Pen based Tools for Sudoku Solving - a Case for Representational Flexibility?

Representational flexibility can be seen as one of the essential advantages of pen based input over conventional computer tools, especially for creative and problem solving tasks. We have tried to demonstrate this benefit in the area of Sudoku solving. However, it turned out that the supposedly obvious affordances of the pen based environment were not really exploited in our exploratory studies. This finding should be further explored and considered in an integral design and introduction of pen based applications.demonstrate this benefit in the area of Sudoku solving.