Author: Uri Blass
Date: 23:44:13 04/26/01
Go up one level in this thread
On April 26, 2001 at 19:09:02, Christophe Theron wrote: >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cannot be withdrawn and remains valid until the opponent accepts it, rejects it 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. No you cannot always do it. Example: [D]rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 after 1.Nf3 Nf6 2.Ng1 Ng8 3.Nh3 Nf6 4.Ng1 Ng8 the position is a draw by third repetition but you cannot make a move in order to get third repetition after your move. Uri
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