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Khmelnitsky test: Mephisto III-S Glasgow
Hi chess friends,
Obviously the Glasgow program is a dear one for many, and is especially put under spotlights (with some question marks!) since the Mephisto Phoenix availability. A new field has been opened for experiments, thanks to the huge acceleration the Mephisto Phoenix can provide. I own no chess computer running the Glasgow program, but I can run Franz's awesome CB-Emu suite, to get an accurate emulation (yes, it deserves being named a suite rather than a program). Several brilliant assets of CB-Emu facilitate testing activities: the ability to speed-up the run (within the performance limits of your host PC), the MessChess plugin layer, and the recently added ability to setup positions and play additional moves using referee mode (where available at the chess computer side, of course). And the Mephisto IIIS Glasgow is available, with three versions: 7.2Mhz to reproduce an original 68000 CPU throttled with wait states, 12Mhz for the fast 68000 without wait states, and 130Mhz to provide a flavor of the Phoenix Revelation II performance. My 10 years old laptop cannot sustain the 130Mhz version, but can run both original versions with 500% speed. The Info-2 mode of the chess computer displays the thinking time used, so I can set level-9 (analysis) and stop the thinking process on time. Then I can display the score using Info-1. OK, all the required tools are available to enable running the Khmelnitsky test! Next step has been to select versions, and associated speed. Of course, both original devices must enter the test, of course the new Mephisto Phoenix as well. I wanted also an intermediate version, significantly faster than the original, but not too much as this would widely extend the time required to run the test. I chose the Phoenix Revelation version (38Mhz equivalent). For speed scaling, I leveraged the data provided by Egbert: Zitieren:
I so let the emulator think 3mn per position / 1mn per move for both original IIIS Glasgow devices (7.2 and 12Mhz). The elapsed time to reach it is thus 36s / 12s thanks to the 5 times speed-up. For the ~38Mz Revelation version, the allowed thinking time raises to 9mn30s per position / 3mn10s per move using the 12Mhz original emulation. That's already a lot of time, but the 500% speed reduces the elapsed to 1mn54s / 38s. Last but not least, the Mephisto Phoenix (480Mhz equivalent) requires 2h thinking time per position (to mitigate the 12Mhz actual run) and 40mn per move. Despite the emulator speed-up, that is 24mn elapsed per position, and 8mn per move. At this stage you should be aware of: 1) Ruud has been very successful in speeding up the program, hats off! 2) the KT is going to require a bit of time and efforts, to complete. I kicked-off the the test a week ago, and I just reached 40%. So, for completeness + data graphs to be produced with a minimal analysis, expect a couple of weeks delay. So yes, that is a teaser!:D mit freundlichen Grußen, Eric |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Thank you Eric for this beautiful report. I am very curious to see how your tuned Mephisto Glasgow will perform in the Khmelnitsky test. I suspect it will be very different in the individual areas. I expect the biggest drops in the endgame and in tactics.
Greetings Egbert |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Zitat: Last but not least benötigt der Mephisto Phoenix (480-MHz-Äquivalent) 2 Stunden Bedenkzeit pro Position (um den tatsächlichen 12-MHz-Lauf abzuschwächen) und 40 Minuten pro Zug. Trotz der Emulator-Beschleunigung sind 24 Minuten pro Position und 8 Minuten pro Zug vergangen.
Ähm, irgendwie verstehe ich nur Bahnhof, wieso ist der Phoenix langsamer??:raffnix: |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Zitieren:
Schönen Gruß, Eric |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
65% completed...
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AW: Khmelnitsky test: Mephisto IIIS Glasgow
Zitieren:
Das ist so einfach wie die Einstein'sche Relativitätstheorie. Dort ist die Lichtgeschwindigkeit die unter allen Umständen unveränderliche Größe. Folglich müssen Massen und Längen sich ändern. Daher hört man in diesem Zusammenhang von extrem schweren Raumschiffen und zusammengestauchten Erdbällen. So schließt sich der Kreis und Physik ist wie Phoenix. Hahaha. Gruß! |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Zitieren:
Mame auf PC erreicht nicht die Performance der Emulation auf dem Phoenix, da auf dem PC Dinge mitemuliert werden, die man nicht braucht. Der Phoenix kommt auf die 66-fache Geschwindigkeit. Mit Laptop aus dem Jahr 2019 kommt bei mir auf etwas über 15-fache Geschwindigkeit. An Board ist ein Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz. Code:
mess64 glasgow -speed 200 Ohne Videoausgabe komme ich in die Nähe der 40-fachen Beschleunigung: Code:
mess64 glasgow -speed 200 -video none Speed 200 sagt übrigens, dass ich die 200-fache Geschwindigkeit haben wollte. Code:
-speed value |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Hallo Markus,
vielen Dank für diesen informativen Beitrag! :) Gruß Egbert |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
85% completed, next post will provide results :sabber:
MfG |
AW: Khmelnitsky test: Mephisto IIIS Glasgow
Zitieren:
I'm curious. :) Best regards Egbert |
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