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Subject: Re: King Night Bishop - 50 Moves

Author: Bruce Moreland

Date: 13:27:26 04/22/99

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On April 22, 1999 at 13:05:04, Steve Coladonato wrote:

>At one time, there was a rule in chess that in the case of a known forced mate a
>player was allowed the standard 50 move rule or twice the number of moves with
>best play to execute the mate.  The KNB vs K ending is a 34 move ending  with
>best play.  Therefore a player was allowed 68 moves to effect the mate.  Does
>anyone know if this rule is still in effect?

When you say 34 moves you are quoting the figure that Reuben Fine gives in
"Basic Chess Engines".

That's a great book, but there are numerous errors in it, and this figure is one
of them.

The actual maximum distance to mate is 33.

I don't believe that there ever was a FIDE "double maximum distance" rule.

bruce



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