Logic Masters Deutschland e.V.

I took another crack at setting a global entropy puzzle that is not too easy and not too hard. I think I managed to do so. Feel free to let me know how you got on with it.

Solve online: CTC, f-puzzles

Rules:

Normal sudoku rules apply.

German whisper: Adjacent digits along a green German Whispers line must have a difference of at least 5.

Ten-Line: A gray ten-line must be divided into one or more contiguous groups of cells that each sum to 10.

Quadruple: Digits in a quadruple clue must appear in the four surrounding cells at least once.

Global entropy: The low digits (1, 2, 3), middle digits (4, 5, 6) and high digits (7, 8, 9) are defined as three different groups. In the finished grid each 2x2 box has to contain at least one digit of each group.