Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

Modular Lines: All lines are Modular Lines. Any run of 3 digits along a line must include one digit from each of the modulo 3 sets, i.e. one from (1, 4, 7), one from (2, 5, 8) and one from (3, 6, 9).

Hidden Arrows: Yellow lines are also Hidden Arrows. They have the digit on one of their end that is the sum of all the other digits on the line.

Kropki: Digits connected by a black dot have a 1:2 ratio (one is double the other).