This file (http://www.survo.fi/puzzles/matrix-examples.zip)
includes examples from an article:

Vehkalahti, Kimmo and Sund, Reijo (2013).
Solving Survo Puzzles using Matrix Combinatorial Products.
To appear in the Journal of Statistical Computation and Simulation.

To access these files, download Survo R from http://www.survo.fi/
(requires R from http://www.R-project.org/) and save the files of
this zip file in an empty directory (folder) on your computer.

Open Survo R, and use File -> Change directory to locate the files.
Then use File -> Load edit field to open the file EXAMPLES.EDT
and follow further instructions given there.

