Author: leonid
Date: 16:07:17 03/06/00
Go up one level in this thread
On March 06, 2000 at 18:14:30, Tom Kerrigan wrote: >On March 06, 2000 at 17:28:12, leonid wrote: > >>It was real fun. I thought that I spoke to the Heiner and was astounded when he >>said that putting the checking moves at the head of the line had no sense >>whatsoever. This is why I have asked before if you use in your mate solver my >>kind of alignment. > >I don't have a mate solver. > >>Mistake from my side that I have forgotten that in alpha-beta we see each ply >>two times. Exception only some positions that have only one response in the >>frist search. And if in each ply we see only around 2, 3 or 4 moves, your logic > >Alpha-beta does not visit positions twice. I don't know what you're talking >about when you say "we see each ply two times" and "first search." I only do one >search. (Unless you count iterative deepening.) Tom, don't use with me too sofisticated wording. It can be that "iterative deepening" correspond to my two line search. My logic see (if this is really good way to do so) first search where she find, as I said, moves from which final choice must be done later. Sometime it is only one move available, then no farther search is required. Very often, just in the middle of the game, number of the moves to choose later can go up to the 15 or 20. Here lost of time in second revision is considerable. And this is in shortening of this second revision that some speeding is possible. It is true also that final move could be found in one line search but in total it will make you lose a lot of extra time. All the difference will be in what is in my logic "maximum" that is in only one line search will be put to maximum all the time. In two line search this first "maximum" is not put automatically to the biggest maximum. >>metioned before. In more positions have the advantage of time but general time >>disadvantage. This is probably derive from the logic that checking moves must go > >You can't have the advantage and the disadvantage at the same time. You can. If you find the advantage in 10 position is equal to 10 seconds but in two bad positions you loose 20 seconds, here you have all this strange paradox. Alining of moves with the checking moves at the head give this strange and very big advantage from time to time. >>only around 2, 3 or 4 moves (very often just one move). Probably in order of >>reducing actual branching factor to more good one it must be done in second >>revision. There practically you must see what moves between the "good moves" is >>the best one. In this case some limitation of the moves seeing inside of the >>final revision could be done without putting that much the final result to big >>danger. > >I don't know what you mean by "second revision" or "final revision". Tom, for sure I must go and learn finally all this official wording with the reading of the theory in the same time. You indicated this need to me one more time. If you could rapidly say me how you look for the final move with the alpha-beta it will be also helpful. Maybe by reading your description I will find if the difference really exist. It is all the time possible. My logic was almost 100% came from my head. Sometime it is not enough. I still remember that when I read very rapidly some description of your game, with your help, I found that difference is simply amazing. I never expected that it could be so big. Leonid. >-Tom
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