Logic Masters Deutschland e.V.

Rules:

Normal sudoku rules - Enter a digit from 1-9 in each cell without repeating in a row, column, or box.

Modular lines - Along each teal line, every set of consecutive three digits contains one from the set of {1,4,7}, one from {2,5,8}, and one from {3,6,9}. If the line has only two digits, those digits are from different sets. (Digits can repeat on these lines if allowed by sudoku rules.)

Also, in this puzzle, each line sums to four times its length. For example, the digits in a line spanning four cells will sum to 16.

Play the puzzle on Sudokupad

I hope you enjoy the puzzle! :-)