How to make a field required if any checkbox selected?

Controller: a field with 2 checkboxes
Target: a text field

rule 1: target is visible if controller has value: (select form widgets doesn't seem to work so i have had success with regex = ([0-9]+)

rule 2: target is required if controller has value: same set up as rule 1 does not work. even hidden (nothing checked) the field is required.

is i use "from widget" for the required rule and select only 1 of the checkboxes in the rule; then both hidden and that 1 checkbox checked, do work. So technically i could likely make another ORed rule for the other checkbox; but in some cases i have dozens of checkboxes and don't think i should need a rule for each one, do i?