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Subject: Re: Gambit Tiger 2.0: 6 seconds on K6-2 450

Author: Peter Berger

Date: 13:19:10 04/26/01

Go up one level in this thread


On April 26, 2001 at 15:29:16, Christophe Theron wrote:

>On April 25, 2001 at 17:31:10, Peter Berger wrote:
>>It's similar when it is about proper implementation of draw rules btw . Offering
>>draws is only allowed when you have showed your move ; claiming draw by
>>repetition or 50 moves rule - this should be done by claiming draw saying : " I
>>reach draw by playing blablabla . " - no program does this properly .
>
>
>
>As far as I know you can claim a draw by repetition or 50 moves rules either
>before or after you move.
>
>As soon as the condition for the draw is met, you can claim it. The condition
>can be met before you move, so you can claim a draw before you move.
>
>
>
>    Christophe

OK ; let's get nerdish :

Article 9: The drawn game

9.1 A player can propose a draw after making a move on the chessboard. He must
do so before stopping his own clock and starting his opponent's clock. An offer
at any other time during play is still valid, but Article 12.5 must be
considered. No conditions can be attached to the offer. In both cases the offer
cannot be withdrawn and remains valid until the opponent accepts it, rejects it
orally, rejects it by making a move, or the game is concluded in some other way.

The offer of a draw shall be noted by each player on his scoresheet with the
symbol (=).

9.2 The game is drawn, upon a correct claim by the player having the move, when
the same position, for at least the third time (not necessarily by repetition of
moves)

is about to appear, if he first writes his move on his scoresheet and declares
to the arbiter his intention to make this move, or
has just appeared.
Positions as in (a) and (b) are considered the same, if the same player has the
move, pieces of the same kind and colour occupy the same squares, and the
possible moves of all the pieces of both players are the same.
Positions are not the same if a pawn could have been captured en passant or if
the right to castle immediately or in the future has been changed.


9.3 The game is drawn, upon a correct claim by the player having the move, if

he writes on his scoresheet, and declares to the arbiter his intention to make a
move which shall result in the last 50 moves having been made by each player
without the movement of any pawn and without the capture of any piece, or
the last 50 consecutive moves have been made by each player without the movement
of any pawn and without the capture of any piece.


9.4 If the player makes a move without having claimed the draw he loses the
right to claim, as in Article 9.2 or 9.3, on that move .

9.5 If a player claims a draw as in Article 9.2 or 9.3 he shall immediately stop
both clocks. He is not allowed to withdraw his claim.

If the claim is found to be correct the game is immediately drawn.
If the claim is found to be incorrect, the arbiter shall deduct half of the
claimant's remaining time up to a maximum of three minutes and add three minutes
to the opponent's remaining time. Then the game shall continue and the intended
move must be made.

9.6 The game is drawn when a position is reached from which a checkmate cannot
occur by any possible series of legal moves, even with the most unskilled play.
This immediately ends the game.


You are right - repeating the rules of chess is still useful though I think .
There is a proper way of doing it ( the one I mentioned ) ; there are also some
exceptions which are tolerated ( like the ones you mentioned ) and then there
are the things which are simply not considered OK ( like the way all commercial
programs who are able to offer draw except Gandalf do it ) .





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