# Call for Problem Submission for the MiniZinc Challenge 2013

The MiniZinc Challenge is an annual solver competition in the
Constraint Programming (CP) community held before the International
Conference on Principles and Practice of Constraint Programming.
The MiniZinc Challenge 2013 is seeking interesting problem sets on
which various constraint solving technologies should be compared on
this year. Everyone is allowed to submit problems regardless of
whether they are an entrant in the challenge.

## Important dates and deadlines:

- Problem submission open: now
- Problem submission deadline:
**Fri, 14 June 2013**

## Problem submission

- Send an email with the subject line “[MZNC13] benchmark” to mzn-challenge 'at' minizinc.org

There are no restrictions on the kind of problems, but ideally they
should be of interesting nature such as practice-related problems and
puzzles etc. Problem submissions with real-world instances are welcome
warmly. Models for the 2013 challenge can only use integer and Boolean
variables.

The problem submitter provides a MiniZinc model of the problem and
20 instances ranging from easy-to-solve to hard-to-solve for an
“ordinary” CP system. It is strongly encouraged to make use of the
global constraint definitions provided in the MiniZinc 1.6 distribution.
Please, follow the links below for submission instructions and requirements.

www.minizinc.org/challenge2013/challenge.html

www.minizinc.org/challenge2013/rules2013.html