Logic Masters Deutschland e.V.

Normal Sudoku rules apply. Each row, column, and 3x3 box contains each number from 1 to 9 exactly once.

Disjoint Sudoku rules apply. Cells that appear in the same position relative to their default regions must not contain the same number.

Sandwich Sudoku rules apply. The numbers outside the grid show the sum of the digits sandwiched between 1 and 9 in that row or column.

Numbers along a between line must be between the numbers on the circled ends of the line.

The puzzle is also available online.