Author: Dieter Buerssner
Date: 12:32:59 04/05/03
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On April 05, 2003 at 14:02:09, Russell Reagan wrote: >You should only hash the en passant square if it is possible for an enemy pawn >to execute the en passant capture. This means, ideally, that if there is a pawn >present to make the capture, but it is pinned and cannot legally make the >capture, that you should not hash the en passant square. Is this correct? Correct, but not practically important. The pinned case will practically never happen. I checked this (inside the search, and by looking through a database of - I believe - 2.8 million games. It never happened ...) If it would happen, I think the consequences are not very critical anyway. >4k3/8/8/8/2b5/8/2PP4/4K2R w > >Notice that the white king cannot castle since the black bishop attacks f1. If >this position arose 3 times, but with differing castling rights, then that is >NOT a draw by repetition. Correct? This is also my understanding of the rules. >In short, the rules are... I agree with your rules. Regards, Dieter
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