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Subject: Re: Hash tables and data-cache, some programmer stuff...

Author: Peter W. Gillgasch

Date: 12:05:33 01/18/98

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On January 18, 1998 at 14:22:47, Robert Hyatt wrote:

>On January 18, 1998 at 13:36:38, Ernst A. Heinz wrote:
>
>>On January 18, 1998 at 10:56:30, Robert Hyatt wrote:
>>>On January 18, 1998 at 09:47:40, Ernst A. Heinz wrote:
>>>>On January 18, 1998 at 07:36:26, Peter W. Gillgasch wrote:
>>>>
>>>>>00:01:00 6122978 nodes NPS: 101710.598007
>>>>
>>>>Hi Peter,
>>>>
>>>>in terms of NPS "Chess Demon" seems to be hellishly fast indeed --
>>>>congratulations!
>>>>
>>>>But what happened to your tree size? The current "DarkThought" needs
>>>>only 3.8 million nodes to complete iteration #11 of WAC #3.
>>>>
>>>>=Ernst=
>>>
>>>Could be explained by lots of things...
>>
>>Sure, I know that there are many plausible explanations. I just wanted
>>to hear one from Peter himself. :-)
>>
>>As far as I know him, Peter is an NPS addict. Thence, it is also
>>possible
>>for "Chess Demon" to be severely hampered in one way or the other in
>>order
>>to achieve very high NPS numbers. That's why I wondered about tree size.
>>
>>=Ernst=
>
>
>tell him to toss his move ordering out the window, and get rid of
>alpha/beta.
>Node counts will be phenomonal.  :)

First, this guy can't tell me anything.

Second, I am using SEE pruning, square safety considerations, I nearly
don't generate illegal moves, I use PVS, hashing etc. Just because I am
below 600 clock cycles per node without any assembly at all doesn't mean
that I wrote a loop the increments the node count only :)

I am finding the solution at iteration 3, Bob at iteration 6. Go figure.

For further details, well, I am sure that one of you two would make a
paper out of them, so I won't tell you that this time 8^)

Live and learn :)

-- Peter




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