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Subject: Re: Crafty and draw by repetition ?!

Author: Robert Hyatt

Date: 07:15:29 04/22/00

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On April 22, 2000 at 09:18:45, Dan Andersson wrote:

>Nope you claim a draw, not by making a move but by claiming it. Making a move
>and claiming it is a chess server sillyness. That means any chess program must
>have a separate implementations of 3-fold for 'correct' chess.


playing on a chess server and playing in a game is slightly different.  On the
chess server there isn't an easy way to make the move, claim the draw, and
_then_ press the clock.

In a tournament game, not played on a chess server, crafty does it correctly
as the output looks like this:

My move 14. Nf3

I claim a draw by 3-fold repetition

your move.

Since the operator has to make the move and press the clock, the operator
sees the move, makes it and announces the draw claim while it is still crafty's
move, since the clock has _not_ been pressed.  This is perfectly according to
the rules of chess...

This can't be done on a chess server, although there has been discussion about
eventually being able to send a move like this:

Nf3 [draw]

to solve the small semantic problem of when the draw offer is made and when the
clock is pressed.



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