Sudoku

User-Saved Puzzle

or

Options

Annotation Mode

Mark the puzzle with "pencil marks," or candidate numbers.

Use [Ctrl + Q] to toggle this option.

Enforce Number Rules

Prevent input of illegal numbers. Highlights erroneous row/column/box.

Use the arrow keys to easily navigate the puzzle.

Use the

Backspace

,

Delete

, or

0

keys to empty a cell.

Still under development

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