You are playing the puzzle that was published on Thursday, 17th of August 2023.
This puzzle is rated (very difficult).
Caution: leaving this page without saving will erase the current progress.
Hover the mouse over the grid. Type the number you want to enter in the cell. Press the space bar to toggle between entering final numbers or pencil marks.
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.
Touch a cell on the grid to select it, then use the number keypad to enter a number.
Select the pencil mark keyboard. Select the cell. Use the pencil mark keyboard buttons to add or remove pencil marks.
Select the colors keyboard. Select the cell. Click on a color button to color the cell.
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.
Click on the gear button. Use the buttons to choose from Load, Save, Options, Export or Restart.
This is still a work in progress. If you have suggestions for improvement or if you find any problems,
please let me know using the contact form.
Thank you for any feedback!