Using the keyboard

Hover the mouse over the grid. Type the number you want to write to the cell. Press the space bar to toggle between entering final numbers or pencil marks.

Using the mouse

Point to the cell you want to change and left-click to display a selector.

Using the selector you can add or change the value, add or remove pencil marks or change the color of the cell.

Adding numbers

Touch a cell on the grid to select it, then use the number keypad to enter a number.

Adding/removing pencil marks

Select the pencil mark keyboard. Select the cell. Use the pencil mark keyboard buttons to add or remove pencil marks.

Coloring

Select the colors keyboard. Select the cell. Click on a color button to color the cell.

Highlighter

Select the highlighter keyboard. Click on the number highlighter buttons to choose the numbers to highlight on the grid. Click again to remove the highlights.

Load/Save puzzles and options

Click on the gear button. Use the buttons to choose from Load, Save, Options, Export or Restart.

What do you think about this?

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