Logic Masters Deutschland e.V.

Normal sudoku rules apply. Place the digits 1 - 9 once in every row, column and box.

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

Rotational Sums of 9 or 18: All digits in the grid have a 180 degree rotational opposite. Every digit and its rotational opposite add to either 9 or 18.

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Try some of my other puzzles using Rotational Symmetry here:

Foggy Rotational Symmetry

Quads and Rotational Symmetry

Cages and Renban Symmetry

Rotational Symmetry Never 10

9x9 Rotational Palindromes

Non Consecutive Thermo Symmetry

Thermo Rotational Symmetry

Irregular Rotational Symmetry

Rotationally Symmetric Constraints

Rotationally Symmetric Constraints No. 2