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Re: 7-men Syzygy attempt

Posted: Mon Aug 20, 2018 9:39 pm
by Dann Corbit
Sesse wrote:
Mon Aug 20, 2018 9:17 pm
Dann Corbit wrote:
Mon Aug 20, 2018 8:10 pm
Instead of 8 man files, I think the next logical project is the 7 man DTM with Ronald's new format.
Or 6-man DTM50, for that matter.

Actually, the next logical project is getting the probing code into Stockfish and Fathom.
Cfish can already do it, so it should not be a very big step to incorporate in other programs, since there is a working example.

Edit:
I guess they are already incorporated into Stockfish.
Here is the UCI setting for probes in the current code:
option name SyzygyProbeLimit type spin default 7 min 0 max 7

Re: 7-men Syzygy attempt

Posted: Mon Aug 20, 2018 10:19 pm
by Sesse
Ah, I see the official Stockfish has been patched now.

I guess the code is independent from my patch, since it doesn't take in the Robin Hood hashing nor overflow trick, and thus needs a four times as big hash table :-)

Re: 7-men Syzygy attempt

Posted: Mon Aug 20, 2018 10:21 pm
by Dann Corbit
Sesse wrote:
Mon Aug 20, 2018 10:19 pm
Ah, I see the official Stockfish has been patched now.

I guess the code is independent from my patch, since it doesn't take in the Robin Hood hashing nor overflow trick, and thus needs a four times as big hash table :-)
You might submit your patch to the SF group effort.
It sounds like it would be very helpful.

Is it included in the Cfish version?

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 4:31 am
by Michel
duncan wrote:
Mon Aug 20, 2018 8:58 pm
Contrary to previous versions of the bases which took on the names of their creators, de Man chose to call them Syzygy (pronounced Sih-Zih-Gee), which means a pair of connected or corresponding things.
Recall that RdM is a mathematician. A syzygy is in fact a specific (somewhat advanced) mathematical concept:

https://en.wikipedia.org/wiki/Hilbert%2 ... relations)

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 6:55 am
by whereagles
Dann Corbit wrote:
Mon Aug 20, 2018 5:41 pm
I hope that this effort will become very famous. It is really something incredible.
dunno about fame, but syzygy site will sure ramp up its visits :D

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 6:56 am
by whereagles
Michel wrote:
Tue Aug 21, 2018 4:31 am
Recall that RdM is a mathematician. A syzygy is in fact a specific (somewhat advanced) mathematical concept:
think he's retired.. but might still want to write a paper on the subject :wink:

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 8:45 am
by Sesse
Dann Corbit wrote:
Mon Aug 20, 2018 10:21 pm
You might submit your patch to the SF group effort.
It sounds like it would be very helpful.
I don't actually know how. I guess maybe I could send a pull request on GitHub?
Dann Corbit wrote:
Mon Aug 20, 2018 10:21 pm
Is it included in the Cfish version?
Not that I know of.

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 8:46 am
by Sesse
So there we are… 60 TB disk ordered. (36 usable TB after RAID-6 and accounting for that 10^12 bytes is less than 2^40 bytes.)

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 10:05 am
by Jesse Gersenson
Sesse wrote:
Tue Aug 21, 2018 8:46 am
So there we are… 60 TB disk ordered. (36 usable TB after RAID-6 and accounting for that 10^12 bytes is less than 2^40 bytes.)
What's the model number, I may get a set.

Re: 7-men Syzygy attempt

Posted: Tue Aug 21, 2018 10:26 am
by Sesse
Seagate Enterprise Exos X10, 10 TB. Six of them.