Tool

[Ponti]

I need a tool to delete all moves from a database, remaining only the initial positions of each "problem".

Database is in chessbase format, but obviously I can convert it to pgn first.

[Ferdy]

I need a tool to delete all moves from a database, remaining only the initial positions of each "problem".

Database is in chessbase format, but obviously I can convert it to pgn first.

Can you show in the pgn format an example, both the original and the final output format?

[hgm]

Seems to me such a tool is called a text editor. Just delete all lines from the PGN except the FEN tag, and then the [FEN " prefix and the "] suffix, and you have a file of FENs. Five commands in ed.

[stegemma]

Seems to me such a tool is called a text editor. Just delete all lines from the PGN except the FEN tag, and then the [FEN " prefix and the "] suffix, and you have a file of FENs. Five commands in ed.

Or less, in Windows command prompt:

Code: Select all

sort db.pgn>fen.txt

then edit the file and keep only the lines with [FEN...], that are all grouped together!

[Sven]

Seems to me such a tool is called a text editor. Just delete all lines from the PGN except the FEN tag, and then the [FEN " prefix and the "] suffix, and you have a file of FENs. Five commands in ed.

Or less, in Windows command prompt:

Code: Select all

sort db.pgn>fen.txt

then edit the file and keep only the lines with [FEN...], that are all grouped together!

@Aloisio:

At Windows command prompt:

Code: Select all

findstr "FEN " db.pgn | sort > fen.txt

and then edit "fen.txt" with a text editor, indeed ...

In UNIX-like shell (e.g. Cygwin bash):

Code: Select all

grep 'FEN ' db.pgn | sed 's/^.FEN "\(.*\)"$/\1/' | sort -u > fen.txt

[Ponti]

Ok, but... what if I have a file with 5.000 positions with the answers, I want to delete the answers and get only the diagrams.

To edit that manually... oh... 5.000 games ?

Is there another way to do it ?

[hgm]

That is not more work (for you) than editing a single game, right? Most editors have a 'Replace all' command. Even MS NotePad. All is all. Even when it are a million games. Just takes the computer a bit longer.

[Ponti]

Thanks and sorry to bother you.
I´m not a programmer.
With your help I managed to do it !

After extracting only the [FEN ...] and using notepad, I converted the epd file back again to another .pgn file. Now I have only the positios, without the answers.

It was a .cbh file, converted to .pgn, of all positions in a book (by Andrei Volokitin), commented in russian (well, I can´t read russian).

[hgm]

No bother, you are more than welcome. That is what forums are for!