Is anyone aware of why a tablebase of all 32 pieces hasn´t been done
yet ?

[]´s

Rafael

Rafael Anschau wrote:
Is anyone aware of why a tablebase of all 32 pieces hasn´t been done
yet ?

We're waiting for people like you to donate CPU cycles.

Joost
--
Take my love, take my land
Take me where I cannot stand [Firefly]
I don't care, I'm still free
You can't take the sky from me

Joost de Heer wrote:
Rafael Anschau wrote:
Is anyone aware of why a tablebase of all 32 pieces hasn´t been done
yet ?

We're waiting for people like you to donate CPU cycles.

And disc space.

General estimates are that it would take more time than the current
age of the universe and more disc space than can fit in the universe
to compute and store the 32-man tablebases.


Dave.

--
David Richerby Beefy Gnome (TM): it's like a smiling
www.chiark.greenend.org.uk/~davidr/ garden ornament that's made from
a cow!

Rafael Anschau wrote:
Is anyone aware of why a tablebase of all 32 pieces hasn´t been done
yet ?

[]´s

Rafael

Because even if you can do electron based storage, there are not enough
electrons in the universe to store the entire database.

On 20 Mar 2006 09:23:21 -0800, "Rafael Anschau"
wrote:

Is anyone aware of why a tablebase of all 32 pieces hasn´t been done
yet ?

We can't even store all seven-piece tablebases yet. It is estimated
that ALL seven-piece tablebases will require more storage capacity
than will be available in the foreseeable future.

Rafael Anschau wrote:
But it seems like the notion that chess would end due to algorithms
finding it's ultimate truth will remain on the world of science
fiction for sometime.

Possibly forever, unless we figure out a way of working out who wins
without brute-force search. Of course, working out the tablebases
requires brute-force, by construction.


Dave.

--
David Richerby Technicolor Mentholated Dictator (TM):
www.chiark.greenend.org.uk/~davidr/ it's like a totalitarian leader but
it's invigorating and in realistic
colour!

Johnny T wrote:
Because even if you can do electron based storage, there are not enough
electrons in the universe to store the entire database.

Urban legend. A molecular storage the size of earth will do it.

Upper limit of the number of chess positions to sto 2.28 * 10e46
http://www.chessbox.de/Compu/schachzahl1b_e.html

Lower limit of the number of molecules of earth:
Earth consists mainly of iron, oxygen, silicon, magnesium. The molecular
weight of molecules out of oxygen, silicon and magnesium is in the
ballpark or lower than the atomic weight of iron. So, for the sake of
simplicity, we can put a limit on the number of earth's molecules if we
assume the earth consists entirely of iron.

Earth mass: 5.972e27 g
One mole of iron contains 6.0221415 * 10e23 atoms (Avogadro's number)
One mole of iron has the mass of 55.845 grams. So the earth consists of
5.972e27 g * 6.022 * 10e23 atoms / 55.845 g = 6.44 * 10e49 atoms (or
molecules).

So for every position of chess to store, there are at least 3000
molecules of earth to store it which should be sufficient.
A supercomputer the size of earth indeed would have the capacity to
solve the game of chess, amongst other things.

Claus-Juergen

Claus-Jürgen Heigl wrote:
Johnny T wrote:
Because even if you can do electron based storage, there are not
enough electrons in the universe to store the entire database.

Urban legend. A molecular storage the size of earth will do it.

So for every position of chess to store, there are at least 3000
molecules of earth to store it which should be sufficient.
A supercomputer the size of earth indeed would have the capacity to
solve the game of chess, amongst other things.

Heh, I stand humbly corrected.

Cheers

Claus-Jürgen Heigl wrote:
Johnny T wrote:
Because even if you can do electron based storage, there are not enough
electrons in the universe to store the entire database.

Urban legend. A molecular storage the size of earth will do it.

Upper limit of the number of chess positions to sto 2.28 * 10e46
http://www.chessbox.de/Compu/schachzahl1b_e.html

Lower limit of the number of molecules of earth:
Earth consists mainly of iron, oxygen, silicon, magnesium. The molecular
weight of molecules out of oxygen, silicon and magnesium is in the
ballpark or lower than the atomic weight of iron. So, for the sake of
simplicity, we can put a limit on the number of earth's molecules if we
assume the earth consists entirely of iron.

Earth mass: 5.972e27 g
One mole of iron contains 6.0221415 * 10e23 atoms (Avogadro's number)
One mole of iron has the mass of 55.845 grams. So the earth consists of
5.972e27 g * 6.022 * 10e23 atoms / 55.845 g = 6.44 * 10e49 atoms (or
molecules).

So for every position of chess to store, there are at least 3000
molecules of earth to store it which should be sufficient.
A supercomputer the size of earth indeed would have the capacity to
solve the game of chess, amongst other things.

Claus-Juergen

Amongst other things like poker?

LiamToo wrote:

Amongst other things like poker?

I think he means far more important problems, like what do you get when
you multiply six by nine.