Author: blass uri
Date: 07:34:56 02/23/00
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On February 23, 2000 at 10:22:04, Randy Schmidt wrote: >I have always been troubled by the fact that Junior does not display ply depth >in the same manner as every other program out there! When you run J6a in it's >own interface or in Fritz6s' instead of seeing 9/21 in the play depth and 2/35 >in the move being considered, you see depth = 20 . > >9/21 means that a program is to 9 ply in the main search, and in some lines has >gone to ply=21. > >2/35 means that the program is now considering (at depth=9), the second of 35 >possible moves in the given position. > >depth=20 as much as I can tell means very little at all. I had asked this >question about J5 a long time ago, and Amir said that if you divide by 2, >you get the actual depth. I can tell you that it is very doubtful that this is >the case, and I have run dozens and dozens of examples. My own opinion is that >you should multiply the depth by 2/3. If you divide by 2 you get the minimal depth that Junior looks in every line(except some rare cases when Junior cannot see simple tactics) The practical depth for the important lines is usually more than the minimal depth. If you multiply by 2 you get the maximal depth that Junior looks in every line > >I guess I have 2 questions. What DOES depth mean in J6 and why is it not the >case that J6 does not follow every other program out there? The reason that it is not the case that Junior follow every other program is that Junior is a different program. Why do you assume that all the programs must be the same? I think that following other programs is a mistake if you want your program to be better than other programs. I never accept the >analysis of a computer move that is not at ply=9, second choice. With Junior >you never know when you are there. When preparing openings, I cannot use Junior >for that reason. ( I use CAP now ) Thanks Dann Corbit! I think that you are wrong because ply=9 of Fritz is not the same as ply=9 of hiarcs. You can trust more the analysis of hiarcs at 9 plies. I think that it is better to use fixed time for analysis and not fixed depth because some programs do more extension than other programs. Uri
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