Best tablebase algorithms for 6-men server?

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kinderchocolate
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Best tablebase algorithms for 6-men server?

Post by kinderchocolate » Sat Apr 15, 2017 1:15 pm

I want to setup a 6-men server for tablebase queries. This has nothing to do with chess engine, it's just be a server. I want to get WDL and distance-to-mate information for each position I query. What's the best tablebase scheme?

I believe https://syzygy-tables.info uses the Gaviota for DTM. Do we have any open-source 6-men DTM tablebase?

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yurikvelo
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Re: Best tablebase algorithms for 6-men server?

Post by yurikvelo » Sat Apr 15, 2017 2:43 pm

kinderchocolate wrote:I want to setup a 6-men server for tablebase queries. This has nothing to do with chess engine, it's just be a server. I want to get WDL and distance-to-mate information for each position I query. What's the best tablebase scheme?

Nalimov (~400 Gb partial set *.emd, 1151 Gb full set) has DTM, but lacks DTZ
Syzygy (~150 Gb *.rtb*) has DTZ, but lacks DTM

http://tablebase.sesse.net/
kinderchocolate wrote: I believe https://syzygy-tables.info uses the Gaviota for DTM. Do we have any open-source 6-men DTM tablebase?
Where you see DTM? I see only DTZ for 6-men.
DTM only shown after conversion to 5-men

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Nordlandia
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Re: Best tablebase algorithms for 6-men server?

Post by Nordlandia » Sat Apr 15, 2017 4:20 pm

I've started a thread on asmfish github page on possible gaviota egtb implementation, so evaluation show mate in x instead of large number such as 128.xx ->

More information can be found here ->

https://github.com/lantonov/asmFish/issues/44

kinderchocolate
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Re: Best tablebase algorithms for 6-men server?

Post by kinderchocolate » Wed Apr 19, 2017 3:35 pm

Sorry for the late response, it was Easter!

Does Nalimov tablebase requires a license for probing? Syzygy is out of question because I want DTM not DTZ.

What about Scorpio? Can we do 6-men DTM there? ~1000GB shouldn't be a problem for a server.
yurikvelo wrote:
kinderchocolate wrote:I want to setup a 6-men server for tablebase queries. This has nothing to do with chess engine, it's just be a server. I want to get WDL and distance-to-mate information for each position I query. What's the best tablebase scheme?

Nalimov (~400 Gb partial set *.emd, 1151 Gb full set) has DTM, but lacks DTZ
Syzygy (~150 Gb *.rtb*) has DTZ, but lacks DTM

http://tablebase.sesse.net/
kinderchocolate wrote: I believe https://syzygy-tables.info uses the Gaviota for DTM. Do we have any open-source 6-men DTM tablebase?
Where you see DTM? I see only DTZ for 6-men.
DTM only shown after conversion to 5-men

kinderchocolate
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Re: Best tablebase algorithms for 6-men server?

Post by kinderchocolate » Wed Apr 19, 2017 3:43 pm

I understand Gaviota allows only up to 5-men DTM, but I want 6-men. If I can't find a reliable tablebase technology, I may also run a chess engine like how you describe in the link.
Nordlandia wrote:I've started a thread on asmfish github page on possible gaviota egtb implementation, so evaluation show mate in x instead of large number such as 128.xx ->

More information can be found here ->

https://github.com/lantonov/asmFish/issues/44

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Nordlandia
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Re: Best tablebase algorithms for 6-men server?

Post by Nordlandia » Wed Apr 19, 2017 4:03 pm

Is your server intended for private usage only, or can it be accessed from around the world?

Nalimov EGTB ->

«The license policy requires explicit permission by Eugene Nalimov»

https://chessprogramming.wikispaces.com ... Tablebases

---

Gaviota is open source so it can be added to Asmfish.

https://chessprogramming.wikispaces.com ... Tablebases

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hgm
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Re: Best tablebase algorithms for 6-men server?

Post by hgm » Wed Apr 19, 2017 4:10 pm

kinderchocolate wrote:What about Scorpio?
Scorpio is WDL, not DTM.

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Re: Best tablebase algorithms for 6-men server?

Post by kinderchocolate » Wed Apr 19, 2017 4:18 pm

The server is for statistical research in chess. Do I need a license? Where to ask for a license?

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Nordlandia
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Re: Best tablebase algorithms for 6-men server?

Post by Nordlandia » Wed Apr 19, 2017 4:44 pm

You're not the first one trying to contact him.

http://www.open-aurec.com/wbforum/viewt ... =4&t=50222

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jshriver
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Re: Best tablebase algorithms for 6-men server?

Post by jshriver » Thu Apr 20, 2017 4:47 am

kinderchocolate wrote:If you're interested in downloading various EGTB data sets feel free to check out my site. Verified and been up for years.

http://oics.olympuschess.com/tracker

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