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SEE on non-capture moves in main search
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Tord Romstad



Joined: 08 Mar 2006
Posts: 1750
Location: Oslo, Norway
PostPost subject: Re: SEE on non-capture moves in main search    Posted: Fri Mar 30, 2007 10:00 pm Reply to topic Reply with quote
[quote="bob"]
Tord Romstad wrote:
bob wrote:
Quote:
If so, losing captures before non-captures would make sense. Otherwise, to me, it does not at all.


Why? Keep in mind that we are only talking about moves with negative SEE value here. As an example, consider the following position fragment:
[D]8/6p1/7b/7R/8/8/8/8 w - -
   ::    ::    ::    ::
::    ::    ::    BP    
   ::    ::    ::    BB
::    ::    ::    :: WR
   ::    ::    ::    ::
::    ::    ::    ::    
   ::    ::    ::    ::
::    ::    ::    ::    

Why should Rg5 be searched before Rxh6? Wouldn't you expect the second move to have a much higher probability of being the best move? Still, my tests indicate that searching the losing captures after the losing non-capture performs slightly better. I wish I understood why...


It shouldn't. But why should Rxh6 be searched _before_ all the _safe_ rook moves that exist as well?

I never said it should. Again, I am only talking about the sorting of moves with negative SEE value here, not about moves with zero SEE value (which includes all safe rook moves). When all captures and non-captures with non-negative SEE value have been searched, which moves should we search first? Losing captures or losing non-captures? My experience is that either searching losing non-captures before losing captures perform better. To me, this is hard to understand.

