Author: José Carlos
Date: 06:27:43 07/12/02
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On July 12, 2002 at 09:19:10, Richard Pijl wrote: ><snipped irrelevant part> > >>>>>- Game history should be counted, but make sure you do not evaluate repetitions >>>>>in the rootnode as you need a move to be played ... >>>> >>>> Not if your opponent has made a move such that there's a 3 times repeated >>>>position on the board. In that case, you can simply claim the draw. >>>> >>>Not by FIDE rules where you have to state a move you want to play which results >>>in the third time the position occurred. E.g. when from the startposition white >>>moves its kings knight to f3 and back, and black does the same with its knight >>>(g8-f6 and back) black can claim a draw before making its fourth move stating >>>the intention to play f6-g8. If black doesn't, white can by stating the move >>>g1-f3. However, if white had played the sequence 1.Nf3 2.Ng1 3.Nc3 4.Nb1 it >>>cannot claim a draw on any move as on either Nc3 or Nf3 the position only >>>occurred twice. >> >> I play white, you play black. The game goes: 1. Nf3 Nf6 2. Ng1 Ng8 3. Nf3 Nf6 >>4. Ng1 Ng8 5. Nf3 Nf6 6. Ng1 Ng8 7. Nf3 Nf6 ... It's perfectly legal because 3rd >>repetition must be claimed by the players. In this game, either you or me can >>claim draw by third repetition whenever we want, with or without making a move, >>because there have been some positions (4 in this case) repeated 3 or more >>times. >> I'm 100% sure about this point. >> >You're right. Either something changed in the rules over time or my memory is >failing me ;-). From the FIDE rules: > >'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 (no 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 appeard, 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 be captured or if the right to castle has been changed temporarily >or permanently.' > >(From FIDE Laws of Chess, in force since July 1st 2001) > >Richard Thanks for the info. Luckily I don't have a bug in third repetition then :) José C.
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