Author: Uri Blass
Date: 09:21:18 07/27/05
Go up one level in this thread
On July 27, 2005 at 12:13:30, Keith Evans wrote: >On July 27, 2005 at 12:01:49, Reinhard Scharnagl wrote: > >>On July 27, 2005 at 11:49:52, F. Huber wrote: >> >>>On July 27, 2005 at 11:31:05, Reinhard Scharnagl wrote: >>> >>>>On July 27, 2005 at 11:19:07, F. Huber wrote: >>>> >>>>>On July 27, 2005 at 10:28:55, Reinhard Scharnagl wrote: >>>>> >>>>>>On July 27, 2005 at 09:42:55, Uri Blass wrote: >>>>> >>>>>>>As far as I understand there is already a tool to translate Shredder's notation >>>>>>>to your notation and the opposite(see >>>>>>>http://www.volker-pittlik.name/wbforum/viewtopic.php?t=3135). >>>> >>>>>>Second, the "Converter" cannot be bidirectional, because the FEN Shredder has >>>>>>chosen simply is incompatible. >>>> >>>>>What a NONSENSE! >>>>> >>>>>It would take me no more than 10 minutes to implement the reverse direction too, >>>>>but I simply don´t want to convert a logical, modern and easily understandable >>>>>FEN-format into the ancient X-FEN! Point! >>>> >>>>Franz, >>>> >>>>if it would help you: it is not the fault of your tool. >>> >>>I really don´t need any help, Reinhard! ;-) >>> >>>>But fact is, that on Shredders side there are *two* FENs for *one* position. >>>>Ant thus there could not be bidirectional converting functions, full stop. >>> >>>I always thought you are a programmer - but now I´m really in doubt about it! >>>Do you really want to say that it´s impossible to convert both following strings >>>"rqbnkbnr/pppppppp/8/8/8/8/PPPPPPPP/RQBNKBNR w KQkq -" and >>>"rqbnkbnr/pppppppp/8/8/8/8/PPPPPPPP/RQBNKBNR w HAha -" into the first one, i.e. >>>into X-FEN? >>>Have you ever heard about an ´IF´ statement? >>>It exists in ´C´, ´Pascal´, even in ´Basic´ ... ;-) >>> >>>Do you need an example in natural language? >>>"IF CastleTag is ´HAha´ THEN convert it to ´KQkq´ ELSE do nothing!" >>> >>>I hope, I could help improving your programming skills ... :-) >> >>Franz, >> >>you must have done big efforts to continue to misunderstand my point of view: >> >>There is no pair of functions f() and f_invert() so that f_invert(f(x)) == x >>when x is any of Shredder's possible FENs. >> >>Reinhard. > >Please give one specific example of when this is not possible. This would help >to demonstrate your point. > >Keith He already did it. When you translate from Shredder-FEN to X-FEN you get f(rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -)= f(rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w HAha -) so you cannot have f_invert(f(x)) == x I think that it is not a problem because FRC and chess are 2 different games from shredder point of view so there is no problem in translation X_FEN to FRC(you cannot translate X_FEN to shredder without knowing if it is shredder in FRC mode or Shredder in chess mode). Uri
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