Author: Terry McCracken
Date: 21:02:13 01/04/03
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On January 04, 2003 at 18:56:27, Omid David Tabibi wrote: >[D] 4R3/8/8/8/8/8/8/R3K2k w Q - 0 1 > >The last two moves were e8=R Kh1. > >Now how can white mate in 1? I bet no program can find the mate in one move... > >Think for a minute... (answer below) > Cute, I thought about 0-0-0 but of course that can't mate in 1 move, and the solution is an illegal one, so I decided that mate in one is untrue, and of course it is a false mate, as the rules say no. But amusing. > > > > > > > > > > > > > > > > > > > > > >O-O-O-O# > >[D] 8/8/8/8/8/4K3/4R3/R6k b - - 0 1 > >According to FIDE rules, this move (long long castle) is perfectly legal. > >Let's see the "castling" section (as appearing on Fide Laws of Chess 1997 >http://www.marochess.de/chess/fidelaws): > >------------------------------------------------------------------------------- >(ii) 'castling'. This is a move of the king and either rook of the same colour^, >counting as a single move of the king and executed as follows: the king is >transferred from its original square two squares towards the rook, then that >rook is transferred over the king to the square the king has just crossed. > > (1) Castling is illegal: > > [a] if the king has already been moved, or > [b] with a rook that has already been moved > > (2) Castling is prevented for the time being: > > [a] if the square on which the king stands, or the square which > it must cross, or the square which it is to occupy, is attacked by > one or more of the opponent's pieces. > [b] if there is any piece between the king and the rook with which > castling is to be effected. >------------------------------------------------------------------------------- > >Our move (O-O-O-O) perfectly complies with the rules, the white king has never >been moved (see the castling rights in the posted FEN), and also the e8 rook has >never been moved. We transfer the king two squares towards the rook, then >transfer that rook over the king to the square the king has just crossed. > >:-) > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > >^ Actually the FIDE rules says "on the same rank" :-) >[sorry for the post folks, couldn't resist until April 1st!]
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