On October 11, 2002 at 03:22:46, Bradley Woodward wrote:
>
>>According to ICC's news 1646, on Sunday October 13, Feng-Hsiung Hsu (also known
>>as Crazy Bird or CB) will be on ICC to answer your questions and discuss his
>>work on
>>Deep Blue. His handle is "CrazyBird".
>>
>>Could be interesting. Now my question is: after he's said "No - there was no
>>cheating", how many people will believe him?
>>
>>The chat starts at 1pm, ICC server time, or delayed a bit if the Fritz - Kramnik
>>match is still going on.
>
>1)Do people need to be ICC members to participate in the chat or
>can guests also participate?
>
>2)Can somebody ask him about the real software and hardware depth of
>Deep blue of 1997 to remove doubts about it.
>
>The questions are:
>
>1)What does 12(6) mean.
>Does it mean 12 plies in the software+6 plies in the hardware
>or total 12 plies.
>
>2)If he says 12 plies in software+6 plies in hardware then
>next question:
>
>Did the software searched with no pruning.
>
>3)If the answer is positive than how it is possible to do it.
>It is impossible for programs to search 12 plies
>with no pruning in normal middle game positions when
>they search 500,000 nodes per second.
>
>126,000,000 nodes per second is clearly more than 500,000
>nodes but only 252 times bigger and it does not seem enough
>to search 6 additional plies to the impossible 12 plies.
>
>Uri
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