Logic Masters Deutschland e.V.

Here is a new snake sudoku. But where is the snake?

This puzzle is available online via F-Puzzles

RULES:

• Normal Sudoku rules apply.
• Cells separated by an X sum to 10. Cells separated by a V sum to 5. (Negative constraints APPLY! If cells do NOT have an X or a V between them then they can NOT sum to 10 or 5.)
• There is a 'german whisper snake' hidden in the grid. The snake is a 1-cell wide path of orthogonally-connected cells. The snake never touches itself orthogonally but may touch diagonally. (It never ‘doubles back’ to cover a full 2x2 region.) Along the snake, digits in each pair of orthogonally-adjacent cells must differ by at least 5.
• Digits in circles are not part of the snake and indicate how many of the horizontally, vertically and diagonally adjacent cells are part of the snake. (Not all possible circles are given.)