Solve printable Sudoku puzzels with a TwinPoint pencil or pen Solve printable sudoku puzzels with Less eye strain or fatigue with one of our Sudoku TwinPoint pencils or pens. They put 2 colors into 1 pencil or ballpoint pen, one color for Yes, one for Best Guess. Use them with free printable sudoku puzzles . . . even with an easy sudoku. http://sudokutwin.com/