Place numbers in the grid such that each row, column and 3x3 box contain the numbers 1 to 9. The sum of the digits within each dotted subarea equals the number given in the top left corner of that subarea. No digit can occur more than once in each subarea.
EXAMPLE:
UNIQUE SOLUTION:
2 comments:
This is one of the most interesting variations of sudoku.
Not one of my personal favourites though!
This sudoku is also called 'Sum Sudoku'
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