Setting a rule based on the action of checking and THEN unchecking a box

Question

I have a form where certain checkboxes are assigned a points system.

Example:

if field 1=True add 1 point to "points Total" field, subtract a point if Field 2=true.

I have the rules set up for that situation, but I run into a problem where a user can check a box (thus adding the point) and if he unchecks the same box, that point remains. He can then keep adding points by re-clicking that box.

Is there a rule that can say "if field 1 goes from "false" to "true" add 1 point but if field 1 goes from "True" to "false", subtract 1 point.

I hope this makes sense.

Thank you

Answer 1

Add two rules for the same checkbox for checked and unchecked. Increment if checked and subtract if unchecked.

Here Title is the checkbox and Year is the field you want to increment or decrement.