Logic Masters Deutschland e.V.

Rules

• The digits 1 to 7 met in a "killer cage", when suddenly one digit secretly murdered another digit.
• Place the six alive digits in each column, row and box once. The dead digit is not put in the grid, while the murderer digit is.
• A cells value equals to its digit. If a cell contains the murderer digit, its value equals to negative its digit.
• Killer-Cages: Values in a cage sum to the clue given in the top left corner.
• Arrows: Values along an arrow must sum to the value in the corresponding circle.