What problems have you solved using constraint programming?
I'd like to know about specific problems <b>you</b> - the SO reader - have solved using constraint programming and what constraint logic language you used.

Questions:

* What problems have you used constraint programming to solve?
* What constraint logic language did you use?

<b>I'm looking for first-hand experiences, so please do not answer unless you have that.</b>

What problems have you solved using constraint programming?
===

I'd like to know about specific problems <b>you</b> - the SO reader - have solved using constraint programming and what constraint logic language you used.

Questions:

* What problems have you used constraint programming to solve?
* What constraint logic language did you use?

<b>I'm looking for first-hand experiences, so please do not answer unless you have that.</b>
