What is "Not Deterministic" about Rybka

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Topic Rybka Support & Discussion / Rybka Discussion / What is "Not Deterministic" about Rybka

By dragon49 (****)

Date 2008-06-20 20:06

I remember looking at some old threads and reading a reply by Vas, stating that Rybka was "Not Deterministic."

What does that mean?

Thanks

By Vempele (Silver)

Date 2008-06-20 20:50

For the multiprocessor version it means you get different results even if all the conditions are exactly the same.
For the single-processor one - well, I recently explained it here.

By Vasik Rajlich (Silver)

Date 2008-06-22 07:57

Yes, this is right.

The non-determinism from multi-processing is much stronger, this is typically what I am referring to. Single-processor machines are on their way out - I'm not even sure if you can buy a new single-processor CPU today.

Vas

By Uly

Date 2008-06-22 09:24

> I'm not even sure if you can buy a new single-processor CPU today.

In Mexico you can, we always have the oldest things in technology :)

...

:(

By Kapaun

Date 2008-06-22 09:38

In Germany you can, too. Don't worry... ;-)

By onursurme (***)

Date 2008-06-24 15:32 Edited 2008-06-24 15:37

Wow, at last , after 1 and a half year, I got the half of the answer ! (Half, because this doesn't change things about single processor Rybka)
Now I just wonder how I missed this fact of Rybka that she is not deterministic. Maybe I must spend more time with her :)
This forum works, but sometimes late :)

http://rybkaforum.net/cgi-bin/rybkaforum/topic_show.pl?pid=364;hl=

Topic Rybka Support & Discussion / Rybka Discussion / What is "Not Deterministic" about Rybka