Normal 6x6 sudoku rules apply. Place the digits 1 - 6 once in every row, column and box.
Quads: Digits in a white circle must appear in the four cells touching the circle.
Little Killers: Numbers outside the grid show the sum of digits in the direction of the arrow. Questions marks are values that must be determined by the solver. All question marks represent the same value.
Solve Online : Solution Check is enabled
Solution code: Row 6
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