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Subject: Selectivity for long time controls.

Author: José de Jesús García Ruvalcaba

Date: 11:05:01 07/30/99


	A few weeks ago somebody asked which selectivity levels were better for CM6000
to analyze at very long time controls, suited for correspondence play.
	The advice given was to use zero selectivity. I do not remember why I did not
answer at that time, but my advice is exactly the opposite: the longer the time
control the higher the selectiviyy level should be set, and not only for CM6000
but for any program that allows you to change it.
	The reason is that, due to the exponential nature of the search tree, the extra
time is almost worthless when using no selectivity or very low selectivity.
Jos



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