Logic Masters Deutschland e.V.

This puzzle is inspired by the awesome serie of loop puzzles by yttrio. The idea of adding a layer of chaos construction to the loop constraints has been in the back of my mind for some time. I already published a smaller version with the same ruleset. Maybe try it first before trying this one. It also features some logic that is a bit different from what you will find here. Have fun solving!

The puzzle :

Play on sudokupad.

Play on Penpa.

Rules :

- Chaos construction : Divide the grid into orthogonally connected 9-cell regions such that each cell is part of exactly one region. Fill the grid with digits 1-9 such that no digit repeats in any row, column or region.

- Whisper Loop : Draw a one-cell-wide loop of orthogonally connected cells. The loop may not touch itself, not even diagonally.

The loop visits each region exactly once.

The loop acts as a German Whispers line (i.e., adjacent digits on the loop must have a difference of at least 5).

- Arrow clues have a double purpose :

Digits in cells with arrows count how many loop cells are in the indicated directions combined (not including the cell itself).

Digits in cells with arrows also count how many cells are in the same region as that cell in the indicated directions combined (not including the cell itself). Region borders DO NOT block vision.