Author: Christophe Theron
Date: 16:09:02 04/26/01
Go up one level in this thread
On April 26, 2001 at 16:19:10, Peter Berger wrote: >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cannot be withdrawn and remains valid until the opponent accepts it, rejects it 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 ) . Well... I remember that I had to deal with this discussion already. At that time I had read the rules again and concluded that the way computers do it was OK. Maybe I did not have the same rules as you (?!). Anyway, in case of a draw by repetition, if the game is drawn by repetition by the last move of the opponent, then I can ALWAYS make another move that will also be a draw by repetition. So in the end it does not matter much if I claim the draw before of after making the move. However I agree that chess programs to not obey to your above rules (but could you please provide a copy of article 12.5?). In the case of the 50 moves rules, I'm not sure. It could be that in some positions the game could have been claimed a draw by the opponent, but he did not claim it. Then it's my turn to move, and it could be that I have to make a move that "resets" the 50 moves counter (for example if I am forced to move a pawn). So in this case claiming the draw before moving is probably incorrect, seldomly. Christophe
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