Select a difficulty to begin. Fill in the grid so that every row, column, and 3x3 box contains the numbers 1-9. Given numbers cannot be changed.
Hover over cells to highlight related positions. Use numbers 1-9 to fill cells. Click the Solve button when finished to reveal the solution.
Left click to select tiles, type to place number. Right click to draw, select colors and eraser on the right.
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