Logic Masters Deutschland e.V.

A snake appears in the grid. Its head and tail are on the perimeter of the grid, and their positions are to be determined. The snake may not touch itself orthogonally, and its head and tail may not be in any of the four corner cells.

The 7 grey cells are not part of the snake, and contain each of the digits 1-7, indicating the number of snake cells they are touching. The yellow cells are part of the snake, and contain a digit equal to the number of snake cells appearing in its respective box.

The snake's length will be a multiple of 9, and each set of 9 cells (starting from either end) will contain the digits 1-9.

The numbers outside the grid are Snake Sums and indicate the sum of the snake cells in the row or column.

Normal sudoku rules apply.

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