Author: Robert Hyatt
Date: 13:19:00 11/21/02
Go up one level in this thread
On November 21, 2002 at 05:14:53, Alessandro Damiani wrote: >On November 20, 2002 at 18:59:59, Uri Blass wrote: > >>On November 20, 2002 at 17:51:40, Alessandro Damiani wrote: >> >>>> >>>>One final remark: You use standard R = 3 in DIEP. So the search tree constructed >>>>by your program will definitely be smaller than that of verified R = 3. Many >>>>people find standard R = 3 as too risky; but if you are happy with its overall >>>>tactical strength, then I don't recommend you to shift to another method. But >>>>for those who'd like to get greater tactical strength than standard R = 2, and a >>>>smaller search tree than R = 2, I recommend to try verified null-move pruning. >>>> >>>>Best, >>>> >>>>Omid. >>>> >>> >>>Vincent uses R = 3 and complex quiescence search (Vincent, correct me if I am >>>wrong). Maybe your Verified Null-Move gives about the same results like R = 3 >>>with a complex quiescence search. >>> >>>_If_ this is true then your approach is simpler and therefore better. Just my >>>two thoughts before going to bed. Good nights....... >>> >>>Alessandro >> >>I do not believe that it gives the same results. > >I wrote "about the same result" which is not equal to "the same result". And I >added "maybe". These words tells you that I am just guessing, nothing more, >nothing less. > > >>I do not know which algorithm is better but the >>algorithms are different. >> > >Right, to know and to guess are two different things. I am in the guess-phase. >;) > > >>I believe that a third algorithm may be better than both of them. >> > >BTW I won't use it. My preferred algorithm is Alpha Beta Conspiracy Search >(ABC), and ABC already contains Verified Null-Move in a different way. > >BTW Verified Null-Move looks like an improvement of Fail High Reductions by the >authors of Zugzwang. > >Alessandro If you mean because while verifying at one node you don't verify anywhere deeper I agree. I tried the FHR and threw it out as too expensive when it first surfaced several years ago. This approach bears some testing however... Unfortunately I have not yet made any progress. Been busy writing justifications for the new ftp server to house all of Eugene's 6-piece EGTB stuff. :)
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