Logic Masters Deutschland e.V.

Trapped Snake

This is a collab puzzle with gdc hope you enjoy it.

Rules:

Normal Sudoku rules apply.

Draw a one-cell-wide loop of orthogonally connected cells. The loop can't touch itself, not even diagonally.

All cells enclosed by the loop lie on a snake. The snake is one-cell-wide, and doesn't branch or touch itself, not even diagonally. The snake and the loop can't share cells.

Box borders divide the snake into segments with equal sums.

Every run of three digits on the loop contains a digit from {1,4,7}, a digit from {2,5,8} and a digit from {3,6,9}.

All squares are on the snake. A digit in a square counts the number of snake-cells or the number of non-snake-cells in the box.

CTC