Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules apply.

NEGATOR CELLS: Each row, column and 3x3 box contains exactly one Negator cell. Each Negator cell contains a different digit. The value of a Negator cell is equal to the negative of its digit, e.g. a 3 in a Negator cell has a value of -3.

KILLER CAGES: The values of cells in a cage sum to the number in the top left corner of the cage. Digits don't repeat in a cage.

SANDWICH CLUES: Numbers outside the grid give the sum of the values sandwiched between the digits 1 and 9 in that row/column.

REGION SUM LINES: The 3x3 box borders divide the blue lines into segments. The values on each segment of an individual line sum to the same total. This total may be different for different lines.

ZERO SUMS: Values that are on the same grey shape sum to zero.

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