Author: Christophe Theron
Date: 09:26:00 01/03/01
Go up one level in this thread
On January 03, 2001 at 07:48:12, Tord Romstad wrote:
>On January 02, 2001 at 21:08:29, Christophe Theron wrote:
>
>>On January 02, 2001 at 17:29:46, Tord Romstad wrote:
>>
>>>On January 02, 2001 at 09:06:20, Christophe Theron wrote:
>>>
>
>>>>I take Lang's programs as reference as they are known to be well optimized for
>>>>680x0 processors.
>>>>
>>>>The DragonBall processor is close to a 68000 (at the same clock frequency). So
>>>>the Mephisto Lyon @36MHz would be above, and the Mephisto Berlin is clearly
>>>>below.
>>>>
>>>>My best guess is the rating of the Berlin on 68000 @12MHz + the elo difference
>>>>you get by speeding up the processor to 33MHz (that makes
>>>>70*log(33/12)/log(2)=102 elo points).
>>>>
>>>>So it would be rated 2117 elo (SSDF). This does not account for software
>>>>improvements that have been done since the Berlin, maybe 50 to 100 additional
>>>>points? I don't know...
>>>
>>>I am afraid the truth is precisely the opposite --- the chess engine in
>>>Chess Genius for Palm is probably significantly weaker than the one in
>>>Mephisto Berlin. The engine in Chess Genius, I have read, is the engine
>>>of the very old Mephisto Roma (1987, I think), which was the last Lang
>>>program which did not use transposition tables. The engine in Mepisto
>>>Berlin is basically a port of Chess Genius 1 for the PC (released some time
>>>during the years 1991--1993).
>>>
>>>The best way to estimate the strength of Genius for Palm is proably to
>>>look up the rating of Mephisto Roma on the SSDF list and add some points
>>>for the faster hardware.
>>>
>>>Please note that this is all based 100% on what I have read from various
>>>sources, I have never seen Genius for Palm in action myself.
>>>
>>>Tord
>>
>>
>>
>>You are absolutely right in what you say, but I think you should keep in mind
>>that I was simply trying to answer the following question:
>>
>>"In theory , what could a program be rated (SSDF) on a device like
>> this , given the physical limitations ? (33MHz , and if the total
>> program isn't over 4-5 mg) ?"
>
>I apologise for the misunderstanding, I was reading too fast. However, I
>still think you are a little bit too optimistic. Mephisto Berlin did use
>transposition tables. If I understand correctly, transposition tables are
>difficult or impossible to implement in PalmOS.
>
>
>Tord
Hash tables slow the program down a little bit under PalmOS (about 5%), but
there is no problem to implement them.
Christophe
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