Do they usually end with mate-in-1? Or mate-in-2? I know at that level they're generally capable of identifying "probably a mate in 9 or so" and knocking off r

Do they usually end with mate-in-1? Or mate-in-2? I know at that level they're generally capable of identifying "probably a mate in 9 or so" and knocking off rather than wasting time. I wonder how much closer it gets.