Logic Masters Deutschland e.V.

Irregular Sudoku rules apply. Place the digits 1 - 9 once in every row, column and bold outlined region.

Rotational Sums of 10: All digits in the grid have a 180 degree rotational opposite. Every digit and its rotational opposite add to 10. Eg. R1C2 and R9C8 must add to 10. Eg. R5C4 and R5C6 must add to 10.

Renban Lines: Purple lies must contain a non-repeating set of consecutive digits in any order.

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Note: If you are struggling, then consider the way the non-symmetric regions interact with the Rotational Sums of 10 rule. Good luck and have fun.