Logic Masters Deutschland e.V.

Rules:

1. Normal sudoku rules apply.

2. Normal sandwich sudoku rules apply using the black clues outside the grid (black clues outside the grid indicate the sum of the numbers sandwiched between 1 and 9 in that row or column).

3. You must draw 5 snakes in the grid. The tails of the snakes are the 5 cells adjacent to the 5 red clues outside the grid. The snakes are all 9 cells long and have exactly the digits 1-9. The red clues indicate the sum of the digits sandwiched between 1 and 9 in each snake. The snakes may not touch themselves orthogonally, though they may touch each other. Y and Z are for you to solve and can be any integer (they don't necessarily have to be different). The black X in the grid (row 7, column 3) indicates a cell that no snake can inhabit.

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