Sodoku Print 2

This program produces documents with 6 sudoku puzzles on a page. The difficulty of the puzzles is adjustable via the program preferences. There are many Sudoku programs where the user solves puzzles on the computer screen but none that I know of hat are designed to print them out in a dense paper saving form for solving on the couch with a pencil.

The kernel of Sodoku Print is a puzzle generating algorithm based on the work of Guenter Stertenbrink.

I have used the Model View Controller (MVC) design pattern to design this document based application in Cocoa using xcode. The source code is included. The original code by Guenter is released into the public domain, and I am releasing
this code under the GPL license.

You my use this code under the terms of that license. Im always interested in hearing about how my code can be improved. Im fairly new to cocoa
programming and the mac frameworks, so if you know of a better way to do something in my code, Id love to hear about it.