Strictly Sudoku
21-05-2012
Each column of nine cells must contain each of the numbers from 1 to 9 once and only once.Each of the nine 3 by 3 boxes of nine cells must contain each of the numbers from 1 to 9 once and only once.Each row of nine cells must contain each of the numbers from 1 to 9 once and only once. The sudoku starts with a partially filled grid and you must complete the grid while following the rules above. If you complete the grid, you have solved the sudoku.
