🥪 Sandwich Sudoku

In Sandwich Sudoku, each number outside the grid is the sum of the digits between the 1 and the 9 in that row or column (not counting the 1 or the 9).

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📖 How to play Sandwich Sudoku

  1. The sudoku rules apply: 1 through 9 with no repeats in each row, column, and 3x3 box.
  2. The number outside a row or column is the sum of the digits left between the 1 and the 9 in that line (the "filling of the sandwich" between the two "slices," which are the 1 and the 9).
  3. A 0 means the 1 and the 9 sit right next to each other (nothing between them).
  4. Each puzzle has a unique solution.

💡 Tip: locating the 1 and the 9 in each line is key. A sum of 0 means they're adjacent; a very high sum means they're near the ends.

📖 Want to master it? Read the full guide: How to play Sandwich Sudoku: rules and tricks.