I put some parameters in order that travelers have to book at least 2 nights if they arrived on Friday or on Saturday.
It works well.
But, when I have no reservation on the week, I would like to deactivated for the following Friday and saturday in order to allow travelers to book only for 1 night (example only Friday or only saturday)
It is not possible automatically, because it is a "If X then Y" situation and the static system, which Airbnb is, has no programmable options.
You can only do this manuallly by creating a rulesset for 1 night stay and apply it to the specific friday/saturday you want it to be active. It will overrule the options set elsewhere.