This is a simple app, created around an original sudoku solver based only on heuristics, not brute force. It's coded in Java/SWT(GUI toolkit). It's an example of MVC and of Visitor, Observer, Strategy, Abstract Factory, Singleton Design Patterns.
A java application for creating, playing and solving SuDoku puzzles of various types. Features both a Swing GUI and command-line operation. The automatic solving of puzzles uses "smart" techniques rather than a brute force search of every possibility.