Logic Masters Deutschland e.V.

by Md88keys

Play in Sudokupad

Normal sudoku rules apply.

Quad Circles: Digits in a circle must appear at least once in the four surrounding cells.

Green, Blue, and Yellow Difference Lines: The difference between each adjacent digit on any line is a number on that exact line. A digit that appears on a line may repeat only on any line of that same color. (Each color line is a different thickness for visual contrast if needed.)