Chess Pgn File Format
Portable Game Notation (PGN) is a plain text computer-processible format for recording chess games (both the moves and related data), supported by many chess programs.
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Abusive behaviour and discrimination against others will not be tolerated. Do not post content, memes, jokes, videos or images that don't offer useful chess insight. Consider posting such content to our sister subreddit,. If you post your own games, include your own annotations.
Don't ask for advice about games in progress. Wrap your PGNs with pgn and /pgn (without the spaces) to allow users to see the game as an interactive chess board. Chess Spoiler format for problem answers etc., Spoiler(#s 'Ng5!' ). Do not post direct links to, or links to sites hosting, pirated content. Do not post NSFW material. When posting positions, title them appropriately - White to move and win, What's the best line for black?, Mate in 5 etc.
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Popcap games bejeweled classic. all things crazyhouse Notes Please continue to on how we can help make better for everyone. Since it was introduced more than twenty years ago, has been by far the most widespread and portable format for exporting, importing and sharing annotated chess games in the software world. Even today, it remains a fundamental part of computer chess infrastructure.
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However, as groundbreaking as PGN was back when it was introduced (at a time where no open and widely implemented document format for chess games existed), time has moved on, and modern chess software struggles to work around the various limitations in PGN. At Play Magnus, we're working on a new chess game file format that we hope can replace PGN in the future, and that can also be used in many situations where the limitations in PGN makes it too awkward to use. We already use an early version of this new format internally. It will take a while before we are ready to publish a specification, for a number of reasons: The format is still rapidly evolving, as we keep discovering new features that we need. Along with the specification itself, we'd like to have some open source libraries for reading and manipulating games in the new format, as well as some friendly end-user software for producing and consuming content. And finally, since we've got an awful lot of other work to do, we can't prioritize this task as much as I'd like. We don't expect the new format to be ready for external use before some time towards the end of the year (and that's an optimistic estimate).
The reason we bring up the work on the new format so far in advance is that we'd like to give the wider community a chance to share their thoughts about what they want to see in the new format, and what limitations in PGN annoy them the most. Here are a few of the most significant weaknesses and limitations we've identified so far:.
PGN is designed to be somewhat humanly readable, at the expense of making it harder for computer software to parse and produce. We believe this is a design mistake. Few users read PGN without the help of some kind of software anyway, and writing a working PGN parser is needlessly hard – even more so because in practice you also need to be able to parse all the subtly broken PGN that's produced by other programs that fail to implement the spec 100% correctly. PGN is ASCII encoded, making it unsuitable for both player names and textual annotations in most of the world. A modern format should obviously support Unicode (in fact, many recent implementations of PGN do permit Unicode, even though this is technically breaking the standard).
No support for including engine analysis in the game. Various programs do support annotating games with engine analysis, but only using the standard PGN mechanisms of comments and recursive annotation variations. Data like search depths and evaluations are included as textual comments, and the syntax of these comments vary from program to program. This makes it difficult to exchange computer annotated games between different pieces of software. No support for formatted text in comments – not even paragraphs.
In our new format, we're toying with the idea of using some kind of Markdown for comments, including support for things like images, videos and hyperlinks. No top-level elements other than games. We'd like to be able to group the games into rounds and tournaments, and to produce ebook-like documents with chapters and text between the games.
Variations can only appear after the main move in a position, and not before. Often the annotator wants to present some variations before the move that was played in the game, in order to explain her choice of move. For instance, it is not unusual to first present the move you were originally planning to play along with some variations, the explain why you decided that it doesn't work, and how you arrived at some other move (the one you ended up playing) instead. No support for null moves in variations.
This makes it impossible to annotate a move with something like 'threatening 31. H6, with a strong attack' (except in a purely textual comment, where you can't play through the moves). If you have other PGN annoyances you would like to see addressed in a new format (or if you have comments to the above list), please let us know about them, and there's a chance we can consider your wishes while developing the format. Absolutely, that's what we hope to do.
We want to have tools available right from the beginning that are sufficiently awesome that people will immediately want to use them. Whether we'll succeed is still an open question, of course, since we still have limited resources and too much other work.
Ideally, once you have finalized a '1.0' spec, you should inject it into as many popular open source projects as possible (first thing that comes in mind is Scid, Lichess and the likes. And of course Stockfish;) ) so that it sees immediate application in tools people are familiar with. In my opinion, a proposal for a PGN alternative should retain a couple of major features, like:. Be entirely text based.
Png File Format
Unicode, sure, but still pure text. You're Tord Romstad, one of the creators of Stockfish? Not that this makes my ideas more (nor less) worth considering. What kind of file format are you envisioning? See my reply to elsewhere in this thread, but keep in mind that this is still rapidly evolving, and that the surface syntax is likely to change. Would it be compatible with (an updated version of) PGN? It will be easy to import PGN without any loss of information, and possible to export to PGN without loss of information, although the information will be awkward to extract in the latter case.
At the moment, the first 4 moves in a QGD looks like this: :game :headers 'Event' '?' 'Site' '?' 'Date' '?' 'Round' '?' 'White' '?' 'Black' '?'
'Result' '.' :moves 'd2d4' 'd7d5' 'c2c4' 'e7e6' 'b1c3' 'g8f6' 'c1g5' The surface syntax may very well change. We're using plain Clojure data now, because we work in Clojure and representing games by Clojure data eliminates all parsing work entirely. When introducing this to the outside world, it's possible that some other surface syntax (possibly JSON based?) would be more convenient, but structurally it would remain similar. The format consists of nested vectors, where the first element of each vector is a keyword that represents the element type, and the remaining elements are the contents. Extending the above example a little with a comment: :game :headers 'Event' '?'
'Site' '?' 'Date' '?' 'Round' '?'
'White' '?' 'Black' '?'
'Result' '.' :moves 'd2d4' 'd7d5' 'c2c4' :comment 'The Queen's Gambit' 'e7e6' 'b1c3' 'g8f6' 'c1g5' Variations are handled similarly, using a vector consisting of a:variation keyword followed by a sequence of moves (or comments, sub-variations, etc.). This system can easily be extended with new keywords (including for purposes not envisioned in the spec), and if a particular piece of software doesn't understand one of them, it can just choose to ignore it.
An example of something we already have which we think would be useful for annotating games is a:diagram element type that allows you to insert a diagram into the notation, optionally including arrows and highlighted squares. Sure, it would be possible to include this into PGN comments in some hackish fashion, but it would be trickier to implement, and would look ugly in any piece of software that didn't support this particular comment convention.