Author: Roy Brunjes
Date: 06:42:43 02/21/00
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On February 20, 2000 at 16:37:25, blass uri wrote: >On February 20, 2000 at 15:05:23, Frank Müller wrote: > >>Junior 6 engine offers several parameters, most of them are self-explaining. >>However, meaning of "insufficient material" and "threshold" with a default value >>of -9999 are not clear to me. I couldn't find an explanation in Junior's online >>manual, which moreover refers to some parameters which actually do not exist, >>for example "aggressiveness" (should be set from -2 to +2) and "selectivity" >>(online manual tolds me that Junior 6 is a member of the null move algorithm >>family. Well, I'm not sure, but I heard in this forum that this shall not be the >>case...). >>Thanks for your help. >> >>Greetings >>Frank > >I do not have Junior6 but I know these parameters from Junior5. > >insufficient material gives Junior knowledge about some draws endgames(for >example it assumes that king and knight with no more material cannot win) >Junior can save time in practical games by not searching positions that it knows >that they are not more than a draw. > >This knowledge may be counterproductive in some studies and if you tell it >insufficient material off then it does not use this knowledge and can find the >right move in these studies. > >threshold is for analysis >If you are interrested only in moves with score at least 1 pawn for yourself >you can use threshold=100 > >Junior is not a null mover. > > >I think that you have fritz's manual and not Junior's manual because selectivity >and aggressiveness are parameters of Fritz. No, the Junior 6 online manual does indeed talk (incorrectly) about these things. I think ChessBase messed up on this particular matter. You are correct in that selectivity and aggressiveness are Fritz parameters -- but they are mentioned in the Junior 6 online help. And things like threshold are NOT discussed. Poor documentation job. > >Uri
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