Logic Masters Deutschland e.V.

My friend (lgastako) made a puzzle yesterday with a neat mechanic. So, I was inspired to make this puzzle. Please enjoy and as always feedback is appreciated and useful!

• Normal Sudoku Rules: Fill each row, column, and 3x3 box with the digits 1-9 once each.
• Global Modularity: Every 2x2 box must contain at least one digit from each of the sets {1,4,7}, {2,5,8} and {3,6,9}.
• German Whispers: Along green lines, digits must differ from their neighbors by at least 5.
• Killer Cages: Digits in cages must not repeat and must sum to the number in the upper left corner of the cage (if present).
• Extra Regions: Every shaded region must also contain the digits 1 through 9 without repeats.

Play online using Sudokupad