Logic Masters Deutschland e.V.

• Normal sudoku rules apply:
  In every row, column and in every 3x3 box the digits from 1 to 9 have to appear atleast once.
• XV:
  Cells joined by an X or V must sum to 10 (X) or 5 (V).
  Not all X's or V's given.
• Killer cages:
  Digits in cages must sum to the number in the top-left corner and cannot repeat.
• Double arrows:
  The sum of the digits along a ‘double arrow’ line is equal to the sum of the digits in the circles at either end of the line.

Play the puzzle here:

Play in Sirxemic’s Sudokumaker or in Sven's Sudokupad.