Logic Masters Deutschland e.V.

Good Night Co-Captain by Fire Truck Fuel

Normal Sudoku rules apply.

Region Sum Lines - Box borders divide light blue lines into segments of equal sum.

Killer Cages - Values in cages sum to the small number at the top. "Box X" refers to the sum of a single complete 3x3 region. Which region and it's sum must be deduced by the solver.

German Whisper Loop - Values of adjacent cells on a green line must have a difference of at least 5.

Five Lines (V) - The values of each pair of adjacent cells along a red line sum to five.

Doubler Cells - The puzzle contains 9 doubler cells that do not repeat in any row, column or 3x3 box. Each of these cells contains a different digit and those digits must be multiplied by 2 to calculate the value of that cell. One doubler cell has been given and is marked by a pink square.