How to Play Sandwich Sudoku

THE PLAYBOOK · ZXZXMR

How to play Sandwich Sudoku

Choose a round of Sandwich Sudoku and settle into its rules. Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. Look at what changes after your first action. Begin with the solo mode shown on the page. Choose a clear next step rather than rushing through the instructions.

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.

Build a steady rhythm

Take enough time to read a new position. If a game has a timer, learn its controls first rather than searching for them during the round. Notice the feedback after each input.

Your goal

Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column. The feedback beside the game helps you follow the round. Start with a deliberate move.

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. Keep the playing area visible while using these controls. Contact us with the game and device if a control does not respond.

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. Consider the next action carefully.

Watch out for this

A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. A different version of the game may use a different rule. Before your first action, say what you are trying to achieve. Then compare the result with the goal.

Common questions