Logic Masters Deutschland e.V.

Four Keys

Rules:

1. Normal Sudoku rules apply. The numbers 1-9 appear exactly once in every row, column and 3x3 box.

2. German Whispers Lines. Adjacent digits on the green lines must have a difference of at least five. Digits may repeat on the lines if allowed by other rules.

3. Regional Sum Lines. All German Whispers Lines are also Region Sum Lines. On each line that passes through multiple regions, digits have the same total in each region it passes through.

Solve on SudokuPad

Please Enjoy!