I downloaded some six pieces Nalimov's tablebases from Hyatt's FTP
site. I know I have to remove the middle dot to use them in Fritz 8.
But what about files with a number in their names, like

kqbnkq.0.nbb.emd File EMD 810.430 KB 05/06/2003 0.00.00
kqbnkq.0.nbw.emd File EMD 685.176 KB 05/06/2003 0.00.00
kqbnkq.1.nbb.emd File EMD 824.312 KB 05/06/2003 0.00.00
kqbnkq.1.nbw.emd File EMD 656.936 KB 05/06/2003 0.00.00
kqbnkq.2.nbb.emd File EMD 499.917 KB 05/06/2003 0.00.00
kqbnkq.2.nbw.emd

How can I handle them?

Moreover, do I need to download both nbb AND nbw to work with Fritz 8?

Thanks.

(Pistarino) wrote in message . com...
I downloaded some six pieces Nalimov's tablebases from Hyatt's FTP
site. I know I have to remove the middle dot to use them in Fritz 8.
But what about files with a number in their names, like

kqbnkq.0.nbb.emd File EMD 810.430 KB 05/06/2003 0.00.00
kqbnkq.0.nbw.emd File EMD 685.176 KB 05/06/2003 0.00.00
kqbnkq.1.nbb.emd File EMD 824.312 KB 05/06/2003 0.00.00
kqbnkq.1.nbw.emd File EMD 656.936 KB 05/06/2003 0.00.00
kqbnkq.2.nbb.emd File EMD 499.917 KB 05/06/2003 0.00.00
kqbnkq.2.nbw.emd

How can I handle them?

You need all of them. Files larger than 2 Gb are splitted because of a
32bit machine cannot address files so big.
BUT I don't know if Fritz 8 can handle this splitted files. I am
downloading them to make a test.


Moreover, do I need to download both nbb AND nbw to work with Fritz 8?

Yes, nbb are TB where Black has to move, in nbw the next move is
White.


Thanks.

Thanks

On 13 Jul 2004 00:50:03 GMT, CeeBee
wrote:

(Pistarino) wrote in rec.games.chess.computer:

I downloaded some six pieces Nalimov's tablebases from Hyatt's FTP
site. I know I have to remove the middle dot to use them in Fritz 8.
But what about files with a number in their names, like

kqbnkq.0.nbb.emd File EMD 810.430 KB 05/06/2003 0.00.00
kqbnkq.0.nbw.emd File EMD 685.176 KB 05/06/2003 0.00.00
kqbnkq.1.nbb.emd File EMD 824.312 KB 05/06/2003 0.00.00
kqbnkq.1.nbw.emd File EMD 656.936 KB 05/06/2003 0.00.00
kqbnkq.2.nbb.emd File EMD 499.917 KB 05/06/2003 0.00.00
kqbnkq.2.nbw.emd

How can I handle them?

Moreover, do I need to download both nbb AND nbw to work with Fritz 8?


You don't need to remove dots for use with the Fritz interface (or the
latets to be able to read 6 man TB's for that matter). The numbers
indicate large files split in parts. IIRC this is done because some OS's
can't read files larger than a certain size.

If you download tablebase files you need to consider dependencies. If
you download one tb and leave out a tb which could be the result of the
other you won't get proper results.

I have all 3-4-5 man tablebases. How can I check which tablebases are
needed for a specific 6 man tbs (knppkr for example). Moreover, do you
know how use splitted files in Deep Fritz 8? (I posted another message
with this question, don't kill me, please!

Pistarino wrote:
I have all 3-4-5 man tablebases. How can I check which tablebases are
needed for a specific 6 man tbs (knppkr for example).

You're playing a game with knpp vs kr. What combinations could arise?
Any of the pieces could be captured and either of the pawns could promote.
So, you need any filename formed by deleting one of the characters that
isn't a k and any filename formed by changing one of the p's into a q, r,
n or b.


Dave.

--
David Richerby Pickled Happy Puzzle (TM): it's like
www.chiark.greenend.org.uk/~davidr/ an intriguing conundrum that makes
your troubles melt away but it's
preserved in vinegar!

