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Printable SudokuSolution of the printable sudoku N 9
The sudoku puzzle is mostly a 9-by-9 grid made up of 3-by-3 subgrids. Some cells already contain numbers, known as givens. The goal is to fill in the empty cells, one number in each, so that each column, row, and region contains the numbers 1 through 9 exactly once. Each number in the solution therefore occurs only once in each of three "directions". Or you can say there is only one rule. Every row, every column and every 3-by-3 subgrid should contain digits 1 to 9 only.
Hints to solution of the printable sudoku N 9
Try to fill the cell a3, b7, f8, i9, d5, d8, d2, c5, f5, e5, g4, i4, f2, g2, a9, e9, c9, h8.
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