Difference between revisions of "Fifty-move Rule"

From Chessprogramming wiki
Jump to: navigation, search
Line 56: Line 56:
 
* [http://www.talkchess.com/forum/viewtopic.php?t=64853 Fifty move counter and Null move] by Tamás Kuzmics, [[CCC]], August 09, 2017 » [[Halfmove Clock]], [[Null Move Pruning]]
 
* [http://www.talkchess.com/forum/viewtopic.php?t=64853 Fifty move counter and Null move] by Tamás Kuzmics, [[CCC]], August 09, 2017 » [[Halfmove Clock]], [[Null Move Pruning]]
 
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69750 changing the 50 move rule to 5 move rule] by [[Uri Blass]], [[CCC]], January 28, 2019
 
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=69750 changing the 50 move rule to 5 move rule] by [[Uri Blass]], [[CCC]], January 28, 2019
+ [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72308 50 move counter in FEN and GUIs] by [[Jouni Uski]], [[CCC]], November 12, 2019
+
* [http://www.talkchess.com/forum3/viewtopic.php?f=2&t=72308 50 move counter in FEN and GUIs] by [[Jouni Uski]], [[CCC]], November 12, 2019
  
 
=External Links=
 
=External Links=

Revision as of 10:24, 17 November 2019

Home * Chess * Draw * Fifty-move Rule

The Fifty-move rule states that a game of chess is considered drawn after fifty consecutive full moves without a capture or a pawn move. If the last move of such series delivers a checkmate, this takes precedence over the 50 move rule. Inside a chess program, the halfmove clock takes care of enforcing fifty-move rule. If the halfmove clock becomes greater or equal than 100, and the side to move has at least one legal move, a draw score should be assigned to that node, with appropriate protocol handling and game state transitions, if the node is already the root and there is no mate in one.

Fide Rule

9.3 The game is drawn, upon a correct claim by the player having the move, if [1]

a) 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

b) the last 50 consecutive moves have been made by each player without the movement of any pawn and without any capture. 

Since July 01, 2014

Since July 01, 2014 75 moves without capture and pawn move end the game even without a claim [2]

9.6  If one or both of the following occur(s) then the game is drawn: 

a) the same position has appeared, as in  9.2b, for at least five consecutive alternate moves by each player.  

b) any consecutive series of 75 moves have been completed by each player without the movement of any pawn and without any capture. If the last move resulted in checkmate, that shall take precedence. 

Temporary Exceptions

At the beginning of the nineties, when it has been proven that some endgames can be won only in a larger number of moves, there has been an attempt to complicate the rule with a series of exceptions, all of which has been scraped later on.

See also

Publications

Forum Posts

1998 ...

2000 ...

2010 ...

2015 ...

External Links

References

Up one Level