Logic Masters Deutschland e.V.

Rules:

Place the digits 1-9 into every row, column, and irregularly-shaped 9 cell region.

Dutch Whisper: Adjacent digits along an orange line must differ by at least 4.

Renban: Digits along a purple line form a set of consecutive digits in any order.

Kropki Dots: If two digits are separated by a black dot, one is double the other.

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