Logic Masters Deutschland e.V.

Normal sudoku rules apply.

Digits along a red line are either all odd or all even.

There are nine doubler cells and nine halver cells in the grid, one of each in every row, column, and box. Each digit from 1-9 appears in a doubler cell and a halver cell exactly once.

A doubler cell's value counts as double its digit and a halver cell's value counts as half its digit.

Killer cages must contain values that sum to the number in the top left of the cage. Digits and/or values may repeat in killer cages if allowed by other rules.

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