Author: Richard Pijl
Date: 06:19:10 07/12/02
Go up one level in this thread
<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
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