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Syzygy probing code: DTZ in some cursed endgames off by one?
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Michel Van den Bergh



Joined: 28 Sep 2008
Posts: 1849

PostPost subject: Re: Syzygy probing code: DTZ in some cursed endgames off by    Posted: Wed Sep 13, 2017 2:15 pm Reply to topic Reply with quote

syzygy wrote:
The short answer: the moves come in pairs: winning, losing. Moves by the losing side are always optimal (or worse!). So the engine is guaranteed to get DTZ/2 lower by at least 1 on each move (2 ply).

This is not a fully developed argument but it can be made to work. I might work out the full proof later.


Ok! This I had also worked out. But this seems to require a 2-ply search to make it work. Is that correct?
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Subject Author Date/Time
Syzygy probing code: DTZ in some cursed endgames off by one? Niklas Fiekas Sun Dec 06, 2015 12:31 am
      Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Sun Dec 06, 2015 1:04 am
            Re: Syzygy probing code: DTZ in some cursed endgames off by Niklas Fiekas Sun Dec 06, 2015 1:30 am
            Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 1:33 pm
                  Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 2:09 pm
                        Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 2:15 pm
                              Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 2:59 pm
                                    Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 3:10 pm
                                    Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 3:13 pm
                                          Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 3:36 pm
                                                Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 3:53 pm
                                                      Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 4:24 pm
                                                            Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 4:48 pm
                                                                  Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 6:48 pm
                                                                        Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 7:18 pm
                                                                              Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 7:32 pm
                                                                                    Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 8:27 pm
                                                                                          Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 8:43 pm
                                                                                          Re: Syzygy probing code: DTZ in some cursed endgames off by Ronald de Man Wed Sep 13, 2017 9:07 pm
                                                                              Re: Syzygy probing code: DTZ in some cursed endgames off by Marco Costalba Wed Sep 13, 2017 7:52 pm
                                                                                    Re: Syzygy probing code: DTZ in some cursed endgames off by Michel Van den Bergh Wed Sep 13, 2017 7:58 pm
      Re: Syzygy probing code: DTZ in some cursed endgames off by Joshua Shriver Fri Dec 11, 2015 4:27 pm
            Re: Syzygy probing code: DTZ in some cursed endgames off by H.G.Muller Fri Dec 11, 2015 4:55 pm
                  Re: Syzygy probing code: DTZ in some cursed endgames off by Joshua Shriver Fri Dec 11, 2015 5:03 pm
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