Author: Bob Durrett
Date: 15:12:00 11/30/03
Go up one level in this thread
On November 30, 2003 at 17:44:33, Gerd Isenberg wrote: >On November 30, 2003 at 17:36:10, Gerd Isenberg wrote: > >>On November 30, 2003 at 17:19:54, Georg v. Zimmermann wrote: >> >>>On November 30, 2003 at 17:18:19, Georg v. Zimmermann wrote: >>> >>>[d]8/8/8/8/3R1p1k/8/4P3/6K1 w - - 0 1 >>> >>>Better i hope .. >>> >>>> >>>>white moves pawn, black can not capture en passant. wonderfull, breaks my new >>>>move generator. >>>> >>>>Uri, I think you are the expert on this. Ideas for workarounds ? :-) >>>> >>>>But the main reason I am posting is: are there any other situations like the >>>>above where I can with one move move 2 pieces out of the way of an x-ray attack >>>>? >> >>No, only ep. >>The conditions to deny ep capture generation are (iirr): >> >1.) The black pawn was pinned on the 4. rank before the white pawn push occured. >2.) The black pawn is pinned on the file. >3.) The black pawn is pinned on the other diagonal, > the pawn intends to use for ep-capture. >4.) Discoverd check by the white pawn of course. > >Gerd >> >> >> >>>> >>>>Georg The rule I would follow is: "You cannot play a move which puts your own king into check." I hope that was built into all chess engines. Bob D.
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