Single Vs. Multiple Checkboxes opening different fields

I can't figure out how to create this condition...
When only one check box is selected (any checkbox) I open up a new field, this I can create.

However, I want to create a separate rule where I have 4 or more checkbox options and when any of the two or more check-boxes are selected it opens up a different field.

And the field that opens with only one check box doesn't open.

Is it possible to create this condition?

Thank you!

It is possible by using a workaround. 

1. Add 1 as calculation value to the checkbox options:

2. Add a form calculation field and add the checkbox field to the formula (the field can be hidden):

http://www.jotform.com/help/259-How-to-perform-calculation-in-the-form 

3. Add a condition that if the calculation field is equal to 1 show field A:

4. Add a condition that if the calculation field is greater than 1 show field B

You can test and clone the demo form:  

https://form.jotform.com/61286270731959 

Let us know if we can assist you further.