Logic Masters Deutschland e.V.

That feeling when you stare at the puzzle and it impassively stares right back at you.

Normal sudoku rules apply. Place the digits 1-9 once each in every row, column and 3x3 box.

• Adjacent digits along an orange line must have a difference of at least 4.
• Digits separated by a black dot are in a 1:2 ratio. Not all dots are given.

The puzzle is available online via Sudokupad