Logic Masters Deutschland e.V.

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Rules:

Global Entropy: Each 2x2 box in the grid must contain a low digit {1,2,3}, middle digit {4,5,6} and high digit {7,8,9}. Any 2x2 box in the grid which contains an Entropic line is not required to comply with the Global Entropy rule.

Global Modulo 3: Each 2x2 box in a grid must contain a digit from each modulo 3 set: {1,4,7}, {2,5,8} and {3,6,9}. Any 2x2 box in the grid which contains an Modular line is not required to comply with the Global Modulo 3 rule.

Entropic lines: Any set of 3 digits along the beige entropic line must contain a low digit {1,2,3}, middle digit {4,5,6} and high digit {7,8,9}.

Modular lines: Any set of 3 digits along the teal modular line must contain a digit from each modulo 3 set: {1,4,7}, {2,5,8} and {3,6,9}.

Kropki pairs: Digits in cells separated by a black dot are in a 2:1 ratio. Digits in cells separated by a white dot are consecutive. Not all dots are necessarily given.