Logic Masters Deutschland e.V.

Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box.

Zipper Line: A lavender line has equal sums on pairs of cells equidistant to the center (indicated by a lavender circle); if the center is also the center of a cell, then that center equals the sum of pairs.

Skyscrapers: Clues outside the grid count the number of cells seen inside the grid of its row or column, where each cell inside the grid is a skyscraper of a height corresponding to its value and taller skyscrapers block sight of shorter ones.

Black Kropki: Cells separated by a black dot have values in a ratio of 1:2.

White Kropki: Cells separated by a white dot have values with a difference of one.

Expected Difficulty: 2 stars

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