Observe killer sudoku
Click here to access the printed version.
Normal Sudoku rules apply, except that the numbers in the cells contained in the gray rows add up to the numbers in the corner. No number can be repeated in each shape formed by gray lines.
Buy next week's Observer digital edition to see the completed puzzle.
Click here to access the printed version.
Normal Sudoku rules apply, except that the numbers in the cells contained in the gray rows add up to the numbers in the corner. No number can be repeated in each shape formed by gray lines.
Buy next week's Observer digital edition to see the completed puzzle.
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