Pistarino wrote:
I have all 3-4-5 man tablebases. How can I check which tablebases are
needed for a specific 6 man tbs (knppkr for example).

You're playing a game with knpp vs kr. What combinations could arise?
Any of the pieces could be captured and either of the pawns could promote.
So, you need any filename formed by deleting one of the characters that
isn't a k and any filename formed by changing one of the p's into a q, r,
n or b.


Dave.

A succinct description. Which translates into ~30 tablebases (~15 pairs
for B,W) to cover 6pc tablebases for only knppkr. (You already have all
the necessary 3,4,5 man tablebases this translates to by piece capture).
You need every one of the knppkr transposition tablebases or it will not
function at all. You may want to go to Hyatt's site and add up the file
sizes of these ~30 tablebases so you can plan where to put them. It's a
large number of gigabytes for just this one set. The complete set of 6pc
tablebases is over 1000 gigabytes.

The combined size of all 3,4,5 man table bases is only about 7 gigabytes,
by way of comparison.

SethB wrote:
Pistarino wrote:
I have all 3-4-5 man tablebases. How can I check which tablebases are
needed for a specific 6 man tbs (knppkr for example).

You're playing a game with knpp vs kr. What combinations could arise?
Any of the pieces could be captured and either of the pawns could promote.
So, you need any filename formed by deleting one of the characters that
isn't a k and any filename formed by changing one of the p's into a q, r,
n or b.


Dave.

A succinct description. Which translates into ~30 tablebases (~15 pairs
for B,W) to cover 6pc tablebases for only knppkr. (You already have all
the necessary 3,4,5 man tablebases this translates to by piece capture).
You need every one of the knppkr transposition tablebases or it will not
function at all. You may want to go to Hyatt's site and add up the file
sizes of these ~30 tablebases so you can plan where to put them. It's a
large number of gigabytes for just this one set. The complete set of 6pc
tablebases is over 1000 gigabytes.

The combined size of all 3,4,5 man table bases is only about 7 gigabytes,
by way of comparison.


I will add that for Crafty (I can't speak for other programs) you can get
by without having the promotion tables. IE KRPPKR will work just fine
without the other 10 promotion cases. Having them is better, as you can
reach KQRPKR via normal captures as well as by a pawn promotion, so you will
have more info to use in the search. But crafty will play just fine without
the promotion tables, and it won't get hung up as some programs do and avoid
promoting since it can't see the forced mate. It has special code to avoid
this particularly ugly problem.


--
Robert M. Hyatt, Ph.D. Computer and Information Sciences
University of Alabama at Birmingham
(205) 934-2213 136A Campbell Hall
(205) 934-5473 FAX Birmingham, AL 35294-1170

* Robert Hyatt (2004-07-28) schrieb:

But crafty will play just fine without the promotion tables, and it
won't get hung up as some programs do and avoid promoting since it
can't see the forced mate. It has special code to avoid this
particularly ugly problem.

Is this special to promotion, or does is work for other missing tables
as well?

Does it just start searching again?

mfg, simon .... l

Simon Krahnke wrote:
* Robert Hyatt (2004-07-28) schrieb:

But crafty will play just fine without the promotion tables, and it
won't get hung up as some programs do and avoid promoting since it
can't see the forced mate. It has special code to avoid this
particularly ugly problem.

Is this special to promotion, or does is work for other missing tables
as well?

Does it just start searching again?

mfg, simon .... l

If you have a missing table, the basic idea is to take all the moves at the
root (assuming the table for the root position is available and that it says
this game is won) and for each root move you must either get (after making
the move) win in N-1, draw, or lost for the score, except for those with
no tables. If there are no win in N-1 moves there, then you must promote
or capture to continue the win.

Ie the most common ugly case is a pawn on the 7th, but you don't have the
promotion table. The program would rather keep the pawn which leads to a
mate even though it is no closer than the last move's mate score, rather
that to promote the thing to a queen and get no mate score at all. Crafty
will promote just fine in that case...


--
Robert M. Hyatt, Ph.D. Computer and Information Sciences
University of Alabama at Birmingham
(205) 934-2213 136A Campbell Hall
(205) 934-5473 FAX Birmingham, AL 35294-1170