World Draughts Forum

You are right PDN Standards are perfect. All is perfect. No change ! What for is made PDN ? What's the notation to use in tournament ? The World Draughts federation rules are silent about disambiguation and PDN notation ? Maybe it is advisable to apply other rules ? Nevertheless, It seems yet necess...

You are right, if it's only to describe the movement of the player, but the preceding examples show that different movements can reach the same position. In all cases you have to mentally switch between the capturing piece (a king in this case) and the captured pieces or the turning points. I do not...

Hi Wieger, Thank for your attention. Sorry my English is not very fluently. I'm not sure to always use the right word at the right place... I hope you understand what I mean with cycle. It's clear that, in certain cases, the capture can be made in both directions to traverse a loop (which is anecdot...

I maintain that the path or «turning points» belongs to literature rather than the position of the game. I never propose to sort the captured squares to make the notation unique (it was only to easily compare the captured pieces in a draft). I only propose to prefer the natural order for the first ...

1/- Positions change are best described with the captures than with the «turning points» (the path is a means to reach the target, the captures are visible changes, some turning points are conventionnal... ). 2/ - In case of necessary disambiguation, the only original captures (those that are not pr...

The only problem is that you can never compare PDN files without strong calculations to compare games !

Are PDN files made for journalists or novelists to describe the course of the game or for players studying the positions ?

Complements... If the problem given by Gérard Taille post as only one solution 1. 3x38, the preceding has effectively 944 «pseudos-solutions» which can be described by : 32 «pseudo-variants» to the cell 6, for two variants described by : 13x30x6 (22 cases) or 13x34x6 (10 cases), 32 «pseudo-variants...

Thanks for your attention. I understand right that the long notation is only required for ambiguous captures. I understand too that current choice has the advantage that no move generator is needed in order to write a PDN viewer (however calculations are needed for multiple unambiguous jump). It's p...

PDN 3.0 rules provide (See PDN 3.0 Restrictions ) 9.Disambiguated capture sequences have to specify the entire sequence of turning points. A turning point is either the square immediately behind a captured piece, or the square where a turn of direction was made. Leaving out a turning point that is n...