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When does a cut-node became an all-node?
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Vincent Diepeveen



Joined: 09 Mar 2006
Posts: 1738
Location: The Netherlands
PostPost subject: Re: When does a cut-node became an all-node?    Posted: Tue Mar 27, 2012 12:37 pm Reply to topic Reply with quote
sedicla wrote:
According to chess wiki programming is when after all candidate moves are tried, but fruit does it after first move is tried.

I thinking of trying doing things differently according node type, for example:
cut-node - use static null move (like stockfish) and don't do razoring (eval + margin < beta).
all-node - no static null move, try razor, no ordering for quiet moves...

What you guys think is a good time to switch a cut-node to all-node?

Thanks.


When all moves of a position P are <= alfa, then the node is an all node; if you get a score above beta, then it's a cutnode.

In 2005 i tried some experiments with reductions based upon guessing whether node is cutnode or not, but didn't work. If you prune or reduce, better prune/reduce everything instead of have some slip through because of burocratic reason.
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Subject Author Date/Time
When does a cut-node became an all-node? Alcides Schulz Tue Mar 27, 2012 11:55 am
      Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 12:37 pm
      Re: When does a cut-node became an all-node? Lucas Braesch Tue Mar 27, 2012 1:03 pm
            Re: When does a cut-node became an all-node? Edmund Moshammer Tue Mar 27, 2012 1:24 pm
                  Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 4:52 pm
            Re: When does a cut-node became an all-node? Thomas Petzke Tue Mar 27, 2012 1:28 pm
      Re: When does a cut-node became an all-node? Larry Kaufman Tue Mar 27, 2012 1:46 pm
            Re: When does a cut-node became an all-node? Alcides Schulz Tue Mar 27, 2012 2:03 pm
            Re: When does a cut-node became an all-node? Thomas Petzke Tue Mar 27, 2012 2:42 pm
            Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 5:11 pm
                  Re: When does a cut-node became an all-node? Larry Kaufman Tue Mar 27, 2012 6:15 pm
                        Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 6:22 pm
                              Re: When does a cut-node became an all-node? Larry Kaufman Tue Mar 27, 2012 6:31 pm
                                    Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 6:43 pm
                                          Re: When does a cut-node became an all-node? Larry Kaufman Tue Mar 27, 2012 7:17 pm
                                                Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 8:00 am
                                                      Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 2:08 pm
                                                            Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 5:07 pm
                                                                  Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 5:55 pm
                                                                        Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 8:33 pm
                                                                              Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 9:16 pm
                                                                                    Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 9:37 pm
                                                                                          Re: When does a cut-node became an all-node? Ed Schroder Thu Mar 29, 2012 3:22 pm
                                                                        Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 8:56 pm
                                                                              Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 9:26 pm
                                                                                    Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 9:59 pm
                                                                                          Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 10:02 pm
                                                                                          Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 10:46 pm
                                                      Re: When does a cut-node became an all-node? Ricardo Barreira Wed Mar 28, 2012 8:57 pm
                                                            Re: When does a cut-node became an all-node? Vincent Diepeveen Wed Mar 28, 2012 9:22 pm
                                                                  Re: When does a cut-node became an all-node? Ricardo Barreira Thu Mar 29, 2012 9:38 am
                                                                        Re: When does a cut-node became an all-node? Vincent Diepeveen Thu Mar 29, 2012 9:45 am
                              Re: When does a cut-node became an all-node? Marco Costalba Tue Mar 27, 2012 6:37 pm
            Re: When does a cut-node became an all-node? Robert Hyatt Tue Mar 27, 2012 5:19 pm
                  Re: When does a cut-node became an all-node? Vincent Diepeveen Tue Mar 27, 2012 5:35 pm
            Re: When does a cut-node became an all-node? Steve Maughan Tue Mar 27, 2012 5:59 pm
      Re: When does a cut-node became an all-node? Robert Hyatt Tue Mar 27, 2012 5:12 pm
            Re: When does a cut-node became an all-node? Alcides Schulz Tue Mar 27, 2012 5:41 pm
                  Re: When does a cut-node became an all-node? Robert Hyatt Wed Mar 28, 2012 10:01 pm
                        Re: When does a cut-node became an all-node? Larry Kaufman Wed Mar 28, 2012 10:31 pm
                              Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 12:28 am
                                    Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 1:51 am
                                          Re: When does a cut-node became an all-node? Sam Hamilton Thu Mar 29, 2012 2:05 am
                                                Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 2:37 am
                                                      Re: When does a cut-node became an all-node? Sam Hamilton Thu Mar 29, 2012 2:56 am
                                                Re: When does a cut-node became an all-node? Vincent Diepeveen Thu Mar 29, 2012 9:36 am
                                                      Re: When does a cut-node became an all-node? Ed Schroder Thu Mar 29, 2012 4:01 pm
                                          Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 10:53 am
                                                Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 2:24 pm
                                                      Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 4:04 pm
                                                            Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 4:27 pm
                                                                  Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 5:49 pm
                                                                        Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 7:18 pm
                                                            Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 4:28 pm
                                                                  Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 4:52 pm
                                                                        Re: When does a cut-node became an all-node? Larry Kaufman Thu Mar 29, 2012 5:58 pm
                                                                              Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 7:13 pm
                                                                                    Re: When does a cut-node became an all-node? Karlo Bala Jr. Thu Mar 29, 2012 8:39 pm
                                                                                          Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 9:02 pm
                                                                                          Re: When does a cut-node became an all-node? Karlo Bala Jr. Thu Mar 29, 2012 9:23 pm
                                                                                          Re: When does a cut-node became an all-node? Daniel Shawul Thu Mar 29, 2012 9:45 pm
                                                                                          Re: When does a cut-node became an all-node? Vincent Diepeveen Fri Mar 30, 2012 12:26 am
                              Re: When does a cut-node became an all-node? Robert Hyatt Thu Mar 29, 2012 8:34 pm
                        Re: When does a cut-node became an all-node? Alcides Schulz Thu Mar 29, 2012 3:05 am
                        Re: When does a cut-node became an all-node? Thomas Petzke Thu Mar 29, 2012 6:53 am
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