Author: Omid David Tabibi
Date: 15:56:27 01/04/03
[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)
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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