Logic Masters Deutschland e.V.

Stress Test

Normal sudoku rules apply.

When completed, this puzzle contains one single line which starts in R1C1 and ends in R9C9.

Small segments of the line are given throughout the grid; the solver must connect them into one continuous line that meets the requirements listed below.

The line is a German whisper (adjacent digits on the line must differ by at least 5), with additional requirements that must be met.

The line visits each box exactly once and must pass through at least three cells in every box. The line only moves to orthogonally adjacent boxes.

The line uses every digit at least once except for 5 and does not cross itself at any point.

For adjacent digits on the line within the same box, their sums must be all less than 10 or all greater than 10 for that entire box.

For adjacent digits on the line in different boxes, their sum is exactly 10.

The grid is covered in a dense fog. Correct digits may clear fog throughout the grid. No guessing is required.

Puzzle can be played here: Stress Test