7-piece endgame database

[Louis Morin]

Everybody knows about the Nalimov 6-piece endgame database, but does anyone know anything about the Lomonosov 7-piece endgame database? What I read on this is not really conclusive. Is it real or hoax, and is it available anywhere?

[Egidijus Zeromskis]

Re: 7-piece endgame database

Everybody knows about the Nalimov 6-piece endgame database, but does anyone know anything about the Lomonosov 7-piece endgame database? What I read on this is not really conclusive. Is it real or hoax, and is it available anywhere?

Half year old news: http://www.chesstalk.info/forum/show...ll=1#post66033
or direct link http://chessok.com/?page_id=27966
with the main important text
The total volume of all tablebases is 140 000 gigabytes, which is obviously too much for personal computers. Lomonosov Tablebases will be accessible online from the Aquarium 2012 interface. All users of ChessOK Aquarium 2012, Houdini 3 Aquarium and Houdini 3 PRO Aquarium will get free access to the service from March 20 to December 31, 2013.

[Louis Morin]

Re : Re: 7-piece endgame database

Actually, I am interested in using Lomonosov tablebases on the web. Is there a way to do that without buying something I don't need at all (Chess Assistant)?

[Christopher Mallon]

Re: 7-piece endgame database

Too much for now perhaps but 2 TB drives are extremely common now, 140 TB is not a huge leap upwards... We hit 2 GB hard drives in 1992 and broke the 137 GB "barrier" in 2002.

Half year old news: http://www.chesstalk.info/forum/show...ll=1#post66033
or direct link http://chessok.com/?page_id=27966
with the main important text
The total volume of all tablebases is 140 000 gigabytes, which is obviously too much for personal computers. Lomonosov Tablebases will be accessible online from the Aquarium 2012 interface. All users of ChessOK Aquarium 2012, Houdini 3 Aquarium and Houdini 3 PRO Aquarium will get free access to the service from March 20 to December 31, 2013.

[Egidijus Zeromskis]

Re: 7-piece endgame database

Too much for now perhaps but 2 TB drives are extremely common now, 140 TB is not a huge leap upwards... We hit 2 GB hard drives in 1992 and broke the 137 GB "barrier" in 2002.

Yeah, then the computer should be adopted to handle those bases. You might read the blog by one of the authors of 7-man TB at https://plus.google.com/100454521496393505718/posts (a lot of interesting things) I can not finda message to cite for the actual system used to handle request but the RAM and core sizes were big. Not a typical home desktop :)

I am interested in using Lomonosov tablebases on the web.

You pay or you wait :)
"For now, there is a web-service for accessing the tables. Currently it is used by Aquarium only (...), but later it will be added to other products and hopefully published. We are not sure that the web-service protocol will not change in the nearest days, so it's too early for the API specification."

[Alan Baljeu]

Re: 7-piece endgame database

Every time a piece is added to the database, the number of positions goes up by approximately 64x10 times (QRBNPqrbnp) -- actually less. For each position, all possible moves must be considered, say on average 2x the number of pieces, and all positions linked one to another and the best result tabulated. This means the indexing key size must also increase. And the storage structure also takes additional space. But then there's advanced compression techniques.

In the end, if adding 1 piece multiplies the storage requirement by 512, and if storage density doubles every two years while storage volume also doubles every year, then every 6 years we will be able to add another piece to the table, and in 150 years we will have a 32 piece tablebase.

However the storage will exceed the the visible universe, and besides computing speed will be bottlenecked long before that. It's currently believed our exponential growth will falter in 10 years due to physics, so we'll be stuck at 9 piece tablebases.