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Subject: Re: About draws and chessprograms - a chessplayer's view

Author: Robert Hyatt

Date: 07:47:24 04/29/01

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On April 29, 2001 at 05:10:24, Peter Berger wrote:

>On April 29, 2001 at 00:59:57, Robert Hyatt wrote:
>
>>On April 28, 2001 at 16:41:23, Peter Berger wrote:
>>
><snip>
>>
>>I disagree.  Crafty can't "move pieces" on a real board.
>
>This isn't important here IMHO - Crafty understands the concept of a move very
>well .
>



True.  But it _also_ "understand" that it is talking to a human that will
have to make the move and stop the clock.



>  But in any case,
>>I have never seen the rule state that you can _not_ make the move on the board.
>>The rule simply has always been that you must claim the draw on _your_ time.
>>Then the arbiter confirms the repetition.  In the case of computers, that is
>>obviously not necessary, but crafty says:
>>
>>"my move is 49.  Rc8+
>>
>>"The game is a draw by repetition"
>>
>>then it waits for whatever happens next...
>>
>>I don't see how a computer could do it any differently.
>
>It could say :
>
>"The game is a draw by repetition"
>
>In case the position on the board is a 3rd repetition it should say nothing else
>.



It does that.  If the position is repeated _before_ it has to move, it does
not make a move at all, it just claims the draw.


>
>In case the 3rd repetition position will be reached by a certain move it could
>say :
>
>" I intend to play 49. Rc8+ and claim draw by repetition ."
>
>That ICC and WinBoard/XBoard currently don't support doing it like this doesn't
>mean it can't be done at all . An enhancement of the WinBoard protocol adding a
>"claimdraw" as Miguel A. Ballicora suggested would be a good start .

If it was done in winboard and winboard was made compatible with _all_
chess servers, this would be easy.  But not all servers handle that case,
meaning winboard would have to behave as it does now for those servers that
don't...





>
>>
>>I have seen that scenario played in major WC type events.  I once watched
>>Korchnoi do exactly that in a US Open game...  He made the move on the board,
>>wrote it down, claimed a draw, and got the arbiter...
>
>I don't get your point here - so Korchnoi did wrong ..; the rule explains
>exactly how it should be done .
>
>pete


If I am not mistaken, "your move is not completed until you press the clock
button to stop your clock and start your opponent's clock."  Therefore making
the move on the board does not invalidate a draw claim.



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