Author: Stefan Dias
Date: 15:09:26 07/15/03
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On July 15, 2003 at 17:13:47, Andrea Griffini wrote: >A question about repeated positions... is the en-passant square >part of the "position" even when no en-passant pawn capture is >possible (because there is no capturing pawn, or because the >theoretically capturing pawn is pinned on the file or because >just the en-passant capture is "pinned") ? > >If this is not the case then checking for repeated positions >gets way more annoying as my position hash code doesn't tell >the whole story ... :( > >More concretely: > >8/8/8/8/1R4pk/8/5P2/5K2 w - - 0 1 > >1. f4 Kh3 2. Ra4 Kh4 3. Rb4 Kh3 4. Ra4 Kh4 5. Rb4 > >Is this "5. Rb4" drawing by third repetition of the position >occured on the board after "1. f4" or not ? > >Andrea Hi, After 1.f4 we have a position for the first time, after 3.Rb4, the same position for the second time after 4...Kh4 white can anounce his move 5.Rb4 and claim draw by third repetition after 5.Rb4, the same position for the third time, black could claim draw. Cheers.
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