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So: pgn-extract -TpLeko --output Leko.pgn games.pgn but there is not currently (2018.12.19) a way to have the file names generated automatically from the contents of the source file. …

As an author of some PGN-processing software, I would also be interested in having access to a general test suite but I am not aware of any, unfortunately, and all I can offer is some advice based on experience …

You can do it with pgn-extract via a combination of the -R flag, to select the tags you want to retain (and their ordering), and the --xroster option to omit all those tags not listed in the roster file … For instance, if you want only White, Black and Result tags included with each game, place White, Black and Result (one per line) in a file called roster, say and then run pgn-extract as follows: pgn-extract …

For the specific requirement to filter out Chess960 games from a PGN file, you could use pgn-extract.pgn-extract home page Since such games necessarily include a SetUp tag, the --nosetup argument of pgn-extract … Disclosure: I am the author of pgn-extract. …

. *" | pgn-extract -F --quiet) kentdjb (author of pgn-extract) …

I am the author of pgn-extract. It would be easier to address the specifics of what you are trying to do via the personal email address included with the pgn-extract documentation. …

As of 2017.04.01, pgn-extract (version 17-38) does provide variation splitting functionality via its --splitvariants flag. So, if you want this in a Windows/Linux/Mac OS environment it is available. … Disclosure: I am the author of pgn-extract. …

This is a bug due to sloppy copy-and-paste of code on my part and failure to test games involving promotions. If you wish to apply the fix yourself to the source of v21-08 (and earlier) then in the fi …

The basic usage of --splitvariants is: pgn-extract --splitvariants inputfile.pgn --output outputfile.pgn Given the files you have named, you should use: pgn-extract --splitvariants 2.pgn --output 3.pgn …

This is not a direct answer, but if you simply want a file of ECO data in PGN format then there is one freely available with pgn-extract on this page: https://www.cs.kent.ac.uk/people/staff/djb/pgn-extract …

One option would be to run pgn-extract with the -E3 option as that will separate games into individual files whose name would be D85.pgn, D86.pgn, etc. … \pgn-extract.exe -e -E3 game2.pgn An alternative would be to create a separate file for each opening position you wish to match and then use pgn-extract with the -x flag. …

If you are not tied to using PythonChess and simply want FEN encodings of each position, you might like to consider using my free, open-source pgn-extract program with its -Wepd option to output in EPD … For instance: pgn-extract --quiet -Wepd games.pgn Here are the first few lines of its output for one of the games quoted in the OP: rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - c0 sandstorm00- …

You can pipe the output of the decompression program as input to pgn-extract and give pgn-extract a file of the tags you are interesting in matching. … It will then output matched games, in PGN format, to a file of your choosing. …