Author: Marc-Olivier Moisan-Plante
Date: 16:31:17 10/17/05
Go up one level in this thread
On October 17, 2005 at 18:47:08, Dann Corbit wrote: >I think that the onus to claim the draw is upon the one in an inferior position. > >From: >http://www.fide.com/official/handbook.asp?level=EE101 > >We have this: >"5.2 The game is drawn when the player to move has no legal move and his king >is not in check. The game is said to end in `stalemate`. This immediately ends >the game, provided that the move producing the stalemate position was legal. > >The game is drawn when a position has arisen in which neither player can >checkmate the opponent`s king with any series of legal moves. The game is said >to end in a `dead position`. This immediately ends the game, provided that the >move producing the position was legal. > >The game is drawn upon agreement between the two players during the game. This >immediately ends the game. (See Article 9.1) > >The game may be drawn if any identical position is about to appear or has >appeared on the chessboard at least three times. (See Article 9.2) > >The game may be drawn if each player has made at least the last 50 consecutive >moves without the movement of any pawn and without any capture. (See Article >9.3)" > >And then this: >"Article 9: The drawn game >9.1 A player wishing to offer a draw shall do so after having made a move on >the chessboard and before stopping his clock and starting the 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cannot be withdrawn and remains valid until the opponent accepts it, rejects it 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 touching a piece with the intention of moving or capturing >it, or the game is concluded in some other way. > >The offer of a draw shall be noted by each player on his scoresheet with a >symbol (See Appendix E13). > >A claim of a draw under 9.2, 9.3 or 10.2 shall be considered to be an offer of a >draw. > >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 a 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, and the player claiming the draw has the move. > >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 that could have been captured en passant >can no longer in this manner be captured or if the right to castle has been >changed temporarily or permanently. > >9.3 The game is drawn, upon a correct claim by the player having the move, if > >he writes his move on his scoresheet, and declares to the arbiter his intention >to make this move which shall result in the last 50 moves having been made by >each player without the movement of any pawn and without any capture, or > >the last 50 consecutive moves have been made by each player without the movement >of any pawn and without any capture. > >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 add three minutes to >the opponent`s remaining time. Additionally, if the claimant has more than two >minutes on his clock the arbiter shall deduct half of the claimant`s remaining >time up to a maximum of three minutes. If the claimant has more than one minute, >but less than two minutes, his remaining time shall be one minute. If the >claimant has less than one minute, the arbiter shall make no adjustment to the >claimant`s clock. 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, provided that the move producing this position >was legal." > >I think that the most salient part is: >"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." > >It seems clear enough that if the draw is not claimed, you can still win the >game. Yes and actually the widely cited theorem by Zermelo, which states (approximatively) that chess could be solved in theory by the minmax algorithm because it is a finite game of perfect information, doesn't apply to chess. According to the actual FIDE rules, chess is potentially an infinite game and even from a theoretical point of view one cannot solve it backward.
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