Modals/must end/should end/has to end

1-The match must end before you get here.
2-The match has to end before you get here.
3-The match should end before you get here.

4-The match must be over before you get here.
5-The match has to be over before you get here.
6-The match should be over before you get here.

In which of the above cases:
a-an obligation is being expressed. Those invloved in the match are under the obligation to finish it before you get here.
and which cases:
b-a logical inference is being expressed. The speaker believes that it is highly likely that the match will be over by then.

Gratefully,
Navi.