Normal Sudoku rules apply. Each row, column, and 3x3 box contains each number from 1 to 9 exactly once.
Killer Sudoku rules apply. The sum of all numbers in a cage (marked with dashed lines) must match the small number printed in its corner. No number appears more than once in a cage.
On the outer red ring the even and the odd digits are alternating (an even cell has two odd cells as neighbors and vice versa). The solver has to find out the right pattern.
On the red S the neighboring cells contain consecutive numbers.
The puzzle is also available online.
Solution code: Row 9 and Column 7
on 30. October 2021, 00:09 by uvo_mod
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