Logic Masters Deutschland e.V.

Normal Sudoku Rules: The digits 1-9 must be placed in each row, column, and box so that no digit is repeated in a row, column, or box.

Entropic lines: Each group of 3 digits along a peach line must contain a digit from each group of 123, 456, and 789.

German whisper lines: Digits along a green line must differ by at least 5.

Even box: Digits in a gray box are must be even.

Renban lines: Digits along a purple line must be a group of consecutive digits in any order.

Double arrows: Digits along the line between two circles must sum to the sum of the digits in the circles.

Kropki: Digits touching a black dot must in an a 1:2 ratio. Digits touching a white dot must be consecutive.

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