Fill the 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids
that compose the grid (also called "boxes", "blocks", or "regions") contains all of the digits from 1 to 9.
Controls
Number Buttons: Fill the selected cell
Notes Mode: Toggle to enter small candidate numbers
Erase: Clear the selected cell
Hint: Reveals the correct number (limited)
Undo/Redo: Revert or replay your moves
Advanced Features
Notes Styles: Choose between grid, corner, or hidden notes
Highlighting: Visualize number conflicts and relationships
Statistics: Track your performance over time
Multiple Themes: Light, dark, and blue color schemes
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