A simple version of the classic game sudoku without ads or unnecessary features.
Allow multiple Marks:
When enabled multiple marks can be placed in each cell; only cells with a single mark will be checked for correctness. When disabled new marks will overwrite previous ones.
Auto Mark:
When enabled the bottom keyboard will act as a number selector and clicking on a cell will input the number. When disabled clicking on a cell will focus the cell and clicking on the bottom keyboard will input clicked number number.
Auto Validate
When enabled incorrect cells will automatically be highlighted in red.
Highlight Related Cells:
When enabled cells which are in the same box, row or column as the hovered cell will be highlighted
Skip Disabled Cells:
When enabled and using keyboard navigation cells which cannot be selected will be jumped over