Tord
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Subject Author Date/Time
SEE on non-capture moves in main search Gary Wed Mar 28, 2007 11:25 pm
      Re: SEE on non-capture moves in main search Robert Hyatt Thu Mar 29, 2007 1:17 am
            Re: SEE on non-capture moves in main search Tord Romstad Thu Mar 29, 2007 10:03 am
                  Re: SEE on non-capture moves in main search ed Thu Mar 29, 2007 1:34 pm
                        Re: SEE on non-capture moves in main search Sam Hamilton Fri Mar 30, 2007 12:07 am
                        Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 11:46 am
                  Re: SEE on non-capture moves in main search Robert Hyatt Thu Mar 29, 2007 9:35 pm
                        Re: SEE on non-capture moves in main search H.G.Muller Thu Mar 29, 2007 10:27 pm
                              Re: SEE on non-capture moves in main search Robert Hyatt Fri Mar 30, 2007 12:05 am
                                    Re: SEE on non-capture moves in main search H.G.Muller Fri Mar 30, 2007 6:50 am
                                          Re: SEE on non-capture moves in main search Robert Hyatt Fri Mar 30, 2007 9:27 pm
                                                Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 10:29 pm
                                                      Re: SEE on non-capture moves in main search Robert Hyatt Sun Apr 01, 2007 1:51 am
                                                            Re: SEE on non-capture moves in main search Tord Romstad Sun Apr 01, 2007 7:54 am
                                                                  Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 1:57 am
                                                            Re: SEE on non-capture moves in main search H.G.Muller Sun Apr 01, 2007 10:22 am
                                                                  Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 2:05 am
                                                                        Re: SEE on non-capture moves in main search H.G.Muller Mon Apr 02, 2007 12:31 pm
                                                                              Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 3:56 pm
                                                                                    Re: SEE on non-capture moves in main search Steven Edwards Mon Apr 02, 2007 4:44 pm
                                                                                          Re: SEE on non-capture moves in main search H.G.Muller Mon Apr 02, 2007 4:59 pm
                                                                                          Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 6:44 pm
                                                                                          Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 6:40 pm
                                                                                    Re: SEE on non-capture moves in main search H.G.Muller Mon Apr 02, 2007 4:53 pm
                                                Re: SEE on non-capture moves in main search H.G.Muller Sat Mar 31, 2007 8:38 am
                                                      Re: SEE on non-capture moves in main search Robert Hyatt Sun Apr 01, 2007 1:59 am
                                                            Re: SEE on non-capture moves in main search Tord Romstad Sun Apr 01, 2007 7:58 am
                                                                  Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 3:57 pm
                                                                  Re: SEE on non-capture moves in main search Peter Fendrich Mon Apr 02, 2007 5:19 pm
                                                                        Re: SEE on non-capture moves in main search Robert Hyatt Mon Apr 02, 2007 6:46 pm
                                                                        Re: SEE on non-capture moves in main search Tord Romstad Mon Apr 02, 2007 6:51 pm
                                                                              Re: SEE on non-capture moves in main search Peter Fendrich Mon Apr 02, 2007 7:53 pm
                                                                                    Re: SEE on non-capture moves in main search H.G.Muller Mon Apr 02, 2007 9:01 pm
                                                                                          Re: SEE on non-capture moves in main search Peter Fendrich Mon Apr 02, 2007 9:30 pm
                                                                                          Re: SEE on non-capture moves in main search H.G.Muller Tue Apr 03, 2007 8:46 am
                                                                                          Re: SEE on non-capture moves in main search Peter Fendrich Tue Apr 03, 2007 10:29 am
                                                                                          Re: SEE on non-capture moves in main search Robert Hyatt Tue Apr 03, 2007 9:23 pm
                                                                                          Re: SEE on non-capture moves in main search Tord Romstad Wed Apr 04, 2007 2:38 pm
                                                                                          Re: SEE on non-capture moves in main search Peter Fendrich Wed Apr 04, 2007 7:49 pm
                                                                                          Re: SEE on non-capture moves in main search Tony Tue Apr 03, 2007 10:54 am
                                                                                          Re: SEE on non-capture moves in main search Robert Hyatt Tue Apr 03, 2007 9:24 pm
                                                                                          Re: SEE on non-capture moves in main search H.G.Muller Tue Apr 03, 2007 9:29 pm
                                    Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 11:40 am
                              Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 11:54 am
                                    Re: SEE on non-capture moves in main search H.G.Muller Fri Mar 30, 2007 1:28 pm
                                          Re: SEE on non-capture moves in main search H.G.Muller Fri Mar 30, 2007 4:41 pm
                        Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 11:30 am
                              Re: SEE on non-capture moves in main search Uri Blass Fri Mar 30, 2007 11:50 am
                                    Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 10:32 pm
                              Re: SEE on non-capture moves in main search H.G.Muller Fri Mar 30, 2007 12:16 pm
                              Re: SEE on non-capture moves in main search Robert Hyatt Fri Mar 30, 2007 9:32 pm
                                    Re: SEE on non-capture moves in main search Tord Romstad Fri Mar 30, 2007 10:00 pm
      Re: SEE on non-capture moves in main search Mark Lefler Thu Mar 29, 2007 6:30 am
      Re: SEE on non-capture moves in main search H.G.Muller Thu Mar 29, 2007 9:28 am
            Re: SEE on non-capture moves in main search Tord Romstad Thu Mar 29, 2007 10:13 am
                  Re: SEE on non-capture moves in main search H.G.Muller Thu Mar 29, 2007 12:03 pm
                        Re: SEE on non-capture moves in main search Tord Romstad Thu Mar 29, 2007 12:39 pm
                              Re: SEE on non-capture moves in main search H.G.Muller Thu Mar 29, 2007 2:15 pm
                                    Re: SEE on non-capture moves in main search Zach Wegner Thu Mar 29, 2007 9:10 pm
                  Re: SEE on non-capture moves in main search Steven Edwards Thu Mar 29, 2007 2:18 pm
                  Re: SEE on non-capture moves in main search Rob Sun Apr 01, 2007 6:01 pm
      Re: SEE on non-capture moves in main search Gary Sun Apr 01, 2007 8:26 am
      Re: SEE on non-capture moves in main search Markoff Thu Apr 05, 2007 11:25 pm
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