Logic Masters Deutschland e.V.

Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box.

Sumdex Lines: The 3x3 box borders divide each line into segments, with the last digit of a segment's sum being its index value. The index value of the Nth segment (starting from the diamond) indicates which segment has the index value of N. (For example, if the first segment has a sum of 24, then fourth segment's sum must be 1, 11, 21, 31, or 41.)

Modular Mirror: Any pair of cells reflected symmetrically across the negative diagonal (indicated by the dashed line) both contain digits of the same residual mod3, that is they are from the same set of either {1,4,7}, {2,5,8} or {3,6,9}.

Expected Difficulty: 4 stars

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