Changelog

4 December 2017

• Added a line to clarify the order of the result codes in the result tag.

24 June 2017

• Put the standard in a github repository on https://github.com/wiegerw/pdn.

9 June 2017

• Added some time control tag examples provided by Igor Le Masson.

1 January 2016

• Made some corrections and improvements to the FEN grammar, noted by Rein Halbersma.
• Added an archived copy of the PDN 2.0 standard, since it is no longer available online.
• Added Zimbabwean pool checkers.

3 May 2014

• Changed the GameType tag for Jamaican draughts: A5 -> A1
• Removed the vertical direction from the Notation field, since in all known cases the notation direction is horizontal.

30 April 2014

• Added a test page for the GameType tag.
• Corrected the description of the notation field of the GameType tag.
• Made some corrections to the GameType table.
  • Pool checkers (unified): A1 -> A0
  • Turkish draughts: A1 -> A0

27 April 2014

• Changed the result type of Frisian draughts to Default.

18 April 2014

• Made some corrections to the gametype table, noted by Rein Halbersma.
  • Russian/Brazilian/Czech: A1 -> A0
  • Spantsiretti: N2 -> A0
  • Thai: black starts, and N1 -> N2
• Added an improved description of move disambiguation, supplied by Ed Gilbert.
• Added a section with proposals for the next version of the standard.

27 May 2013

• Made some improvements to the gametype section, with the help of Jake Cacher.
  • Added game types Jamaican draughts and Pool checkers
  • Added some examples of the board layout of game types
  • Adapted the interpretation of the invert flag in the game type
  • Extended the notation flag of the game type, such that the Jamaican draughts notation is supported
• Added an example for setup commands, supplied by Gérard Taille.
• Added a proposal for the notation null moves, by Gérard Taille.

12 March 2012

• Added a section about character encodings.
• Adapted the allowed values for the Result tag, and added a ResultFormat tag that can be used to specify uncommon result values.
• Added clk, mct, egt and emt embedded commands.
• Added TimeControlWhite and TimeControlBlack tags for specifying individual time settings.
• Added requirements for notation type and capture separators.
• Adapted the grammars to allow alpha numeric moves without separator (a3b4).
• Added documentation about when the full capture notation may/must be used.
• Added requirement about disambiguation of ambiguous moves.
• Added a comment that the empty string is always allowed for a PDN tag value.
• Added line comments starting with a %.
• Added FEN values with unknown color (specified using ?).
• Updated the grammars.
• Updated the PDN checker.