...The system can also integrate with a shared database to contribute discovered seeds, enabling collaborative data gathering across users. Advanced features include brute-force algorithms that refine seed candidates based on structural patterns and hashed seed calculations.
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.