The CSPLib site is mirrored in Scotland and the United States.
However, the US site is not updated as frequently as the Scottish.

CSPLib: a problem library for constraints

maintained by Ian P. Gent
ipg@cs.strath.ac.uk
and Toby Walsh
tw@cs.strath.ac.uk
with help from Bart Selman
selman@cs.cornell.edu

Overview

CSPLib is a library of test problems for constraint solvers. The library consists of:

The main motivation for CSPLib is to focus research in constraints away from purely random problems and onto more structured problems.

To propose new entries, or to extend or correct existing entries, pleas email csplib@cs.strath.ac.uk.

Number of different visitors to CSPLib: