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Subject: Shortest Proven Mate Finder for Macintosh - Sigma Chess Lite

Author: Richard A. Fowell

Date: 10:09:19 04/20/02

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From the Sigma Chess Lite (Macintosh freeware from www.sigmachess.com) manual:

The Mate Finder Levels

  Sigma Chess uses a specialized search algorithm for solving mate problems.
First you specify the (maximum) number of moves to mate, and then you invoke the
mate finder via the Go command.

  If no mate is found, a dialog appears stating this. If a mate is found, you
will be given the option of either canceling the mate search, continuing the
search for alternative solutions (called cooks) or accepting the solution. If
you accept the solution, Sigma Chess will play the move (called the key) and
decrease the mate level by one. This way you can play through the mate sequence
move by move.

-Richard A. Fowell
===================

On April 20, 2002 at 09:51:37, Gian-Carlo Pascutto wrote:

>On April 20, 2002 at 09:44:17, Keith Ian Price wrote:
>
>>It is more difficult than that. Sjeng does not find the mate in 14 here. He has
>>the correct moves up to g4g3, then starts moving the bishop again, instead of
>>moving the king to f3.
>
>Yes. It's a matefinder, not a shortest-proven-mate-finder.
>
>AFAIK, Chest is the only program that truly does the latter.
>
>--
>GCP



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