Logic Masters Deutschland e.V.

Rules:

With many thanks to Marty Sears for the edge lines idea:

Normal sudoku rules apply.

DYNAMIC FOG:

Each spot along a coloured edgeline has a value, found by performing a calculation using the two digits it sits between:

SPOT RULES:

• Sum (+) spots: The value of a spot with a plus sign equals the sum of the two digits it sits between.
• Difference (-) spots: The value of a spot with a minus sign equals the larger digit minus the smaller digit.
• Ratio ( / ) spots: The value of a spot with a forward slash equals the larger digit divided by the smaller digit. (The value will always be an exact integer.)

LINE TYPES:

• Blue lines are 'region sum edgelines'. Box borders divide blue region sum lines into segments with the same sum. The sum must be determined for each blue line.
• Brown lines are 'constant edgelines'. Spot values along a brown line are all the same. This constant value must be determined for each brown line.
• Green lines are 'German edge-whispers'. The value of any two adjacent spots along a green line have a difference of at least 5.
• Grey lines are 'edge thermos'. Spot values along an edge thermo strictly increase as you move away from the end with the bulb (the large spot.)