Logic Masters Deutschland e.V.

Standard Sudoku rules apply.
Each row, column, and region indicated by thick borders in the grid must contain the digits 1 to 9 once each.

Kropki pairs rules apply.
Cells separated by a white dot are consecutive.
Cells separated by a black dot are in a 1:2 ratio.
Not all dots are given.

Arrow rules apply.
Digits along an arrow must sum to the digit in its circle.

Double Arrow rules apply.
The sum of the digits along a ‘double arrow' line is equal to the sum of the digits in the circles at either end of the line.

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I knew nothing, Looking into the heart of light, the silence.