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Programmer bug hunt challenge
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Robert Hyatt



Joined: 27 Feb 2006
Posts: 17577
Location: Birmingham, AL

PostPost subject: Re: Programmer bug hunt challenge    Posted: Fri May 04, 2007 8:22 pm Reply to topic Reply with quote

steffan wrote:
hgm wrote:
Well, as the e.p. square here is only used to decide if the following move is legal, and not for determining if positions are different for hashing or applying the 3-rep rule, it is not a bug to consider that e.p. rights exist when no Pawn is present to enjoy these rights...

Yes, precisely. Note it is also necessary to remember the en passant square for the purpose of writing FEN strings, even if there is no pawn present to effect the en passant capture. See last paragraph section 16.1.7 of the PGN specificiation :
Quote:
An en passant target square is given if and only if the last move was a pawn advance of two squares. Therefore, an en passant target square field may have a square name even if there is no pawn of the opposing side that may immediately execute the en passant capture.


Yes, that has been one flaw in the FEN specification that should have been changed as it makes absolutely no sense.
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Subject Author Date/Time
Programmer bug hunt challenge ed Fri May 04, 2007 9:26 am
      Re: Programmer bug hunt challenge Reinhard Scharnagl Fri May 04, 2007 10:09 am
      Re: Programmer bug hunt challenge Rob Fri May 04, 2007 10:31 am
            Re: Programmer bug hunt challenge Tony Fri May 04, 2007 10:49 am
                  Re: Programmer bug hunt challenge Tony Fri May 04, 2007 10:55 am
                  Re: Programmer bug hunt challenge Rob Fri May 04, 2007 11:25 am
                        Re: Programmer bug hunt challenge Tony Fri May 04, 2007 12:02 pm
            Re: Programmer bug hunt challenge Reinhard Scharnagl Fri May 04, 2007 12:01 pm
            Re: Programmer bug hunt challenge ed Fri May 04, 2007 1:51 pm
                  Re: Programmer bug hunt challenge Uri Blass Fri May 04, 2007 4:46 pm
                        Re: Programmer bug hunt challenge H.G.Muller Fri May 04, 2007 4:54 pm
                              Re: Programmer bug hunt challenge Stan Arts Fri May 04, 2007 5:27 pm
                              Re: Programmer bug hunt challenge Steffan Westcott Fri May 04, 2007 7:24 pm
                                    Re: Programmer bug hunt challenge Robert Hyatt Fri May 04, 2007 8:22 pm
                                          Re: Programmer bug hunt challenge Steven Edwards Sat May 05, 2007 12:28 am
                                                Re: Programmer bug hunt challenge Dann Corbit Sat May 05, 2007 1:36 am
                                                      Re: Programmer bug hunt challenge mambofish Sat May 05, 2007 11:11 am
                                                            Re: Programmer bug hunt challenge Steven Edwards Sat May 05, 2007 11:13 am
                                                      Re: Programmer bug hunt challenge mambofish Sat May 05, 2007 11:15 am
                                                            Re: Programmer bug hunt challenge Robert Hyatt Mon May 07, 2007 10:58 pm
                                                      Re: Programmer bug hunt challenge Steffan Westcott Sat May 05, 2007 11:17 am
                                                            Re: Programmer bug hunt challenge Robert Hyatt Tue May 08, 2007 12:41 am
                                                                  Re: Programmer bug hunt challenge H.G.Muller Tue May 08, 2007 12:11 pm
                                                                        Re: Programmer bug hunt challenge Robert Hyatt Tue May 08, 2007 4:35 pm
                                                                              Re: Programmer bug hunt challenge H.G.Muller Tue May 08, 2007 4:50 pm
                                                                                    Re: Programmer bug hunt challenge Robert Hyatt Tue May 08, 2007 5:42 pm
                                                                                          Re: Programmer bug hunt challenge H.G.Muller Tue May 08, 2007 7:26 pm
                                                                                          Re: Programmer bug hunt challenge H.G.Muller Tue May 08, 2007 7:26 pm
                              Re: Programmer bug hunt challenge Robert Hyatt Fri May 04, 2007 8:20 pm
                        Re: Programmer bug hunt challenge Robert Hyatt Fri May 04, 2007 8:19 pm
                  Re: Programmer bug hunt challenge Peter Fendrich Fri May 04, 2007 5:34 pm
      Re: Programmer bug hunt challenge Steven Edwards Wed May 09, 2007 11:14 am
            Re: Programmer bug hunt challenge NKOTB Wed May 09, 2007 11:53 am
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