Logic Masters Deutschland e.V.

Rules

• Normal sudoku rules apply.


• Doubler Cells: Shade nine cells so that there is exactly one shaded cell in each row, column and region. Shaded cells cannot contain repeated digits. If N is a digit in a shaded cell, the value of that shaded cell is 2N.


• Kropki Diamonds: Each diamond has at least one doubler cell in the four cells touching that diamond. At least one pair of diagonally connected cells touching a black diamond have values in a 2:1 ratio. At least one pair of diagonally connected cells touching a white diamond have consecutive values.


• Counting Cages: Unshaded digits cannot repeat in a cage. The values in a cage must sum to the number shown in the upper left corner of that cage. Each value N in a cage must appear in exactly N cages if N is a valid digit.


• Region Sum Lines: Box borders divide blue lines into segments in which the sum of the values is the same.