PGNPack - Revision history

Ross-spencer: Undo revision 44257 by Ross-spencer (talk)

2023-03-06T12:45:23Z

Undo revision 44257 by Ross-spencer (talk)

Ross-spencer: Added thoughts on identification for standard PGN files

2023-03-06T12:38:13Z

Added thoughts on identification for standard PGN files

Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|ppk}} |released=1996 }} :''Not to be confused with PGMPAK.'' '''PGNPack''' is a utility that com..."

2022-02-14T16:37:24Z

Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|ppk}} |released=1996 }} :''Not to be confused with PGMPAK.'' '''PGNPack''' is a utility that com..."

New page

{{FormatInfo
|formattype=electronic
|subcat=Compression
|extensions={{ext|ppk}}
|released=1996
}}
:''Not to be confused with [[PGMPAK]].''

'''PGNPack''' is a utility that compresses a [[PGN]] file to a special '''.PPK''' format. It was developed by Paul W. Onstad.

== Discussion ==
PGN is a format that usually contains a record of one or more chess games.

The purpose of PGNPack is not immediately obvious, but part of it seems to be that the PPK file remains email-compatible (at least for small values of "email-compatible").

PGNPack is a Windows 3.x (GUI) program with a somewhat unusual command-line interface.

The "Version 1.0 (beta)" release may have been the only one.

== Identification ==
PPK files made by PGNPack v1.0-beta start with ASCII "{{magic|@1.0 (beta)}}", followed by bytes {{magic|0x0d 0x0a}}.

== Software ==
* PGNPack v1.0-beta:
** {{SACFTPURL|pack|pgnpack.zip}}
** {{CdTextfilesURL|swextrav8/swextrav8-2/gamchess/pgnpack.zip}}
** https://pushedpawn.org/downloads/prgs/ → pgnpack.zip

== Sample files ==
* {{CdTextfiles|swextrav8/swextrav8-2/gamchess/pgnpack.zip|pgnpack.zip}} → TRIAL.ZIP → TRIAL.PPK

[[Category:Saved Games]]
[[Category:Transfer Encodings]]
[[Category:Recompression]]

← Older revision		Revision as of 12:45, 6 March 2023
Line 19:		Line 19:

	== Identification ==		== Identification ==
−
−	~~=== PGN Standard Formats ===~~
−
−	There are two PGN formats, the PGN Import format, and PGN Export format. The PGN import format allows for manually prepared data, and asks the reader to be flexible in how it interprets potentially inconsistent data a la Postel's law. The PGN Export Format is more concisely described, and we can see more about the export format below.
−
−	~~==== PGN Export Format ====~~
−
−	~~Characters are stored in the PGN export format as bytes using the ISO 8859/1 Latin-1 (ECMA-94) code set.~~
−
−	The PGN export format uses a specific order of tags called the Seven Tag Roster. These tags are described as <i>"a set of tags defined for mandatory use for archival storage of PGN data."</i> <i>"The interpretation of these tags is fixed as is the order in which they appear"</i>. The tags are as follows:
−
−	* Event (the name of the tournament or match event)
−	* Site (the location of the event)
−	* Date (the starting date of the game)
−	* Round (the playing round ordinal of the game)
−	* White (the player of the white pieces)
−	* Black (the player of the black pieces)
−	* Result (the result of the game)
−
−	A commonly cited example of the PGN format using the seven tag rotation is the 1992 match played in Yugoslavia between Bobby Fischer and Boris Spassky. This example is also described in the PGN standard.
−
−	~~<pre>~~
−	~~[Event "F/S Return Match"]~~
−	~~[Site "Belgrade, Serbia JUG"]~~
−	~~[Date "1992.11.04"]~~
−	~~[Round "29"]~~
−	~~[White "Fischer, Robert J."]~~
−	~~[Black "Spassky, Boris V."]~~
−	~~[Result "1/2-1/2"]~~
−
−	~~1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3~~
−	~~O-O 9. h3 Nb8 10. d4 Nbd7 11. c4 c6 12. cxb5 axb5 13. Nc3 Bb7 14. Bg5 b4 15.~~
−	~~Nb1 h6 16. Bh4 c5 17. dxe5 Nxe4 18. Bxe7 Qxe7 19. exd6 Qf6 20. Nbd2 Nxd6 21.~~
−	~~Nc4 Nxc4 22. Bxc4 Nb6 23. Ne5 Rae8 24. Bxf7+ Rxf7 25. Nxf7 Rxe1+ 26. Qxe1 Kxf7~~
−	~~27. Qe3 Qg5 28. Qxg5 hxg5 29. b3 Ke6 30. a3 Kd6 31. axb4 cxb4 32. Ra5 Nd5 33.~~
−	~~f3 Bc8 34. Kf2 Bf5 35. Ra7 g6 36. Ra6+ Kc5 37. Ke1 Nf4 38. g3 Nxh3 39. Kd2 Kb5~~
−	~~40. Rd6 Kc5 41. Ra6 Nf2 42. g4 Bd3 43. Re6 1/2-1/2~~
−	~~</pre>~~
−
−	~~===== Example PRONOM signature =====~~
−
−	~~An example PRONOM signature may be:~~
−
−	~~<pre>~~
−	5B4576656E742022{0-}225D{0-1}(0D0A\|0A)5B536974652022{0-}225D{0-1}(0D0A\|0A)5B446174652022{0-}225D{0-1}(0D0A\|0A)5B526F756E642022{0-}225D{0-1}(0D0A\|0A)5B57686974652022{0-}225D{0-1}(0D0A\|0A)5B426C61636B2022{0-}225D{0-1}(0D0A\|0A)5B526573756C742022{0-*}225D{0-1}(0D0A\|0A)
−	~~</pre>~~
−
−	~~However, there are weaknesses with this approach described here: https://groups.google.com/g/pronom/c/OIWiXqhZqNU/m/57eP8o1aAAAJ~~
−
−	~~=== PGNPack ===~~
−
	PPK files made by PGNPack v1.0-beta start with ASCII "{{magic\|@1.0 (beta)}}", followed by bytes {{magic\|0x0d 0x0a}}.		PPK files made by PGNPack v1.0-beta start with ASCII "{{magic\|@1.0 (beta)}}", followed by bytes {{magic\|0x0d 0x0a}}.

