lstlaure wrote:Dostojewsky wrote:Sorry to tell you the naked truth but Philidor is not such an sophisticated piece of chesssoftware as the Mark V was.
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So it is time for me to say goodbye to Philidor. Sorry for the brutal truth.
Here is the whole game. Philidors shows that he is no opponent for Zarkov 3
You are absolutely right! Even Mr. Broughton would agree with you. Philidor was a lot weaker than the Mark V. But comparing Philidor to Zarkov 3 is a bit unfair. Philidor for DOS was written in 1984 with design constraints (memory limit, for example) that Zarkov 3 didn't have, as it came out 10 years later. 10 years in the computer world is an eternity!
Even if Philidor is weaker than plenty of other programs that came out shortly after, it is still an important part of the history of computer chess programming. David Broughton was a pioneer, and must not be forgotten.
We can try out if Philidor is stronger or weaker then mkv / mkVI.
IMO the algorithms have changed between the dedicated chess computers and the pc engine, as I have shown you by giving you the source about the new algorithm „interest search“ on the AI factory website.
http://aifactory.co.uk/newsletter/2014_ ... inimax.htm
The programmer I spoke with told me that with these changes the software made a jump of at least 100 ELO without beeing more brute force.
Philidor is still a selective engine but plays stronger.
As far as I see it the algorithms used in the dedicated chess computers were published in ICCA journal and websites under the name: SEX algorithm.
https://www.chessprogramming.org/SEX_Algorithm
So the difference between dedicated units and pc engine is the difference between „sex algorithm“ and „interest search“.
It is often said that MkVI is weaker then mkV.
I also want to disagree here too.
Philidor MK VI dedicated chess computer plays different then its predecessor.
But not weaker overall.
I made a dedicated chess computer tournament with 40/120 time control that had the following results after 13 rounds:
Code: Select all
Motor Punkte ScChScMeScFiScElMeMiYeMeMeNo S-B
01: SciSys Superstar 28K {Brettcomputer} 10,5/13 · = 1 0 1 1 1 1 0 1 1 1 1 1 61,25
02: Chafitz Destini Prodigy {Brettcomputer} 10,5/13 = · 0 = 1 1 = 1 1 1 1 1 1 1 58,25
03: Scisys MKVI Philidor {Brettcomputer} 9,0/13 0 1 · 1 0 1 0 = 1 1 = 1 1 1 50,50
04: Mephisto III ESB 6000 {Brettcomputer} 8,5/13 1 = 0 · 1 0 0 1 1 1 1 1 0 1 50,75
05: SciSys Chess Companion III {Brettcomputer} 8,0/13 0 0 1 0 · = = 1 1 = 1 1 = 1 42,25
06: Fidelity Chess Challenger Sensory Champion {Brettcomputer} 8,0/13 0 0 0 1 = · 0 1 1 = 1 1 1 1 39,00
07: Scisys MKV {Brettcomputer} 7,5/13 0 = 1 1 = 1 · 0 1 = 0 0 1 1 46,75
08: Elektronika IM05 {Brettcomputer} 6,5/13 0 0 = 0 0 0 1 · 0 1 1 1 1 1 29,00
09: Mephisto ESB II {Brettcomputer} 5,5/13 1 0 0 0 0 0 0 1 · 0 1 1 1 = 28,00
10: Milton Bradley {Brettcomputer} 5,0/13 0 0 0 0 = = = 0 1 · 0 1 1 = 23,75
11: Yeno 301 XL {Brettcomputer} 4,5/13 0 0 = 0 0 0 1 0 0 1 · = = 1 21,75
12: Mephisto Junior (Tasten) {Brettcomputer} 3,5/13 0 0 0 0 0 0 1 0 0 0 = · 1 1 13,75
13: Mephisto Supermini {Brettcomputer} 2,0/13 0 0 0 1 = 0 0 0 0 0 = 0 · 0 14,75
14: Novag Opal II {Brettcomputer} 2,0/13 0 0 0 0 0 0 0 0 = = 0 0 1 · 7,25
91 Partien von 182 gespielt
SEE here for the games:
https://www.schachcomputer.info/forum/s ... or&page=14
We could try to let the dedicated units run vs. The pc engine by reducing the hardware of the pc to the 6502/2 MHz hardware level.
So we have 3 stages:
1. the dedicated chess computers,
2. Parker brothers engine
3. Later Cyrus 68000 engine developed by levy/Taylor.
Stage 3 was IMO without David Broughton.
He had a new job for the television company’s producing video effects for the commercial television channels.
But levy and Taylor continued on the motorola 68000 hardware that was state of the art at that time.
I am not sure if the software was ever sold in another way then CXG Sphinx dedicated chess computer,.
What seems like a fairy tale today may be reality tomorrow.
Here we have a fairy tale of the day after tomorrow....