bugAx - Bugs: bug #22608, bug in three fold repetition (3FR)...

 
 

bug #22608: bug in three fold repetition (3FR) logic

Submitted by:  Azhar Ali <azhar>
Submitted on:  Sat 15 Mar 2008 05:43:41 PM UTC  
 
Category: bugSeverity: 3 - Normal
Item Group: NoneStatus: Fixed
Privacy: PublicAssigned to: Azhar Ali <azhar>
Open/Closed: Closed

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Tue 10 Mar 2009 02:18:03 PM UTC, comment #1:

this was long fixed, I think forgot to close this thread

Azhar Ali <azhar>
Project AdministratorIn charge of this item.
Sat 15 Mar 2008 05:43:41 PM UTC, original submission:

The present Ax's 3FR logic doesn't agree to the following:

"The relevant rule in the FIDE laws of chess is 9.2, which reads:

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 sequential repetition of moves)

a. 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

b. 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 [considered to be] the same if a pawn that could have been captured en passant can no longer be captured or if the right to castle has been changed. (FIDE 2005, Article 9.2)

While the rule does not require that the position occur thrice on nearly consecutive moves, it happens this way very often in practice, typically with one of the kings being put into perpetual check. The intermediate positions and moves don't matter – they can be the same or different. The rule applies to positions, not moves."

Azhar Ali <azhar>
Project AdministratorIn charge of this item.

 

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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Tue 10 Mar 2009 02:18:03 PM UTCazharStatusIn Progress=>Fixed
      Open/ClosedOpen=>Closed

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