THE PLAYBOOK · XJFDJSZP
Learn your way around Sandwich Sudoku
Sandwich Sudoku gives you a focused activity to play in your browser. 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. Check the rule that explains your first action. Check the relevant rule before repeating a move.
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.
Practice beyond the first move
After a move, check what changed. Decide which rule explains the new state before acting again. Use the example to check your reasoning.
The goal to keep in mind
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. Notice how the game responds to your input.
The order of play
- 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.
Keyboard and screen controls
Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game. On a smaller screen, keep the active part of the board within view. Use one clear input at a time.
See the idea in action
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. Take a moment to compare.
Keep this in mind
A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction. Compare the situation with the worked example. Locate the buttons and input area before beginning a long round. Use the on-screen labels to avoid an accidental restart.
Read these answers for extra help
As a new player, what is the goal of Sandwich Sudoku?
Solve the Sudoku while each outside clue gives the sum strictly between 1 and 9 in that row or column.
When I return, how do I control Sandwich Sudoku?
The key detail is this: Click or tap cells and the digit pad. Use Notes, Undo and Reveal selected. Large boards scroll inside the game.
As a new player, what example helps explain Sandwich Sudoku?
If the values strictly between 1 and 9 are 2, 4 and 7, the sandwich clue is 13.
On this playing page, what should I watch out for in Sandwich Sudoku?
For clarity: A full board must obey every extra rule. Reveal supplies assistance; it is not an earned deduction.
Before I begin, what format does Sandwich Sudoku offer?
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.
As a new player, 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.