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Subject: Re: X-FEN converter

Author: F. Huber

Date: 03:31:07 07/23/05

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On July 23, 2005 at 05:20:32, Reinhard Scharnagl wrote:

Ok, then let´s have a look on SMK´s statements:

1)"Those extensions have not been to my taste":
That´s of course his _opinion_, which BTW most others (incl. me) are sharing.
However: that´s not a ´presupposition for´ but simply a ´conclusion from´ his
next statements.

2)"The extension will cause errors":
Absolutely correct! If any of the existing chess-GUIs (not being prepared for
FRC/Chess960) will receive a "KQkq" castling from a FEN, it will assume kings
on e-file and rooks on a/h-file. But in X-FEN even with this "KQkq" the kings
and rook could be located almost ´anywhere´ - so what do you think the GUI
will do, when getting any castling move (O-O, O-O-O) during the game replay,
without even finding both pieces on their original places??
In the best case th GUI will simply produce nonsense, in the worst case it may
even crash - both of course are "errors", as mentioned in the above statement!

3)"Similiar looking FEN positions will have a different meaning":
Of course this is also only related to castling rights. In X-FEN really _every_
of the 960 starting positions has the _same_ castling tag "KQkq", although they
have indeed a _completely_different_ meaning (i.e. other positions of king and
rooks, and therefore also an other move sequence).

4)"Chess960 finally is not compatible to traditional Chess":
Again absolutely correct! Chess960 is a superset of classical chess, and the
big majority (942/960) of the starting positions are definitely _contradicting_
the classical chess rules (with regard to castling)!
Would you call this ´compatible´?? (If ´yes´, you´ll certainly be the only one)

Well, that´s now really my last statement about this annoying X-FEN disussion,
but of course feel free to continue your boring campaign to persuade (or even
try to force) people to use this crazy X-FEN format by spamming almost every
chess forum in this wide world with your X-FEN ´informations´(?).
But wait another half year - then you´ll get answers like this:
"What the hell is X-FEN?" ;-)

(oder auf gut Deutsch: "Welche Hahn wird dann noch nach X-FEN krähen?")

Franz.



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