Did you ever feel that solving a Sudoku on a computer just isn't the same as solving it with pencil and paper?
This is the reason why thumbSudoku has a clear focus on providing an intuitive and innovative user interface, which makes entering numbers and notes a joy.

Of course, thumbSudokus has many other features: It saves Sudokus to continue playing later, has scan support, features Ariadnes thread, error correction, different styles and more...