Logic Masters Deutschland e.V.

A new series of puzzles: The Mobile series investigates what happens when you take constraints that are normally given outside of the grid and include them as another part of the puzzle that you must solve.

Normal Sudoku rules apply.

• Sandwich - when summing digits, ignore all cells that do not appear in a sequence between the 1 and the 9 in the row or column you are summing.
• Skyscraper - cells within a sandwich have a height equal to their value. When summing digits, ignore any cell that cannot be seen because it is shorter (smaller) than a previous digit.
• For each arrow, sum all cells starting from the arrow head and following the arrow until the edge of the board (use sandwich and skyscraper logic to generate the sum). The sum must equal the value in the arrow head.
• Cells separated by an X sum to 10.

https://sudokupad.app/jws2p3562u

Rules example