Logic Masters Deutschland e.V.

Standard Sudoku rules apply.

The board has different colored lines on it. The two cells connected by the lines may be one of the following four cases:

- Sum is 5;

- Sum is 10;

- Difference is 1;

- Ratio is 1:2.

Lines of the same color represent the same situation; lines of different colors are different and need to be inferred by the solver. Not all lines are given.

Identical pairs are directly connected by only one color line (e.g. 2 and 3 are connected by a line with a difference of 1, they are not connected by a line with a sum of 5)

Play this puzzle on SudokuPad

If you are not sensitive to the color distinction in the diagram, use this link , which distinguishes the four colors using different shaped lines.