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Subject: Re: Chess960 : X-FEN information

Author: Reinhard Scharnagl

Date: 08:18:59 10/28/05

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See also http://www.chessbox.de/xfen_e.html .

X-FEN and Shredder-FEN thechnically will work both. But only X-FEN will keep
full compatibility to already existing position encodings in FEN.

Simply inspect the traditional starting array. With Shredder it depends
on the view you have. Seeing the identical Chess960 SP-518 you will create
different FEN strings. Same will be true for all positions derived from one of
the 18 Pseudo FRC positions, as long as there are castling possibilities.

Thus Shredder FEN is incompatible and ambiguous.

Reinhard.



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