ChessUSA.com TalkChess.com
Hosted by Your Move Chess & Games
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

optimal aspiration window for stockfish question
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: Programming and Technical Discussions Flat
View previous topic :: View next topic  
Author Message
Robert Hyatt



Joined: 27 Feb 2006
Posts: 15819
Location: Birmingham, AL
PostPost subject: Re: optimal aspiration window for stockfish question    Posted: Thu Mar 15, 2012 9:49 pm Reply to topic Reply with quote
Karlo Bala wrote:
Uri Blass wrote:
Houdini wrote:

Uri Blass wrote:
The more interesting question is which houdini does not use that formula because there are more than one houdini version.

If you're really interested, no version of Houdini has used the formulae that Marco quoted above.
Houdini uses an aspiration window that widens much faster.

Robert


Thanks Robert.

My intuition also tells me that it is better to have less researches(increasing delta faster by a different formula may be a way to do it)



My intuition is somewhat different than yours. If your PV search is very similar to non-PV search, it should be a small percentage of false PV nodes, so that you can use a wider window. If your PV search is very differen from non-PV search (which is common today because of the LMR, NM, futility, delta, etc.) then it should be more false PV nodes. In that case you do not want to search a lot of false PV nodes with a wide window.


LMR and such does not necessarily mean PV and non-PV searches are different. I'm not convinced they should be different, myself..
Back to top
View user's profile Send private message
Display posts from previous:   
Subject Author Date/Time
optimal aspiration window for stockfish question Uri Blass Mon Mar 12, 2012 11:14 am
      Re: optimal aspiration window for stockfish question Ed Schroder Mon Mar 12, 2012 12:55 pm
            Re: optimal aspiration window for stockfish question Marco Costalba Mon Mar 12, 2012 6:47 pm
                  Re: optimal aspiration window for stockfish question Don Dailey Mon Mar 12, 2012 9:41 pm
                        Re: optimal aspiration window for stockfish question Robert Hyatt Wed Mar 14, 2012 10:18 pm
                              Re: optimal aspiration window for stockfish question Marco Costalba Thu Mar 15, 2012 6:15 am
                                    Re: optimal aspiration window for stockfish question Robert Hyatt Thu Mar 15, 2012 2:06 pm
                                          Re: optimal aspiration window for stockfish question Robert Hyatt Thu Mar 15, 2012 5:30 pm
                                                Re: optimal aspiration window for stockfish question Robert Hyatt Thu Mar 15, 2012 8:11 pm
                                                      Re: optimal aspiration window for stockfish question (update Robert Hyatt Thu Mar 15, 2012 9:55 pm
                                                            Re: optimal aspiration window for stockfish question (update Miguel A. Ballicora Thu Mar 15, 2012 10:23 pm
                                                                  Re: optimal aspiration window for stockfish question (update Robert Hyatt Fri Mar 16, 2012 3:29 am
                                                                        Re: test results Robert Hyatt Fri Mar 16, 2012 3:41 am
                                                                              Re: test results Rémi Coulom Fri Mar 16, 2012 8:38 am
                                                                                    Re: test results Robert Hyatt Fri Mar 16, 2012 5:20 pm
                                                                              Re: test results Karlo Bala Jr. Fri Mar 16, 2012 11:30 am
                                                                                    Re: test results Robert Hyatt Fri Mar 16, 2012 5:26 pm
                                                                                          Re: test results Ed Schroder Fri Mar 16, 2012 6:31 pm
                                                                                          Re: test results Robert Hyatt Fri Mar 16, 2012 7:16 pm
                                          Re: optimal aspiration window for stockfish question Vincent Diepeveen Sat Mar 17, 2012 1:44 pm
                                                Re: optimal aspiration window for stockfish question Robert Hyatt Sat Mar 17, 2012 4:11 pm
                                                      Re: optimal aspiration window for stockfish question Marco Costalba Sat Mar 17, 2012 5:28 pm
                                                            Re: optimal aspiration window for stockfish question Robert Hyatt Sun Mar 18, 2012 3:28 am
                                                                  Re: optimal aspiration window for stockfish question Lucas Braesch Sun Mar 18, 2012 5:55 am
                                                                        Re: optimal aspiration window for stockfish question Joona Kiiski Sun Mar 18, 2012 9:02 am
                  Re: optimal aspiration window for stockfish question Robert Houdart Mon Mar 12, 2012 10:44 pm
                        Re: optimal aspiration window for stockfish question Robert Houdart Tue Mar 13, 2012 9:18 am
                              Re: optimal aspiration window for stockfish question Uri Blass Tue Mar 13, 2012 10:12 am
                                    Re: optimal aspiration window for stockfish question Karlo Bala Jr. Wed Mar 14, 2012 7:46 pm
                                          Re: optimal aspiration window for stockfish question Robert Hyatt Thu Mar 15, 2012 9:49 pm
                  Re: optimal aspiration window for stockfish question Lucas Braesch Wed Mar 14, 2012 4:10 pm
                        Re: optimal aspiration window for stockfish question Eelco de Groot Wed Mar 14, 2012 7:30 pm
                              Re: optimal aspiration window for stockfish question Lucas Braesch Thu Mar 15, 2012 2:03 am
                                    Re: optimal aspiration window for stockfish question Marco Costalba Thu Mar 15, 2012 6:13 am
      Re: optimal aspiration window for stockfish question Eelco de Groot Tue Mar 13, 2012 10:20 am
            Re: optimal aspiration window for stockfish question Uri Blass Tue Mar 13, 2012 12:57 pm
Post new topic    TalkChess.com Forum Index -> Computer Chess Club: Programming and Technical Discussions

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Powered by phpBB © 2001, 2005 phpBB Group
Enhanced with Moby Threads