Pgn-extract
Merja Caryk
This is the home page forthe pgn-extract program,which is a command-line program for searching, manipulating and formattingchess games recorded in the Portable Game Notation (PGN) or something close. Itis capable of handling files containing millions of games. It also recognises Chess960encodings.A fulldescription of pgn-extract's functionality is available and includedwith the sources.Here you can find the C source code and Windows binaries for the currentversion.pgn-extract compiles and runs under Windows, Linux and Mac OS X.This program is made available under the terms of theGNUGeneral Public License (Version 3).Getting-started video for Windows usersFor Windows users who are really only interested in gettingthe binary working, there is a short introductory video.OverviewThe program is designed to make it easy to extract and format selected games from aPGN format data file based on a wide variety of criteria.The criteria include:
- textual move sequences;
Over the on-going 20+ year course of its development, it has also addedlots of features for controlling what is output (e.g., differentalgebraic formats, EPD, no move numbers, restricting game length, etc.)The program includes a semantic analyser which willreport errors in game scores and it is also able to detect duplicategames found in its input files.The range of input move formats accepted is fairly wide.The output is normally in English StandardAlgebraic Notation (SAN) but this can be varied to long-algebraic or UCI,for instance.Extracted games may be written out either including or excludingcomments, NAGs, variations, move numbers, tags and/or results.Games may be given ECO classificationsderived from the accompanying file eco.pgn, or a customised versionprovided by the user.The program is designed to be relatively memory-friendly, so itdoes not retain a game's moves in memory once it has been processed.This also makes it suitable for bulk processing very large collections of games- it can efficiently process files containing several millions of games.Use the --help argument to the program toget the full lists of arguments.New in recent versionsThese are the main changes in the most recent version:
- A bug fix for material matches with Chess960 games involving castling.
- A bug fix for -n when used with tag matching.
- A bug fix for tag matching with relational operators.
- A bug fix for position matching via -z. Games with FEN tags in which black was to move had colours swapped when matching.
- New options --commented, --insufficient and --suppressmatched.
- Added stdout as an output for -n.
- EloDiff pseudo-tag added.
- Relational operator available for non-numeric tag values.
In October 2018 I wrote blog postabout using pgn-extract to mine a PGN database. As an example it looks at the effect of having a bishop pair versus a knight pair.Answers on Chess StackExchange using pgn-extractI am active on Chess StackExchange askentdjband aim to respond to pgn-extract related questions, although email to me is my preferred way to raisepotential issues with the program.From time to time, I have provided answers to questions that involvethe use of pgn-extract for analysis tasks:
- Three-fold repetition.
- Quadrupled pawns.
- Frequency of occurrence of castling.
My home page at the University of Kent.
d.j.barnes @ kent.ac.uk
@kentdjb
Last updated: 14th July 2024: version 24-11 released.
pgn-extract,
an open source command-line PGN tool by David J. Barnes, written in C and licensed under the GPL v3.0, for searching, manipulating and formatting chess games recorded in the Portable Game Notation (PGN) or something close. pgn-extract is capable of handling files containing millions of games and also recognises Chess960 encodings [1].
Anyone familiar with the program pgn-extract to possibly help with a little troubleshooting? I have tried to look through manual of the program and I am coming at a loss with addressing the issue. I have tried using pgn-extract program commands -C, -N, -V with no affect. Here's the following line from my .bat file.
improper header spacing examples(text editor used is Brackets). This is causing a variance in multiple GUI's calculation of total games in the database. Preferred fix would be to use pgn-extractor to clean the pgn file by properly placing the header of the next game in the proper position below the previous game so the GUI can correctly count total games. I know how to manually fix this but I'm also building a separate opening book that will have a thousands of games in and in case this issue happens with that, would like to find a fix beforehand.
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. I would be happy to help.
I'm using the --splitvariants flag to generate cards for anki, my problem is, how can i identify which line i'm playing? I though pgn-extract would have something like this, what i need is some way to append the variation name at the end of the line.
Limit to suite:[buster][buster-updates][buster-backports][bullseye][bullseye-updates][bullseye-backports][bookworm][bookworm-updates][bookworm-backports][trixie][sid][experimental]Limit to a architecture: [alpha] [amd64] [arm] [arm64] [armel] [armhf] [avr32] [hppa] [hurd-i386] [i386] [ia64] [kfreebsd-amd64] [kfreebsd-i386] [m68k] [mips] [mips64el] [mipsel] [powerpc] [powerpcspe] [ppc64] [ppc64el] [riscv64] [s390] [s390x] [sh4] [sparc] [sparc64] [x32] You have searched for packages that names contain pgn-extract in all suites, all sections, and all architectures.Found 2 matching packages.
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