Logic Masters Deutschland e.V.

Normal Sudoku rules apply.
- DUTCH WHISPER (orange line): numbers must be at least 4 apart from their neighbours.
- KROPKI: two numbers between the black dot are in a 2:1 ratio, and two numbers between the white dot are consecutive. Not all possible dots are shown.
- KILLER CAGES: numbers in the cage sum to the number in the top-left corner of the cage.
- MIN/MAX: Numbers in the grey cell in the 4 corner regions are bigger than their orthogonal neighbours. The number in the grey cell in the centre region is smaller than its 4 orthogonal neighbours.
- SKYSCRAPERS: Digits in the rows/columns with a 5 outside (excluding the little killers) represent the height of a building in that cell. Taller buildings obstruct the view of shorter ones behind them. Clues outside the grid give the number of buildings visible from that vantage point in the clue's row or column.
- LITTLE KILLERS: Digits along marked diagonals sum to the number indicated outside the grid.

(Created with Sudokumaker)

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