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The Retrograde Analysis Corner One or more fairy chess problems . Website with much information on retrograde chess problems.[All Comments] [Add Comment or Rating]
George Duke wrote on Fri, Jan 7, 2011 05:25 PM UTC:Excellent ★★★★★
From 14 years ago and uncommented since at least 2003, these are exactly the two intended links at Betza/Neto Retrochess 1998 below. No comparison which is more interesting, the Betza/Neto cv class or the established genre of ortho-chess problems as a whole. A comment at Retrochess says, ''After un-castling, the King and the Rook are frozen,'' because if they move the Castle would be invalidated. That is used before in plain problems and not too startling with the Betza/Neto objective ultimately to get back to the array. Smullyan has several retrogrades indicated, for one http://www.chessvariants.org/index/displaycomment.php?commentid=23392.