Author: Heiner Marxen
Date: 13:51:06 03/07/02
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On March 07, 2002 at 14:26:32, Terry McCracken wrote: >On March 07, 2002 at 12:40:27, Heiner Marxen wrote: > >>On March 07, 2002 at 12:11:12, Terry McCracken wrote: [snip] >>>Then explain how please to give the correct FEN for this position, thanks. >> >> >>In a strict sense this is not possible. FEN demands to include the exact >>castling rights. Without them it is not a FEN notation. >> >>So, you cannot use FEN to pose a "chess problem". Not always, at least, >>as we see from this example. >> >>Using some prefix of a FEN to state a "chess problem" seems to be a useful >>coding attempt. But strictly speaken, "it is no FEN". So it be. >> >>Piece? >> >>Cheers, >>Heiner >> >Thanks Heiner! Maybe something can be done to fix this anomalous type of "chess >problem" in the future adding some new code to FEN or some kind of work around? >It would helpful that's for sure!:) Well, as long as "normal" "chess problems" are to be coded, FEN or EPD is a good starting point. A shortened FEN notations captures most of it, except the stipulation. That can sometimes be coded with the keywords of EPD (dm and ce). To get the effect of not specifying e.g. castling rights, we could insert question marks in the appropriate places, thus retaining the token syntax of EPD. To be clear: the result of such usage would neither be FEN nor EPD. Pick some other name, like IFEN for "incomplete FEN" or whatever. Just pick a new name. May be some day your new notation makes it into a revised FEN/EPD/PGN standard, but until then... Regarding trick things like quarters of moves... I don't think, that it would be worthwhile to make a notation for that. Stick to normal language. And for diagrams, just use the [D] thing, a shortened FEN, not omitting the side to move, but all of the rest seems to be ignored by the diagram generator. Again, lets not call this FEN, but rather, say, DN for diagram notation. Well, since it does accept FEN and EPD, you may call it FEN and EPD if you do use that :-) >"Piece":) LOL! This was a very funny typo of mine. It was not intended, but funny. >Terry Cheers, Heiner
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