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How to implement KPK ?
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Chan Rasjid



Joined: 09 Mar 2006
Posts: 567
Location: Singapore

PostPost subject: Re: How to implement KPK ?    Posted: Mon May 13, 2013 7:39 am Reply to topic Reply with quote

syzygy wrote:
Chan Rasjid wrote:
Finally, I am able to get my KPK routine to work just as 'perfectly' as how all other programs play the KPK endings. I am using the KPK bitbase which Gert Mueller put up in the public domain.

If you use a bitbase, why so much testing before you probe it?

Just probe it and if is a win, return a winning value that is a bit smaller than the value for K+Q versus K minus a value proportional to the distance of the pawn to promotion. If this does not work, don't hack your KPK routine further, but debug your search.


I think I understand what you mean.

Maybe it is just my natural instinct to harbour distrust - in the completeness of Gert Muller's bitbase Very Happy

There is indeed a further search bug - or rather a search issue. I have a parameter for root search to return when the pv repeats N times. It was set to 16 and it was insufficient. Setting it to 32 is ok. But then this repeat of pv at root is an issue I have not settled on. If I disable it, it may just search till depth 64 and I don't like it too much.

Rasjid.
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Display posts from previous:   
Subject Author Date/Time
How to implement KPK ? Chan Rasjid Thu Mar 21, 2013 3:43 am
      Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 7:46 am
            Re: How to implement KPK ? Chan Rasjid Thu Mar 21, 2013 8:27 am
                  Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 10:07 am
                        Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 10:33 am
                        Re: How to implement KPK ? Chan Rasjid Thu Mar 21, 2013 6:10 pm
                              Re: How to implement KPK ? Don Dailey Tue Apr 02, 2013 6:56 pm
            Re: How to implement KPK ? Lucas Braesch Thu Mar 21, 2013 11:03 am
                  Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 11:52 am
                        Re: How to implement KPK ? Lucas Braesch Thu Mar 21, 2013 12:04 pm
                        Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 6:36 pm
                              Re: How to implement KPK ? H.G.Muller Thu Mar 21, 2013 9:00 pm
                              Re: How to implement KPK ? Chan Rasjid Sat Mar 30, 2013 8:15 am
                                    Re: How to implement KPK ? Evert Glebbeek Sat Mar 30, 2013 8:42 am
                                          Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 12:12 pm
                                                Re: How to implement KPK ? Chan Rasjid Sat Mar 30, 2013 12:20 pm
                                                      Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 12:42 pm
                                                            Re: How to implement KPK ? Chan Rasjid Sat Mar 30, 2013 2:03 pm
                                                                  Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 6:29 pm
                                                      Re: How to implement KPK ? Wylie Garvin Sat Mar 30, 2013 12:50 pm
                                                            Re: How to implement KPK ? Chan Rasjid Sat Mar 30, 2013 1:53 pm
                                                Re: How to implement KPK ? Evert Glebbeek Sat Mar 30, 2013 2:03 pm
                                                      Re: How to implement KPK ? H.G.Muller Sat Mar 30, 2013 2:26 pm
                                                            Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 6:38 pm
                                                                  Re: How to implement KPK ? H.G.Muller Sat Mar 30, 2013 8:13 pm
                                                                        Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 8:58 pm
                                                                              Re: How to implement KPK ? H.G.Muller Sat Mar 30, 2013 10:58 pm
                                                                                    Re: How to implement KPK ? Sven Schüle Sat Mar 30, 2013 11:51 pm
                                                                                          Re: How to implement KPK ? H.G.Muller Sun Mar 31, 2013 7:35 am
                                                                                          Re: How to implement KPK ? Sven Schüle Sun Mar 31, 2013 9:02 am
                                                                                          Re: How to implement KPK ? H.G.Muller Sun Mar 31, 2013 9:09 am
                                                                                          Re: How to implement KPK ? Sven Schüle Sun Mar 31, 2013 9:13 am
                                                                                          Re: How to implement KPK ? Steven Edwards Mon May 13, 2013 2:14 am
                                                                                          Re: How to implement KPK ? Don Dailey Mon May 13, 2013 2:20 am
                                          Re: How to implement KPK ? Chan Rasjid Sat Mar 30, 2013 12:18 pm
                                    Re: How to implement KPK ? H.G.Muller Sat Mar 30, 2013 9:08 am
      Re: How to implement KPK ? Chan Rasjid Sun May 12, 2013 10:27 pm
            Re: How to implement KPK ? Ronald de Man Sun May 12, 2013 11:11 pm
                  Re: How to implement KPK ? Chan Rasjid Mon May 13, 2013 7:39 am
            Re: How to implement KPK ? Don Dailey Mon May 13, 2013 2:14 am
            Re: How to implement KPK ? Steven Edwards Tue May 14, 2013 7:19 am
                  Re: How to implement KPK ? Chan Rasjid Tue May 14, 2013 2:45 pm
                        Re: How to implement KPK ? Chan Rasjid Tue May 14, 2013 2:50 pm
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