Logic Masters Deutschland e.V.

Normal sudoku rules apply. Place the digits 1-9 once each in every row, column, and 3x3 box.
Anti-Knight: Cells separated by a knight's move in chess cannot contain the same digit.
Killer: Digits in cages sum to the total given in the top-left corner of each cage.
Region Sum Lines: Blue lines have the same sum in each box that they pass through. Different lines may have different sums.

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If you enjoyed this puzzle, consider checking out my other puzzle Heat Dome.