Logic Masters Deutschland e.V.

• Normal sudoku rules apply: Place the digits 1-9 once each in every row, column, and 3x3 box.
• Negators: Place 9 'Negator' cells in the grid so that there is exactly one Negator in every row, column, and 3x3 box. Each Negator cell must contain a different digit. The value of a Negator cell is equal to -1 times the digit it contains.
• Parity Lines: Neighboring digits along a red line must have different parities (even/odd).
• Killer: The values of the digits in a cage must sum to the total in the top left corner of the cage.

Solve in SudokuPad