THE PLAYBOOK · HONGRENYOU
How to play Sandwich Sudoku
Read the aim of Sandwich Sudoku, then make your first move. 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. Read the objective before making your first input. Look at what changes after your first action.
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.
Review a difficult moment
When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round. Keep the objective visible.
Your goal
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. Follow this game’s rules rather than another version’s.
Step by step
- Select an editable cell.
- Enter a value using the keypad or keyboard; Notes stores candidates.
- Read the region, cage, arrow or outside clues alongside the normal constraints.
- Check entries verifies the completed board; Undo reverses your last input.
- 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 careful first action helps you become familiar with the layout. Make sure you are interacting with the game rather than the surrounding page.
A useful example
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13. Your next round may have a different position, so inspect it before acting. Look for the relevant detail.
Watch out for this
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. Choose one rule to keep in mind for this round. Apply it consistently rather than guessing what another version might allow.
Common questions
For this browser game, what is the goal of Sandwich Sudoku?
Keep this in mind: Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column.
For a quick reminder, how do I control Sandwich Sudoku?
Keep this in mind: Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
Before I begin, what example helps explain Sandwich Sudoku?
Here is the relevant explanation: If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.
Before I begin, what should I watch out for in Sandwich Sudoku?
Here is the relevant explanation: A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
While reading the Guide, what format does Sandwich Sudoku offer?
For clarity: 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.
While learning, which play mode does Sandwich Sudoku use?
Keep this in mind: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.