Author: Reinhard Scharnagl
Date: 06:19:39 01/10/04
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On January 10, 2004 at 08:59:57, Michel Langeveld wrote: >>-------------------------------------------------- >>Well, we just have to be downwards compatible only. >>-------------------------------------------------- >> >>add '9' for 9 empty fields, '0' for 10 empty fields. >> >>Both never would apply in classic chess FEN positions. >Then you are compatible with the fact that the empty field indicator is >one character. And that is not enforced by the specification. Enforced is a >number from 1 to 8 and this results in that it is one character now. The extended castling piece type block has to be omitted completly when empty. Well we must lern, that the old well working specification does not cover variants like FRC or 10x8 boards. Therefore something MUST be added, but applied to CONVENTIONAL chess positions it should make NO DIFFERENCE there. Such is fullfilled with the FRC-FEN proposal I made at [http://www.rescon.de/Compu/fullchess5_e.html], which would be additionally needed, when shuffled positions with castlings also should be supported. >It is never possible to write correct PGN games without changing the PGN >specification. The '0' option is functional bad. This is the order I prefer: > >[FEN "rnbqckabnr/pppppppppp/10/10/10/10/pppppppppp/RNBQCKABNR"] >[FEN "rnbqckabnr/pppppppppp/////pppppppppp/RNBQCKABNR"] >[FEN "rnbqckabnr/pppppppppp/0/0/0/0/pppppppppp/RNBQCKABNR"] > >and I can live with the 2nd. The problem with the second is, that the first encoded row will specify the board width, whether from 'a' to 'h' or 'j'. Therefore omitting trailing empty squares would not by possible there. Without this I would prefer the second method. But I think it is better to stay with the last one solution. >I am curious what Steve Edward's opinion is about this. >He maintainces the standard. I remember there is just a redesigning in process, but of course nobody would have thought of our wishes today to expand FENs meaning. Regards, Reinhard.
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