How Sudoku Dragon works

Our software uses the latest algorithms to generate and solve Sudoku puzzles.

The software is written by Silurian Software who have been developing complex software solutions for over twenty years.

It is written with the tried and tested Microsoft®'s Visual C++® package for the best compatibility with all existing Windows® based systems.

The software is carefully crafted so that it can solve grids of different sizes. The grid size of 9x9 is the most common one in use but all 'square' puzzles from smaller to larger are equally possible to generate and solve.

All puzzle games are stored in our own special file format (.sdk) so that the sequence of square allocations is stored together with all the game options. You can mail the puzzle to friends in this format. A game is restarted from exactly when you left it (remembers all that you have done so far). You can download our daily puzzles in this format or save a puzzle you entered online.

Our solution algorithm follows the same strategies as an experienced Sudoku puzzle solver. it gives easy to follow explanations as to why certain allocations are possible and why some are impossible.

There are many views about computer generated Sudoku puzzles, with some people believing that some human creativity is required. We believe our algorithm can generate five levels of puzzle difficulty that will appeal to many different players of the game from beginners right through to experts.

Using the latest web site software (using principally PHP) we have been able to make puzzles easy to contribute and share with other users. It makes getting help on a particular problem puzzle very straightforward.