Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which typically has a unique solution.

You are in intermediate level. 60% of the digits will be displayed.
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Language used :
jQuery (highlight Sudoku boxes), and
PHP (generate Sudoku question)

Check answer	Give up!	Restart game