This software offers Sudoku games with various options including different sizes, colors, and letters. It also features different game variants such as Killer, Greater Than, and Consecutive. Users can edit and solve puzzles and create PDFs.

One great feature of this Sudoku program is its flexibility with board size. You can select a size anywhere from 4 to 20, with the default size being 9. And don't worry about getting stuck with unsolvable puzzles - every game has a unique solution.
Another cool aspect of this software is the ability to use your right mouse button to draw pencil marks. This can be especially helpful for bigger puzzles or for those who prefer to pencil in possible solutions before making a final decision.
But that's not all - this program also includes an editor and solver, making it easy to create your own puzzles or get help if you're stuck. Plus, it can create PDF files with multiple Sudoku puzzles per page.
Additional features include the ability to show candidates, unlimited undo/redo, saving positions to a file, viewing high scores, and getting hints if you're really stuck. Overall, this Sudoku program offers a great variety of puzzles and helpful tools to make your experience as enjoyable as possible.
Version 3.1: Editor, Show candidates, Odd-Even Sudoku, undo/redo works for pencil marks
Version 9.5.0.0: N/A