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Subject: Re: Nolot test fun!

Author: Ernst A. Heinz

Date: 13:36:23 01/11/00

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Hi Bruce,

>Let's have another thread about the Nolot positions.

Yeah -- that is always serious fun!

>Here are my results as of now:

I put the results of "DarkThought WCCC'99" on a 500MHz Compaq
Alpha-21264 XP1000 right behind yours in the table below.

"DarkThought" searched each position for 15 min. The "(d = ...)"
information specifies the iteration depth at which the program
locked onto the solution move. The "[...]" data lists the move
"DarkThought" prefers for the positions it does not solve.

>   DT      Ferret  DarkThought WCCC'99
>           4x450   500MHz Alpha-21264
>   ------  ------  -------------------
>1  6hr              12:25 min (d = 12)
>2  2min   31sec       /       [Bf6]
>3                     /       [Be2]
>4  2.5hr              /       [Be2]
>5  2hr                /       [h4]
>6                     /       [Bd7]
>7  6hr                /       [Rb7]
>8                     /       [Re1]
>9  9min               /       [Rxc5]
>10 2min   11sec       /       [Bb3]
>11 5min   48sec     04:32 min (d = 15)

BTW, I am amazed how closely the solution times of "Ferret"
seem to correlate with those of "Deep Thought": except for
position #9, "Ferret" gets exactly those positions right that
"Deep Thought" also solved quickly. Maybe, this is another
indication for singular extensions working particularly well
with this test set.

>As of this moment I am starting a run at
>two hours per position.

Great, I try to do a run with 4h per position later.

Cheers,

=Ernst=

P.S.
WWW pages of "DarkThought" at http://supertech.lcs.mit.edu/~heinz/dt/.

"Scalable Search in Computer Chess" now at Amazon.de and MKP online.
http://www.amazon.de/exec/obidos/ASIN/3528057327/
http://www.mkp.com/books_catalog/3-52805-732-7.asp  :-)

Visit http://supertech.lcs.mit.edu/~heinz/node1.html for more
information about the book.



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