This command is to be used with a number in the range 0..255, in combination
with a "UserScore" command, and it sets the effect of user defined scores
when they are mixed with usual scores calculated by mnoGoSearch.
The default value is 0, which means the user defined scores are not taken
into account and the final score values only depend on the internal scores
as calculated by mnoGoSearch. 255 means maximum effect of user defined values.