Author: Mike Byrne
Date: 18:08:08 12/26/03
Go up one level in this thread
On December 26, 2003 at 19:22:45, Bob Durrett wrote:
>On December 26, 2003 at 16:17:38, Mike Byrne wrote:
>
>>On December 26, 2003 at 15:34:43, Darren Rushton wrote:
>>
>>>>Actually what happens, is the 366 is SLOW. And I mean SLOW.
>>>
>>>I don't intend to be controversial here, but the conclusion I draw from your
>>>results is that Shredder 7 is such a brilliant program it is almost a match for
>>>the one of the better amateur programs on hardware that's almost 10 times
>>>slower.
>>>
>>>Regards,
>>>
>>>Darren
>>
>>It's not controversial and it's not new. In fact, these results could have been
>>predicted. Anytime you have a rating difference of around 200 points (SSDF
>>Shredder 2812, Crafty 2615) running on the same hardware, you would expect fair
>>match would be on a somewhere where the weaker engine need a 8x to 10x speedup.
>> It is often believed that a doubling of speed increase strength of around 50
>>elo points (some feel more, others less) especially in computer vs computer
>>play. 200 point rating differential would indicate:
>>
>>2^3=8
>>50x2x2=200 points
>>
>>therefore one would assume that it would require ~approx 8x machine would for
>>the weaker engine to catch up...
>>
>>SSDF
>> Rating + - Games Won Av.opp
>>1 Shredder 7.04 UCI 256MB Athlon 1200 MHz 2812 28 -26 781 75% 2623
>>30 Crafty 18.12/CB 256MB Athlon 1200 MHz 2615 27 -27 647 52% 2604
>>
>>In my view, Shredder 7.0.4 is the stongest engine available and I have seen
>>nothing to indicate that it should change.
>
>As far as I can tell so far, Shredder seems to give better results. Now if the
>author of shredder will just fix the bugs and fix it so that the PV is "high
>quality," Shredder will be the "best" chess-playing program.
>
>Bob D.
>
Shredder is the best "playing" program (imo), the pv feature does not
-------
impact its play -- I suspect the PV in any computer program is always suspect,
for serious analaysis - move it one move at a time - then analyze for 3 minutes
(or whatever) andthen move on ...just to look at any pv from most programs will
get you in trouble...
I will say that the Shredder PV is more suspect than most, and perhaps for
someone like yourself, it is not the best overall program.
----
>>
>>Shredder would fair just as well or better against most other amatuer engines as
>>well under the same conditions.
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