How to Play Sandwich Sudoku

THE PLAYBOOK · SLTPPF

How to play Sandwich Sudoku

This SLTPPF page combines Sandwich Sudoku with a guide to the decisions it asks you to make. Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Use example-led learning to give your round a clear purpose.

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.

Example-led learning

Read the worked example, identify its key decision, then look for a comparable decision while you play.

Your goal

Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column.

Step by step

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.

Controls

Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.

A useful example

If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.

Watch out for this

A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.

Common questions