Author: Sune Fischer
Date: 04:03:54 07/17/05
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On July 17, 2005 at 06:45:59, Reinhard Scharnagl wrote: >On July 17, 2005 at 06:30:28, Sune Fischer wrote: > >>On July 17, 2005 at 04:50:41, Reinhard Scharnagl wrote: >> >>Would a mixture be legal ? >>rnnbkqbr/pppppppp/8/8/8/8/PPPPPPPP/RNNBKQBR w KAhq - 0 1 >> ^^^^ >> >>I guess there must be some implicit request for these new FRC tools to export >>FENs as KQkq whenever possible for backward compability reasons. > >Sune, as I have written on several places, Shredder intends to represent >Chess960 positions (compatible to traditional chess having only castling rights >connected to traditional K-R placements) in two incompatible FENs, depending on >Shredders internal view to the position as normal or Chess960 like. That is >caused by NOT using the X-FEN proposal, nearly established since years. By >additionally switching UCI engines between a normal mode and Chess960 mode >(which is absolutely unnecessary, when following made proposals) actually such a >confusion cannot be avoided in Shredder. Additionally all Chess960 starting >positions generated via SP number will be generated in a new and different FEN. > >Current SMIRF accepts a lot of extended FEN (and thus PGN) variants, but will >write FEN and PGN only using the compatible X-FEN form. > >Reinhard. Hi Reinhard I guess i can understand why you are upset, but AFAIK there has never been a public (democratic!) debate about this so anarchy isn't surprising. For some reason it seems your proposal has just not caught on, so maybe it's a good idea to try something else.. My engine does not know the difference between chess and FRC, there is no difference, thus far I agree with you. Some might decide on a different design, so I have no problem with a GUI that puts the engine into a formal FRC-state. I intend to ignore that part of the protocol completely and I suggest you do the same. Honestly I see no harm done. My only concern is all the old tools (e.g. winboard, SCID) that doesn't understand any FRC fen formal. The engine has to realize when the castle rights coincide with regular chess and then output FENs as KQkq for maximum portability. -S
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