How to Play Sandwich Sudoku

THE PLAYBOOK · 5438GAME

Learn the rules of Sandwich Sudoku

Bring your attention to one round of Sandwich Sudoku. Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Use the example below to understand a decision. Begin with the solo mode shown on the page. Use the example below to understand a decision.

This collection contains 8 puzzles. Progress is saved in this browser. The same puzzle can appear again; the collection is not labelled with calibrated difficulty levels.

An idea for your next attempt

Read one step at a time and try it on the playing area. Match the instruction to the control you use. Keep the objective visible.

What you are aiming for

Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Read that aim before choosing your first action. Keep the controls in easy reach.

Making your moves

1. Select an editable cell.
2. Enter a value using the keypad or keyboard; Notes stores candidates.
3. Read the region, cage, arrow or outside clues alongside the normal constraints.
4. Check entries verifies the completed board; Undo reverses your last input.
5. New puzzle selects another included puzzle.

Input guidance

Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game. Use the control method described here for this activity. Read the example below alongside these instructions.

A useful example

If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13. Compare this with the rule that governs the move. Choose a deliberate next step.

A common point of confusion

A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Read the feedback to see why an action did not have the expected result. Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention.

Common questions