Author: Robert Hyatt
Date: 12:33:47 07/20/99
Go up one level in this thread
On July 20, 1999 at 10:02:57, blass uri wrote: > >On July 20, 1999 at 03:33:18, Shep wrote: > >>On July 19, 1999 at 13:59:13, blass uri wrote: >> >>> >>>On July 19, 1999 at 11:42:57, Shep wrote: >>>>Indeed. Most programs have a maximum search depth somewhere between 30 and 45 >>>>ply (Hiarcs, MChess, Chessmaster, Chess Tiger, Junior, Fritz, Virtual etc.). >>> >>>I think that you are wrong about Junior and Fritz. >>>I think Junior can have bigger search depth then 45 >>> >>>Junior has another limit that the bigger search depth of it is not bigger than 4 >>>times the brute force search of it. >> >>In the aforementioned Albillo 01, Junior goes quickly to "depth=63" (or so) and >>then stops the search. Thus I concluded this is the max depth (and since we know >>that for Junior 'depth != ply', I suppose Junior's max depth is I may be jumping to conclusions. > >I know that depth=14 for Junior can be 27 or 28 plies in some lines. > >By the same logic depth 63 for Junior can be clearly more than 45 plies in some >lines. > >when I say bigger than 45 I mean to the selective depth of Junior and not to the >brute force of Junior. > the other point is that depth=16 is _not_ 16 plies in Junior. It is roughly equivalent to other programs going to depth=8. Because of the way it counts 'plies' by 'halfsies'. Just because you see depth=30 does not mean that is anywhere near the search result you would get if you used fritz to search to depth=30, because in fritz a ply is a ply. In junior a ply is 1/2 ply.. if you know what I mean... >The problem with hiarcs is that it cannot see more than 30 plies in the >selective depth(I do not expect programs to see more than 30 plies in the brute >force depth if the position is not a simple endgame). >> >>>I remember from looking at the selective search of Fritz that fritz can have >>>selective search depth of 50. >> >>IIRC the highest I saw was like 53 or 55, but never 60. >>So no "mate in 30" to be expected from Fritz... > >I did not say that it can see 60 plies but only that it can see more than 45 >plies. > >Uri
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