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Subject: Re: Does your program see the winning sequence in this position?

Author: Djordje Vidanovic

Date: 12:04:35 03/04/00

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On March 04, 2000 at 13:52:43, Ed Schröder wrote:

>On March 04, 2000 at 12:56:41, Djordje Vidanovic wrote:
>
>>Take a look at this position.  Arose from a game a friend played against Chess
>>Genius 5.0 on his AMD K6/200 (only 4MB hash):
>>
>>[D]k7/1b6/8/8/2Q5/8/6p1/6K1 w - -
>>
>>
>>Genius was set at 5 seconds per move and could not find the win (marching his
>>King towards the enemy....). Please try your programs at faster time controls
>>and let me know how they do.
>>
>>How exasperatingly dumb programs can be at times!  BTW, I had to time to test
>>only Shredder 3 and it found the winning sequence easily.
>>
>>
>>***  Djordje
>
>Not having tried this position on my own baby consider this: why add
>extra chess knowledge if these kind of things can so easily seen by
>search. No need to do things twice as the extra knowledge is only
>lowering the NPS of a program. I am not saying this is true for this
>position only that programmers often let do search the work instead
>of adding extra chess knowledge that is not needed anymore now that
>PC's are are so fast and becoming faster and faster and faster.....
>
>As you see in some cases you can even make your program stronger by
>removing chess knowledge. These cases are exceptional but they do
>exist.
>
>Ed

Ed, your baby does VERY well on this position (Rebel 10).  Actually it is even
slightly faster than Shredder 3 :) However, I don't think that I agree with you
regarding knowledge in some typical situations (one of which I just presented).
In this particular situation some of the fast searchers (Fritz, Deep Junior on
my dual board, even Hiarcs 7.1, Crafty SMP, etc. NOTA BENE: no tablebases this
time!) are having trouble finding the win.  Instead of watching the g1 promoting
square with their Queen and marching the King into mating Black, these fast
finders check Black ad nauseam.  Irritating.

***  Djordje





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