← Older revision		Revision as of 12:38, 6 March 2023
Line 19:		Line 19:

	== Identification ==		== Identification ==
		+
		+	=== PGN Standard Formats ===
		+
		+	There are two PGN formats, the PGN Import format, and PGN Export format. The PGN import format allows for manually prepared data, and asks the reader to be flexible in how it interprets potentially inconsistent data a la Postel's law. The PGN Export Format is more concisely described, and we can see more about the export format below.
		+
		+	==== PGN Export Format ====
		+
		+	Characters are stored in the PGN export format as bytes using the ISO 8859/1 Latin-1 (ECMA-94) code set.
		+
		+	The PGN export format uses a specific order of tags called the Seven Tag Roster. These tags are described as <i>"a set of tags defined for mandatory use for archival storage of PGN data."</i> <i>"The interpretation of these tags is fixed as is the order in which they appear"</i>. The tags are as follows:
		+
		+	* Event (the name of the tournament or match event)
		+	* Site (the location of the event)
		+	* Date (the starting date of the game)
		+	* Round (the playing round ordinal of the game)
		+	* White (the player of the white pieces)
		+	* Black (the player of the black pieces)
		+	* Result (the result of the game)
		+
		+	A commonly cited example of the PGN format using the seven tag rotation is the 1992 match played in Yugoslavia between Bobby Fischer and Boris Spassky. This example is also described in the PGN standard.
		+
		+	<pre>
		+	[Event "F/S Return Match"]
		+	[Site "Belgrade, Serbia JUG"]
		+	[Date "1992.11.04"]
		+	[Round "29"]
		+	[White "Fischer, Robert J."]
		+	[Black "Spassky, Boris V."]
		+	[Result "1/2-1/2"]
		+
		+	1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
		+	O-O 9. h3 Nb8 10. d4 Nbd7 11. c4 c6 12. cxb5 axb5 13. Nc3 Bb7 14. Bg5 b4 15.
		+	Nb1 h6 16. Bh4 c5 17. dxe5 Nxe4 18. Bxe7 Qxe7 19. exd6 Qf6 20. Nbd2 Nxd6 21.
		+	Nc4 Nxc4 22. Bxc4 Nb6 23. Ne5 Rae8 24. Bxf7+ Rxf7 25. Nxf7 Rxe1+ 26. Qxe1 Kxf7
		+	27. Qe3 Qg5 28. Qxg5 hxg5 29. b3 Ke6 30. a3 Kd6 31. axb4 cxb4 32. Ra5 Nd5 33.
		+	f3 Bc8 34. Kf2 Bf5 35. Ra7 g6 36. Ra6+ Kc5 37. Ke1 Nf4 38. g3 Nxh3 39. Kd2 Kb5
		+	40. Rd6 Kc5 41. Ra6 Nf2 42. g4 Bd3 43. Re6 1/2-1/2
		+	</pre>
		+
		+	===== Example PRONOM signature =====
		+
		+	An example PRONOM signature may be:
		+
		+	<pre>
		+	5B4576656E742022{0-}225D{0-1}(0D0A\|0A)5B536974652022{0-}225D{0-1}(0D0A\|0A)5B446174652022{0-}225D{0-1}(0D0A\|0A)5B526F756E642022{0-}225D{0-1}(0D0A\|0A)5B57686974652022{0-}225D{0-1}(0D0A\|0A)5B426C61636B2022{0-}225D{0-1}(0D0A\|0A)5B526573756C742022{0-*}225D{0-1}(0D0A\|0A)
		+	</pre>
		+
		+	However, there are weaknesses with this approach described here: https://groups.google.com/g/pronom/c/OIWiXqhZqNU/m/57eP8o1aAAAJ
		+
		+	=== PGNPack ===
		+
	PPK files made by PGNPack v1.0-beta start with ASCII "{{magic\|@1.0 (beta)}}", followed by bytes {{magic\|0x0d 0x0a}}.		PPK files made by PGNPack v1.0-beta start with ASCII "{{magic\|@1.0 (beta)}}", followed by bytes {{magic\|0x0d 0x0a}}.