Author: Bruce Moreland
Date: 10:25:02 10/01/98
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On September 30, 1998 at 15:57:25, Tim Mirabile wrote: >On September 30, 1998 at 13:57:50, Danniel Corbit wrote: > >>I have changed my mind about EPD. I used to think it was without value, but >>now I work with it almost exclusively! >>Where is the annotation in FEN for the best possible move? >>Where is the annotation in FEN for the moves to avoid? >>Where is the annotation in FEN for depth of study in plies? >>Where is the annotation in FEN for nodes analyzed? >[...] >>How will you do this with FEN? Here is my 180 degree turn (I used to like >>FEN): FEN sucks. I hate FEN. Death is too good for FEN. Down with FEN. >>Destroy FEN. Get rid of it. No, really. > >This all makes no sense to me. EPD and FEN have different uses. FEN is used in >a pgn game database to store a game position and the continuation for which the >initial moves are not known. How can you store the players names and the rest >of the set of PGN tag pairs, plus the remaining moves of the game, in an EPD >string? FEN is something that is used, when I am at a chess tournament, and want to write down the position on one board so I can use it later. I had been using FEN for fifteen years before I discovered that it had an application in computer chess. EPD is something that exists to support test suites, as far as I can tell. It is supposed to let you describe a position and predicted subsequent events. There is no contact with the preceding game context, other than that you have a 50-move counter in the embedded FEN. An odd thing about EPD is that when you do your search, you are expected to do a dump in the form of an EPD. I think this is pretty strange, but apparently useful. PGN is a game archive format. It is supposed to record chess games. That people use it to make suites is something of a corruption of PGN, made possible by support of the FEN tag. For all that, I like the idea of using it for suites, you can take the combinations section of an Informant and just go for it. bruce
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