Board window: Home – Add Kibitzer - Engine parameters.
This is a function for experts – normally the default values will do fine when you work with an analysis engine.
The engine parameters influence the analysis style of the engines. For instance increasing aggressiveness will generally make a program find mate combinations faster. In certain engines you will find more and different parameters to set. For example, Nimzo allows you to set piece values, which is useful when you are solving studies.