Play Sandwich Sudoku Online Free

Play Sandwich Sudoku online for free. Clues outside the grid show the sum of digits sandwiched between the 1 and 9 in each row or column.

▶ Play Sandwich Sudoku — Free
🟢 Easy 🟡 Medium 🟠 Hard 🔴 Expert

How to Play Sandwich Sudoku

  1. Standard Sudoku rules apply.
  2. Clues outside the grid indicate the sum of digits between 1 and 9 in that row or column.
  3. A clue of 0 means 1 and 9 are adjacent — nothing between them.
  4. Find where 1 and 9 sit to unlock the sandwich constraint.
💡 Pro Tip
A clue of 35 means ALL digits 2-8 are between the 1 and 9 (2+3+4+5+6+7+8=35). A clue of 0 means 1 and 9 are neighbors.

Frequently Asked Questions

What does a Sandwich Sudoku clue of 0 mean?

It means the 1 and 9 in that row or column are directly adjacent — there are no digits sandwiched between them.

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